C++ (Cpp) ff_flac_is_extradata_valid Examples

Example #1

File: flacdec.c Project: ElfSundae/FFmpegAudioTest

static av_cold int flac_decode_init(AVCodecContext *avctx)
{
    enum FLACExtradataFormat format;
    uint8_t *streaminfo;
    FLACContext *s = avctx->priv_data;
    s->avctx = avctx;

    avctx->sample_fmt = AV_SAMPLE_FMT_S16;

    /* for now, the raw FLAC header is allowed to be passed to the decoder as
       frame data instead of extradata. */
    if (!avctx->extradata)
        return 0;

    if (!ff_flac_is_extradata_valid(avctx, &format, &streaminfo))
        return -1;

    /* initialize based on the demuxer-supplied streamdata header */
    ff_flac_parse_streaminfo(avctx, (FLACStreaminfo *)s, streaminfo);
    if (s->bps > 16)
        avctx->sample_fmt = AV_SAMPLE_FMT_S32;
    else
        avctx->sample_fmt = AV_SAMPLE_FMT_S16;
    allocate_buffers(s);
    s->got_streaminfo = 1;

    return 0;
}

Example #2

File: flacdec.c Project: OS2World/LIB-libav

static av_cold int flac_decode_init(AVCodecContext *avctx)
{
    enum FLACExtradataFormat format;
    uint8_t *streaminfo;
    int ret;
    FLACContext *s = avctx->priv_data;
    s->avctx = avctx;

    /* for now, the raw FLAC header is allowed to be passed to the decoder as
       frame data instead of extradata. */
    if (!avctx->extradata)
        return 0;

    if (!ff_flac_is_extradata_valid(avctx, &format, &streaminfo))
        return AVERROR_INVALIDDATA;

    /* initialize based on the demuxer-supplied streamdata header */
    ff_flac_parse_streaminfo(avctx, (FLACStreaminfo *)s, streaminfo);
    ret = allocate_buffers(s);
    if (ret < 0)
        return ret;
    flac_set_bps(s);
    ff_flacdsp_init(&s->dsp, avctx->sample_fmt, s->bps);
    s->got_streaminfo = 1;

    return 0;
}

Example #3

File: flacenc.c Project: AndyA/ffmbc

static int flac_write_trailer(struct AVFormatContext *s)
{
    ByteIOContext *pb = s->pb;
    uint8_t *streaminfo;
    enum FLACExtradataFormat format;
    int64_t file_size;

    if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
        return -1;

    if (!url_is_streamed(pb)) {
        /* rewrite the STREAMINFO header block data */
        file_size = url_ftell(pb);
        url_fseek(pb, 8, SEEK_SET);
        put_buffer(pb, streaminfo, FLAC_STREAMINFO_SIZE);
        url_fseek(pb, file_size, SEEK_SET);
        put_flush_packet(pb);
    } else {
        av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
    }
    return 0;
}

Example #4

File: flacenc.c Project: Tonyton/gstreamer-ducati

static int flac_write_trailer(struct AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    uint8_t *streaminfo;
    enum FLACExtradataFormat format;
    int64_t file_size;

    if (!ff_flac_is_extradata_valid(s->streams[0]->codec, &format, &streaminfo))
        return -1;

    if (pb->seekable) {
        /* rewrite the STREAMINFO header block data */
        file_size = avio_tell(pb);
        avio_seek(pb, 8, SEEK_SET);
        avio_write(pb, streaminfo, FLAC_STREAMINFO_SIZE);
        avio_seek(pb, file_size, SEEK_SET);
        avio_flush(pb);
    } else {
        av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
    }
    return 0;
}

Example #5

File: flacenc_header.c Project: AndyA/ffmbc

int ff_flac_write_header(ByteIOContext *pb, AVCodecContext *codec,
                         int last_block)
{
    uint8_t header[8] = {
        0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
    };
    uint8_t *streaminfo;
    enum FLACExtradataFormat format;

    header[4] = last_block ? 0x80 : 0x00;
    if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
        return -1;

    /* write "fLaC" stream marker and first metadata block header if needed */
    if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
        put_buffer(pb, header, 8);
    }

    /* write STREAMINFO or full header */
    put_buffer(pb, codec->extradata, codec->extradata_size);

    return 0;
}

Example #6

File: oggenc.c Project: BigBadOwl/iPhone-Ffmpeg

static int ogg_build_flac_headers(AVCodecContext *avctx,
                                  OGGStreamContext *oggstream, int bitexact)
{
    enum FLACExtradataFormat format;
    uint8_t *streaminfo;
    uint8_t *p;

    if (!ff_flac_is_extradata_valid(avctx, &format, &streaminfo))
        return -1;

    // first packet: STREAMINFO
    oggstream->header_len[0] = 51;
    oggstream->header[0] = av_mallocz(51); // per ogg flac specs
    p = oggstream->header[0];
    if (!p)
        return AVERROR_NOMEM;
    bytestream_put_byte(&p, 0x7F);
    bytestream_put_buffer(&p, "FLAC", 4);
    bytestream_put_byte(&p, 1); // major version
    bytestream_put_byte(&p, 0); // minor version
    bytestream_put_be16(&p, 1); // headers packets without this one
    bytestream_put_buffer(&p, "fLaC", 4);
    bytestream_put_byte(&p, 0x00); // streaminfo
    bytestream_put_be24(&p, 34);
    bytestream_put_buffer(&p, streaminfo, FLAC_STREAMINFO_SIZE);

    // second packet: VorbisComment
    p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1]);
    if (!p)
        return AVERROR_NOMEM;
    oggstream->header[1] = p;
    bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
    bytestream_put_be24(&p, oggstream->header_len[1] - 4);

    return 0;
}