Merge remote-tracking branch 'qatar/master'
[ffmpeg.git] / libavcodec / mpeg4videodec.c
index b2a0187..5387064 100644 (file)
@@ -130,10 +130,11 @@ static inline int mpeg4_is_resync(MpegEncContext *s){
         v|= 0x7F >> (7-(bits_count&7));
 
         if(v==0x7F)
-            return 1;
+            return s->mb_num;
     }else{
         if(v == ff_mpeg4_resync_prefix[bits_count&7]){
-            int len;
+            int len, mb_num;
+            int mb_num_bits= av_log2(s->mb_num - 1) + 1;
             GetBitContext gb= s->gb;
 
             skip_bits(&s->gb, 1);
@@ -143,10 +144,14 @@ static inline int mpeg4_is_resync(MpegEncContext *s){
                 if(get_bits1(&s->gb)) break;
             }
 
+            mb_num= get_bits(&s->gb, mb_num_bits);
+            if(!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits)
+                mb_num= -1;
+
             s->gb= gb;
 
             if(len>=ff_mpeg4_get_video_packet_prefix_length(s))
-                return 1;
+                return mb_num;
         }
     }
     return 0;
@@ -373,16 +378,6 @@ int mpeg4_decode_video_packet_header(MpegEncContext *s)
         av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
         return -1;
     }
-    if(s->pict_type == AV_PICTURE_TYPE_B){
-        int mb_x = 0, mb_y = 0;
-
-        while (s->next_picture.f.mbskip_table[s->mb_index2xy[mb_num]]) {
-            if (!mb_x) ff_thread_await_progress((AVFrame*)s->next_picture_ptr, mb_y++, 0);
-            mb_num++;
-            if (++mb_x == s->mb_width) mb_x = 0;
-        }
-        if(mb_num >= s->mb_num) return -1; // slice contains just skipped MBs which where already decoded
-    }
 
     s->mb_x= mb_num % s->mb_width;
     s->mb_y= mb_num / s->mb_width;
@@ -1488,16 +1483,21 @@ end:
 
         /* per-MB end of slice check */
     if(s->codec_id==CODEC_ID_MPEG4){
-        if(mpeg4_is_resync(s)){
-            const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
+        int next= mpeg4_is_resync(s);
+        if(next) {
+            if        (s->mb_x + s->mb_y*s->mb_width + 1 >  next && s->avctx->error_recognition >= FF_ER_AGGRESSIVE) {
+                return -1;
+            } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
+                return SLICE_END;
 
             if(s->pict_type==AV_PICTURE_TYPE_B){
+                const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
                 ff_thread_await_progress((AVFrame*)s->next_picture_ptr,
                                         (s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0);
+                if (s->next_picture.f.mbskip_table[xy + delta])
+                    return SLICE_OK;
             }
 
-            if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture.f.mbskip_table[xy + delta])
-                return SLICE_OK;
             return SLICE_END;
         }
     }
@@ -1527,6 +1527,19 @@ static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
     return 0;
 }
 
+static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){
+
+    s->avctx->profile = get_bits(gb, 4);
+    s->avctx->level   = get_bits(gb, 4);
+
+    // for Simple profile, level 0
+    if (s->avctx->profile == 0 && s->avctx->level == 8) {
+        s->avctx->level = 0;
+    }
+
+    return 0;
+}
+
 static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
     int width, height, vo_ver_id;
 
@@ -2111,7 +2124,7 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
  */
 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
 {
-    int startcode, v;
+    unsigned startcode, v;
 
     /* search next start code */
     align_get_bits(gb);
@@ -2181,6 +2194,9 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
         else if(startcode == GOP_STARTCODE){
             mpeg4_decode_gop_header(s, gb);
         }
+        else if(startcode == VOS_STARTCODE){
+            mpeg4_decode_profile_level(s, gb);
+        }
         else if(startcode == VOP_STARTCODE){
             break;
         }
@@ -2241,35 +2257,53 @@ static av_cold int decode_init(AVCodecContext *avctx)
     return 0;
 }
 
+static const AVProfile mpeg4_video_profiles[] = {
+    { FF_PROFILE_MPEG4_SIMPLE,                    "Simple Profile" },
+    { FF_PROFILE_MPEG4_SIMPLE_SCALABLE,           "Simple Scalable Profile" },
+    { FF_PROFILE_MPEG4_CORE,                      "Core Profile" },
+    { FF_PROFILE_MPEG4_MAIN,                      "Main Profile" },
+    { FF_PROFILE_MPEG4_N_BIT,                     "N-bit Profile" },
+    { FF_PROFILE_MPEG4_SCALABLE_TEXTURE,          "Scalable Texture Profile" },
+    { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION,     "Simple Face Animation Profile" },
+    { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE,    "Basic Animated Texture Profile" },
+    { FF_PROFILE_MPEG4_HYBRID,                    "Hybrid Profile" },
+    { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME,        "Advanced Real Time Simple Profile" },
+    { FF_PROFILE_MPEG4_CORE_SCALABLE,             "Code Scalable Profile" },
+    { FF_PROFILE_MPEG4_ADVANCED_CODING,           "Advanced Coding Profile" },
+    { FF_PROFILE_MPEG4_ADVANCED_CORE,             "Advanced Core Profile" },
+    { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
+    { FF_PROFILE_MPEG4_SIMPLE_STUDIO,             "Simple Studio Profile" },
+    { FF_PROFILE_MPEG4_ADVANCED_SIMPLE,           "Advanced Simple Profile" },
+};
+
 AVCodec ff_mpeg4_decoder = {
-    "mpeg4",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_MPEG4,
-    sizeof(MpegEncContext),
-    decode_init,
-    NULL,
-    ff_h263_decode_end,
-    ff_h263_decode_frame,
-    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS,
+    .name           = "mpeg4",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_MPEG4,
+    .priv_data_size = sizeof(MpegEncContext),
+    .init           = decode_init,
+    .close          = ff_h263_decode_end,
+    .decode         = ff_h263_decode_frame,
+    .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS,
     .flush= ff_mpeg_flush,
     .max_lowres= 3,
     .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
     .pix_fmts= ff_hwaccel_pixfmt_list_420,
+    .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
     .update_thread_context= ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context)
 };
 
 
 #if CONFIG_MPEG4_VDPAU_DECODER
 AVCodec ff_mpeg4_vdpau_decoder = {
-    "mpeg4_vdpau",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_MPEG4,
-    sizeof(MpegEncContext),
-    decode_init,
-    NULL,
-    ff_h263_decode_end,
-    ff_h263_decode_frame,
-    CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
+    .name           = "mpeg4_vdpau",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_MPEG4,
+    .priv_data_size = sizeof(MpegEncContext),
+    .init           = decode_init,
+    .close          = ff_h263_decode_end,
+    .decode         = ff_h263_decode_frame,
+    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
     .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"),
     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_VDPAU_MPEG4, PIX_FMT_NONE},
 };