[FFmpeg-cvslog] lavf: fix av_find_best_stream when providing a wanted stream.
Marton Balint
git at videolan.org
Fri May 13 04:46:01 CEST 2011
ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Sun Feb 20 01:18:30 2011 +0100| [2c7158169859eb2dd49a72337f9f3f28347da77a] | committer: Anton Khirnov
lavf: fix av_find_best_stream when providing a wanted stream.
In the main loop, stream_number is incremented after checking the stream type,
so the search usually will not find the wanted stream.
This patch eliminates the useless stream_number variable and introduces a new
one, called real_stream_index to store the real stream index of the current
stream, no matter if we are looping through all the streams or only the streams
of a program.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
Signed-off-by: Anton Khirnov <anton at khirnov.net>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2c7158169859eb2dd49a72337f9f3f28347da77a
---
libavformat/utils.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 830e5d0..2afac16 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2462,7 +2462,7 @@ int av_find_best_stream(AVFormatContext *ic,
AVCodec **decoder_ret,
int flags)
{
- int i, nb_streams = ic->nb_streams, stream_number = 0;
+ int i, nb_streams = ic->nb_streams;
int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
unsigned *program = NULL;
AVCodec *decoder = NULL, *best_decoder = NULL;
@@ -2475,11 +2475,12 @@ int av_find_best_stream(AVFormatContext *ic,
}
}
for (i = 0; i < nb_streams; i++) {
- AVStream *st = ic->streams[program ? program[i] : i];
+ int real_stream_index = program ? program[i] : i;
+ AVStream *st = ic->streams[real_stream_index];
AVCodecContext *avctx = st->codec;
if (avctx->codec_type != type)
continue;
- if (wanted_stream_nb >= 0 && stream_number++ != wanted_stream_nb)
+ if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
continue;
if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
continue;
@@ -2494,7 +2495,7 @@ int av_find_best_stream(AVFormatContext *ic,
if (best_count >= st->codec_info_nb_frames)
continue;
best_count = st->codec_info_nb_frames;
- ret = program ? program[i] : i;
+ ret = real_stream_index;
best_decoder = decoder;
if (program && i == nb_streams - 1 && ret < 0) {
program = NULL;
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