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MPEG-2 4:2:2 encoding support

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Originally committed as revision 5387 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Baptiste Coudurier 19 years ago
parent c2f69579bb
commit 2d974017b0
4 changed files with 136 additions and 62 deletions
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  1. 2
      Changelog
  2. 69
      libavcodec/mpeg12.c
  3. 125
      libavcodec/mpegvideo.c
  4. 2
      libavcodec/mpegvideo.h

2
Changelog
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@ -45,6 +45,8 @@ version <next>
- Smacker demuxer and decoder
- NuppelVideo/MythTV demuxer and RTjpeg decoder
- KMVC decoder
- MPEG-2 intra vlc support
- MPEG-2 4:2:2 encoder
version 0.4.9-pre1:

69
libavcodec/mpeg12.c
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@ -232,6 +232,12 @@ static int encode_init(AVCodecContext *avctx)
}
}
if(avctx->profile == FF_PROFILE_UNKNOWN)
avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
if(avctx->level == FF_LEVEL_UNKNOWN)
avctx->level = s->chroma_format == CHROMA_420 ? 8 : 5;
return 0;
}
@ -319,22 +325,14 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
if(s->codec_id == CODEC_ID_MPEG2VIDEO){
put_header(s, EXT_START_CODE);
put_bits(&s->pb, 4, 1); //seq ext
put_bits(&s->pb, 1, 0); //esc
if(s->avctx->profile == FF_PROFILE_UNKNOWN){
put_bits(&s->pb, 3, 4); //profile
}else{
put_bits(&s->pb, 3, s->avctx->profile); //profile
}
put_bits(&s->pb, 1, s->chroma_format == CHROMA_422); //escx
if(s->avctx->level == FF_LEVEL_UNKNOWN){
put_bits(&s->pb, 4, 8); //level
}else{
put_bits(&s->pb, 4, s->avctx->level); //level
}
put_bits(&s->pb, 3, s->avctx->profile); //profile
put_bits(&s->pb, 4, s->avctx->level); //level
put_bits(&s->pb, 1, s->progressive_sequence);
put_bits(&s->pb, 2, 1); //chroma format 4:2:0
put_bits(&s->pb, 2, s->chroma_format);
put_bits(&s->pb, 2, 0); //horizontal size ext
put_bits(&s->pb, 2, 0); //vertical size ext
put_bits(&s->pb, 12, v>>18); //bitrate ext
@ -468,7 +466,7 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
put_bits(&s->pb, 1, s->alternate_scan);
put_bits(&s->pb, 1, s->repeat_first_field);
s->progressive_frame = s->progressive_sequence;
put_bits(&s->pb, 1, s->chroma_420_type=s->progressive_frame);
put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
put_bits(&s->pb, 1, s->progressive_frame);
put_bits(&s->pb, 1, 0); //composite_display_flag
}
@ -496,9 +494,10 @@ static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
}
}
void mpeg1_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y)
static always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y,
int mb_block_count)
{
int i, cbp;
const int mb_x = s->mb_x;
@ -507,9 +506,9 @@ void mpeg1_encode_mb(MpegEncContext *s,
/* compute cbp */
cbp = 0;
for(i=0;i<6;i++) {
for(i=0;i<mb_block_count;i++) {
if (s->block_last_index[i] >= 0)
cbp |= 1 << (5 - i);
cbp |= 1 << (mb_block_count - 1 - i);
}
if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
@ -615,8 +614,14 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
s->mv_bits+= get_bits_diff(s);
}
if(cbp)
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
if(cbp) {
if (s->chroma_y_shift) {
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
} else {
put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
put_bits(&s->pb, 2, cbp & 3);
}
}
s->f_count++;
} else{
static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
@ -694,11 +699,17 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
}
s->mv_bits += get_bits_diff(s);
if(cbp)
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
if(cbp) {
if (s->chroma_y_shift) {
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
} else {
put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
put_bits(&s->pb, 2, cbp & 3);
}
}
}
for(i=0;i<6;i++) {
if (cbp & (1 << (5 - i))) {
for(i=0;i<mb_block_count;i++) {
if (cbp & (1 << (mb_block_count - 1 - i))) {
mpeg1_encode_block(s, block[i], i);
}
}
@ -710,6 +721,12 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
}
void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
{
if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
}
// RAL: Parameter added: f_or_b_code
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
{
@ -905,7 +922,7 @@ static void mpeg1_encode_block(MpegEncContext *s,
/* DC coef */
if (s->mb_intra) {
component = (n <= 3 ? 0 : n - 4 + 1);
component = (n <= 3 ? 0 : (n&1) + 1);
dc = block[0]; /* overflow is impossible */
diff = dc - s->last_dc[component];
encode_dc(s, diff, component);
@ -3249,7 +3266,7 @@ AVCodec mpeg2video_encoder = {
MPV_encode_picture,
MPV_encode_end,
.supported_framerates= frame_rate_tab+1,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
.capabilities= CODEC_CAP_DELAY,
};
#endif

