Exemple #1
0
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;
}
Exemple #2
0
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;
}