From 5499467d5d3d517f0d65ede72a6ac22cf6059eca Mon Sep 17 00:00:00 2001 From: Djordje Pesut Date: Mon, 20 Jul 2015 13:36:15 +0200 Subject: [PATCH] avcodec: Template creation for AAC decoder (SBR-module) Move the existing code to a new template file. Signed-off-by: Nedeljko Babic Signed-off-by: Michael Niedermayer --- libavcodec/aacsbr.c | 1428 +--------------------------------- libavcodec/aacsbr.h | 45 ++ libavcodec/aacsbr_template.c | 1410 +++++++++++++++++++++++++++++++++ libavcodec/sbrdsp.c | 75 +- libavcodec/sbrdsp_template.c | 95 +++ 5 files changed, 1552 insertions(+), 1501 deletions(-) create mode 100644 libavcodec/aacsbr_template.c create mode 100644 libavcodec/sbrdsp_template.c diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c index a39b78de18..766c47bc1c 100644 --- a/libavcodec/aacsbr.c +++ b/libavcodec/aacsbr.c @@ -42,252 +42,13 @@ #include #include -#define ENVELOPE_ADJUSTMENT_OFFSET 2 -#define NOISE_FLOOR_OFFSET 6.0f - #if ARCH_MIPS #include "mips/aacsbr_mips.h" #endif /* ARCH_MIPS */ -/** - * SBR VLC tables - */ -enum { - T_HUFFMAN_ENV_1_5DB, - F_HUFFMAN_ENV_1_5DB, - T_HUFFMAN_ENV_BAL_1_5DB, - F_HUFFMAN_ENV_BAL_1_5DB, - T_HUFFMAN_ENV_3_0DB, - F_HUFFMAN_ENV_3_0DB, - T_HUFFMAN_ENV_BAL_3_0DB, - F_HUFFMAN_ENV_BAL_3_0DB, - T_HUFFMAN_NOISE_3_0DB, - T_HUFFMAN_NOISE_BAL_3_0DB, -}; - -/** - * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) - */ -enum { - FIXFIX, - FIXVAR, - VARFIX, - VARVAR, -}; - -enum { - EXTENSION_ID_PS = 2, -}; - static VLC vlc_sbr[10]; -static const int8_t vlc_sbr_lav[10] = - { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 }; - -#define SBR_INIT_VLC_STATIC(num, size) \ - INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \ - sbr_tmp[num].sbr_bits , 1, 1, \ - sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \ - size) - -#define SBR_VLC_ROW(name) \ - { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) } - static void aacsbr_func_ptr_init(AACSBRContext *c); -av_cold void ff_aac_sbr_init(void) -{ - static const struct { - const void *sbr_codes, *sbr_bits; - const unsigned int table_size, elem_size; - } sbr_tmp[] = { - SBR_VLC_ROW(t_huffman_env_1_5dB), - SBR_VLC_ROW(f_huffman_env_1_5dB), - SBR_VLC_ROW(t_huffman_env_bal_1_5dB), - SBR_VLC_ROW(f_huffman_env_bal_1_5dB), - SBR_VLC_ROW(t_huffman_env_3_0dB), - SBR_VLC_ROW(f_huffman_env_3_0dB), - SBR_VLC_ROW(t_huffman_env_bal_3_0dB), - SBR_VLC_ROW(f_huffman_env_bal_3_0dB), - SBR_VLC_ROW(t_huffman_noise_3_0dB), - SBR_VLC_ROW(t_huffman_noise_bal_3_0dB), - }; - - // SBR VLC table initialization - SBR_INIT_VLC_STATIC(0, 1098); - SBR_INIT_VLC_STATIC(1, 1092); - SBR_INIT_VLC_STATIC(2, 768); - SBR_INIT_VLC_STATIC(3, 1026); - SBR_INIT_VLC_STATIC(4, 1058); - SBR_INIT_VLC_STATIC(5, 1052); - SBR_INIT_VLC_STATIC(6, 544); - SBR_INIT_VLC_STATIC(7, 544); - SBR_INIT_VLC_STATIC(8, 592); - SBR_INIT_VLC_STATIC(9, 512); - - aacsbr_tableinit(); - - ff_ps_init(); -} - -/** Places SBR in pure upsampling mode. */ -static void sbr_turnoff(SpectralBandReplication *sbr) { - sbr->start = 0; - // Init defults used in pure upsampling mode - sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 - sbr->m[1] = 0; - // Reset values for first SBR header - sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1; - memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters)); -} - -av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr) -{ - if(sbr->mdct.mdct_bits) - return; - sbr->kx[0] = sbr->kx[1]; - sbr_turnoff(sbr); - sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); - sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); - /* SBR requires samples to be scaled to +/-32768.0 to work correctly. - * mdct scale factors are adjusted to scale up from +/-1.0 at analysis - * and scale back down at synthesis. */ - ff_mdct_init(&sbr->mdct, 7, 1, 1.0 / (64 * 32768.0)); - ff_mdct_init(&sbr->mdct_ana, 7, 1, -2.0 * 32768.0); - ff_ps_ctx_init(&sbr->ps); - ff_sbrdsp_init(&sbr->dsp); - aacsbr_func_ptr_init(&sbr->c); -} - -av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr) -{ - ff_mdct_end(&sbr->mdct); - ff_mdct_end(&sbr->mdct_ana); -} - -static int qsort_comparison_function_int16(const void *a, const void *b) -{ - return *(const int16_t *)a - *(const int16_t *)b; -} - -static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle) -{ - int i; - for (i = 0; i <= last_el; i++) - if (table[i] == needle) - return 1; - return 0; -} - -/// Limiter Frequency Band Table (14496-3 sp04 p198) -static void sbr_make_f_tablelim(SpectralBandReplication *sbr) -{ - int k; - if (sbr->bs_limiter_bands > 0) { - static const float bands_warped[3] = { 1.32715174233856803909f, //2^(0.49/1.2) - 1.18509277094158210129f, //2^(0.49/2) - 1.11987160404675912501f }; //2^(0.49/3) - const float lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1]; - int16_t patch_borders[7]; - uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim; - - patch_borders[0] = sbr->kx[1]; - for (k = 1; k <= sbr->num_patches; k++) - patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1]; - - memcpy(sbr->f_tablelim, sbr->f_tablelow, - (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0])); - if (sbr->num_patches > 1) - memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1, - (sbr->num_patches - 1) * sizeof(patch_borders[0])); - - qsort(sbr->f_tablelim, sbr->num_patches + sbr->n[0], - sizeof(sbr->f_tablelim[0]), - qsort_comparison_function_int16); - - sbr->n_lim = sbr->n[0] + sbr->num_patches - 1; - while (out < sbr->f_tablelim + sbr->n_lim) { - if (*in >= *out * lim_bands_per_octave_warped) { - *++out = *in++; - } else if (*in == *out || - !in_table_int16(patch_borders, sbr->num_patches, *in)) { - in++; - sbr->n_lim--; - } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) { - *out = *in++; - sbr->n_lim--; - } else { - *++out = *in++; - } - } - } else { - sbr->f_tablelim[0] = sbr->f_tablelow[0]; - sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]]; - sbr->n_lim = 1; - } -} - -static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext *gb) -{ - unsigned int cnt = get_bits_count(gb); - uint8_t bs_header_extra_1; - uint8_t bs_header_extra_2; - int old_bs_limiter_bands = sbr->bs_limiter_bands; - SpectrumParameters old_spectrum_params; - - sbr->start = 1; - - // Save last spectrum parameters variables to compare to new ones - memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); - - sbr->bs_amp_res_header = get_bits1(gb); - sbr->spectrum_params.bs_start_freq = get_bits(gb, 4); - sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4); - sbr->spectrum_params.bs_xover_band = get_bits(gb, 3); - skip_bits(gb, 2); // bs_reserved - - bs_header_extra_1 = get_bits1(gb); - bs_header_extra_2 = get_bits1(gb); - - if (bs_header_extra_1) { - sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2); - sbr->spectrum_params.bs_alter_scale = get_bits1(gb); - sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2); - } else { - sbr->spectrum_params.bs_freq_scale = 2; - sbr->spectrum_params.bs_alter_scale = 1; - sbr->spectrum_params.bs_noise_bands = 2; - } - - // Check if spectrum parameters changed - if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters))) - sbr->reset = 1; - - if (bs_header_extra_2) { - sbr->bs_limiter_bands = get_bits(gb, 2); - sbr->bs_limiter_gains = get_bits(gb, 2); - sbr->bs_interpol_freq = get_bits1(gb); - sbr->bs_smoothing_mode = get_bits1(gb); - } else { - sbr->bs_limiter_bands = 2; - sbr->bs_limiter_gains = 2; - sbr->bs_interpol_freq = 1; - sbr->bs_smoothing_mode = 1; - } - - if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) - sbr_make_f_tablelim(sbr); - - return get_bits_count(gb) - cnt; -} - -static int array_min_int16(const int16_t *array, int nel) -{ - int i, min = array[0]; - for (i = 1; i < nel; i++) - min = FFMIN(array[i], min); - return min; -} - static void make_bands(int16_t* bands, int start, int stop, int num_bands) { int k, previous, present; @@ -306,823 +67,6 @@ static void make_bands(int16_t* bands, int start, int stop, int num_bands) bands[num_bands-1] = stop - previous; } -static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band) -{ - // Requirements (14496-3 sp04 p205) - if (n_master <= 0) { - av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master); - return -1; - } - if (bs_xover_band >= n_master) { - av_log(avctx, AV_LOG_ERROR, - "Invalid bitstream, crossover band index beyond array bounds: %d\n", - bs_xover_band); - return -1; - } - return 0; -} - -/// Master Frequency Band Table (14496-3 sp04 p194) -static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr, - SpectrumParameters *spectrum) -{ - unsigned int temp, max_qmf_subbands = 0; - unsigned int start_min, stop_min; - int k; - const int8_t *sbr_offset_ptr; - int16_t stop_dk[13]; - - if (sbr->sample_rate < 32000) { - temp = 3000; - } else if (sbr->sample_rate < 64000) { - temp = 4000; - } else - temp = 5000; - - switch (sbr->sample_rate) { - case 16000: - sbr_offset_ptr = sbr_offset[0]; - break; - case 22050: - sbr_offset_ptr = sbr_offset[1]; - break; - case 24000: - sbr_offset_ptr = sbr_offset[2]; - break; - case 32000: - sbr_offset_ptr = sbr_offset[3]; - break; - case 44100: case 48000: case 64000: - sbr_offset_ptr = sbr_offset[4]; - break; - case 88200: case 96000: case 128000: case 176400: case 192000: - sbr_offset_ptr = sbr_offset[5]; - break; - default: - av_log(ac->avctx, AV_LOG_ERROR, - "Unsupported sample rate for SBR: %d\n", sbr->sample_rate); - return -1; - } - - start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate; - stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate; - - sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; - - if (spectrum->bs_stop_freq < 14) { - sbr->k[2] = stop_min; - make_bands(stop_dk, stop_min, 64, 13); - qsort(stop_dk, 13, sizeof(stop_dk[0]), qsort_comparison_function_int16); - for (k = 0; k < spectrum->bs_stop_freq; k++) - sbr->k[2] += stop_dk[k]; - } else if (spectrum->bs_stop_freq == 14) { - sbr->k[2] = 2*sbr->k[0]; - } else if (spectrum->bs_stop_freq == 15) { - sbr->k[2] = 3*sbr->k[0]; - } else { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq); - return -1; - } - sbr->k[2] = FFMIN(64, sbr->k[2]); - - // Requirements (14496-3 sp04 p205) - if (sbr->sample_rate <= 32000) { - max_qmf_subbands = 48; - } else if (sbr->sample_rate == 44100) { - max_qmf_subbands = 35; - } else if (sbr->sample_rate >= 48000) - max_qmf_subbands = 32; - else - av_assert0(0); - - if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]); - return -1; - } - - if (!spectrum->bs_freq_scale) { - int dk, k2diff; - - dk = spectrum->bs_alter_scale + 1; - sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1; - if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) - return -1; - - for (k = 1; k <= sbr->n_master; k++) - sbr->f_master[k] = dk; - - k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk; - if (k2diff < 0) { - sbr->f_master[1]--; - sbr->f_master[2]-= (k2diff < -1); - } else if (k2diff) { - sbr->f_master[sbr->n_master]++; - } - - sbr->f_master[0] = sbr->k[0]; - for (k = 1; k <= sbr->n_master; k++) - sbr->f_master[k] += sbr->f_master[k - 1]; - - } else { - int half_bands = 7 - spectrum->bs_freq_scale; // bs_freq_scale = {1,2,3} - int two_regions, num_bands_0; - int vdk0_max, vdk1_min; - int16_t vk0[49]; - - if (49 * sbr->k[2] > 110 * sbr->k[0]) { - two_regions = 1; - sbr->k[1] = 2 * sbr->k[0]; - } else { - two_regions = 0; - sbr->k[1] = sbr->k[2]; - } - - num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2; - - if (num_bands_0 <= 