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https://git.videolan.org/git/ffmpeg.git
synced 2024-09-06 08:08:58 +02:00
move MPV_common_init after parsing stream parameters, matrix rebuild
Originally committed as revision 2894 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
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6faa4645c5
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@ -358,8 +358,13 @@ static inline void encode_mb_skip_run(MpegEncContext *s, int run){
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static void common_init(MpegEncContext *s)
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{
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int i;
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s->y_dc_scale_table=
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s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
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for(i=0;i<64;i++)
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s->dsp.idct_permutation[i]=i;
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}
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void ff_mpeg1_clean_buffers(MpegEncContext *s){
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@ -1745,8 +1750,13 @@ typedef struct Mpeg1Context {
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MpegEncContext mpeg_enc_ctx;
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int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
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int repeat_field; /* true if we must repeat the field */
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int display_weight;
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int display_height;
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AVPanScan pan_scan; /** some temporary storage for the panscan */
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int slice_count;
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int swap_uv;//indicate VCR2
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int save_aspect_info;
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} Mpeg1Context;
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static int mpeg_decode_init(AVCodecContext *avctx)
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@ -1766,6 +1776,122 @@ static int mpeg_decode_init(AVCodecContext *avctx)
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return 0;
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}
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static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
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const uint8_t *new_perm){
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uint16_t temp_matrix[64];
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int i;
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memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
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for(i=0;i<64;i++){
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matrix[new_perm[i]] = temp_matrix[old_perm[i]];
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}
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}
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//Call this function when we know all parameters
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//it may be called in different places for mpeg1 and mpeg2
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static int mpeg_decode_postinit(AVCodecContext *avctx){
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Mpeg1Context *s1 = avctx->priv_data;
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MpegEncContext *s = &s1->mpeg_enc_ctx;
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uint8_t old_permutation[64];
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if (
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(s1->mpeg_enc_ctx_allocated == 0)||
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avctx->width != s->width ||
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avctx->height != s->height||
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// s1->save_aspect_info != avctx->aspect_ratio_info||
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0)
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{
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if (s1->mpeg_enc_ctx_allocated) {
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MPV_common_end(s);
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}
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if( (s->width == 0 )||(s->height == 0))
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return -2;
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avctx->width = s->width;
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avctx->height = s->height;
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avctx->bit_rate = s->bit_rate;
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s1->save_aspect_info = s->aspect_ratio_info;
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//low_delay may be forced, in this case we will have B frames
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//that behave like P frames
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avctx->has_b_frames = !(s->low_delay);
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if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
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//mpeg1 fps
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avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
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avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
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//mpeg1 aspect
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avctx->sample_aspect_ratio= av_d2q(
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1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
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}else{//mpeg2
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//mpeg2 fps
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av_reduce(
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&s->avctx->frame_rate,
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&s->avctx->frame_rate_base,
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frame_rate_tab[s->frame_rate_index].num * (s->frame_rate_ext_n+1),
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frame_rate_tab[s->frame_rate_index].den * (s->frame_rate_ext_d+1),
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1<<30);
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//mpeg2 aspect
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if(s->aspect_ratio_info > 1){
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if( (s1->display_weight == 0 )||(s1->display_height == 0) ){
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s->avctx->sample_aspect_ratio=
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mpeg2_aspect[s->aspect_ratio_info];
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}else{
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s->avctx->sample_aspect_ratio=
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av_div_q(
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mpeg2_aspect[s->aspect_ratio_info],
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(AVRational){s1->display_weight, s1->display_height}
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);
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}
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}else{
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s->avctx->sample_aspect_ratio=
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av_div_q(
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mpeg2_aspect[s->aspect_ratio_info],
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(AVRational){s->width, s->height}
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);
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}
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}//mpeg2
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if(avctx->xvmc_acceleration){
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
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}else{
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if(s->chroma_format < 2){
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
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}else
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if(s->chroma_format == 2){
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
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}else
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if(s->chroma_format > 2){
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
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}
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}
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//until then pix_fmt may be changed right after codec init
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if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
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if( avctx->idct_algo == FF_IDCT_AUTO )
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avctx->idct_algo = FF_IDCT_SIMPLE;
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//quantization matrixes may need reordering
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//if dct permutation is changed
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memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
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if (MPV_common_init(s) < 0)
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return -2;
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quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
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quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
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quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
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quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
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s1->mpeg_enc_ctx_allocated = 1;
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}
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return 0;
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}
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/* return the 8 bit start code value and update the search
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state. Return -1 if no start code found */
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static int find_start_code(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
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@ -1800,6 +1926,9 @@ static int mpeg1_decode_picture(AVCodecContext *avctx,
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MpegEncContext *s = &s1->mpeg_enc_ctx;
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int ref, f_code, vbv_delay;
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if(mpeg_decode_postinit(s->avctx) < 0)
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return -2;
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init_get_bits(&s->gb, buf, buf_size*8);
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ref = get_bits(&s->gb, 10); /* temporal ref */
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@ -1838,7 +1967,6 @@ static void mpeg_decode_sequence_extension(MpegEncContext *s)
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{
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int horiz_size_ext, vert_size_ext;
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int bit_rate_ext;
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int frame_rate_ext_n, frame_rate_ext_d;
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int level, profile;
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skip_bits(&s->gb, 1); /* profil and level esc*/
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@ -1858,32 +1986,17 @@ static void mpeg_decode_sequence_extension(MpegEncContext *s)
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s->low_delay = get_bits1(&s->gb);
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if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
