Merge remote-tracking branch 'qatar/master'
[ffmpeg.git] / libavcodec / h263dec.c
index 9df6fba..ac2aeaf 100644 (file)
@@ -25,6 +25,8 @@
  * H.263 decoder.
  */
 
+#define UNCHECKED_BITSTREAM_READER 1
+
 #include "libavutil/cpu.h"
 #include "internal.h"
 #include "avcodec.h"
@@ -54,7 +56,7 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx)
     s->workaround_bugs= avctx->workaround_bugs;
 
     // set defaults
-    MPV_decode_defaults(s);
+    ff_MPV_decode_defaults(s);
     s->quant_precision=5;
     s->decode_mb= ff_h263_decode_mb;
     s->low_delay= 1;
@@ -91,6 +93,8 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx)
         break;
     case CODEC_ID_VC1:
     case CODEC_ID_WMV3:
+    case CODEC_ID_VC1IMAGE:
+    case CODEC_ID_WMV3IMAGE:
         s->h263_pred = 1;
         s->msmpeg4_version=6;
         avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
@@ -108,10 +112,10 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx)
 
     /* for h263, we allocate the images after having read the header */
     if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
-        if (MPV_common_init(s) < 0)
+        if (ff_MPV_common_init(s) < 0)
             return -1;
 
-        h263_decode_init_vlc(s);
+        ff_h263_decode_init_vlc(s);
 
     return 0;
 }
@@ -120,12 +124,12 @@ av_cold int ff_h263_decode_end(AVCodecContext *avctx)
 {
     MpegEncContext *s = avctx->priv_data;
 
-    MPV_common_end(s);
+    ff_MPV_common_end(s);
     return 0;
 }
 
 /**
- * returns the number of bytes consumed for building the current frame
+ * Return the number of bytes consumed for building the current frame.
  */
 static int get_consumed_bytes(MpegEncContext *s, int buf_size){
     int pos= (get_bits_count(&s->gb)+7)>>3;
@@ -146,7 +150,7 @@ static int get_consumed_bytes(MpegEncContext *s, int buf_size){
 }
 
 static int decode_slice(MpegEncContext *s){
-    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
+    const int part_mask= s->partitioned_frame ? (ER_AC_END|ER_AC_ERROR) : 0x7F;
     const int mb_size= 16>>s->avctx->lowres;
     s->last_resync_gb= s->gb;
     s->first_slice_line= 1;
@@ -182,7 +186,7 @@ static int decode_slice(MpegEncContext *s){
         /* per-row end of slice checks */
         if(s->msmpeg4_version){
             if(s->resync_mb_y + s->slice_height == s->mb_y){
-                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
+                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
 
                 return 0;
             }
@@ -218,40 +222,40 @@ static int decode_slice(MpegEncContext *s){
             if(ret<0){
                 const int xy= s->mb_x + s->mb_y*s->mb_stride;
                 if(ret==SLICE_END){
-                    MPV_decode_mb(s, s->block);
+                    ff_MPV_decode_mb(s, s->block);
                     if(s->loop_filter)
                         ff_h263_loop_filter(s);
 
 //printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
-                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_MB_END&part_mask);
 
                     s->padding_bug_score--;
 
                     if(++s->mb_x >= s->mb_width){
                         s->mb_x=0;
                         ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
-                        MPV_report_decode_progress(s);
+                        ff_MPV_report_decode_progress(s);
                         s->mb_y++;
                     }
                     return 0;
                 }else if(ret==SLICE_NOEND){
                     av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
-                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, ER_MB_END&part_mask);
                     return -1;
                 }
                 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
-                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
+                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR&part_mask);
 
                 return -1;
             }
 
-            MPV_decode_mb(s, s->block);
+            ff_MPV_decode_mb(s, s->block);
             if(s->loop_filter)
                 ff_h263_loop_filter(s);
         }
 
         ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
-        MPV_report_decode_progress(s);
+        ff_MPV_report_decode_progress(s);
 
         s->mb_x= 0;
     }
@@ -308,7 +312,7 @@ static int decode_slice(MpegEncContext *s){
             max_extra+= 17;
 
         /* buggy padding but the frame should still end approximately at the bitstream end */
-        if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_recognition>=3)
+        if((s->workaround_bugs&FF_BUG_NO_PADDING) && (s->err_recognition&(AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
             max_extra+= 48;
         else if((s->workaround_bugs&FF_BUG_NO_PADDING))
             max_extra+= 256*256*256*64;
@@ -319,7 +323,7 @@ static int decode_slice(MpegEncContext *s){
         else if(left<0){
             av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
         }else
-            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
+            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
 
         return 0;
     }
@@ -328,7 +332,7 @@ static int decode_slice(MpegEncContext *s){
             get_bits_left(&s->gb),
             show_bits(&s->gb, 24), s->padding_bug_score);
 