0) { // Requirements (14496-3 sp04 p205) - av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0); - return -1; - } - - vk0[0] = 0; - - make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0); - - qsort(vk0 + 1, num_bands_0, sizeof(vk0[1]), qsort_comparison_function_int16); - vdk0_max = vk0[num_bands_0]; - - vk0[0] = sbr->k[0]; - for (k = 1; k <= num_bands_0; k++) { - if (vk0[k] <= 0) { // Requirements (14496-3 sp04 p205) - av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]); - return -1; - } - vk0[k] += vk0[k-1]; - } - - if (two_regions) { - int16_t vk1[49]; - float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f - : 1.0f; // bs_alter_scale = {0,1} - int num_bands_1 = lrintf(half_bands * invwarp * - log2f(sbr->k[2] / (float)sbr->k[1])) * 2; - - make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1); - - vdk1_min = array_min_int16(vk1 + 1, num_bands_1); - - if (vdk1_min < vdk0_max) { - int change; - qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); - change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1); - vk1[1] += change; - vk1[num_bands_1] -= change; - } - - qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); - - vk1[0] = sbr->k[1]; - for (k = 1; k <= num_bands_1; k++) { - if (vk1[k] <= 0) { // Requirements (14496-3 sp04 p205) - av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]); - return -1; - } - vk1[k] += vk1[k-1]; - } - - sbr->n_master = num_bands_0 + num_bands_1; - if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) - return -1; - memcpy(&sbr->f_master[0], vk0, - (num_bands_0 + 1) * sizeof(sbr->f_master[0])); - memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1, - num_bands_1 * sizeof(sbr->f_master[0])); - - } else { - sbr->n_master = num_bands_0; - if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) - return -1; - memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0])); - } - } - - return 0; -} - -/// High Frequency Generation - Patch Construction (14496-3 sp04 p216 fig. 4.46) -static int sbr_hf_calc_npatches(AACContext *ac, SpectralBandReplication *sbr) -{ - int i, k, last_k = -1, last_msb = -1, sb = 0; - int msb = sbr->k[0]; - int usb = sbr->kx[1]; - int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate; - - sbr->num_patches = 0; - - if (goal_sb < sbr->kx[1] + sbr->m[1]) { - for (k = 0; sbr->f_master[k] < goal_sb; k++) ; - } else - k = sbr->n_master; - - do { - int odd = 0; - if (k == last_k && msb == last_msb) { - av_log(ac->avctx, AV_LOG_ERROR, "patch construction failed\n"); - return AVERROR_INVALIDDATA; - } - last_k = k; - last_msb = msb; - for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) { - sb = sbr->f_master[i]; - odd = (sb + sbr->k[0]) & 1; - } - - // Requirements (14496-3 sp04 p205) sets the maximum number of patches to 5. - // After this check the final number of patches can still be six which is - // illegal however the Coding Technologies decoder check stream has a final - // count of 6 patches - if (sbr->num_patches > 5) { - av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches); - return -1; - } - - sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0); - sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches]; - - if (sbr->patch_num_subbands[sbr->num_patches] > 0) { - usb = sb; - msb = sb; - sbr->num_patches++; - } else - msb = sbr->kx[1]; - - if (sbr->f_master[k] - sb < 3) - k = sbr->n_master; - } while (sb != sbr->kx[1] + sbr->m[1]); - - if (sbr->num_patches > 1 && - sbr->patch_num_subbands[sbr->num_patches - 1] < 3) - sbr->num_patches--; - - return 0; -} - -/// Derived Frequency Band Tables (14496-3 sp04 p197) -static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr) -{ - int k, temp; - - sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band; - sbr->n[0] = (sbr->n[1] + 1) >> 1; - - memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band], - (sbr->n[1] + 1) * sizeof(sbr->f_master[0])); - sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0]; - sbr->kx[1] = sbr->f_tablehigh[0]; - - // Requirements (14496-3 sp04 p205) - if (sbr->kx[1] + sbr->m[1] > 64) { - av_log(ac->avctx, AV_LOG_ERROR, - "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]); - return -1; - } - if (sbr->kx[1] > 32) { - av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]); - return -1; - } - - sbr->f_tablelow[0] = sbr->f_tablehigh[0]; - temp = sbr->n[1] & 1; - for (k = 1; k <= sbr->n[0]; k++) - sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp]; - - sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands * - log2f(sbr->k[2] / (float)sbr->kx[1]))); // 0 <= bs_noise_bands <= 3 - if (sbr->n_q > 5) { - av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q); - return -1; - } - - sbr->f_tablenoise[0] = sbr->f_tablelow[0]; - temp = 0; - for (k = 1; k <= sbr->n_q; k++) { - temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k); - sbr->f_tablenoise[k] = sbr->f_tablelow[temp]; - } - - if (sbr_hf_calc_npatches(ac, sbr) < 0) - return -1; - - sbr_make_f_tablelim(sbr); - - sbr->data[0].f_indexnoise = 0; - sbr->data[1].f_indexnoise = 0; - - return 0; -} - -static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec, - int elements) -{ - int i; - for (i = 0; i < elements; i++) { - vec[i] = get_bits1(gb); - } -} - -/** ceil(log2(index+1)) */ -static const int8_t ceil_log2[] = { - 0, 1, 2, 2, 3, 3, -}; - -static int read_sbr_grid(AACContext *ac, SpectralBandReplication *sbr, - GetBitContext *gb, SBRData *ch_data) -{ - int i; - int bs_pointer = 0; - // frameLengthFlag ? 15 : 16; 960 sample length frames unsupported; this value is numTimeSlots - int abs_bord_trail = 16; - int num_rel_lead, num_rel_trail; - unsigned bs_num_env_old = ch_data->bs_num_env; - - ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env]; - ch_data->bs_amp_res = sbr->bs_amp_res_header; - ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old]; - - switch (ch_data->bs_frame_class = get_bits(gb, 2)) { - case FIXFIX: - ch_data->bs_num_env = 1 << get_bits(gb, 2); - num_rel_lead = ch_data->bs_num_env - 1; - if (ch_data->bs_num_env == 1) - ch_data->bs_amp_res = 0; - - if (ch_data->bs_num_env > 4) { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n", - ch_data->bs_num_env); - return -1; - } - - ch_data->t_env[0] = 0; - ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; - - abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) / - ch_data->bs_num_env; - for (i = 0; i < num_rel_lead; i++) - ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail; - - ch_data->bs_freq_res[1] = get_bits1(gb); - for (i = 1; i < ch_data->bs_num_env; i++) - ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1]; - break; - case FIXVAR: - abs_bord_trail += get_bits(gb, 2); - num_rel_trail = get_bits(gb, 2); - ch_data->bs_num_env = num_rel_trail + 1; - ch_data->t_env[0] = 0; - ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; - - for (i = 0; i < num_rel_trail; i++) - ch_data->t_env[ch_data->bs_num_env - 1 - i] = - ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; - - bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); - - for (i = 0; i < ch_data->bs_num_env; i++) - ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb); - break; - case VARFIX: - ch_data->t_env[0] = get_bits(gb, 2); - num_rel_lead = get_bits(gb, 2); - ch_data->bs_num_env = num_rel_lead + 1; - ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; - - for (i = 0; i < num_rel_lead; i++) - ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; - - bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); - - get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); - break; - case VARVAR: - ch_data->t_env[0] = get_bits(gb, 2); - abs_bord_trail += get_bits(gb, 2); - num_rel_lead = get_bits(gb, 2); - num_rel_trail = get_bits(gb, 2); - ch_data->bs_num_env = num_rel_lead + num_rel_trail + 1; - - if (ch_data->bs_num_env > 5) { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n", - ch_data->bs_num_env); - return -1; - } - - ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; - - for (i = 0; i < num_rel_lead; i++) - ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; - for (i = 0; i < num_rel_trail; i++) - ch_data->t_env[ch_data->bs_num_env - 1 - i] = - ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; - - bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); - - get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); - break; - } - - av_assert0(bs_pointer >= 0); - if (bs_pointer > ch_data->bs_num_env + 1) { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n", - bs_pointer); - return -1; - } - - for (i = 1; i <= ch_data->bs_num_env; i++) { - if (ch_data->t_env[i-1] > ch_data->t_env[i]) { - av_log(ac->avctx, AV_LOG_ERROR, "Non monotone time borders\n"); - return -1; - } - } - - ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1; - - ch_data->t_q[0] = ch_data->t_env[0]; - ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env]; - if (ch_data->bs_num_noise > 1) { - int idx; - if (ch_data->bs_frame_class == FIXFIX) { - idx = ch_data->bs_num_env >> 1; - } else if (ch_data->bs_frame_class & 1) { // FIXVAR or VARVAR - idx = ch_data->bs_num_env - FFMAX(bs_pointer - 1, 1); - } else { // VARFIX - if (!bs_pointer) - idx = 1; - else if (bs_pointer == 1) - idx = ch_data->bs_num_env - 1; - else // bs_pointer > 1 - idx = bs_pointer - 1; - } - ch_data->t_q[1] = ch_data->t_env[idx]; - } - - ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old); // l_APrev - ch_data->e_a[1] = -1; - if ((ch_data->bs_frame_class & 1) && bs_pointer) { // FIXVAR or VARVAR and bs_pointer != 0 - ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer; - } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1)) // VARFIX and bs_pointer > 1 - ch_data->e_a[1] = bs_pointer - 1; - - return 0; -} - -static void copy_sbr_grid(SBRData *dst, const SBRData *src) { - //These variables are saved from the previous frame rather than copied - dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env]; - dst->t_env_num_env_old = dst->t_env[dst->bs_num_env]; - dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env); - - //These variables are read from the bitstream and therefore copied - memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res)); - memcpy(dst->t_env, src->t_env, sizeof(dst->t_env)); - memcpy(dst->t_q, src->t_q, sizeof(dst->t_q)); - dst->bs_num_env = src->bs_num_env; - dst->bs_amp_res = src->bs_amp_res; - dst->bs_num_noise = src->bs_num_noise; - dst->bs_frame_class = src->bs_frame_class; - dst->e_a[1] = src->e_a[1]; -} - -/// Read how the envelope and noise floor data is delta coded -static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb, - SBRData *ch_data) -{ - get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); - get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); -} - -/// Read inverse filtering data -static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb, - SBRData *ch_data) -{ - int i; - - memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t)); - for (i = 0; i < sbr->n_q; i++) - ch_data->bs_invf_mode[0][i] = get_bits(gb, 2); -} - -static void read_sbr_envelope(SpectralBandReplication *sbr, GetBitContext *gb, - SBRData *ch_data, int ch) -{ - int bits; - int i, j, k; - VLC_TYPE (*t_huff)[2], (*f_huff)[2]; - int t_lav, f_lav; - const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; - const int odd = sbr->n[1] & 1; - - if (sbr->bs_coupling && ch) { - if (ch_data->bs_amp_res) { - bits = 5; - t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_3_0DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_3_0DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; - } else { - bits = 6; - t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_1_5DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_1_5DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_1_5DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_1_5DB]; - } - } else { - if (ch_data->bs_amp_res) { - bits = 6; - t_huff = vlc_sbr[T_HUFFMAN_ENV_3_0DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_3_0DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; - } else { - bits = 7; - t_huff = vlc_sbr[T_HUFFMAN_ENV_1_5DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_1_5DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_1_5DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_1_5DB]; - } - } - - for (i = 0; i < ch_data->bs_num_env; i++) { - if (ch_data->bs_df_env[i]) { - // bs_freq_res[0] == bs_freq_res[bs_num_env] from prev frame - if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) { - for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) - ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); - } else if (ch_data->bs_freq_res[i + 1]) { - for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { - k = (j + odd) >> 1; // find k such that f_tablelow[k] <= f_tablehigh[j] < f_tablelow[k + 1] - ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); - } - } else { - for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { - k = j ? 