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frame_rate_ext_n = get_bits(&s->gb, 2);
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frame_rate_ext_d = get_bits(&s->gb, 5);
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av_reduce(
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&s->avctx->frame_rate,
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&s->avctx->frame_rate_base,
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frame_rate_tab[s->frame_rate_index].num * (frame_rate_ext_n+1),
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frame_rate_tab[s->frame_rate_index].den * (frame_rate_ext_d+1),
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1<<30);
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s->frame_rate_ext_n = get_bits(&s->gb, 2);
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s->frame_rate_ext_d = get_bits(&s->gb, 5);
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dprintf("sequence extension\n");
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s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
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s->avctx->sub_id = 2; /* indicates mpeg2 found */
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if(s->aspect_ratio_info <= 1)
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s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
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else{
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s->avctx->sample_aspect_ratio=
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av_div_q(
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mpeg2_aspect[s->aspect_ratio_info],
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(AVRational){s->width, s->height}
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);
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}
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if(s->avctx->debug & FF_DEBUG_PICT_INFO)
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av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
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profile, level, s->avctx->rc_buffer_size, s->bit_rate);
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}
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static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
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@ -1905,13 +2018,10 @@ static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
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s1->pan_scan.width= 16*w;
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s1->pan_scan.height=16*h;
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s1->display_weight = w;
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s1->display_height = h;
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if(s->aspect_ratio_info > 1)
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s->avctx->sample_aspect_ratio=
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av_div_q(
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mpeg2_aspect[s->aspect_ratio_info],
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(AVRational){w, h}
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);
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if(s->avctx->debug & FF_DEBUG_PICT_INFO)
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av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
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@ -2372,59 +2482,23 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
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{
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Mpeg1Context *s1 = avctx->priv_data;
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MpegEncContext *s = &s1->mpeg_enc_ctx;
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int width, height, i, v, j;
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float aspect;
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int i, v, j;
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init_get_bits(&s->gb, buf, buf_size*8);
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width = get_bits(&s->gb, 12);
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height = get_bits(&s->gb, 12);
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s->width = get_bits(&s->gb, 12);
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s->height = get_bits(&s->gb, 12);
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s->aspect_ratio_info= get_bits(&s->gb, 4);
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if (s->aspect_ratio_info == 0)
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return -1;
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aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
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avctx->sample_aspect_ratio= av_d2q(aspect, 255);
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s->frame_rate_index = get_bits(&s->gb, 4);
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if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
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return -1;
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s->bit_rate = get_bits(&s->gb, 18) * 400;
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if (get_bits1(&s->gb) == 0) /* marker */
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return -1;
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if (width <= 0 || height <= 0 ||
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(width % 2) != 0 || (height % 2) != 0)
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if (s->width <= 0 || s->height <= 0)
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return -1;
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if (width != s->width ||
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height != s->height) {
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/* start new mpeg1 context decoding */
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s->out_format = FMT_MPEG1;
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if (s1->mpeg_enc_ctx_allocated) {
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MPV_common_end(s);
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}
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s->width = width;
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s->height = height;
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avctx->has_b_frames= 1;
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avctx->width = width;
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avctx->height = height;
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avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
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avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
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avctx->bit_rate = s->bit_rate;
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if(avctx->xvmc_acceleration){
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
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}else{
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avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
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}
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if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
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if( avctx->idct_algo == FF_IDCT_AUTO )
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avctx->idct_algo = FF_IDCT_SIMPLE;
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if (MPV_common_init(s) < 0)
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return -1;
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s1->mpeg_enc_ctx_allocated = 1;
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s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
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}
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s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
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skip_bits(&s->gb, 1);
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@ -2437,19 +2511,19 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
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av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
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return -1;
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}
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j = s->intra_scantable.permutated[i];
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j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
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s->intra_matrix[j] = v;
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s->chroma_intra_matrix[j] = v;
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}
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#ifdef DEBUG
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dprintf("intra matrix present\n");
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for(i=0;i<64;i++)
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dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
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dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]);
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printf("\n");
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#endif
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} else {
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for(i=0;i<64;i++) {
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int j= s->dsp.idct_permutation[i];
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j = s->dsp.idct_permutation[i];
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v = ff_mpeg1_default_intra_matrix[i];
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s->intra_matrix[j] = v;
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s->chroma_intra_matrix[j] = v;
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@ -2462,14 +2536,14 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
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av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
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return -1;
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}
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j = s->intra_scantable.permutated[i];
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j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
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s->inter_matrix[j] = v;
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s->chroma_inter_matrix[j] = v;
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}
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#ifdef DEBUG
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dprintf("non intra matrix present\n");
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for(i=0;i<64;i++)
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dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
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dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]);
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printf("\n");
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#endif
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} else {
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@ -2494,6 +2568,8 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
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s->chroma_format = 1;
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s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
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avctx->sub_id = 1; /* indicates mpeg1 */
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s->out_format = FMT_MPEG1;
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s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
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if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
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if(s->avctx->debug & FF_DEBUG_PICT_INFO)
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