Merge commit 'd9a2e87b'

* commit 'd9a2e87b':
  mpeg12: move mpeg_decode_frame() lower
  avsdec: Set dimensions instead of relying on the demuxer.
  wmalosslessdec: Reset put bit buffer when num_saved_bits is reset.

Conflicts:
	libavcodec/avs.c
	libavcodec/mpeg12.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpeg12.c

@@ -2240,62 +2240,6 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size,
     return END_NOT_FOUND;
 }
 
-static int decode_chunks(AVCodecContext *avctx,
-                         AVFrame *picture, int *data_size,
-                         const uint8_t *buf, int buf_size);
-
-/* handle buffering and image synchronisation */
-static int mpeg_decode_frame(AVCodecContext *avctx,
-                             void *data, int *data_size,
-                             AVPacket *avpkt)
-{
-    const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
-    Mpeg1Context *s = avctx->priv_data;
-    AVFrame *picture = data;
-    MpegEncContext *s2 = &s->mpeg_enc_ctx;
-    av_dlog(avctx, "fill_buffer\n");
-
-    if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
-        /* special case for last picture */
-        if (s2->low_delay == 0 && s2->next_picture_ptr) {
-            *picture = s2->next_picture_ptr->f;
-            s2->next_picture_ptr = NULL;
-
-            *data_size = sizeof(AVFrame);
-        }
-        return buf_size;
-    }
-
-    if (s2->flags & CODEC_FLAG_TRUNCATED) {
-        int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
-
-        if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
-            return buf_size;
-    }
-
-    s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
-    if (s->mpeg_enc_ctx_allocated == 0 && (   s2->codec_tag == AV_RL32("VCR2")
-                                           || s2->codec_tag == AV_RL32("BW10")
-                                          ))
-        vcr2_init_sequence(avctx);
-
-    s->slice_count = 0;
-
-    if (avctx->extradata && !s->parsed_extra) {
-        int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
-        if(*data_size) {
-            av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
-            *data_size = 0;
-        }
-        s->parsed_extra = 1;
-        if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
-            return ret;
-    }
-
-    return decode_chunks(avctx, picture, data_size, buf, buf_size);
-}
-
 static int decode_chunks(AVCodecContext *avctx,
                          AVFrame *picture, int *data_size,
                          const uint8_t *buf, int buf_size)
@@ -2564,6 +2508,58 @@ static int decode_chunks(AVCodecContext *avctx,
     }
 }
 
+static int mpeg_decode_frame(AVCodecContext *avctx,
+                             void *data, int *data_size,
+                             AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    Mpeg1Context *s = avctx->priv_data;
+    AVFrame *picture = data;
+    MpegEncContext *s2 = &s->mpeg_enc_ctx;
+    av_dlog(avctx, "fill_buffer\n");
+
+    if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
+        /* special case for last picture */
+        if (s2->low_delay == 0 && s2->next_picture_ptr) {
+            *picture = s2->next_picture_ptr->f;
+            s2->next_picture_ptr = NULL;
+
+            *data_size = sizeof(AVFrame);
+        }
+        return buf_size;
+    }
+
+    if (s2->flags & CODEC_FLAG_TRUNCATED) {
+        int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
+
+        if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
+            return buf_size;
+    }
+
+    s2->codec_tag = avpriv_toupper4(avctx->codec_tag);
+    if (s->mpeg_enc_ctx_allocated == 0 && (   s2->codec_tag == AV_RL32("VCR2")
+                                           || s2->codec_tag == AV_RL32("BW10")
+                                          ))
+        vcr2_init_sequence(avctx);
+
+    s->slice_count = 0;
+
+    if (avctx->extradata && !s->parsed_extra) {
+        int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
+        if(*data_size) {
+            av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
+            *data_size = 0;
+        }
+        s->parsed_extra = 1;
+        if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
+            return ret;
+    }
+
+    return decode_chunks(avctx, picture, data_size, buf, buf_size);
+}
+
+
 static void flush(AVCodecContext *avctx)
 {
     Mpeg1Context *s = avctx->priv_data;

libavcodec/wmalosslessdec.c

@@ -1229,8 +1229,8 @@ static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
             /* Reset number of saved bits so that the decoder does not start
              * to decode incomplete frames in the s->len_prefix == 0 case. */
             s->num_saved_bits = 0;
-            init_put_bits(&s->pb, s->frame_data, MAX_FRAMESIZE);
             s->packet_loss    = 0;
+            init_put_bits(&s->pb, s->frame_data, MAX_FRAMESIZE);
         }
 
     } else {
@@ -1279,11 +1279,11 @@ static void flush(AVCodecContext *avctx)
     s->packet_loss       = 1;
     s->packet_done       = 0;
     s->num_saved_bits    = 0;
-    init_put_bits(&s->pb, s->frame_data, MAX_FRAMESIZE);
     s->frame_offset      = 0;
     s->next_packet_start = 0;
     s->cdlms[0][0].order = 0;
     s->frame.nb_samples  = 0;
+    init_put_bits(&s->pb, s->frame_data, MAX_FRAMESIZE);
 }
 
 AVCodec ff_wmalossless_decoder = {