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ffmpeg.wasm-core
Commit 004ebd4b authored by Baptiste Coudurier's avatar Baptiste Coudurier
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avcodec/dvdec: correctly decode bottom mb row in 1080i field mode

parent 33203a08
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Showing with 72 additions and 20 deletions
libavcodec/dv.h
View file @ 004ebd4b
......@@ -31,6 +31,7 @@
#include "dv_profile.h"
#include "me_cmp.h"
#include "vlc.h"
#include "idctdsp.h"
typedef struct DVwork_chunk {
uint16_t buf_offset;
......@@ -52,6 +53,7 @@ typedef struct DVVideoContext {
me_cmp_func ildct_cmp;
DVwork_chunk work_chunks[4 * 12 * 27];
uint32_t idct_factor[2 * 4 * 16 * 64];
IDCTDSPContext idsp;
int quant_deadzone;
} DVVideoContext;
......
libavcodec/dvdec.c
View file @ 004ebd4b
......@@ -45,7 +45,6 @@
#include "dv_profile_internal.h"
#include "dvdata.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "put_bits.h"
#include "simple_idct.h"
......@@ -177,24 +176,22 @@ static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d)
static av_cold int dvvideo_decode_init(AVCodecContext *avctx)
{
DVVideoContext *s = avctx->priv_data;
IDCTDSPContext idsp;
int i;
memset(&idsp,0, sizeof(idsp));
ff_idctdsp_init(&idsp, avctx);
ff_idctdsp_init(&s->idsp, avctx);
for (i = 0; i < 64; i++)
s->dv_zigzag[0][i] = idsp.idct_permutation[ff_zigzag_direct[i]];
s->dv_zigzag[0][i] = s->idsp.idct_permutation[ff_zigzag_direct[i]];
if (avctx->lowres){
for (i = 0; i < 64; i++){
int j = ff_dv_zigzag248_direct[i];
s->dv_zigzag[1][i] = idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
s->dv_zigzag[1][i] = s->idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
}
}else
memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1]));
s->idct_put[0] = idsp.idct_put;
s->idct_put[0] = s->idsp.idct_put;
s->idct_put[1] = ff_simple_idct248_put;
return ff_dvvideo_init(avctx);
......@@ -272,6 +269,49 @@ static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
put_bits(pb, bits_left, get_bits(gb, bits_left));
}
static av_always_inline void put_block_8x4(int16_t *block, uint8_t *restrict p, int stride)
{
int i, j;
const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
for (i = 0; i < 4; i++) {
for (j = 0; j < 8; j++)
p[j] = cm[block[j]];
block += 8;
p += stride;
}
}
static void dv100_idct_put_last_row_field_chroma(DVVideoContext *s, uint8_t *data,
int stride, int16_t *blocks)
{
s->idsp.idct(blocks + 0*64);
s->idsp.idct(blocks + 1*64);
put_block_8x4(blocks+0*64, data, stride<<1);
put_block_8x4(blocks+0*64 + 4*8, data + 8, stride<<1);
put_block_8x4(blocks+1*64, data + stride, stride<<1);
put_block_8x4(blocks+1*64 + 4*8, data + 8 + stride, stride<<1);
}
static void dv100_idct_put_last_row_field_luma(DVVideoContext *s, uint8_t *data,
int stride, int16_t *blocks)
{
s->idsp.idct(blocks + 0*64);
s->idsp.idct(blocks + 1*64);
s->idsp.idct(blocks + 2*64);
s->idsp.idct(blocks + 3*64);
put_block_8x4(blocks+0*64, data, stride<<1);
put_block_8x4(blocks+0*64 + 4*8, data + 16, stride<<1);
put_block_8x4(blocks+1*64, data + 8, stride<<1);
put_block_8x4(blocks+1*64 + 4*8, data + 24, stride<<1);
put_block_8x4(blocks+2*64, data + stride, stride<<1);
put_block_8x4(blocks+2*64 + 4*8, data + 16 + stride, stride<<1);
put_block_8x4(blocks+3*64, data + 8 + stride, stride<<1);
put_block_8x4(blocks+3*64 + 4*8, data + 24 + stride, stride<<1);
}
/* mb_x and mb_y are in units of 8 pixels */
static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
{
......@@ -443,14 +483,18 @@ retry:
}
y_ptr = s->frame->data[0] +
((mb_y * s->frame->linesize[0] + mb_x) << log2_blocksize);
linesize = s->frame->linesize[0] << is_field_mode[mb_index];
mb[0].idct_put(y_ptr, linesize, block + 0 * 64);
if (s->sys->video_stype == 4) { /* SD 422 */
mb[2].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 2 * 64);
if (mb_y == 134 && is_field_mode[mb_index]) {
dv100_idct_put_last_row_field_luma(s, y_ptr, s->frame->linesize[0], block);
} else {
mb[1].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 1 * 64);
mb[2].idct_put(y_ptr + y_stride, linesize, block + 2 * 64);
mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3 * 64);
linesize = s->frame->linesize[0] << is_field_mode[mb_index];
mb[0].idct_put(y_ptr, linesize, block + 0 * 64);
if (s->sys->video_stype == 4) { /* SD 422 */
mb[2].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 2 * 64);
} else {
mb[1].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 1 * 64);
mb[2].idct_put(y_ptr + y_stride, linesize, block + 2 * 64);
mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3 * 64);
}
}
mb += 4;
block += 4 * 64;
......@@ -478,13 +522,19 @@ retry:
mb++;
} else {
y_stride = (mb_y == 134) ? (1 << log2_blocksize) :
s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
linesize = s->frame->linesize[j] << is_field_mode[mb_index];
(mb++)->idct_put(c_ptr, linesize, block);
block += 64;
if (s->sys->bpm == 8) {
(mb++)->idct_put(c_ptr + y_stride, linesize, block);
s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
if (mb_y == 134 && is_field_mode[mb_index]) {
dv100_idct_put_last_row_field_chroma(s, c_ptr, s->frame->linesize[j], block);
mb += 2;
block += 2*64;
} else {
linesize = s->frame->linesize[j] << is_field_mode[mb_index];
(mb++)->idct_put(c_ptr, linesize, block);
block += 64;
if (s->sys->bpm == 8) {
(mb++)->idct_put(c_ptr + y_stride, linesize, block);
block += 64;
}
}
}
}
......
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