2*j - odd : 0; // find k such that f_tablehigh[k] == f_tablelow[j] - ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); - } - } - } else { - ch_data->env_facs[i + 1][0] = delta * get_bits(gb, bits); // bs_env_start_value_balance - for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) - ch_data->env_facs[i + 1][j] = ch_data->env_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); - } - } - - //assign 0th elements of env_facs from last elements - memcpy(ch_data->env_facs[0], ch_data->env_facs[ch_data->bs_num_env], - sizeof(ch_data->env_facs[0])); -} - -static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb, - SBRData *ch_data, int ch) -{ - int i, j; - VLC_TYPE (*t_huff)[2], (*f_huff)[2]; - int t_lav, f_lav; - int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; - - if (sbr->bs_coupling && ch) { - t_huff = vlc_sbr[T_HUFFMAN_NOISE_BAL_3_0DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_BAL_3_0DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; - } else { - t_huff = vlc_sbr[T_HUFFMAN_NOISE_3_0DB].table; - t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_3_0DB]; - f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; - f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; - } - - for (i = 0; i < ch_data->bs_num_noise; i++) { - if (ch_data->bs_df_noise[i]) { - for (j = 0; j < sbr->n_q; j++) - ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav); - } else { - ch_data->noise_facs[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level - for (j = 1; j < sbr->n_q; j++) - ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); - } - } - - //assign 0th elements of noise_facs from last elements - memcpy(ch_data->noise_facs[0], ch_data->noise_facs[ch_data->bs_num_noise], - sizeof(ch_data->noise_facs[0])); -} - -static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, - GetBitContext *gb, - int bs_extension_id, int *num_bits_left) -{ - switch (bs_extension_id) { - case EXTENSION_ID_PS: - if (!ac->oc[1].m4ac.ps) { - av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n"); - skip_bits_long(gb, *num_bits_left); // bs_fill_bits - *num_bits_left = 0; - } else { -#if 1 - *num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps, *num_bits_left); - ac->avctx->profile = FF_PROFILE_AAC_HE_V2; -#else - avpriv_report_missing_feature(ac->avctx, "Parametric Stereo"); - skip_bits_long(gb, *num_bits_left); // bs_fill_bits - *num_bits_left = 0; -#endif - } - break; - default: - // some files contain 0-padding - if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left)) - avpriv_request_sample(ac->avctx, "Reserved SBR extensions"); - skip_bits_long(gb, *num_bits_left); // bs_fill_bits - *num_bits_left = 0; - break; - } -} - -static int read_sbr_single_channel_element(AACContext *ac, - SpectralBandReplication *sbr, - GetBitContext *gb) -{ - if (get_bits1(gb)) // bs_data_extra - skip_bits(gb, 4); // bs_reserved - - if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) - return -1; - read_sbr_dtdf(sbr, gb, &sbr->data[0]); - read_sbr_invf(sbr, gb, &sbr->data[0]); - read_sbr_envelope(sbr, gb, &sbr->data[0], 0); - read_sbr_noise(sbr, gb, &sbr->data[0], 0); - - if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) - get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); - - return 0; -} - -static int read_sbr_channel_pair_element(AACContext *ac, - SpectralBandReplication *sbr, - GetBitContext *gb) -{ - if (get_bits1(gb)) // bs_data_extra - skip_bits(gb, 8); // bs_reserved - - if ((sbr->bs_coupling = get_bits1(gb))) { - if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) - return -1; - copy_sbr_grid(&sbr->data[1], &sbr->data[0]); - read_sbr_dtdf(sbr, gb, &sbr->data[0]); - read_sbr_dtdf(sbr, gb, &sbr->data[1]); - read_sbr_invf(sbr, gb, &sbr->data[0]); - memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); - memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); - read_sbr_envelope(sbr, gb, &sbr->data[0], 0); - read_sbr_noise(sbr, gb, &sbr->data[0], 0); - read_sbr_envelope(sbr, gb, &sbr->data[1], 1); - read_sbr_noise(sbr, gb, &sbr->data[1], 1); - } else { - if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) || - read_sbr_grid(ac, sbr, gb, &sbr->data[1])) - return -1; - read_sbr_dtdf(sbr, gb, &sbr->data[0]); - read_sbr_dtdf(sbr, gb, &sbr->data[1]); - read_sbr_invf(sbr, gb, &sbr->data[0]); - read_sbr_invf(sbr, gb, &sbr->data[1]); - read_sbr_envelope(sbr, gb, &sbr->data[0], 0); - read_sbr_envelope(sbr, gb, &sbr->data[1], 1); - read_sbr_noise(sbr, gb, &sbr->data[0], 0); - read_sbr_noise(sbr, gb, &sbr->data[1], 1); - } - - if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) - get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); - if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) - get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); - - return 0; -} - -static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr, - GetBitContext *gb, int id_aac) -{ - unsigned int cnt = get_bits_count(gb); - - sbr->id_aac = id_aac; - - if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { - if (read_sbr_single_channel_element(ac, sbr, gb)) { - sbr_turnoff(sbr); - return get_bits_count(gb) - cnt; - } - } else if (id_aac == TYPE_CPE) { - if (read_sbr_channel_pair_element(ac, sbr, gb)) { - sbr_turnoff(sbr); - return get_bits_count(gb) - cnt; - } - } else { - av_log(ac->avctx, AV_LOG_ERROR, - "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac); - sbr_turnoff(sbr); - return get_bits_count(gb) - cnt; - } - if (get_bits1(gb)) { // bs_extended_data - int num_bits_left = get_bits(gb, 4); // bs_extension_size - if (num_bits_left == 15) - num_bits_left += get_bits(gb, 8); // bs_esc_count - - num_bits_left <<= 3; - while (num_bits_left > 7) { - num_bits_left -= 2; - read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left); // bs_extension_id - } - if (num_bits_left < 0) { - av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n"); - } - if (num_bits_left > 0) - skip_bits(gb, num_bits_left); - } - - return get_bits_count(gb) - cnt; -} - -static void sbr_reset(AACContext *ac, SpectralBandReplication *sbr) -{ - int err; - err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params); - if (err >= 0) - err = sbr_make_f_derived(ac, sbr); - if (err < 0) { - av_log(ac->avctx, AV_LOG_ERROR, - "SBR reset failed. Switching SBR to pure upsampling mode.\n"); - sbr_turnoff(sbr); - } -} - -/** - * Decode Spectral Band Replication extension data; reference: table 4.55. - * - * @param crc flag indicating the presence of CRC checksum - * @param cnt length of TYPE_FIL syntactic element in bytes - * - * @return Returns number of bytes consumed from the TYPE_FIL element. - */ -int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, - GetBitContext *gb_host, int crc, int cnt, int id_aac) -{ - unsigned int num_sbr_bits = 0, num_align_bits; - unsigned bytes_read; - GetBitContext gbc = *gb_host, *gb = &gbc; - skip_bits_long(gb_host, cnt*8 - 4); - - sbr->reset = 0; - - if (!sbr->sample_rate) - sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support - if (!ac->oc[1].m4ac.ext_sample_rate) - ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate; - - if (crc) { - skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check - num_sbr_bits += 10; - } - - //Save some state from the previous frame. - sbr->kx[0] = sbr->kx[1]; - sbr->m[0] = sbr->m[1]; - sbr->kx_and_m_pushed = 1; - - num_sbr_bits++; - if (get_bits1(gb)) // bs_header_flag - num_sbr_bits += read_sbr_header(sbr, gb); - - if (sbr->reset) - sbr_reset(ac, sbr); - - if (sbr->start) - num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac); - - num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7; - bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3); - - if (bytes_read > cnt) { - av_log(ac->avctx, AV_LOG_ERROR, - "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read); - } - return cnt; -} - /// Dequantization and stereo decoding (14496-3 sp04 p203) static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) { @@ -1181,84 +125,6 @@ static void sbr_dequant(SpectralBandReplication *sbr, int id_aac) } } -/** - * Analysis QMF Bank (14496-3 sp04 p206) - * - * @param x pointer to the beginning of the first sample window - * @param W array of complex-valued samples split into subbands - */ -#ifndef sbr_qmf_analysis -static void sbr_qmf_analysis(AVFloatDSPContext *dsp, FFTContext *mdct, - SBRDSPContext *sbrdsp, const float *in, float *x, - float z[320], float W[2][32][32][2], int buf_idx) -{ - int i; - memcpy(x , x+1024, (320-32)*sizeof(x[0])); - memcpy(x+288, in, 1024*sizeof(x[0])); - for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames - // are not supported - dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320); - sbrdsp->sum64x5(z); - sbrdsp->qmf_pre_shuffle(z); - mdct->imdct_half(mdct, z, z+64); - sbrdsp->qmf_post_shuffle(W[buf_idx][i], z); - x += 32; - } -} -#endif - -/** - * Synthesis QMF Bank (14496-3 sp04 p206) and Downsampled Synthesis QMF Bank - * (14496-3 sp04 p206) - */ -#ifndef sbr_qmf_synthesis -static void sbr_qmf_synthesis(FFTContext *mdct, - SBRDSPContext *sbrdsp, AVFloatDSPContext *dsp, - float *out, float X[2][38][64], - float mdct_buf[2][64], - float *v0, int *v_off, const unsigned int div) -{ - int i, n; - const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us; - const int step = 128 >> div; - float *v; - for (i = 0; i < 32; i++) { - if (*v_off < step) { - int saved_samples = (1280 - 128) >> div; - memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float)); - *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step; - } else { - *v_off -= step; - } - v = v0 + *v_off; - if (div) { - for (n = 0; n < 32; n++) { - X[0][i][ n] = -X[0][i][n]; - X[0][i][32+n] = X[1][i][31-n]; - } - mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); - sbrdsp->qmf_deint_neg(v, mdct_buf[0]); - } else { - sbrdsp->neg_odd_64(X[1][i]); - mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); - mdct->imdct_half(mdct, mdct_buf[1], X[1][i]); - sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]); - } - dsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div); - dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div); - dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div); - out += 64 >> div; - } -} -#endif - /** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering * (14496-3 sp04 p214) * Warning: This routine does not seem numerically stable. @@ -1338,203 +204,6 @@ static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data) } } -/// Generate the subband filtered lowband -static int sbr_lf_gen(AACContext *ac, SpectralBandReplication *sbr, - float X_low[32][40][2], const float W[2][32][32][2], - int buf_idx) -{ - int i, k; - const int t_HFGen = 8; - const int i_f = 32; - memset(X_low, 0, 32*sizeof(*X_low)); - for (k = 0; k < sbr->kx[1]; k++) { - for (i = t_HFGen; i < i_f + t_HFGen; i++) { - X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0]; - X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1]; - } - } - buf_idx = 1-buf_idx; - for (k = 0; k < sbr->kx[0]; k++) { - for (i = 0; i < t_HFGen; i++) { - X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0]; - X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1]; - } - } - return 0; -} - -/// High Frequency Generator (14496-3 sp04 p215) -static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr, - float X_high[64][40][2], const float X_low[32][40][2], - const float (*alpha0)[2], const float (*alpha1)[2], - const float bw_array[5], const uint8_t *t_env, - int bs_num_env) -{ - int j, x; - int g = 0; - int k = sbr->kx[1]; - for (j = 0; j < sbr->num_patches; j++) { - for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) { - const int p = sbr->patch_start_subband[j] + x; - while (g <= sbr->n_q && k >= sbr->f_tablenoise[g]) - g++; - g--; - - if (g < 0) { - av_log(ac->avctx, AV_LOG_ERROR, - "ERROR : no subband found for frequency %d\n", k); - return -1; - } - - sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET, - X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET, - alpha0[p], alpha1[p], bw_array[g], - 2 * t_env[0], 2 * t_env[bs_num_env]); - } - } - if (k < sbr->m[1] + sbr->kx[1]) - memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high)); - - return 0; -} - -/// Generate the subband filtered lowband -static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64], - const float Y0[38][64][2], const float Y1[38][64][2], - const float X_low[32][40][2], int ch) -{ - int k, i; - const int i_f = 32; - const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0); - memset(X, 0, 2*sizeof(*X)); - for (k = 0; k < sbr->kx[0]; k++) { - for (i = 0; i < i_Temp; i++) { - X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; - X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; - } - } - for (; k < sbr->kx[0] + sbr->m[0]; k++) { - for (i = 0; i < i_Temp; i++) { - X[0][i][k] = Y0[i + i_f][k][0]; - X[1][i][k] = Y0[i + i_f][k][1]; - } - } - - for (k = 0; k < sbr->kx[1]; k++) { - for (i = i_Temp; i < 38; i++) { - X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; - X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; - } - } - for (; k < sbr->kx[1] + sbr->m[1]; k++) { - for (i = i_Temp; i < i_f; i++) { - X[0][i][k] = Y1[i][k][0]; - X[1][i][k] = Y1[i][k][1]; - } - } - return 0; -} - -/** High Frequency Adjustment (14496-3 sp04 p217) and Mapping - * (14496-3 sp04 p217) - */ -static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, - SBRData *ch_data, int e_a[2]) -{ - int e, i, m; - - memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1])); - for (e = 0; e < ch_data->bs_num_env; e++) { - const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]]; - uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; - int k; - - if (sbr->kx[1] != table[0]) { - av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. " - "Derived frequency tables were not regenerated.\n"); - sbr_turnoff(sbr); - return AVERROR_BUG; - } - for (i = 0; i < ilim; i++) - for (m = table[i]; m < table[i + 1]; m++) - sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i]; - - // ch_data->bs_num_noise > 1 => 2 noise floors - k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]); - for (i = 0; i < sbr->n_q; i++) - for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++) - sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i]; - - for (i = 0; i < sbr->n[1]; i++) { - if (ch_data->bs_add_harmonic_flag) { - const unsigned int m_midpoint = - (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1; - - ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] * - (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1)); - } - } - - for (i = 0; i < ilim; i++) { - int additional_sinusoid_present = 0; - for (m = table[i]; m < table[i + 1]; m++) { - if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) { - additional_sinusoid_present = 1; - break; - } - } - memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present, - (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0])); - } - } - - memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0])); - return 0; -} - -/// Estimation of current envelope (14496-3 sp04 p218) -static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2], - SpectralBandReplication *sbr, SBRData *ch_data) -{ - int e, m; - int kx1 = sbr->kx[1]; - - if (sbr->bs_interpol_freq) { - for (e = 0; e < ch_data->bs_num_env; e++) { - const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]); - int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; - int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; - - for (m = 0; m < sbr->m[1]; m++) { - float sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb); - e_curr[e][m] = sum * recip_env_size; - } - } - } else { - int k, p; - - for (e = 0; e < ch_data->bs_num_env; e++) { - const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]); - int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; - int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; - const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; - - for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) { - float sum = 0.0f; - const int den = env_size * (table[p + 1] - table[p]); - - for (k = table[p]; k < table[p + 1]; k++) { - sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb); - } - sum /= den; - for (k = table[p]; k < table[p + 1]; k++) { - e_curr[e][k - kx1] = sum; - } - } - } - } -} - /** * Calculation of levels of additional HF signal components (14496-3 sp04 p219) * and Calculation of gain (14496-3 sp04 p219) @@ -1689,99 +358,4 @@ static void sbr_hf_assemble(float Y1[38][64][2], ch_data->f_indexsine = indexsine; } -void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, - float* L, float* R) -{ - int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate; - int ch; - int nch = (id_aac == TYPE_CPE) ? 2 : 1; - int err; - - if (id_aac != sbr->id_aac) { - av_log(ac->avctx, AV_LOG_ERROR, - "element type mismatch %d != %d\n", id_aac, sbr->id_aac); - sbr_turnoff(sbr); - } - - if (!sbr->kx_and_m_pushed) { - sbr->kx[0] = sbr->kx[1]; - sbr->m[0] = sbr->m[1]; - } else { - sbr->kx_and_m_pushed = 0; - } - - if (sbr->start) { - sbr_dequant(sbr, id_aac); - } - for (ch = 0; ch < nch; ch++) { - /* decode channel */ - sbr_qmf_analysis(ac->fdsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples, - (float*)sbr->qmf_filter_scratch, - sbr->data[ch].W, sbr->data[ch].Ypos); - sbr->c.sbr_lf_gen(ac, sbr, sbr->X_low, - (const float (*)[32][32][2]) sbr->data[ch].W, - sbr->data[ch].Ypos); - sbr->data[ch].Ypos ^= 1; - if (sbr->start) { - sbr->c.sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, - (const float (*)[40][2]) sbr->X_low, sbr->k[0]); - sbr_chirp(sbr, &sbr->data[ch]); - av_assert0(sbr->data[ch].bs_num_env > 0); - sbr_hf_gen(ac, sbr, sbr->X_high, - (const float (*)[40][2]) sbr->X_low, - (const float (*)[2]) sbr->alpha0, - (const float (*)[2]) sbr->alpha1, - sbr->data[ch].bw_array, sbr->data[ch].t_env, - sbr->data[ch].bs_num_env); - - // hf_adj - err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); - if (!err) { - sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]); - sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); - sbr->c.sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos], - (const float (*)[40][2]) sbr->X_high, - sbr, &sbr->data[ch], - sbr->data[ch].e_a); - } - } - - /* synthesis */ - sbr->c.sbr_x_gen(sbr, sbr->X[ch], - (const float (*)[64][2]) sbr->data[ch].Y[1-sbr->data[ch].Ypos], - (const float (*)[64][2]) sbr->data[ch].Y[ sbr->data[ch].Ypos], - (const float (*)[40][2]) sbr->X_low, ch); - } - - if (ac->oc[1].m4ac.ps == 1) { - if (sbr->ps.start) { - ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); - } else { - memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); - } - nch = 2; - } - - sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, - L, sbr->X[0], sbr->qmf_filter_scratch, - sbr->data[0].synthesis_filterbank_samples, - &sbr->data[0].synthesis_filterbank_samples_offset, - downsampled); - if (nch == 2) - sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, - R, sbr->X[1], sbr->qmf_filter_scratch, - sbr->data[1].synthesis_filterbank_samples, - &sbr->data[1].synthesis_filterbank_samples_offset, - downsampled); -} - -static void aacsbr_func_ptr_init(AACSBRContext *c) -{ - c->sbr_lf_gen = sbr_lf_gen; - c->sbr_hf_assemble = sbr_hf_assemble; - c->sbr_x_gen = sbr_x_gen; - c->sbr_hf_inverse_filter = sbr_hf_inverse_filter; - - if(ARCH_MIPS) - ff_aacsbr_func_ptr_init_mips(c); -} +#include "aacsbr_template.c" diff --git a/libavcodec/aacsbr.h b/libavcodec/aacsbr.h index f5e33ab688..476bc65c54 100644 --- a/libavcodec/aacsbr.h +++ b/libavcodec/aacsbr.h @@ -33,6 +33,51 @@ #include "aac.h" #include "sbr.h" +#define ENVELOPE_ADJUSTMENT_OFFSET 2 +#define NOISE_FLOOR_OFFSET FIXR(6.0f) + +/** + * SBR VLC tables + */ +enum { + T_HUFFMAN_ENV_1_5DB, + F_HUFFMAN_ENV_1_5DB, + T_HUFFMAN_ENV_BAL_1_5DB, + F_HUFFMAN_ENV_BAL_1_5DB, + T_HUFFMAN_ENV_3_0DB, + F_HUFFMAN_ENV_3_0DB, + T_HUFFMAN_ENV_BAL_3_0DB, + F_HUFFMAN_ENV_BAL_3_0DB, + T_HUFFMAN_NOISE_3_0DB, + T_HUFFMAN_NOISE_BAL_3_0DB, +}; + +/** + * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) + */ +enum { + FIXFIX, + FIXVAR, + VARFIX, + VARVAR, +}; + +enum { + EXTENSION_ID_PS = 2, +}; + +static const int8_t vlc_sbr_lav[10] = + { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 }; + +#define SBR_INIT_VLC_STATIC(num, size) \ + INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \ + sbr_tmp[num].sbr_bits , 1, 1, \ + sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \ + size) + +#define SBR_VLC_ROW(name) \ + { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) } + /** Initialize SBR. */ void ff_aac_sbr_init(void); /** Initialize one SBR context. */ diff --git a/libavcodec/aacsbr_template.c b/libavcodec/aacsbr_template.c new file mode 100644 index 0000000000..a176078880 --- /dev/null +++ b/libavcodec/aacsbr_template.c @@ -0,0 +1,1410 @@ +/* + * AAC Spectral Band Replication decoding functions + * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) + * Copyright (c) 2009-2010 Alex Converse + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * AAC Spectral Band Replication decoding functions + * @author Robert Swain ( rob opendot cl ) + */ + +av_cold void ff_aac_sbr_init(void) +{ + static const struct { + const void *sbr_codes, *sbr_bits; + const unsigned int