Function decavcodecaInit

libhb/decavcodec.c:367–548

* hb_work_decavcodec_init *********************************************************************** * **********************************************************************/

 *
 **********************************************************************/
static int decavcodecaInit( hb_work_object_t * w, hb_job_t * job )
{
    const AVCodec *codec;

    hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
    w->private_data = pv;

    pv->job          = job;
    pv->audio        = w->audio;
    pv->drop_samples = w->audio->config.in.encoder_delay;
    pv->next_pts     = (int64_t)AV_NOPTS_VALUE;
    if (job)
        pv->title    = job->title;
    else
        pv->title    = w->title;
    hb_buffer_list_clear(&pv->list);

    codec       = avcodec_find_decoder(w->codec_param);
    pv->context = avcodec_alloc_context3(codec);

    if (pv->title->opaque_priv != NULL)
    {
        AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv;
        avcodec_parameters_to_context(pv->context,
                                      ic->streams[w->audio->id]->codecpar);
        // libav's eac3 parser toggles the codec_id in the context as
        // it reads eac3 data between AV_CODEC_ID_AC3 and AV_CODEC_ID_EAC3.
        // It detects an AC3 sync pattern sometimes in ac3_sync() which
        // causes it to eventually set avctx->codec_id to AV_CODEC_ID_AC3
        // in ff_aac_ac3_parse(). Since we are parsing some data before
        // we get here, the codec_id may have flipped.  This will cause an
        // error in hb_avcodec_open().  So flip it back!
        pv->context->codec_id = w->codec_param;
    }
    else
    {
        pv->parser = av_parser_init(w->codec_param);
    }
    hb_ff_set_sample_fmt(pv->context, codec, AV_SAMPLE_FMT_FLT);

    // Set decoder opts...
    AVDictionary *av_opts = NULL;

    /* Downmixing & sample_fmt conversion */
    if (!(w->audio->config.out.codec & HB_ACODEC_PASS_FLAG))
    {
        // Currently, samplerate conversion is performed in sync.c
        // So set output samplerate to input samplerate
        // This should someday get reworked to be part of an audio
        // filter pipeline.
        pv->resample =
            hb_audio_resample_init(AV_SAMPLE_FMT_FLT,
                                   w->audio->config.in.samplerate,
                                   w->audio->config.out.mixdown,
                                   w->audio->config.out.normalize_mix_level);
        if (pv->resample == NULL)
        {
            hb_error("decavcodecaInit: hb_audio_resample_init() failed");