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| author | Max Kellermann <max@duempel.org> | 2014-03-18 08:19:05 +0100 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2014-03-18 09:16:09 +0100 |
| commit | ce18c36ed9328b4b5d376562594d8acb13a6723d (patch) | |
| tree | cad0dd8470923dcf4765c5d159ab5e530cd8ed19 /src/decoder/FfmpegDecoderPlugin.cxx | |
| parent | 8e39cf62e7f84eca6f8b431bf721281d50653892 (diff) | |
| download | mpd-ce18c36ed9328b4b5d376562594d8acb13a6723d.tar.gz mpd-ce18c36ed9328b4b5d376562594d8acb13a6723d.tar.xz mpd-ce18c36ed9328b4b5d376562594d8acb13a6723d.zip | |
decoder/ffmpeg: handle unknown stream start time
Diffstat (limited to 'src/decoder/FfmpegDecoderPlugin.cxx')
| -rw-r--r-- | src/decoder/FfmpegDecoderPlugin.cxx | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/src/decoder/FfmpegDecoderPlugin.cxx b/src/decoder/FfmpegDecoderPlugin.cxx index e1e848bf3..bcb1ae3c9 100644 --- a/src/decoder/FfmpegDecoderPlugin.cxx +++ b/src/decoder/FfmpegDecoderPlugin.cxx @@ -197,6 +197,29 @@ time_to_ffmpeg(double t, const AVRational time_base) time_base); } +/** + * Replace #AV_NOPTS_VALUE with the given fallback. + */ +static constexpr int64_t +timestamp_fallback(int64_t t, int64_t fallback) +{ + return gcc_likely(t != int64_t(AV_NOPTS_VALUE)) + ? t + : fallback; +} + +/** + * Accessor for AVStream::start_time that replaces AV_NOPTS_VALUE with + * zero. We can't use AV_NOPTS_VALUE in calculations, and we simply + * assume that the stream's start time is zero, which appears to be + * the best way out of that situation. + */ +static int64_t +start_time_fallback(const AVStream &stream) +{ + return timestamp_fallback(stream.start_time, 0); +} + static void copy_interleave_frame2(uint8_t *dest, uint8_t **src, unsigned nframes, unsigned nchannels, @@ -263,7 +286,7 @@ ffmpeg_send_packet(Decoder &decoder, InputStream &is, { if (packet->pts >= 0 && packet->pts != (int64_t)AV_NOPTS_VALUE) decoder_timestamp(decoder, - time_from_ffmpeg(packet->pts - stream->start_time, + time_from_ffmpeg(packet->pts - start_time_fallback(*stream), stream->time_base)); AVPacket packet2 = *packet; @@ -493,7 +516,7 @@ ffmpeg_decode(Decoder &decoder, InputStream &input) int64_t where = time_to_ffmpeg(decoder_seek_where(decoder), av_stream->time_base) + - av_stream->start_time; + start_time_fallback(*av_stream); if (av_seek_frame(format_context, audio_stream, where, AVSEEK_FLAG_ANY) < 0) |