static int ogg_write_page(AVFormatContext *s, const uint8_t *data, int size,
int64_t granule, int stream_index, int flags)
{
OGGStreamContext *oggstream = s->streams[stream_index]->priv_data;
int64_t crc_offset;
int page_segments, i;
if (size >= 255*255) {
granule = -1;
size = 255*255;
} else if (oggstream->eos)
flags |= 4;
page_segments = FFMIN((size/255)+!!size, 255);
init_checksum(s->pb, ff_crc04C11DB7_update, 0);
put_tag(s->pb, "OggS");
put_byte(s->pb, 0);
put_byte(s->pb, flags);
put_le64(s->pb, granule);
put_le32(s->pb, stream_index);
put_le32(s->pb, oggstream->page_counter++);
crc_offset = url_ftell(s->pb);
put_le32(s->pb, 0); // crc
put_byte(s->pb, page_segments);
for (i = 0; i < page_segments-1; i++)
put_byte(s->pb, 255);
if (size) {
put_byte(s->pb, size - (page_segments-1)*255);
put_buffer(s->pb, data, size);
}
ogg_update_checksum(s, crc_offset);
put_flush_packet(s->pb);
return size;
}
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
{
OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
ByteIOContext *pb;
int64_t crc_offset;
int ret, size;
uint8_t *buf;
ret = url_open_dyn_buf(&pb);
if (ret < 0)
return ret;
init_checksum(pb, ff_crc04C11DB7_update, 0);
put_tag(pb, "OggS");
put_byte(pb, 0);
put_byte(pb, page->flags | extra_flags);
put_le64(pb, page->granule);
put_le32(pb, oggstream->serial_num);
put_le32(pb, oggstream->page_counter++);
crc_offset = url_ftell(pb);
put_le32(pb, 0); // crc
put_byte(pb, page->segments_count);
put_buffer(pb, page->segments, page->segments_count);
put_buffer(pb, page->data, page->size);
ogg_update_checksum(s, pb, crc_offset);
put_flush_packet(pb);
size = url_close_dyn_buf(pb, &buf);
if (size < 0)
return size;
put_buffer(s->pb, buf, size);
put_flush_packet(s->pb);
av_free(buf);
oggstream->page_count--;
return 0;
}
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
{
OGGStreamContext *oggstream = (OGGStreamContext *)s->streams[page->stream_index]->priv_data;
AVIOContext *pb;
int64_t crc_offset;
int ret, size;
uint8_t *buf;
ret = avio_open_dyn_buf(&pb);
if (ret < 0)
return ret;
ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
ffio_wfourcc(pb, (const uint8_t *)"OggS");
avio_w8(pb, 0);
avio_w8(pb, page->flags | extra_flags);
avio_wl64(pb, page->granule);
avio_wl32(pb, oggstream->serial_num);
avio_wl32(pb, oggstream->page_counter++);
crc_offset = avio_tell(pb);
avio_wl32(pb, 0); // crc
avio_w8(pb, page->segments_count);
avio_write(pb, page->segments, page->segments_count);
avio_write(pb, page->data, page->size);
ogg_update_checksum(s, pb, crc_offset);
avio_flush(pb);
size = avio_close_dyn_buf(pb, &buf);
if (size < 0)
return size;
avio_write(s->pb, buf, size);
avio_flush(s->pb);
av_free(buf);
oggstream->page_count--;
return 0;
}