table_size, elem_size; + } sbr_tmp[] = { + SBR_VLC_ROW(t_huffman_env_1_5dB), + SBR_VLC_ROW(f_huffman_env_1_5dB), + SBR_VLC_ROW(t_huffman_env_bal_1_5dB), + SBR_VLC_ROW(f_huffman_env_bal_1_5dB), + SBR_VLC_ROW(t_huffman_env_3_0dB), + SBR_VLC_ROW(f_huffman_env_3_0dB), + SBR_VLC_ROW(t_huffman_env_bal_3_0dB), + SBR_VLC_ROW(f_huffman_env_bal_3_0dB), + SBR_VLC_ROW(t_huffman_noise_3_0dB), + SBR_VLC_ROW(t_huffman_noise_bal_3_0dB), + }; + + // SBR VLC table initialization + SBR_INIT_VLC_STATIC(0, 1098); + SBR_INIT_VLC_STATIC(1, 1092); + SBR_INIT_VLC_STATIC(2, 768); + SBR_INIT_VLC_STATIC(3, 1026); + SBR_INIT_VLC_STATIC(4, 1058); + SBR_INIT_VLC_STATIC(5, 1052); + SBR_INIT_VLC_STATIC(6, 544); + SBR_INIT_VLC_STATIC(7, 544); + SBR_INIT_VLC_STATIC(8, 592); + SBR_INIT_VLC_STATIC(9, 512); + + aacsbr_tableinit(); + + ff_ps_init(); +} + +/** Places SBR in pure upsampling mode. */ +static void sbr_turnoff(SpectralBandReplication *sbr) { + sbr->start = 0; + // Init defults used in pure upsampling mode + sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 + sbr->m[1] = 0; + // Reset values for first SBR header + sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1; + memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters)); +} + +av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr) +{ + if(sbr->mdct.mdct_bits) + return; + sbr->kx[0] = sbr->kx[1]; + sbr_turnoff(sbr); + sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); + sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); + /* SBR requires samples to be scaled to +/-32768.0 to work correctly. + * mdct scale factors are adjusted to scale up from +/-1.0 at analysis + * and scale back down at synthesis. */ + ff_mdct_init(&sbr->mdct, 7, 1, 1.0 / (64 * 32768.0)); + ff_mdct_init(&sbr->mdct_ana, 7, 1, -2.0 * 32768.0); + ff_ps_ctx_init(&sbr->ps); + ff_sbrdsp_init(&sbr->dsp); + aacsbr_func_ptr_init(&sbr->c); +} + +av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr) +{ + ff_mdct_end(&sbr->mdct); + ff_mdct_end(&sbr->mdct_ana); +} + +static int qsort_comparison_function_int16(const void *a, const void *b) +{ + return *(const int16_t *)a - *(const int16_t *)b; +} + +static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle) +{ + int i; + for (i = 0; i <= last_el; i++) + if (table[i] == needle) + return 1; + return 0; +} + +/// Limiter Frequency Band Table (14496-3 sp04 p198) +static void sbr_make_f_tablelim(SpectralBandReplication *sbr) +{ + int k; + if (sbr->bs_limiter_bands > 0) { + static const float bands_warped[3] = { 1.32715174233856803909f, //2^(0.49/1.2) + 1.18509277094158210129f, //2^(0.49/2) + 1.11987160404675912501f }; //2^(0.49/3) + const float lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1]; + int16_t patch_borders[7]; + uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim; + + patch_borders[0] = sbr->kx[1]; + for (k = 1; k <= sbr->num_patches; k++) + patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1]; + + memcpy(sbr->f_tablelim, sbr->f_tablelow, + (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0])); + if (sbr->num_patches > 1) + memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1, + (sbr->num_patches - 1) * sizeof(patch_borders[0])); + + qsort(sbr->f_tablelim, sbr->num_patches + sbr->n[0], + sizeof(sbr->f_tablelim[0]), + qsort_comparison_function_int16); + + sbr->n_lim = sbr->n[0] + sbr->num_patches - 1; + while (out < sbr->f_tablelim + sbr->n_lim) { + if (*in >= *out * lim_bands_per_octave_warped) { + *++out = *in++; + } else if (*in == *out || + !in_table_int16(patch_borders, sbr->num_patches, *in)) { + in++; + sbr->n_lim--; + } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) { + *out = *in++; + sbr->n_lim--; + } else { + *++out = *in++; + } + } + } else { + sbr->f_tablelim[0] = sbr->f_tablelow[0]; + sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]]; + sbr->n_lim = 1; + } +} + +static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext *gb) +{ + unsigned int cnt = get_bits_count(gb); + uint8_t bs_header_extra_1; + uint8_t bs_header_extra_2; + int old_bs_limiter_bands = sbr->bs_limiter_bands; + SpectrumParameters old_spectrum_params; + + sbr->start = 1; + + // Save last spectrum parameters variables to compare to new ones + memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); + + sbr->bs_amp_res_header = get_bits1(gb); + sbr->spectrum_params.bs_start_freq = get_bits(gb, 4); + sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4); + sbr->spectrum_params.bs_xover_band = get_bits(gb, 3); + skip_bits(gb, 2); // bs_reserved + + bs_header_extra_1 = get_bits1(gb); + bs_header_extra_2 = get_bits1(gb); + + if (bs_header_extra_1) { + sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2); + sbr->spectrum_params.bs_alter_scale = get_bits1(gb); + sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2); + } else { + sbr->spectrum_params.bs_freq_scale = 2; + sbr->spectrum_params.bs_alter_scale = 1; + sbr->spectrum_params.bs_noise_bands = 2; + } + + // Check if spectrum parameters changed + if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters))) + sbr->reset = 1; + + if (bs_header_extra_2) { + sbr->bs_limiter_bands = get_bits(gb, 2); + sbr->bs_limiter_gains = get_bits(gb, 2); + sbr->bs_interpol_freq = get_bits1(gb); + sbr->bs_smoothing_mode = get_bits1(gb); + } else { + sbr->bs_limiter_bands = 2; + sbr->bs_limiter_gains = 2; + sbr->bs_interpol_freq = 1; + sbr->bs_smoothing_mode = 1; + } + + if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) + sbr_make_f_tablelim(sbr); + + return get_bits_count(gb) - cnt; +} + +static int array_min_int16(const int16_t *array, int nel) +{ + int i, min = array[0]; + for (i = 1; i < nel; i++) + min = FFMIN(array[i], min); + return min; +} + +static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band) +{ + // Requirements (14496-3 sp04 p205) + if (n_master <= 0) { + av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master); + return -1; + } + if (bs_xover_band >= n_master) { + av_log(avctx, AV_LOG_ERROR, + "Invalid bitstream, crossover band index beyond array bounds: %d\n", + bs_xover_band); + return -1; + } + return 0; +} + +/// Master Frequency Band Table (14496-3 sp04 p194) +static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr, + SpectrumParameters *spectrum) +{ + unsigned int temp, max_qmf_subbands = 0; + unsigned int start_min, stop_min; + int k; + const int8_t *sbr_offset_ptr; + int16_t stop_dk[13]; + + if (sbr->sample_rate < 32000) { + temp = 3000; + } else if (sbr->sample_rate < 64000) { + temp = 4000; + } else + temp = 5000; + + switch (sbr->sample_rate) { + case 16000: + sbr_offset_ptr = sbr_offset[0]; + break; + case 22050: + sbr_offset_ptr = sbr_offset[1]; + break; + case 24000: + sbr_offset_ptr = sbr_offset[2]; + break; + case 32000: + sbr_offset_ptr = sbr_offset[3]; + break; + case 44100: case 48000: case 64000: + sbr_offset_ptr = sbr_offset[4]; + break; + case 88200: case 96000: case 128000: case 176400: case 192000: + sbr_offset_ptr = sbr_offset[5]; + break; + default: + av_log(ac->avctx, AV_LOG_ERROR, + "Unsupported sample rate for SBR: %d\n", sbr->sample_rate); + return -1; + } + + start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate; + stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate; + + sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; + + if (spectrum->bs_stop_freq < 14) { + sbr->k[2] = stop_min; + make_bands(stop_dk, stop_min, 64, 13); + qsort(stop_dk, 13, sizeof(stop_dk[0]), qsort_comparison_function_int16); + for (k = 0; k < spectrum->bs_stop_freq; k++) + sbr->k[2] += stop_dk[k]; + } else if (spectrum->bs_stop_freq == 14) { + sbr->k[2] = 2*sbr->k[0]; + } else if (spectrum->bs_stop_freq == 15) { + sbr->k[2] = 3*sbr->k[0]; + } else { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq); + return -1; + } + sbr->k[2] = FFMIN(64, sbr->k[2]); + + // Requirements (14496-3 sp04 p205) + if (sbr->sample_rate <= 32000) { + max_qmf_subbands = 48; + } else if (sbr->sample_rate == 44100) { + max_qmf_subbands = 35; + } else if (sbr->sample_rate >= 48000) + max_qmf_subbands = 32; + else + av_assert0(0); + + if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]); + return -1; + } + + if (!spectrum->bs_freq_scale) { + int dk, k2diff; + + dk = spectrum->bs_alter_scale + 1; + sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1; + if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) + return -1; + + for (k = 1; k <= sbr->n_master; k++) + sbr->f_master[k] = dk; + + k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk; + if (k2diff < 0) { + sbr->f_master[1]--; + sbr->f_master[2]-= (k2diff < -1); + } else if (k2diff) { + sbr->f_master[sbr->n_master]++; + } + + sbr->f_master[0] = sbr->k[0]; + for (k = 1; k <= sbr->n_master; k++) + sbr->f_master[k] += sbr->f_master[k - 1]; + + } else { + int half_bands = 7 - spectrum->bs_freq_scale; // bs_freq_scale = {1,2,3} + int two_regions, num_bands_0; + int vdk0_max, vdk1_min; + int16_t vk0[49]; + + if (49 * sbr->k[2] > 110 * sbr->k[0]) { + two_regions = 1; + sbr->k[1] = 2 * sbr->k[0]; + } else { + two_regions = 0; + sbr->k[1] = sbr->k[2]; + } + + num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2; + + if (num_bands_0 <= 0) { // Requirements (14496-3 sp04 p205) + av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0); + return -1; + } + + vk0[0] = 0; + + make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0); + + qsort(vk0 + 1, num_bands_0, sizeof(vk0[1]), qsort_comparison_function_int16); + vdk0_max = vk0[num_bands_0]; + + vk0[0] = sbr->k[0]; + for (k = 1; k <= num_bands_0; k++) { + if (vk0[k] <= 0) { // Requirements (14496-3 sp04 p205) + av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]); + return -1; + } + vk0[k] += vk0[k-1]; + } + + if (two_regions) { + int16_t vk1[49]; + float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f + : 1.0f; // bs_alter_scale = {0,1} + int num_bands_1 = lrintf(half_bands * invwarp * + log2f(sbr->k[2] / (float)sbr->k[1])) * 2; + + make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1); + + vdk1_min = array_min_int16(vk1 + 1, num_bands_1); + + if (vdk1_min < vdk0_max) { + int change; + qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); + change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1); + vk1[1] += change; + vk1[num_bands_1] -= change; + } + + qsort(vk1 + 1, num_bands_1, sizeof(vk1[1]), qsort_comparison_function_int16); + + vk1[0] = sbr->k[1]; + for (k = 1; k <= num_bands_1; k++) { + if (vk1[k] <= 0) { // Requirements (14496-3 sp04 p205) + av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]); + return -1; + } + vk1[k] += vk1[k-1]; + } + + sbr->n_master = num_bands_0 + num_bands_1; + if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) + return -1; + memcpy(&sbr->f_master[0], vk0, + (num_bands_0 + 1) * sizeof(sbr->f_master[0])); + memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1, + num_bands_1 * sizeof(sbr->f_master[0])); + + } else { + sbr->n_master = num_bands_0; + if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) + return -1; + memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0])); + } + } + + return 0; +} + +/// High Frequency Generation - Patch Construction (14496-3 sp04 p216 fig. 4.46) +static int sbr_hf_calc_npatches(AACContext *ac, SpectralBandReplication *sbr) +{ + int i, k, last_k = -1, last_msb = -1, sb = 0; + int msb = sbr->k[0]; + int usb = sbr->kx[1]; + int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate; + + sbr->num_patches = 0; + + if (goal_sb < sbr->kx[1] + sbr->m[1]) { + for (k = 0; sbr->f_master[k] < goal_sb; k++) ; + } else + k = sbr->n_master; + + do { + int odd = 0; + if (k == last_k && msb == last_msb) { + av_log(ac->avctx, AV_LOG_ERROR, "patch construction failed\n"); + return AVERROR_INVALIDDATA; + } + last_k = k; + last_msb = msb; + for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) { + sb = sbr->f_master[i]; + odd = (sb + sbr->k[0]) & 1; + } + + // Requirements (14496-3 sp04 p205) sets the maximum number of patches to 5. + // After this check the final number of patches can still be six which is + // illegal however the Coding Technologies decoder check stream has a final + // count of 6 patches + if (sbr->num_patches > 5) { + av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches); + return -1; + } + + sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0); + sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches]; + + if (sbr->patch_num_subbands[sbr->num_patches] > 0) { + usb = sb; + msb = sb; + sbr->num_patches++; + } else + msb = sbr->kx[1]; + + if (sbr->f_master[k] - sb < 3) + k = sbr->n_master; + } while (sb != sbr->kx[1] + sbr->m[1]); + + if (sbr->num_patches > 1 && + sbr->patch_num_subbands[sbr->num_patches - 1] < 3) + sbr->num_patches--; + + return 0; +} + +/// Derived Frequency Band Tables (14496-3 sp04 p197) +static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr) +{ + int k, temp; + + sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band; + sbr->n[0] = (sbr->n[1] + 1) >> 1; + + memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band], + (sbr->n[1] + 1) * sizeof(sbr->f_master[0])); + sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0]; + sbr->kx[1] = sbr->f_tablehigh[0]; + + // Requirements (14496-3 sp04 p205) + if (sbr->kx[1] + sbr->m[1] > 64) { + av_log(ac->avctx, AV_LOG_ERROR, + "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]); + return -1; + } + if (sbr->kx[1] > 32) { + av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]); + return -1; + } + + sbr->f_tablelow[0] = sbr->f_tablehigh[0]; + temp = sbr->n[1] & 1; + for (k = 1; k <= sbr->n[0]; k++) + sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp]; + + sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands * + log2f(sbr->k[2] / (float)sbr->kx[1]))); // 0 <= bs_noise_bands <= 3 + if (sbr->n_q > 5) { + av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q); + return -1; + } + + sbr->f_tablenoise[0] = sbr->f_tablelow[0]; + temp = 0; + for (k = 1; k <= sbr->n_q; k++) { + temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k); + sbr->f_tablenoise[k] = sbr->f_tablelow[temp]; + } + + if (sbr_hf_calc_npatches(ac, sbr) < 0) + return -1; + + sbr_make_f_tablelim(sbr); + + sbr->data[0].f_indexnoise = 0; + sbr->data[1].f_indexnoise = 0; + + return 0; +} + +static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec, + int elements) +{ + int i; + for (i = 0; i < elements; i++) { + vec[i] = get_bits1(gb); + } +} + +/** ceil(log2(index+1)) */ +static const int8_t ceil_log2[] = { + 0, 1, 2, 2, 3, 3, +}; + +static int read_sbr_grid(AACContext *ac, SpectralBandReplication *sbr, + GetBitContext *gb, SBRData *ch_data) +{ + int i; + int bs_pointer = 0; + // frameLengthFlag ? 15 : 16; 960 sample length frames unsupported; this value is numTimeSlots + int abs_bord_trail = 16; + int num_rel_lead, num_rel_trail; + unsigned bs_num_env_old = ch_data->bs_num_env; + + ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env]; + ch_data->bs_amp_res = sbr->bs_amp_res_header; + ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old]; + + switch (ch_data->bs_frame_class = get_bits(gb, 2)) { + case FIXFIX: + ch_data->bs_num_env = 1 << get_bits(gb, 2); + num_rel_lead = ch_data->bs_num_env - 1; + if (ch_data->bs_num_env == 1) + ch_data->bs_amp_res = 0; + + if (ch_data->bs_num_env > 4) { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n", + ch_data->bs_num_env); + return -1; + } + + ch_data->t_env[0] = 0; + ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; + + abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) / + ch_data->bs_num_env; + for (i = 0; i < num_rel_lead; i++) + ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail; + + ch_data->bs_freq_res[1] = get_bits1(gb); + for (i = 1; i < ch_data->bs_num_env; i++) + ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1]; + break; + case FIXVAR: + abs_bord_trail += get_bits(gb, 2); + num_rel_trail = get_bits(gb, 2); + ch_data->bs_num_env = num_rel_trail + 1; + ch_data->t_env[0] = 0; + ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; + + for (i = 0; i < num_rel_trail; i++) + ch_data->t_env[ch_data->bs_num_env - 1 - i] = + ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; + + bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); + + for (i = 0; i < ch_data->bs_num_env; i++) + ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb); + break; + case VARFIX: + ch_data->t_env[0] = get_bits(gb, 2); + num_rel_lead = get_bits(gb, 2); + ch_data->bs_num_env = num_rel_lead + 1; + ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; + + for (i = 0; i < num_rel_lead; i++) + ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; + + bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); + + get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); + break; + case VARVAR: + ch_data->t_env[0] = get_bits(gb, 2); + abs_bord_trail += get_bits(gb, 2); + num_rel_lead = get_bits(gb, 2); + num_rel_trail = get_bits(gb, 2); + ch_data->bs_num_env = num_rel_lead + num_rel_trail + 1; + + if (ch_data->bs_num_env > 5) { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n", + ch_data->bs_num_env); + return -1; + } + + ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; + + for (i = 0; i < num_rel_lead; i++) + ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; + for (i = 0; i < num_rel_trail; i++) + ch_data->t_env[ch_data->bs_num_env - 1 - i] = + ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; + + bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); + + get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); + break; + } + + av_assert0(bs_pointer >= 0); + if (bs_pointer > ch_data->bs_num_env + 1) { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n", + bs_pointer); + return -1; + } + + for (i = 1; i <= ch_data->bs_num_env; i++) { + if (ch_data->t_env[i-1] > ch_data->t_env[i]) { + av_log(ac->avctx, AV_LOG_ERROR, "Non monotone time borders\n"); + return -1; + } + } + + ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1; + + ch_data->t_q[0] = ch_data->t_env[0]; + ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env]; + if (ch_data->bs_num_noise > 1) { + int idx; + if (ch_data->bs_frame_class == FIXFIX) { + idx = ch_data->bs_num_env >> 1; + } else if (ch_data->bs_frame_class & 1) { // FIXVAR or VARVAR + idx = ch_data->bs_num_env - FFMAX(bs_pointer - 1, 1); + } else { // VARFIX + if (!bs_pointer) + idx = 1; + else if (bs_pointer == 1) + idx = ch_data->bs_num_env - 1; + else // bs_pointer > 1 + idx = bs_pointer - 1; + } + ch_data->t_q[1] = ch_data->t_env[idx]; + } + + ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old); // l_APrev + ch_data->e_a[1] = -1; + if ((ch_data->bs_frame_class & 1) && bs_pointer) { // FIXVAR or VARVAR and bs_pointer != 0 + ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer; + } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1)) // VARFIX and bs_pointer > 1 + ch_data->e_a[1] = bs_pointer - 1; + + return 0; +} + +static void copy_sbr_grid(SBRData *dst, const SBRData *src) { + //These variables are saved from the previous frame rather than copied + dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env]; + dst->t_env_num_env_old = dst->t_env[dst->bs_num_env]; + dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env); + + //These variables are read from the bitstream and therefore copied + memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res)); + memcpy(dst->t_env, src->t_env, sizeof(dst->t_env)); + memcpy(dst->t_q, src->t_q, sizeof(dst->t_q)); + dst->bs_num_env = src->bs_num_env; + dst->bs_amp_res = src->bs_amp_res; + dst->bs_num_noise = src->bs_num_noise; + dst->bs_frame_class = src->bs_frame_class; + dst->e_a[1] = src->e_a[1]; +} + +/// Read how the envelope and noise floor data is delta coded +static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb, + SBRData *ch_data) +{ + get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); + get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); +} + +/// Read inverse filtering data +static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb, + SBRData *ch_data) +{ + int i; + + memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t)); + for (i = 0; i < sbr->n_q; i++) + ch_data->bs_invf_mode[0][i] = get_bits(gb, 2); +} + +static void read_sbr_envelope(SpectralBandReplication *sbr, GetBitContext *gb, + SBRData *ch_data, int ch) +{ + int bits; + int i, j, k; + VLC_TYPE (*t_huff)[2], (*f_huff)[2]; + int t_lav, f_lav; + const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; + const int odd = sbr->n[1] & 1; + + if (sbr->bs_coupling && ch) { + if (ch_data->bs_amp_res) { + bits = 5; + t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_3_0DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_3_0DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; + } else { + bits = 6; + t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_1_5DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_1_5DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_1_5DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_1_5DB]; + } + } else { + if (ch_data->bs_amp_res) { + bits = 6; + t_huff = vlc_sbr[T_HUFFMAN_ENV_3_0DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_3_0DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; + } else { + bits = 7; + t_huff = vlc_sbr[T_HUFFMAN_ENV_1_5DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_1_5DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_1_5DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_1_5DB]; + } + } + + for (i = 0; i < ch_data->bs_num_env; i++) { + if (ch_data->bs_df_env[i]) { + // bs_freq_res[0] == bs_freq_res[bs_num_env] from prev frame + if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) { + for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) + ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); + } else if (ch_data->bs_freq_res[i + 1]) { + for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { + k = (j + odd) >> 1; // find k such that f_tablelow[k] <= f_tablehigh[j] < f_tablelow[k + 1] + ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); + } + } else { + for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { + k = j ? 