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Slightly more precise calculations in finding keyframes/seeking.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34928 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2010-01-07 01:12:47 +00:00
parent 79d332bbfe
commit f947df7ded
1 changed files with 9 additions and 7 deletions
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src/add-ons/media/plugins/ffmpeg/AVFormatReader.cpp
+9 -7
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@@ -788,7 +788,7 @@ AVFormatReader::StreamCookie::Seek(uint32 flags, int64* frame,
uint32_t seekFlags = incr < 0 ? AVSEEK_FLAG_BACKWARD : 0;
pos = av_rescale_q(pos, AV_TIME_BASE_Q, fStream->time_base);
ret = av_seek_frame(fContext, Index(), pos, seekFlags);
#endif
@@ -839,17 +839,18 @@ AVFormatReader::StreamCookie::FindKeyFrame(uint32 flags, int64* frame,
if ((flags & B_MEDIA_SEEK_TO_FRAME) != 0)
*time = (bigtime_t)(*frame * 1000000LL / frameRate);
double timeBase = av_q2d(fStream->time_base);
int64_t timeStamp;
if ((flags & B_MEDIA_SEEK_TO_FRAME) != 0) {
// Can use frame, because stream timeStamp is actually in frame
// units.
timeStamp = *frame;
} else
timeStamp = (int64_t)(*time / timeBase / 1000000.0);
} else {
timeStamp = *time * fStream->time_base.num
/ ((int64_t)fStream->time_base.den * 1000000);
}
TRACE_SEEK(" time: %.2fs -> %lld (time_base: %f)\n", *time / 1000000.0,
timeStamp, timeBase);
TRACE_SEEK(" time: %.2fs -> %lld (time_base: %d/%d)\n", *time / 1000000.0,
timeStamp, fStream->time_base.num, fStream->time_base.den);
int searchFlags = AVSEEK_FLAG_BACKWARD;
if ((flags & B_MEDIA_SEEK_CLOSEST_FORWARD) != 0)
@@ -867,7 +868,8 @@ AVFormatReader::StreamCookie::FindKeyFrame(uint32 flags, int64* frame,
const AVIndexEntry& entry = fStream->index_entries[index];
timeStamp = entry.timestamp;
*time = (bigtime_t)(timeStamp * 1000000.0 * timeBase);
*time = (bigtime_t)(timeStamp * 1000000 * fStream->time_base.num
/ fStream->time_base.den);
TRACE_SEEK(" seeked time: %.2fs (%lld)\n", *time / 1000000.0, timeStamp);
if ((flags & B_MEDIA_SEEK_TO_FRAME) != 0) {