125
libavcodec/mpegvideo.c
Unescape View File

@ -927,23 +927,39 @@ int MPV_encode_init(AVCodecContext *avctx)
MPV_encode_defaults(s);
if(avctx->pix_fmt != PIX_FMT_YUVJ420P && avctx->pix_fmt != PIX_FMT_YUV420P){
av_log(avctx, AV_LOG_ERROR, "only YUV420 is supported\n");
return -1;
}
if(avctx->codec_id == CODEC_ID_MJPEG || avctx->codec_id == CODEC_ID_LJPEG){
if(avctx->strict_std_compliance>FF_COMPLIANCE_INOFFICIAL && avctx->pix_fmt != PIX_FMT_YUVJ420P){
switch (avctx->codec_id) {
case CODEC_ID_MPEG2VIDEO:
if(avctx->pix_fmt != PIX_FMT_YUV420P && avctx->pix_fmt != PIX_FMT_YUV422P){
av_log(avctx, AV_LOG_ERROR, "only YUV420 and YUV422 are supported\n");
return -1;
}
break;
case CODEC_ID_LJPEG:
case CODEC_ID_MJPEG:
if(avctx->pix_fmt != PIX_FMT_YUVJ420P && (avctx->pix_fmt != PIX_FMT_YUV420P || avctx->strict_std_compliance>FF_COMPLIANCE_INOFFICIAL)){
av_log(avctx, AV_LOG_ERROR, "colorspace not supported in jpeg\n");
return -1;
}
}else{
if(avctx->strict_std_compliance>FF_COMPLIANCE_INOFFICIAL && avctx->pix_fmt != PIX_FMT_YUV420P){
av_log(avctx, AV_LOG_ERROR, "colorspace not supported\n");
break;
default:
if(avctx->pix_fmt != PIX_FMT_YUV420P){
av_log(avctx, AV_LOG_ERROR, "only YUV420 is supported\n");
return -1;
}
}
switch (avctx->pix_fmt) {
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUV422P:
s->chroma_format = CHROMA_422;
break;
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUV420P:
default:
s->chroma_format = CHROMA_420;
break;
}
s->bit_rate = avctx->bit_rate;
s->width = avctx->width;
s->height = avctx->height;
@ -2466,11 +2482,6 @@ int MPV_encode_picture(AVCodecContext *avctx,
AVFrame *pic_arg = data;
int i, stuffing_count;
if(avctx->pix_fmt != PIX_FMT_YUV420P && avctx->pix_fmt != PIX_FMT_YUVJ420P){
av_log(avctx, AV_LOG_ERROR, "this codec supports only YUV420P\n");
return -1;
}
for(i=0; i<avctx->thread_count; i++){
int start_y= s->thread_context[i]->start_mb_y;
int end_y= s->thread_context[i]-> end_mb_y;
@ -3968,8 +3979,17 @@ static always_inline void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM bloc
add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
if(!(s->flags&CODEC_FLAG_GRAY)){
add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
if (s->chroma_y_shift){
add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
}else{
dct_linesize >>= 1;
dct_offset >>=1;
add_dequant_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
}
}
} else if(s->codec_id != CODEC_ID_WMV2){
add_dct(s, block[0], 0, dest_y , dct_linesize);
@ -4011,8 +4031,17 @@ static always_inline void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM bloc
put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
if(!(s->flags&CODEC_FLAG_GRAY)){
put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
if(s->chroma_y_shift){
put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
}else{
dct_offset >>=1;
dct_linesize >>=1;
put_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
put_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
}
}
}else{
s->dsp.idct_put(dest_y , dct_linesize, block[0]);
@ -4234,19 +4263,19 @@ static void get_vissual_weight(int16_t *weight, uint8_t *ptr, int stride){
}
}
static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