2*j - odd : 0; // find k such that f_tablehigh[k] == f_tablelow[j] + ch_data->env_facs[i + 1][j] = ch_data->env_facs[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); + } + } + } else { + ch_data->env_facs[i + 1][0] = delta * get_bits(gb, bits); // bs_env_start_value_balance + for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) + ch_data->env_facs[i + 1][j] = ch_data->env_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); + } + } + + //assign 0th elements of env_facs from last elements + memcpy(ch_data->env_facs[0], ch_data->env_facs[ch_data->bs_num_env], + sizeof(ch_data->env_facs[0])); +} + +static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb, + SBRData *ch_data, int ch) +{ + int i, j; + VLC_TYPE (*t_huff)[2], (*f_huff)[2]; + int t_lav, f_lav; + int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; + + if (sbr->bs_coupling && ch) { + t_huff = vlc_sbr[T_HUFFMAN_NOISE_BAL_3_0DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_BAL_3_0DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; + } else { + t_huff = vlc_sbr[T_HUFFMAN_NOISE_3_0DB].table; + t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_3_0DB]; + f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; + f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; + } + + for (i = 0; i < ch_data->bs_num_noise; i++) { + if (ch_data->bs_df_noise[i]) { + for (j = 0; j < sbr->n_q; j++) + ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav); + } else { + ch_data->noise_facs[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level + for (j = 1; j < sbr->n_q; j++) + ch_data->noise_facs[i + 1][j] = ch_data->noise_facs[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); + } + } + + //assign 0th elements of noise_facs from last elements + memcpy(ch_data->noise_facs[0], ch_data->noise_facs[ch_data->bs_num_noise], + sizeof(ch_data->noise_facs[0])); +} + +static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, + GetBitContext *gb, + int bs_extension_id, int *num_bits_left) +{ + switch (bs_extension_id) { + case EXTENSION_ID_PS: + if (!ac->oc[1].m4ac.ps) { + av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n"); + skip_bits_long(gb, *num_bits_left); // bs_fill_bits + *num_bits_left = 0; + } else { +#if 1 + *num_bits_left -= ff_ps_read_data(ac->avctx, gb, &sbr->ps, *num_bits_left); + ac->avctx->profile = FF_PROFILE_AAC_HE_V2; +#else + avpriv_report_missing_feature(ac->avctx, "Parametric Stereo"); + skip_bits_long(gb, *num_bits_left); // bs_fill_bits + *num_bits_left = 0; +#endif + } + break; + default: + // some files contain 0-padding + if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left)) + avpriv_request_sample(ac->avctx, "Reserved SBR extensions"); + skip_bits_long(gb, *num_bits_left); // bs_fill_bits + *num_bits_left = 0; + break; + } +} + +static int read_sbr_single_channel_element(AACContext *ac, + SpectralBandReplication *sbr, + GetBitContext *gb) +{ + if (get_bits1(gb)) // bs_data_extra + skip_bits(gb, 4); // bs_reserved + + if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) + return -1; + read_sbr_dtdf(sbr, gb, &sbr->data[0]); + read_sbr_invf(sbr, gb, &sbr->data[0]); + read_sbr_envelope(sbr, gb, &sbr->data[0], 0); + read_sbr_noise(sbr, gb, &sbr->data[0], 0); + + if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) + get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); + + return 0; +} + +static int read_sbr_channel_pair_element(AACContext *ac, + SpectralBandReplication *sbr, + GetBitContext *gb) +{ + if (get_bits1(gb)) // bs_data_extra + skip_bits(gb, 8); // bs_reserved + + if ((sbr->bs_coupling = get_bits1(gb))) { + if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) + return -1; + copy_sbr_grid(&sbr->data[1], &sbr->data[0]); + read_sbr_dtdf(sbr, gb, &sbr->data[0]); + read_sbr_dtdf(sbr, gb, &sbr->data[1]); + read_sbr_invf(sbr, gb, &sbr->data[0]); + memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); + memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); + read_sbr_envelope(sbr, gb, &sbr->data[0], 0); + read_sbr_noise(sbr, gb, &sbr->data[0], 0); + read_sbr_envelope(sbr, gb, &sbr->data[1], 1); + read_sbr_noise(sbr, gb, &sbr->data[1], 1); + } else { + if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) || + read_sbr_grid(ac, sbr, gb, &sbr->data[1])) + return -1; + read_sbr_dtdf(sbr, gb, &sbr->data[0]); + read_sbr_dtdf(sbr, gb, &sbr->data[1]); + read_sbr_invf(sbr, gb, &sbr->data[0]); + read_sbr_invf(sbr, gb, &sbr->data[1]); + read_sbr_envelope(sbr, gb, &sbr->data[0], 0); + read_sbr_envelope(sbr, gb, &sbr->data[1], 1); + read_sbr_noise(sbr, gb, &sbr->data[0], 0); + read_sbr_noise(sbr, gb, &sbr->data[1], 1); + } + + if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) + get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); + if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) + get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); + + return 0; +} + +static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr, + GetBitContext *gb, int id_aac) +{ + unsigned int cnt = get_bits_count(gb); + + sbr->id_aac = id_aac; + + if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { + if (read_sbr_single_channel_element(ac, sbr, gb)) { + sbr_turnoff(sbr); + return get_bits_count(gb) - cnt; + } + } else if (id_aac == TYPE_CPE) { + if (read_sbr_channel_pair_element(ac, sbr, gb)) { + sbr_turnoff(sbr); + return get_bits_count(gb) - cnt; + } + } else { + av_log(ac->avctx, AV_LOG_ERROR, + "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac); + sbr_turnoff(sbr); + return get_bits_count(gb) - cnt; + } + if (get_bits1(gb)) { // bs_extended_data + int num_bits_left = get_bits(gb, 4); // bs_extension_size + if (num_bits_left == 15) + num_bits_left += get_bits(gb, 8); // bs_esc_count + + num_bits_left <<= 3; + while (num_bits_left > 7) { + num_bits_left -= 2; + read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left); // bs_extension_id + } + if (num_bits_left < 0) { + av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n"); + } + if (num_bits_left > 0) + skip_bits(gb, num_bits_left); + } + + return get_bits_count(gb) - cnt; +} + +static void sbr_reset(AACContext *ac, SpectralBandReplication *sbr) +{ + int err; + err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params); + if (err >= 0) + err = sbr_make_f_derived(ac, sbr); + if (err < 0) { + av_log(ac->avctx, AV_LOG_ERROR, + "SBR reset failed. Switching SBR to pure upsampling mode.\n"); + sbr_turnoff(sbr); + } +} + +/** + * Decode Spectral Band Replication extension data; reference: table 4.55. + * + * @param crc flag indicating the presence of CRC checksum + * @param cnt length of TYPE_FIL syntactic element in bytes + * + * @return Returns number of bytes consumed from the TYPE_FIL element. + */ +int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, + GetBitContext *gb_host, int crc, int cnt, int id_aac) +{ + unsigned int num_sbr_bits = 0, num_align_bits; + unsigned bytes_read; + GetBitContext gbc = *gb_host, *gb = &gbc; + skip_bits_long(gb_host, cnt*8 - 4); + + sbr->reset = 0; + + if (!sbr->sample_rate) + sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support + if (!ac->oc[1].m4ac.ext_sample_rate) + ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate; + + if (crc) { + skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check + num_sbr_bits += 10; + } + + //Save some state from the previous frame. + sbr->kx[0] = sbr->kx[1]; + sbr->m[0] = sbr->m[1]; + sbr->kx_and_m_pushed = 1; + + num_sbr_bits++; + if (get_bits1(gb)) // bs_header_flag + num_sbr_bits += read_sbr_header(sbr, gb); + + if (sbr->reset) + sbr_reset(ac, sbr); + + if (sbr->start) + num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac); + + num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7; + bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3); + + if (bytes_read > cnt) { + av_log(ac->avctx, AV_LOG_ERROR, + "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read); + } + return cnt; +} + +/** + * Analysis QMF Bank (14496-3 sp04 p206) + * + * @param x pointer to the beginning of the first sample window + * @param W array of complex-valued samples split into subbands + */ +#ifndef sbr_qmf_analysis +static void sbr_qmf_analysis(AVFloatDSPContext *dsp, FFTContext *mdct, + SBRDSPContext *sbrdsp, const float *in, float *x, + float z[320], float W[2][32][32][2], int buf_idx) +{ + int i; + memcpy(x , x+1024, (320-32)*sizeof(x[0])); + memcpy(x+288, in, 1024*sizeof(x[0])); + for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames + // are not supported + dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320); + sbrdsp->sum64x5(z); + sbrdsp->qmf_pre_shuffle(z); + mdct->imdct_half(mdct, z, z+64); + sbrdsp->qmf_post_shuffle(W[buf_idx][i], z); + x += 32; + } +} +#endif + +/** + * Synthesis QMF Bank (14496-3 sp04 p206) and Downsampled Synthesis QMF Bank + * (14496-3 sp04 p206) + */ +#ifndef sbr_qmf_synthesis +static void sbr_qmf_synthesis(FFTContext *mdct, + SBRDSPContext *sbrdsp, AVFloatDSPContext *dsp, + float *out, float X[2][38][64], + float mdct_buf[2][64], + float *v0, int *v_off, const unsigned int div) +{ + int i, n; + const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us; + const int step = 128 >> div; + float *v; + for (i = 0; i < 32; i++) { + if (*v_off < step) { + int saved_samples = (1280 - 128) >> div; + memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float)); + *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step; + } else { + *v_off -= step; + } + v = v0 + *v_off; + if (div) { + for (n = 0; n < 32; n++) { + X[0][i][ n] = -X[0][i][n]; + X[0][i][32+n] = X[1][i][31-n]; + } + mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); + sbrdsp->qmf_deint_neg(v, mdct_buf[0]); + } else { + sbrdsp->neg_odd_64(X[1][i]); + mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); + mdct->imdct_half(mdct, mdct_buf[1], X[1][i]); + sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]); + } + dsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div); + dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div); + dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div); + out += 64 >> div; + } +} +#endif + +/// Generate the subband filtered lowband +static int sbr_lf_gen(AACContext *ac, SpectralBandReplication *sbr, + float X_low[32][40][2], const float W[2][32][32][2], + int buf_idx) +{ + int i, k; + const int t_HFGen = 8; + const int i_f = 32; + memset(X_low, 0, 32*sizeof(*X_low)); + for (k = 0; k < sbr->kx[1]; k++) { + for (i = t_HFGen; i < i_f + t_HFGen; i++) { + X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0]; + X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1]; + } + } + buf_idx = 1-buf_idx; + for (k = 0; k < sbr->kx[0]; k++) { + for (i = 0; i < t_HFGen; i++) { + X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0]; + X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1]; + } + } + return 0; +} + +/// High Frequency Generator (14496-3 sp04 p215) +static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr, + float X_high[64][40][2], const float X_low[32][40][2], + const float (*alpha0)[2], const float (*alpha1)[2], + const float bw_array[5], const uint8_t *t_env, + int bs_num_env) +{ + int j, x; + int g = 0; + int k = sbr->kx[1]; + for (j = 0; j < sbr->num_patches; j++) { + for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) { + const int p = sbr->patch_start_subband[j] + x; + while (g <= sbr->n_q && k >= sbr->f_tablenoise[g]) + g++; + g--; + + if (g < 0) { + av_log(ac->avctx, AV_LOG_ERROR, + "ERROR : no subband found for frequency %d\n", k); + return -1; + } + + sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET, + X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET, + alpha0[p], alpha1[p], bw_array[g], + 2 * t_env[0], 2 * t_env[bs_num_env]); + } + } + if (k < sbr->m[1] + sbr->kx[1]) + memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high)); + + return 0; +} + +/// Generate the subband filtered lowband +static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64], + const float Y0[38][64][2], const float Y1[38][64][2], + const float X_low[32][40][2], int ch) +{ + int k, i; + const int i_f = 32; + const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0); + memset(X, 0, 2*sizeof(*X)); + for (k = 0; k < sbr->kx[0]; k++) { + for (i = 0; i < i_Temp; i++) { + X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; + X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; + } + } + for (; k < sbr->kx[0] + sbr->m[0]; k++) { + for (i = 0; i < i_Temp; i++) { + X[0][i][k] = Y0[i + i_f][k][0]; + X[1][i][k] = Y0[i + i_f][k][1]; + } + } + + for (k = 0; k < sbr->kx[1]; k++) { + for (i = i_Temp; i < 38; i++) { + X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; + X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; + } + } + for (; k < sbr->kx[1] + sbr->m[1]; k++) { + for (i = i_Temp; i < i_f; i++) { + X[0][i][k] = Y1[i][k][0]; + X[1][i][k] = Y1[i][k][1]; + } + } + return 0; +} + +/** High Frequency Adjustment (14496-3 sp04 p217) and Mapping + * (14496-3 sp04 p217) + */ +static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, + SBRData *ch_data, int e_a[2]) +{ + int e, i, m; + + memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1])); + for (e = 0; e < ch_data->bs_num_env; e++) { + const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]]; + uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; + int k; + + if (sbr->kx[1] != table[0]) { + av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. " + "Derived frequency tables were not regenerated.