-    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_MB_END&part_mask);
 
     return -1;
 }
@@ -380,7 +384,7 @@ uint64_t time= rdtsc();
 
 
 retry:
-    if(s->divx_packed && s->xvid_build>=0 && s->bitstream_buffer_size){
+    if(s->divx_packed && s->bitstream_buffer_size){
         int i;
         for(i=0; i<buf_size-3; i++){
             if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1){
@@ -400,7 +404,7 @@ retry:
     s->bitstream_buffer_size=0;
 
     if (!s->context_initialized) {
-        if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
+        if (ff_MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
             return -1;
     }
 
@@ -408,6 +412,8 @@ retry:
      * otherwise we cannot store anyting in there */
     if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {
         int i= ff_find_unused_picture(s, 0);
+        if (i < 0)
+            return i;
         s->current_picture_ptr= &s->picture[i];
     }
 
@@ -415,7 +421,7 @@ retry:
     if (CONFIG_WMV2_DECODER && s->msmpeg4_version==5) {
         ret= ff_wmv2_decode_picture_header(s);
     } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
-        ret = msmpeg4_decode_picture_header(s);
+        ret = ff_msmpeg4_decode_picture_header(s);
     } else if (CONFIG_MPEG4_DECODER && s->h263_pred) {
         if(s->avctx->extradata_size && s->picture_number==0){
             GetBitContext gb;
@@ -429,7 +435,7 @@ retry:
     } else if (CONFIG_FLV_DECODER && s->h263_flv) {
         ret = ff_flv_decode_picture_header(s);
     } else {
-        ret = h263_decode_picture_header(s);
+        ret = ff_h263_decode_picture_header(s);
     }
 
     if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_size);
@@ -564,8 +570,7 @@ retry:
 #if HAVE_MMX
     if (s->codec_id == CODEC_ID_MPEG4 && s->xvid_build>=0 && avctx->idct_algo == FF_IDCT_AUTO && (av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
         avctx->idct_algo= FF_IDCT_XVIDMMX;
-        avctx->coded_width= 0; // force reinit
-//        dsputil_init(&s->dsp, avctx);
+        ff_dct_common_init(s);
         s->picture_number=0;
     }
 #endif
@@ -579,8 +584,14 @@ retry:
         || s->height != avctx->coded_height) {
         /* H.263 could change picture size any time */
         ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat
+
+        if (HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_FRAME)) {
+            av_log_missing_feature(s->avctx, "Width/height/bit depth/chroma idc changing with threads is", 0);
+            return -1;   // width / height changed during parallelized decoding
+        }
+
         s->parse_context.buffer=0;
-        MPV_common_end(s);
+        ff_MPV_common_end(s);
         s->parse_context= pc;
     }
     if (!s->context_initialized) {
@@ -621,7 +632,7 @@ retry:
         s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
     }
 
-    if(MPV_frame_start(s, avctx) < 0)
+    if(ff_MPV_frame_start(s, avctx) < 0)
         return -1;
 
     if (!s->divx_packed) ff_thread_finish_setup(avctx);
@@ -639,7 +650,7 @@ retry:
     ff_er_frame_start(s);
 
     //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
-    //which is not available before MPV_frame_start()
+    //which is not available before ff_MPV_frame_start()
     if (CONFIG_WMV2_DECODER && s->msmpeg4_version==5){
         ret = ff_wmv2_decode_secondary_picture_header(s);
         if(ret<0) return ret;
@@ -670,8 +681,8 @@ retry:
     }
 
     if (s->msmpeg4_version && s->msmpeg4_version<4 && s->pict_type==AV_PICTURE_TYPE_I)
-        if(!CONFIG_MSMPEG4_DECODER || msmpeg4_decode_ext_header(s, buf_size) < 0){
-            s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
+        if(!CONFIG_MSMPEG4_DECODER || ff_msmpeg4_decode_ext_header(s, buf_size) < 0){
+            s->error_status_table[s->mb_num-1]= ER_MB_ERROR;
         }
 
     assert(s->bitstream_buffer_size==0);
@@ -681,7 +692,7 @@ frame_end:
         int current_pos= s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb)>>3);
         int startcode_found=0;
 
-        if(buf_size - current_pos > 5){
+        if(buf_size - current_pos > 7){
             int i;
             for(i=current_pos; i<buf_size-4; i++){
                 if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
@@ -711,7 +722,7 @@ intrax8_decoded:
             return -1;
     }
 
-    MPV_frame_end(s);
+    ff_MPV_frame_end(s);
 
     assert(s->current_picture.f.pict_type == s->current_picture_ptr->f.pict_type);
     assert(s->current_picture.f.pict_type == s->pict_type);
@@ -730,7 +741,7 @@ intrax8_decoded:
 av_log(avctx, AV_LOG_DEBUG, "%"PRId64"\n", rdtsc()-time);
 #endif
 
-    return (ret && avctx->error_recognition >= FF_ER_EXPLODE)?ret:get_consumed_bytes(s, buf_size);
+    return (ret && (avctx->err_recognition & AV_EF_EXPLODE))?ret:get_consumed_bytes(s, buf_size);
 }
 
 AVCodec ff_h263_decoder = {