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yay for fake seeking

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5780 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
shatty
2003-12-28 06:44:25 +00:00
parent c68b568d9b
commit e6fb4d8f4d
1 changed files with 28 additions and 17 deletions
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src/add-ons/media/plugins/ogg/OggReaderPlugin.cpp
+28 -17
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@@ -98,12 +98,8 @@ oggReader::GetPage(ogg_page * page, int read_size, bool short_page)
#ifdef STRICT_OGG
return B_ERROR;
#else
if (ogg_stream_clear(fStreams[serialno]) != 0) {
TRACE("oggReader::GetPage: ogg_stream_destroy failed?: error\n");
return B_ERROR;
}
if (ogg_stream_init(fStreams[serialno],serialno) != 0) {
TRACE("oggReader::GetPage: ogg_stream_init failed?: error\n");
if (ogg_stream_reset(fStreams[serialno]) != 0) {
TRACE("oggReader::GetPage: ogg_stream_reset failed?: error\n");
return B_ERROR;
}
#endif
@@ -222,6 +218,21 @@ oggReader::FreeCookie(void *cookie)
return B_OK;
}
// estimate: 1 frame = 256 bytes
int filePositionToFrame(int position) {
return position/256;
}
int frameToFilePosition(int frame) {
return frame*256;
}
// estimate: 1 second = 8 bytes
int filePositionToTime(int position) {
return position*1000/8;
}
int timeToFilePosition(int duration) {
return duration*8/1000;
}
status_t
oggReader::GetStreamInfo(void *cookie, int64 *frameCount, bigtime_t *duration,
@@ -237,8 +248,8 @@ oggReader::GetStreamInfo(void *cookie, int64 *frameCount, bigtime_t *duration,
input_length = fSeekable->Seek(0,SEEK_END);
fSeekable->Seek(current_position,SEEK_SET);
}
*frameCount = input_length/256; // estimate: 1 frame = 256 bytes
*duration = input_length*1000/8; // estimate: 1 second = 8 bytes
*frameCount = filePositionToFrame(input_length);
*duration = filePositionToTime(input_length);
} else {
assert(sizeof(bigtime_t)==sizeof(uint64_t));
// if the input is not seekable, we return really large sizes
@@ -258,8 +269,6 @@ oggReader::Seek(void *cookie,
int64 *frame, bigtime_t *time)
{
TRACE("oggReader::Seek\n");
return B_OK;
debugger("oggReader::Seek");
if (!fSeekable) {
TRACE("oggReader::Seek: not a PositionIO: not seekable\n");
return B_ERROR;
@@ -267,20 +276,22 @@ oggReader::Seek(void *cookie,
ogg_stream_state * stream = static_cast<ogg_stream_state *>(cookie);
int position;
if (seekTo & B_MEDIA_SEEK_TO_FRAME) {
position = *frame;
position = frameToFilePosition(*frame);
} else if (seekTo & B_MEDIA_SEEK_TO_TIME) {
position = *time;
position = timeToFilePosition(*time);
} else {
return B_ERROR;
}
*frame = filePositionToFrame(position);
*time = filePositionToTime(position);
// TODO: use B_MEDIA_SEEK_CLOSEST_BACKWARD, B_MEDIA_SEEK_CLOSEST_FORWARD to find key frame
int serialno = stream->serialno;
if (ogg_stream_clear(stream) != 0) {
TRACE("oggReader::GetPage: ogg_stream_destroy failed?: error\n");
if (ogg_sync_clear(&fSync) != 0) {
TRACE("oggReader::Seek: ogg_sync_clear failed?: error\n");
return B_ERROR;
}
if (ogg_stream_init(stream,serialno) != 0) {
TRACE("oggReader::GetPage: ogg_stream_init failed?: error\n");
if (ogg_stream_reset(stream) != 0) {
TRACE("oggReader::Seek: ogg_stream_reset failed?: error\n");
return B_ERROR;
}
fSeekable->Seek(position,SEEK_SET);