\n"); + sbr_turnoff(sbr); + return AVERROR_BUG; + } + for (i = 0; i < ilim; i++) + for (m = table[i]; m < table[i + 1]; m++) + sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i]; + + // ch_data->bs_num_noise > 1 => 2 noise floors + k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]); + for (i = 0; i < sbr->n_q; i++) + for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++) + sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i]; + + for (i = 0; i < sbr->n[1]; i++) { + if (ch_data->bs_add_harmonic_flag) { + const unsigned int m_midpoint = + (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1; + + ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] * + (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1)); + } + } + + for (i = 0; i < ilim; i++) { + int additional_sinusoid_present = 0; + for (m = table[i]; m < table[i + 1]; m++) { + if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) { + additional_sinusoid_present = 1; + break; + } + } + memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present, + (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0])); + } + } + + memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0])); + return 0; +} + +/// Estimation of current envelope (14496-3 sp04 p218) +static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2], + SpectralBandReplication *sbr, SBRData *ch_data) +{ + int e, m; + int kx1 = sbr->kx[1]; + + if (sbr->bs_interpol_freq) { + for (e = 0; e < ch_data->bs_num_env; e++) { + const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]); + int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; + int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; + + for (m = 0; m < sbr->m[1]; m++) { + float sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb); + e_curr[e][m] = sum * recip_env_size; + } + } + } else { + int k, p; + + for (e = 0; e < ch_data->bs_num_env; e++) { + const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]); + int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; + int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; + const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; + + for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) { + float sum = 0.0f; + const int den = env_size * (table[p + 1] - table[p]); + + for (k = table[p]; k < table[p + 1]; k++) { + sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb); + } + sum /= den; + for (k = table[p]; k < table[p + 1]; k++) { + e_curr[e][k - kx1] = sum; + } + } + } + } +} + +void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, + float* L, float* R) +{ + int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate; + int ch; + int nch = (id_aac == TYPE_CPE) ? 2 : 1; + int err; + + if (id_aac != sbr->id_aac) { + av_log(ac->avctx, AV_LOG_ERROR, + "element type mismatch %d != %d\n", id_aac, sbr->id_aac); + sbr_turnoff(sbr); + } + + if (!sbr->kx_and_m_pushed) { + sbr->kx[0] = sbr->kx[1]; + sbr->m[0] = sbr->m[1]; + } else { + sbr->kx_and_m_pushed = 0; + } + + if (sbr->start) { + sbr_dequant(sbr, id_aac); + } + for (ch = 0; ch < nch; ch++) { + /* decode channel */ + sbr_qmf_analysis(ac->fdsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples, + (float*)sbr->qmf_filter_scratch, + sbr->data[ch].W, sbr->data[ch].Ypos); + sbr->c.sbr_lf_gen(ac, sbr, sbr->X_low, + (const float (*)[32][32][2]) sbr->data[ch].W, + sbr->data[ch].Ypos); + sbr->data[ch].Ypos ^= 1; + if (sbr->start) { + sbr->c.sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, + (const float (*)[40][2]) sbr->X_low, sbr->k[0]); + sbr_chirp(sbr, &sbr->data[ch]); + av_assert0(sbr->data[ch].bs_num_env > 0); + sbr_hf_gen(ac, sbr, sbr->X_high, + (const float (*)[40][2]) sbr->X_low, + (const float (*)[2]) sbr->alpha0, + (const float (*)[2]) sbr->alpha1, + sbr->data[ch].bw_array, sbr->data[ch].t_env, + sbr->data[ch].bs_num_env); + + // hf_adj + err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); + if (!err) { + sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]); + sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); + sbr->c.sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos], + (const float (*)[40][2]) sbr->X_high, + sbr, &sbr->data[ch], + sbr->data[ch].e_a); + } + } + + /* synthesis */ + sbr->c.sbr_x_gen(sbr, sbr->X[ch], + (const float (*)[64][2]) sbr->data[ch].Y[1-sbr->data[ch].Ypos], + (const float (*)[64][2]) sbr->data[ch].Y[ sbr->data[ch].Ypos], + (const float (*)[40][2]) sbr->X_low, ch); + } + + if (ac->oc[1].m4ac.ps == 1) { + if (sbr->ps.start) { + ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); + } else { + memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); + } + nch = 2; + } + + sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, + L, sbr->X[0], sbr->qmf_filter_scratch, + sbr->data[0].synthesis_filterbank_samples, + &sbr->data[0].synthesis_filterbank_samples_offset, + downsampled); + if (nch == 2) + sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, + R, sbr->X[1], sbr->qmf_filter_scratch, + sbr->data[1].synthesis_filterbank_samples, + &sbr->data[1].synthesis_filterbank_samples_offset, + downsampled); +} + +static void aacsbr_func_ptr_init(AACSBRContext *c) +{ + c->sbr_lf_gen = sbr_lf_gen; + c->sbr_hf_assemble = sbr_hf_assemble; + c->sbr_x_gen = sbr_x_gen; + c->sbr_hf_inverse_filter = sbr_hf_inverse_filter; + + if(ARCH_MIPS) + ff_aacsbr_func_ptr_init_mips(c); +} diff --git a/libavcodec/sbrdsp.c b/libavcodec/sbrdsp.c index e4f053b107..aa60de4eda 100644 --- a/libavcodec/sbrdsp.c +++ b/libavcodec/sbrdsp.c @@ -25,15 +25,6 @@ #include "libavutil/intfloat.h" #include "sbrdsp.h" -static void sbr_sum64x5_c(float *z) -{ - int k; - for (k = 0; k < 64; k++) { - float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256]; - z[k] = f; - } -} - static float sbr_sum_square_c(float (*x)[2], int n) { float sum0 = 0.0f, sum1 = 0.0f; @@ -101,16 +92,6 @@ static void sbr_qmf_deint_neg_c(float *v, const float *src) } } -static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1) -{ - int i; - for (i = 0; i < 64; i++) { - v[ i] = src0[i] - src1[63 - i]; - v[127 - i] = src0[i] + src1[63 - i]; - } -} - - #if 0 /* This code is slower because it multiplies memory accesses. * It is left for educational purposes and because it may offer @@ -238,58 +219,4 @@ static av_always_inline void sbr_hf_apply_noise(float (*Y)[2], } } -static void sbr_hf_apply_noise_0(float (*Y)[2], const float *s_m, - const float *q_filt, int noise, - int kx, int m_max) -{ - sbr_hf_apply_noise(Y, s_m, q_filt, noise, 1.0, 0.0, m_max); -} - -static void sbr_hf_apply_noise_1(float (*Y)[2], const float *s_m, - const float *q_filt, int noise, - int kx, int m_max) -{ - float phi_sign = 1 - 2 * (kx & 1); - sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, phi_sign, m_max); -} - -static void sbr_hf_apply_noise_2(float (*Y)[2], const float *s_m, - const float *q_filt, int noise, - int kx, int m_max) -{ - sbr_hf_apply_noise(Y, s_m, q_filt, noise, -1.0, 0.0, m_max); -} - -static void sbr_hf_apply_noise_3(float (*Y)[2], const float *s_m, - const float *q_filt, int noise, - int kx, int m_max) -{ - float phi_sign = 1 - 2 * (kx & 1); - sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, -phi_sign, m_max); -} - -av_cold void ff_sbrdsp_init(SBRDSPContext *s) -{ - s->sum64x5 = sbr_sum64x5_c; - s->sum_square = sbr_sum_square_c; - s->neg_odd_64 = sbr_neg_odd_64_c; - s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c; - s->qmf_post_shuffle = sbr_qmf_post_shuffle_c; - s->qmf_deint_neg = sbr_qmf_deint_neg_c; - s->qmf_deint_bfly = sbr_qmf_deint_bfly_c; - s->autocorrelate = sbr_autocorrelate_c; - s->hf_gen = sbr_hf_gen_c; - s->hf_g_filt = sbr_hf_g_filt_c; - - s->hf_apply_noise[0] = sbr_hf_apply_noise_0; - s->hf_apply_noise[1] = sbr_hf_apply_noise_1; - s->hf_apply_noise[2] = sbr_hf_apply_noise_2; - s->hf_apply_noise[3] = sbr_hf_apply_noise_3; - - if (ARCH_ARM) - ff_sbrdsp_init_arm(s); - if (ARCH_X86) - ff_sbrdsp_init_x86(s); - if (ARCH_MIPS) - ff_sbrdsp_init_mips(s); -} +#include "sbrdsp_template.c" diff --git a/libavcodec/sbrdsp_template.c b/libavcodec/sbrdsp_template.c new file mode 100644 index 0000000000..410671e143 --- /dev/null +++ b/libavcodec/sbrdsp_template.c @@ -0,0 +1,95 @@ +/* + * AAC Spectral Band Replication decoding functions + * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) + * Copyright (c) 2009-2010 Alex Converse + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +static void sbr_sum64x5_c(float *z) +{ + int k; + for (k = 0; k < 64; k++) { + float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256]; + z[k] = f; + } +} + +static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1) +{ + int i; + for (i = 0; i < 64; i++) { + v[ i] = src0[i] - src1[63 - i]; + v[127 - i] = src0[i] + src1[63 - i]; + } +} + +static void sbr_hf_apply_noise_0(float (*Y)[2], const float *s_m, + const float *q_filt, int noise, + int kx, int m_max) +{ + sbr_hf_apply_noise(Y, s_m, q_filt, noise, 1.0, 0.0, m_max); +} + +static void sbr_hf_apply_noise_1(float (*Y)[2], const float *s_m, + const float *q_filt, int noise, + int kx, int m_max) +{ + float phi_sign = 1 - 2 * (kx & 1); + sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, phi_sign, m_max); +} + +static void sbr_hf_apply_noise_2(float (*Y)[2], const float *s_m, + const float *q_filt, int noise, + int kx, int m_max) +{ + sbr_hf_apply_noise(Y, s_m, q_filt, noise, -1.0, 0.0, m_max); +} + +static void sbr_hf_apply_noise_3(float (*Y)[2], const float *s_m, + const float *q_filt, int noise, + int kx, int m_max) +{ + float phi_sign = 1 - 2 * (kx & 1); + sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, -phi_sign, m_max); +} + +av_cold void ff_sbrdsp_init(SBRDSPContext *s) +{ + s->sum64x5 = sbr_sum64x5_c; + s->sum_square = sbr_sum_square_c; + s->neg_odd_64 = sbr_neg_odd_64_c; + s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c; + s->qmf_post_shuffle = sbr_qmf_post_shuffle_c; + s->qmf_deint_neg = sbr_qmf_deint_neg_c; + s->qmf_deint_bfly = sbr_qmf_deint_bfly_c; + s->autocorrelate = sbr_autocorrelate_c; + s->hf_gen = sbr_hf_gen_c; + s->hf_g_filt = sbr_hf_g_filt_c; + + s->hf_apply_noise[0] = sbr_hf_apply_noise_0; + s->hf_apply_noise[1] = sbr_hf_apply_noise_1; + s->hf_apply_noise[2] = sbr_hf_apply_noise_2; + s->hf_apply_noise[3] = sbr_hf_apply_noise_3; + + if (ARCH_ARM) + ff_sbrdsp_init_arm(s); + if (ARCH_X86) + ff_sbrdsp_init_x86(s); + if (ARCH_MIPS) + ff_sbrdsp_init_mips(s); +}