MPEG-2 4:2:2 encoding support

Originally committed as revision 5387 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -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:
 

libavcodec/mpeg12.c

@@ -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

libavcodec/mpegvideo.c

@@ -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;

libavcodec/mpegvideo.h

@@ -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];