Implement avcodec_decode_video2(), _audio3() and _subtitle2() which takes an

AVPacket argument rather than a const uint8_t *buf + int buf_size. This allows
passing of packet-specific flags from demuxer to decoder, such as the keyframe
flag, which appears necessary to playback corePNG P-frames.

Patch by Thilo Borgmann thilo.borgmann googlemail com, see also the thread
"Google Summer of Code participation" on the mailinglist.

Originally committed as revision 18351 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 47 insertions, 7 deletions

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 4113382997..f39b49d511 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -524,18 +524,32 @@ int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
     return ret;
 }
 
+#if LIBAVCODEC_VERSION_MAJOR < 53
 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
                          int *got_picture_ptr,
                          const uint8_t *buf, int buf_size)
 {
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+
+    return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
+}
+#endif
+
+int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
+                         int *got_picture_ptr,
+                         AVPacket *avpkt)
+{
     int ret;
 
     *got_picture_ptr= 0;
     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
         return -1;
-    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
-                                buf, buf_size);
+                                avpkt);
 
         emms_c(); //needed to avoid an emms_c() call before every return;
 
@@ -547,13 +561,27 @@ int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *pic
     return ret;
 }
 
+#if LIBAVCODEC_VERSION_MAJOR < 53
 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
                          int *frame_size_ptr,
                          const uint8_t *buf, int buf_size)
 {
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+
+    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
+}
+#endif
+
+int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+                         int *frame_size_ptr,
+                         AVPacket *avpkt)
+{
     int ret;
 
-    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
@@ -565,8 +593,7 @@ int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *sa
             return -1;
         }
 
-        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
-                                buf, buf_size);
+        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
         avctx->frame_number++;
     }else{
         ret= 0;
@@ -575,15 +602,28 @@ int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *sa
     return ret;
 }
 
+#if LIBAVCODEC_VERSION_MAJOR < 53
 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
                             int *got_sub_ptr,
                             const uint8_t *buf, int buf_size)
 {
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+
+    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
+}
+#endif
+
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+                            int *got_sub_ptr,
+                            AVPacket *avpkt)
+{
     int ret;
 
     *got_sub_ptr = 0;
-    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
-                               buf, buf_size);
+    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
     if (*got_sub_ptr)
         avctx->frame_number++;
     return ret;