Function gsm_parse

libavcodec/gsm_parser.c:40–85

} GSMParseContext;

static int gsm_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
                     const uint8_t **poutbuf, int *poutbuf_size,
                     const uint8_t *buf, int buf_size)
{
    GSMParseContext *s = s1->priv_data;
    ParseContext *pc = &s->pc;
    int next;

    if (!s->block_size) {
        switch (avctx->codec_id) {
        case AV_CODEC_ID_GSM:
            s->block_size = GSM_BLOCK_SIZE;
            s->duration   = GSM_FRAME_SIZE;
            break;
        case AV_CODEC_ID_GSM_MS:
            s->block_size = avctx->block_align ? avctx->block_align
                                               : GSM_MS_BLOCK_SIZE;
            s->duration   = GSM_FRAME_SIZE * 2;
            break;
        default:
            av_assert0(0);
        }
    }

    if (!s->remaining)
        s->remaining = s->block_size;
    if (s->remaining <= buf_size) {
        next = s->remaining;
        s->remaining = 0;
    } else {
        next = END_NOT_FOUND;
        s->remaining -= buf_size;
    }

    if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
        *poutbuf      = NULL;
        *poutbuf_size = 0;
        return buf_size;
    }

    s1->duration = s->duration;

    *poutbuf      = buf;
    *poutbuf_size = buf_size;
    return next;
}

const FFCodecParser ff_gsm_parser = {
    PARSER_CODEC_LIST(AV_CODEC_ID_GSM, AV_CODEC_ID_GSM_MS),