void simple_ogg_page__clear(ogg_page *page)
{
if(page->header)
free(page->header);
if(page->body)
free(page->body);
simple_ogg_page__init(page);
}
void metadata_callback_(const FLAC__StreamEncoder *unused, const FLAC__StreamMetadata *metadata, void *client_data)
{
OggFLAC__SeekableStreamEncoder *encoder = (OggFLAC__SeekableStreamEncoder*)client_data;
FLAC__byte b[max(6, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
const unsigned min_framesize = metadata->data.stream_info.min_framesize;
const unsigned max_framesize = metadata->data.stream_info.max_framesize;
ogg_page page;
FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
/* We get called by the stream encoder when the encoding process
* has finished so that we can update the STREAMINFO and SEEKTABLE
* blocks.
*/
(void)unused; /* silence compiler warning about unused parameter */
FLAC__ASSERT(encoder->private_->FLAC_stream_encoder == unused);
/*@@@ reopen callback here? The docs currently require user to open files in update mode from the start */
/* All this is based on intimate knowledge of the stream header
* layout, but a change to the header format that would break this
* would also break all streams encoded in the previous format.
*/
/*
* Write STREAMINFO stats
*/
simple_ogg_page__init(&page);
if(!simple_ogg_page__get_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
/*
* MD5 signature
*/
{
const unsigned md5_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
) / 8;
if(md5_offset + 16 > (unsigned)page.body_len) {
encoder->protected_->state = OggFLAC__SEEKABLE_STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
memcpy(page.body + md5_offset, metadata->data.stream_info.md5sum, 16);
}
/*
* total samples
*/
{
const unsigned total_samples_byte_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
- 4
) / 8;
if(total_samples_byte_offset + 5 > (unsigned)page.body_len) {
encoder->protected_->state = OggFLAC__SEEKABLE_STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
b[0] = (FLAC__byte)page.body[total_samples_byte_offset] & 0xF0;
b[0] |= (FLAC__byte)((samples >> 32) & 0x0F);
b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
b[4] = (FLAC__byte)(samples & 0xFF);
memcpy(page.body + total_samples_byte_offset, b, 5);
}
/*
* min/max framesize
*/
{
const unsigned min_framesize_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
) / 8;
if(min_framesize_offset + 6 > (unsigned)page.body_len) {
encoder->protected_->state = OggFLAC__SEEKABLE_STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
b[2] = (FLAC__byte)(min_framesize & 0xFF);
b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
b[5] = (FLAC__byte)(max_framesize & 0xFF);
memcpy(page.body + min_framesize_offset, b, 6);
}
if(!simple_ogg_page__set_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
simple_ogg_page__clear(&page);
/*
* Write seektable
*/
if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
unsigned i;
FLAC__byte *p;
FLAC__format_seektable_sort(encoder->private_->seek_table);
FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
simple_ogg_page__init(&page);
if(!simple_ogg_page__get_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
if(FLAC__STREAM_METADATA_HEADER_LENGTH + (18*encoder->private_->seek_table->num_points) > (unsigned)page.body_len) {
encoder->protected_->state = OggFLAC__SEEKABLE_STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
for(i = 0, p = page.body + FLAC__STREAM_METADATA_HEADER_LENGTH; i < encoder->private_->seek_table->num_points; i++, p += 18) {
FLAC__uint64 xx;
unsigned x;
xx = encoder->private_->seek_table->points[i].sample_number;
b[7] = (FLAC__byte)xx; xx >>= 8;
b[6] = (FLAC__byte)xx; xx >>= 8;
b[5] = (FLAC__byte)xx; xx >>= 8;
b[4] = (FLAC__byte)xx; xx >>= 8;
b[3] = (FLAC__byte)xx; xx >>= 8;
b[2] = (FLAC__byte)xx; xx >>= 8;
b[1] = (FLAC__byte)xx; xx >>= 8;
b[0] = (FLAC__byte)xx; xx >>= 8;
xx = encoder->private_->seek_table->points[i].stream_offset;
b[15] = (FLAC__byte)xx; xx >>= 8;
b[14] = (FLAC__byte)xx; xx >>= 8;
b[13] = (FLAC__byte)xx; xx >>= 8;
b[12] = (FLAC__byte)xx; xx >>= 8;
b[11] = (FLAC__byte)xx; xx >>= 8;
b[10] = (FLAC__byte)xx; xx >>= 8;
b[9] = (FLAC__byte)xx; xx >>= 8;
b[8] = (FLAC__byte)xx; xx >>= 8;
x = encoder->private_->seek_table->points[i].frame_samples;
b[17] = (FLAC__byte)x; x >>= 8;
b[16] = (FLAC__byte)x; x >>= 8;
if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->protected_->state = OggFLAC__SEEKABLE_STREAM_ENCODER_WRITE_ERROR;
simple_ogg_page__clear(&page);
return;
}
memcpy(p, b, 18);
}
if(!simple_ogg_page__set_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
simple_ogg_page__clear(&page);
}
