Function parse_frame_header

libavcodec/dca_core.c:85–151

5.3.1 - Bit stream header

// 5.3.1 - Bit stream header
static int parse_frame_header(DCACoreDecoder *s)
{
    DCACoreFrameHeader h = { 0 };
    int err = ff_dca_parse_core_frame_header(&h, &s->gb);

    if (err < 0) {
        switch (err) {
        case DCA_PARSE_ERROR_DEFICIT_SAMPLES:
            av_log(s->avctx, AV_LOG_ERROR, "Deficit samples are not supported\n");
            return h.normal_frame ? AVERROR_INVALIDDATA : AVERROR_PATCHWELCOME;

        case DCA_PARSE_ERROR_PCM_BLOCKS:
            av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of PCM sample blocks (%d)\n", h.npcmblocks);
            return (h.npcmblocks < 6 || h.normal_frame) ? AVERROR_INVALIDDATA : AVERROR_PATCHWELCOME;

        case DCA_PARSE_ERROR_FRAME_SIZE:
            av_log(s->avctx, AV_LOG_ERROR, "Invalid core frame size (%d bytes)\n", h.frame_size);
            return AVERROR_INVALIDDATA;

        case DCA_PARSE_ERROR_AMODE:
            av_log(s->avctx, AV_LOG_ERROR, "Unsupported audio channel arrangement (%d)\n", h.audio_mode);
            return AVERROR_PATCHWELCOME;

        case DCA_PARSE_ERROR_SAMPLE_RATE:
            av_log(s->avctx, AV_LOG_ERROR, "Invalid core audio sampling frequency\n");
            return AVERROR_INVALIDDATA;

        case DCA_PARSE_ERROR_RESERVED_BIT:
            av_log(s->avctx, AV_LOG_ERROR, "Reserved bit set\n");
            return AVERROR_INVALIDDATA;

        case DCA_PARSE_ERROR_LFE_FLAG:
            av_log(s->avctx, AV_LOG_ERROR, "Invalid low frequency effects flag\n");
            return AVERROR_INVALIDDATA;

        case DCA_PARSE_ERROR_PCM_RES:
            av_log(s->avctx, AV_LOG_ERROR, "Invalid source PCM resolution\n");
            return AVERROR_INVALIDDATA;

        default:
            av_log(s->avctx, AV_LOG_ERROR, "Unknown core frame header error\n");
            return AVERROR_INVALIDDATA;
        }
    }

    s->crc_present          = h.crc_present;
    s->npcmblocks           = h.npcmblocks;
    s->frame_size           = h.frame_size;
    s->audio_mode           = h.audio_mode;
    s->sample_rate          = ff_dca_sample_rates[h.sr_code];
    s->bit_rate             = ff_dca_bit_rates[h.br_code];
    s->drc_present          = h.drc_present;
    s->ts_present           = h.ts_present;
    s->aux_present          = h.aux_present;
    s->ext_audio_type       = h.ext_audio_type;
    s->ext_audio_present    = h.ext_audio_present;
    s->sync_ssf             = h.sync_ssf;
    s->lfe_present          = h.lfe_present;