static always_inline void encode_mb_internal(MpegEncContext *s, int motion_x, int motion_y, int mb_block_height, int mb_block_count)
{
int16_t weight[6][64];
DCTELEM orig[6][64];
int16_t weight[8][64];
DCTELEM orig[8][64];
const int mb_x= s->mb_x;
const int mb_y= s->mb_y;
int i;
int skip_dct[6];
int skip_dct[8];
int dct_offset = s->linesize*8; //default for progressive frames
uint8_t *ptr_y, *ptr_cb, *ptr_cr;
int wrap_y, wrap_c;
for(i=0; i<6; i++) skip_dct[i]=0;
for(i=0; i<mb_block_count; i++) skip_dct[i]=0;
if(s->adaptive_quant){
const int last_qp= s->qscale;
@ -4282,16 +4311,16 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
wrap_y = s->linesize;
wrap_c = s->uvlinesize;
ptr_y = s->new_picture.data[0] + (mb_y * 16 * wrap_y) + mb_x * 16;
ptr_cb = s->new_picture.data[1] + (mb_y * 8 * wrap_c) + mb_x * 8;
ptr_cr = s->new_picture.data[2] + (mb_y * 8 * wrap_c) + mb_x * 8;
ptr_cb = s->new_picture.data[1] + (mb_y * mb_block_height * wrap_c) + mb_x * 8;
ptr_cr = s->new_picture.data[2] + (mb_y * mb_block_height * wrap_c) + mb_x * 8;
if(mb_x*16+16 > s->width || mb_y*16+16 > s->height){
uint8_t *ebuf= s->edge_emu_buffer + 32;
ff_emulated_edge_mc(ebuf , ptr_y , wrap_y,16,16,mb_x*16,mb_y*16, s->width , s->height);
ptr_y= ebuf;
ff_emulated_edge_mc(ebuf+18*wrap_y , ptr_cb, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
ff_emulated_edge_mc(ebuf+18*wrap_y , ptr_cb, wrap_c, 8, mb_block_height, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
ptr_cb= ebuf+18*wrap_y;
ff_emulated_edge_mc(ebuf+18*wrap_y+8, ptr_cr, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
ff_emulated_edge_mc(ebuf+18*wrap_y+8, ptr_cr, wrap_c, 8, mb_block_height, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
ptr_cr= ebuf+18*wrap_y+8;
}
@ -4311,6 +4340,8 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
dct_offset= wrap_y;
wrap_y<<=1;
if (s->chroma_format == CHROMA_422)
wrap_c<<=1;
}
}
}
@ -4326,6 +4357,10 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
}else{
s->dsp.get_pixels(s->block[4], ptr_cb, wrap_c);
s->dsp.get_pixels(s->block[5], ptr_cr, wrap_c);
if(!s->chroma_y_shift){ /* 422 */
s->dsp.get_pixels(s->block[6], ptr_cb + (dct_offset>>1), wrap_c);
s->dsp.get_pixels(s->block[7], ptr_cr + (dct_offset>>1), wrap_c);
}
}
}else{
op_pixels_func (*op_pix)[4];
@ -4371,6 +4406,8 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
dct_offset= wrap_y;
wrap_y<<=1;
if (s->chroma_format == CHROMA_422)
wrap_c<<=1;
}
}
}
@ -4386,6 +4423,10 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
}else{
s->dsp.diff_pixels(s->block[4], ptr_cb, dest_cb, wrap_c);
s->dsp.diff_pixels(s->block[5], ptr_cr, dest_cr, wrap_c);
if(!s->chroma_y_shift){ /* 422 */
s->dsp.diff_pixels(s->block[6], ptr_cb + (dct_offset>>1), dest_cb + (dct_offset>>1), wrap_c);
s->dsp.diff_pixels(s->block[7], ptr_cr + (dct_offset>>1), dest_cr + (dct_offset>>1), wrap_c);
}
}
/* pre quantization */
if(s->current_picture.mc_mb_var[s->mb_stride*mb_y+ mb_x]<2*s->qscale*s->qscale){
@ -4396,6 +4437,10 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
if(s->dsp.sad[1](NULL, ptr_y +dct_offset+ 8, dest_y +dct_offset+ 8, wrap_y, 8) < 20*s->qscale) skip_dct[3]= 1;
if(s->dsp.sad[1](NULL, ptr_cb , dest_cb , wrap_c, 8) < 20*s->qscale) skip_dct[4]= 1;
if(s->dsp.sad[1](NULL, ptr_cr , dest_cr , wrap_c, 8) < 20*s->qscale) skip_dct[5]= 1;
