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author | William Wilgus <me.theuser@yahoo.com> | 2018-12-31 03:04:31 -0600 |
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committer | William Wilgus <me.theuser@yahoo.com> | 2019-01-04 06:56:52 +0100 |
commit | 100f4338deea5239423a0b8974784939d520385c (patch) | |
tree | 95d63e56710b031fca6a8f26500cc2cacd964378 /lib | |
parent | 976831e6674db98cc7992db1479afff9d2877c81 (diff) | |
download | rockbox-100f4338deea5239423a0b8974784939d520385c.tar.gz rockbox-100f4338deea5239423a0b8974784939d520385c.zip |
Fix Opus FS#13133 - Files with embedded artwork 45.8KiB+ skip near beginning
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
Diffstat (limited to 'lib')
-rw-r--r-- | lib/rbcodec/codecs/opus.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/lib/rbcodec/codecs/opus.c b/lib/rbcodec/codecs/opus.c index 1ce7f19dfd..6574d6c052 100644 --- a/lib/rbcodec/codecs/opus.c +++ b/lib/rbcodec/codecs/opus.c @@ -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){ - ogg_sync_reset(&oy); + 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) { |