From 0ff4f0c0fc31974e315b657eb64494c37d178025 Mon Sep 17 00:00:00 2001
From: Alexander Strange <astrange@ithinksw.com>
Date: Sun, 10 Oct 2010 02:17:26 +0000
Subject: [PATCH] ffmpeg: Use guess_correct_pts() to set decoded picture
 timestamps

Originally committed as revision 25431 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffmpeg.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ffmpeg.c b/ffmpeg.c
index 8519159bd5..e0463a996e 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -312,6 +312,7 @@ typedef struct AVInputStream {
     int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
                                 is not defined */
     int64_t       pts;       /* current pts */
+    PtsCorrectionContext pts_ctx;
     int is_start;            /* is 1 at the start and after a discontinuity */
     int showed_multi_packet_warning;
     int is_past_recording_time;
@@ -1542,6 +1543,7 @@ static int output_packet(AVInputStream *ist, int ist_index,
     void *buffer_to_free;
     static unsigned int samples_size= 0;
     AVSubtitle subtitle, *subtitle_to_free;
+    int64_t pkt_pts = AV_NOPTS_VALUE;
 #if CONFIG_AVFILTER
     int frame_available;
 #endif
@@ -1564,6 +1566,8 @@ static int output_packet(AVInputStream *ist, int ist_index,
 
     if(pkt->dts != AV_NOPTS_VALUE)
         ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
+    if(pkt->pts != AV_NOPTS_VALUE)
+        pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);
 
     //while we have more to decode or while the decoder did output something on EOF
     while (avpkt.size > 0 || (!pkt && ist->next_pts != ist->pts)) {
@@ -1616,6 +1620,8 @@ static int output_packet(AVInputStream *ist, int ist_index,
                     decoded_data_size = (ist->st->codec->width * ist->st->codec->height * 3) / 2;
                     /* XXX: allocate picture correctly */
                     avcodec_get_frame_defaults(&picture);
+                    ist->st->codec->reordered_opaque = pkt_pts;
+                    pkt_pts = AV_NOPTS_VALUE;
 
                     ret = avcodec_decode_video2(ist->st->codec,
                                                 &picture, &got_picture, &avpkt);
@@ -1626,6 +1632,7 @@ static int output_packet(AVInputStream *ist, int ist_index,
                         /* no picture yet */
                         goto discard_packet;
                     }
+                    ist->next_pts = ist->pts = guess_correct_pts(&ist->pts_ctx, picture.reordered_opaque, ist->pts);
                     if (ist->st->codec->time_base.num != 0) {
                         int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                         ist->next_pts += ((int64_t)AV_TIME_BASE *
@@ -2414,6 +2421,7 @@ static int transcode(AVFormatContext **output_files,
         st= ist->st;
         ist->pts = st->avg_frame_rate.num ? - st->codec->has_b_frames*AV_TIME_BASE / av_q2d(st->avg_frame_rate) : 0;
         ist->next_pts = AV_NOPTS_VALUE;
+        init_pts_correction(&ist->pts_ctx);
         ist->is_start = 1;
     }