if(!s->chroma_y_shift){ /* 422 */
if(s->dsp.sad[1](NULL, ptr_cb +(dct_offset>>1), dest_cb +(dct_offset>>1), wrap_c, 8) < 20*s->qscale) skip_dct[6]= 1;
if(s->dsp.sad[1](NULL, ptr_cr +(dct_offset>>1), dest_cr +(dct_offset>>1), wrap_c, 8) < 20*s->qscale) skip_dct[7]= 1;
}
}
}
@ -4406,13 +4451,17 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
if(!skip_dct[3]) get_vissual_weight(weight[3], ptr_y + dct_offset + 8, wrap_y);
if(!skip_dct[4]) get_vissual_weight(weight[4], ptr_cb , wrap_c);
if(!skip_dct[5]) get_vissual_weight(weight[5], ptr_cr , wrap_c);
memcpy(orig[0], s->block[0], sizeof(DCTELEM)*64*6);
if(!s->chroma_y_shift){ /* 422 */
if(!skip_dct[6]) get_vissual_weight(weight[6], ptr_cb + (dct_offset>>1), wrap_c);
if(!skip_dct[7]) get_vissual_weight(weight[7], ptr_cr + (dct_offset>>1), wrap_c);
}
memcpy(orig[0], s->block[0], sizeof(DCTELEM)*64*mb_block_count);
}
/* DCT & quantize */
assert(s->out_format!=FMT_MJPEG || s->qscale==8);
{
for(i=0;i<6;i++) {
for(i=0;i<mb_block_count;i++) {
if(!skip_dct[i]){
int overflow;
s->block_last_index[i] = s->dct_quantize(s, s->block[i], i, s->qscale, &overflow);
@ -4424,7 +4473,7 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
s->block_last_index[i]= -1;
}
if(s->avctx->quantizer_noise_shaping){
for(i=0;i<6;i++) {
for(i=0;i<mb_block_count;i++) {
if(!skip_dct[i]){
s->block_last_index[i] = dct_quantize_refine(s, s->block[i], weight[i], orig[i], i, s->qscale);
}
@ -4435,11 +4484,11 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
for(i=0; i<4; i++)
dct_single_coeff_elimination(s, i, s->luma_elim_threshold);
if(s->chroma_elim_threshold && !s->mb_intra)
for(i=4; i<6; i++)
for(i=4; i<mb_block_count; i++)
dct_single_coeff_elimination(s, i, s->chroma_elim_threshold);
if(s->flags & CODEC_FLAG_CBP_RD){
for(i=0;i<6;i++) {
for(i=0;i<mb_block_count;i++) {
if(s->block_last_index[i] == -1)
s->coded_score[i]= INT_MAX/256;
}
@ -4455,7 +4504,7 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
//non c quantize code returns incorrect block_last_index FIXME
if(s->alternate_scan && s->dct_quantize != dct_quantize_c){
for(i=0; i<6; i++){
for(i=0; i<mb_block_count; i++){
int j;
if(s->block_last_index[i]>0){
for(j=63; j>0; j--){
@ -4496,6 +4545,12 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
}
}
static always_inline void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
{
if (s->chroma_format == CHROMA_420) encode_mb_internal(s, motion_x, motion_y, 8, 6);
else encode_mb_internal(s, motion_x, motion_y, 16, 8);
}
#endif //CONFIG_ENCODERS
void ff_mpeg_flush(AVCodecContext *avctx){
@ -4605,7 +4660,7 @@ static inline void copy_context_after_encode(MpegEncContext *d, MpegEncContext *
d->tex_pb= s->tex_pb;
}
d->block= s->block;
for(i=0; i<6; i++)
for(i=0; i<8; i++)
d->block_last_index[i]= s->block_last_index[i];
d->interlaced_dct= s->interlaced_dct;
d->qscale= s->qscale;

2
libavcodec/mpegvideo.h
Unescape View File

@ -486,7 +486,7 @@ typedef struct MpegEncContext {
uint8_t *chroma_dc_vlc_length;
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
int coded_score[6];
int coded_score[8];
/** precomputed matrix (combine qscale and DCT renorm) */
int (*q_intra_matrix)[64];

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