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diracdec: Make slice parameters common between lowdelay and future hq profile

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This commit is contained in:
Kieran Kunhya 2015-12-09 00:05:30 +00:00 committed by Rostislav Pehlivanov
parent 3bb6ce1af9
commit 9f374c5906
1 changed files with 19 additions and 17 deletions
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36
libavcodec/diracdec.c
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@ -168,14 +168,15 @@ typedef struct DiracContext {
unsigned old_delta_quant;
unsigned codeblock_mode;
unsigned num_x; /* number of horizontal slices */
unsigned num_y; /* number of vertical slices */
struct {
unsigned width;
unsigned height;
} codeblock[MAX_DWT_LEVELS+1];
struct {
unsigned num_x; /* number of horizontal slices */
unsigned num_y; /* number of vertical slices */
AVRational bytes; /* average bytes per slice */
uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
} lowdelay;
@ -723,10 +724,10 @@ static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
int slice_x, int slice_y, int bits_end,
SubBand *b1, SubBand *b2)
{
int left = b1->width * slice_x / s->lowdelay.num_x;
int right = b1->width *(slice_x+1) / s->lowdelay.num_x;
int top = b1->height * slice_y / s->lowdelay.num_y;
int bottom = b1->height *(slice_y+1) / s->lowdelay.num_y;
int left = b1->width * slice_x / s->num_x;
int right = b1->width *(slice_x+1) / s->num_x;
int top = b1->height * slice_y / s->num_y;
int bottom = b1->height *(slice_y+1) / s->num_y;
int qfactor = qscale_tab[FFMIN(quant, MAX_QUANT)];
int qoffset = qoffset_intra_tab[FFMIN(quant, MAX_QUANT)];
@ -761,12 +762,13 @@ static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
}
}
struct lowdelay_slice {
/* Used by Low Delay and High Quality profiles */
typedef struct DiracSlice {
GetBitContext gb;
int slice_x;
int slice_y;
int bytes;
};
} DiracSlice;
/**
@ -776,7 +778,7 @@ struct lowdelay_slice {
static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
{
DiracContext *s = avctx->priv_data;
struct lowdelay_slice *slice = arg;
DiracSlice *slice = arg;
GetBitContext *gb = &slice->gb;
enum dirac_subband orientation;
int level, quant, chroma_bits, chroma_end;
@ -820,10 +822,10 @@ static int decode_lowdelay(DiracContext *s)
AVCodecContext *avctx = s->avctx;
int slice_x, slice_y, bytes, bufsize;
const uint8_t *buf;
struct lowdelay_slice *slices;
DiracSlice *slices;
int slice_num = 0;
slices = av_mallocz_array(s->lowdelay.num_x, s->lowdelay.num_y * sizeof(struct lowdelay_slice));
slices = av_mallocz_array(s->num_x, s->num_y * sizeof(DiracSlice));
if (!slices)
return AVERROR(ENOMEM);
@ -832,11 +834,10 @@ static int decode_lowdelay(DiracContext *s)
buf = s->gb.buffer + get_bits_count(&s->gb)/8;
bufsize = get_bits_left(&s->gb);
for (slice_y = 0; bufsize > 0 && slice_y < s->lowdelay.num_y; slice_y++)
for (slice_x = 0; bufsize > 0 && slice_x < s->lowdelay.num_x; slice_x++) {
for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
bytes = (slice_num+1) * s->lowdelay.bytes.num / s->lowdelay.bytes.den
- slice_num * s->lowdelay.bytes.num / s->lowdelay.bytes.den;
slices[slice_num].bytes = bytes;
slices[slice_num].slice_x = slice_x;
slices[slice_num].slice_y = slice_y;
@ -849,9 +850,10 @@ static int decode_lowdelay(DiracContext *s)
else
bufsize = 0;
}
}
avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
sizeof(struct lowdelay_slice)); /* [DIRAC_STD] 13.5.2 Slices */
sizeof(struct DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
if (s->pshift) {
intra_dc_prediction_10(&s->plane[0].band[0][0]);
intra_dc_prediction_10(&s->plane[1].band[0][0]);
@ -1078,8 +1080,8 @@ static int dirac_unpack_idwt_params(DiracContext *s)
} else {
/* Slice parameters + quantization matrix*/
/*[DIRAC_STD] 11.3.4 Slice coding Parameters (low delay syntax only). slice_parameters() */
s->lowdelay.num_x = svq3_get_ue_golomb(gb);
s->lowdelay.num_y = svq3_get_ue_golomb(gb);
s->num_x = svq3_get_ue_golomb(gb);
s->num_y = svq3_get_ue_golomb(gb);
s->lowdelay.bytes.num = svq3_get_ue_golomb(gb);
s->lowdelay.bytes.den = svq3_get_ue_golomb(gb);