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Fix Opus FS#13133 - Files with embedded artwork 45.8KiB+ skip near beginning

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ogg_sync_reset() causes issues on the partial page boundary
due to the next page (already in buffer) being discarded

instead seek next page boundary past complete page

Change-Id: Ic05f188f489b015693d663f131e09cd92ad37ff7
This commit is contained in:
William Wilgus 2018-12-31 03:04:31 -06:00
parent 976831e667
commit 100f4338de
1 changed files with 27 additions and 2 deletions
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27
lib/rbcodec/codecs/opus.c
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@ -57,6 +57,27 @@ static int get_more_data(ogg_sync_state *oy)
return bytes;
}
/* seek to ogg page after given file position */
static int seek_ogg_page(int64_t filepos)
{
const char synccode[] = "OggS\0"; /* Note: there are two nulls here */
char buf[sizeof(synccode)];
ci->seek_buffer(filepos);
while (ci->read_filebuf(buf, 1) == 1) {
if (buf[0] == synccode[0]) {
if (ci->read_filebuf(&buf[1], sizeof(buf) - 1) != sizeof(buf) - 1)
break;
if (memcmp(buf, synccode, sizeof(buf)) == 0) {
ci->seek_buffer(ci->curpos - sizeof(buf));
LOGF("next page %ld", ci->curpos);
return 1;
}
}
}
return 0;
}
/* The read/seek functions track absolute position within the stream */
static int64_t get_next_page(ogg_sync_state *oy, ogg_page *og,
int64_t boundary)
@ -408,8 +429,12 @@ enum codec_status codec_run(void)
/* Do this to avoid allocating space for huge comment packets
(embedded Album Art) */
if(os.packetno == 1 && ogg_stream_packetpeek(&os, &op) != 1){
if (os.packetno == 1 && ogg_stream_packetpeek(&os, NULL) == 0){
LOGF("sync reset");
/* seek buffer directly to the first audio packet */
seek_ogg_page(ci->curpos - oy.returned);
ogg_sync_reset(&oy);
break;
}
while ((ogg_stream_packetout(&os, &op) == 1) && !op.e_o_s) {