skip_idct

skip_frame
skip_loop_filter

Originally committed as revision 4440 to svn://svn.ffmpeg.org/ffmpeg/trunk

8 files changed, 73 insertions, 6 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 9656926c05..8b113cd4d0 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -17,7 +17,8 @@ extern "C" {
 
 #define FFMPEG_VERSION_INT     0x000409
 #define FFMPEG_VERSION         "CVS"
-#define LIBAVCODEC_BUILD       4757
+#define LIBAVCODEC_BUILD       4758
+
 
 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
 #define LIBAVCODEC_VERSION     FFMPEG_VERSION
@@ -284,6 +285,16 @@ enum AVRounding {
     AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
 };
 
+enum AVDiscard{
+//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
+    AVDISCARD_NONE   =-16, ///< discard nothing
+    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
+    AVDISCARD_NONREF =  8, ///< discard all non reference
+    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
+    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
+    AVDISCARD_ALL    = 48, ///< discard all
+};
+
 typedef struct RcOverride{
     int start_frame;
     int end_frame;
@@ -858,6 +869,7 @@ typedef struct AVCodecContext {
 
     /**
      * hurry up amount.
+     * deprecated in favor of skip_idct and skip_frame
      * - encoding: unused
      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
      */
@@ -1807,6 +1819,27 @@ typedef struct AVCodecContext {
      * - decoding: unused
      */
     int me_penalty_compensation;
+
+    /**
+     * 
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_loop_filter;
+
+    /**
+     * 
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_idct;
+
+    /**
+     * 
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_frame;
 } AVCodecContext;
 
 
diff --git a/libavcodec/h261.c b/libavcodec/h261.c
index f9e148455c..a823cc39bc 100644
--- a/libavcodec/h261.c
+++ b/libavcodec/h261.c
@@ -970,6 +970,10 @@ retry:
 
     /* skip everything if we are in a hurry>=5 */
     if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
+    if(  (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
+       ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
+       || avctx->skip_frame >= AVDISCARD_ALL)
+        return get_consumed_bytes(s, buf_size);
 
     if(MPV_frame_start(s, avctx) < 0)
         return -1;
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index ba105564f2..b51ce5f0c4 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -673,6 +673,10 @@ retry:
     if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return get_consumed_bytes(s, buf_size);
     /* skip b frames if we are in a hurry */
     if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
+    if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
+       || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
+       ||  avctx->skip_frame >= AVDISCARD_ALL) 
+        return get_consumed_bytes(s, buf_size);
     /* skip everything if we are in a hurry>=5 */
     if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
     
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 741c0503c6..3e318bddeb 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -4349,6 +4349,11 @@ static int decode_slice_header(H264Context *h){
             h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
         }
     }
+    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
+       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type != I_TYPE)
+       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type == B_TYPE)
+       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
+        h->deblocking_filter= 0;
 
 #if 0 //FMO
     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
@@ -7245,7 +7250,8 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
 
         buf_index += consumed;
 
-        if( s->hurry_up == 1 && h->nal_ref_idc  == 0 )
+        if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0)
+           ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
             continue;
         
         switch(h->nal_unit_type){
@@ -7261,7 +7267,7 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
                 av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
                 break;
             }
-            if(h->redundant_pic_count==0 && s->hurry_up < 5 )
+            if(h->redundant_pic_count==0 && s->hurry_up < 5 && avctx->skip_frame < AVDISCARD_ALL)
                 decode_slice(h);
             break;
         case NAL_DPA:
@@ -7282,7 +7288,8 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
             init_get_bits(&h->inter_gb, ptr, bit_length);
             h->inter_gb_ptr= &h->inter_gb;
 
-            if(h->redundant_pic_count==0 && h->intra_gb_ptr && s->data_partitioning && s->hurry_up < 5 )
+            if(h->redundant_pic_count==0 && h->intra_gb_ptr && s->data_partitioning 
+               && s->hurry_up < 5 && avctx->skip_frame < AVDISCARD_ALL)
                 decode_slice(h);
             break;
         case NAL_SEI:
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 33fc2faa75..a609ee34e5 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -3086,7 +3086,7 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
         /* find start next code */
         start_code = find_start_code(&buf_ptr, buf_end);
         if (start_code < 0){
-            if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
+            if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
                 if(avctx->thread_count > 1){
                     int i;
 
@@ -3146,6 +3146,10 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
                         }
                         /* skip b frames if we are in a hurry */
                         if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
+                        if(  (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
+                           ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
+                           || avctx->skip_frame >= AVDISCARD_ALL)
+                            break;
                         /* skip everything if we are in a hurry>=5 */
                         if(avctx->hurry_up>=5) break;
                         
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index b767c7d554..a6017136e1 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -3777,7 +3777,13 @@ static always_inline void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM bloc
             }
 
             /* skip dequant / idct if we are really late ;) */
-            if(s->hurry_up>1) return;
+            if(s->hurry_up>1) goto skip_idct;
+            if(s->avctx->skip_idct){
+                if(  (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == B_TYPE)
+                   ||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != I_TYPE)
+                   || s->avctx->skip_idct >= AVDISCARD_ALL)
+                    goto skip_idct;
+            }
 
             /* add dct residue */
             if(s->encoding || !(   s->h263_msmpeg4 || s->codec_id==CODEC_ID_MPEG1VIDEO || s->codec_id==CODEC_ID_MPEG2VIDEO
@@ -3863,6 +3869,7 @@ static always_inline void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM bloc
                 }//gray
             }
         }
+skip_idct:
         if(!readable){
             s->dsp.put_pixels_tab[0][0](s->dest[0], dest_y ,   linesize,16);
             s->dsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
diff --git a/libavcodec/svq1.c b/libavcodec/svq1.c
index 068dd51d37..e59f1c731b 100644
--- a/libavcodec/svq1.c
+++ b/libavcodec/svq1.c
@@ -748,6 +748,10 @@ static int svq1_decode_frame(AVCodecContext *avctx,
   if(s->pict_type==B_TYPE && s->last_picture_ptr==NULL) return buf_size;
   
   if(avctx->hurry_up && s->pict_type==B_TYPE) return buf_size;
+  if(  (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
+     ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
+     || avctx->skip_frame >= AVDISCARD_ALL)
+      return buf_size;                            
 
   if(MPV_frame_start(s, avctx) < 0)
       return -1;
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 547679bf1c..f0f995acfa 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -896,6 +896,10 @@ static int svq3_decode_frame (AVCodecContext *avctx,
   if (avctx->hurry_up && s->pict_type == B_TYPE) return 0;
   /* skip everything if we are in a hurry >= 5 */
   if (avctx->hurry_up >= 5) return 0;
+  if(  (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
+     ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
+     || avctx->skip_frame >= AVDISCARD_ALL)
+      return 0;
 
   if (s->next_p_frame_damaged) {
     if (s->pict_type == B_TYPE)