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Codecs: mp4: Re-Fix loading tracks with metadata at the end of file

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first_frame_offset is not set for mp4 files so seeking to it doesn't make any sense. It can lead only to additional re-buffer request. So instead let's just allow seek back for m4a_check_sample_offset check. And do seek_buffer(0) before reading metadata (fixes possible hang introduced in fc65bdab)

Change-Id: Ia7fae14b0137d73b5e263390be5f143deb7ca789
This commit is contained in:
Roman Artiukhin 2024-01-12 18:30:30 +02:00
parent de16065265
commit 3080892d21
1 changed files with 6 additions and 4 deletions
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10
lib/rbcodec/codecs/aac.c
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@ -92,6 +92,8 @@ enum codec_status codec_run(void)
stream_create(&input_stream,ci);
ci->seek_buffer(0);
/* if qtmovie_read returns successfully, the stream is up to
* the movie data, which can be used directly by the decoder */
if (!qtmovie_read(&input_stream, &demux_res)) {
@ -146,7 +148,6 @@ enum codec_status codec_run(void)
} else {
elapsed_time = 0;
sound_samples_done = 0;
ci->seek_buffer(ci->id3->first_frame_offset);
}
ci->set_elapsed(elapsed_time);
@ -194,13 +195,14 @@ enum codec_status codec_run(void)
* doesn't seem to happen much, but it probably means that a
* "proper" file can have chunks out of order. Why one would want
* that an good question (but files with gaps do exist, so who
* knows?), so we don't support that - for now, at least.
* knows?), and we might not properly support it.
* Metadata can also be placed after audio data so skip back if needed.
*/
file_offset = m4a_check_sample_offset(&demux_res, i, &seek_idx);
if (file_offset > ci->curpos)
if (file_offset > 0 && file_offset != ci->curpos)
{
ci->advance_buffer(file_offset - ci->curpos);
ci->seek_buffer(file_offset);
}
/* Request the required number of bytes from the input buffer */