Function decoded_frames_get_free

libavcodec/pthread_frame.c:192–211

get a free frame to decode into

// get a free frame to decode into
static AVFrame *decoded_frames_get_free(DecodedFrames *df)
{
    if (df->nb_f == df->nb_f_allocated) {
        AVFrame **tmp = av_realloc_array(df->f, df->nb_f + 1,
                                         sizeof(*df->f));
        if (!tmp)
            return NULL;
        df->f = tmp;

        df->f[df->nb_f] = av_frame_alloc();
        if (!df->f[df->nb_f])
            return NULL;

        df->nb_f_allocated++;
    }

    av_assert0(!df->f[df->nb_f]->buf[0]);

    return df->f[df->nb_f];
}

static void decoded_frames_pop(DecodedFrames *df, AVFrame *dst)
{