Function amr_parse

libavcodec/amr_parser.c:55–124

}

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

    *poutbuf_size = 0;
    *poutbuf = NULL;

    if (!avctx->ch_layout.nb_channels) {
        av_channel_layout_uninit(&avctx->ch_layout);
        avctx->ch_layout      = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
    }

    if (s1->flags & PARSER_FLAG_COMPLETE_FRAMES) {
        next = buf_size;
    } else {
        int ch, offset = 0;

        for (ch = s->current_channel; ch < avctx->ch_layout.nb_channels; ch++) {
            if (s->remaining >= 0) {
                next = s->remaining;
            } else {
                int mode = (buf[offset] >> 3) & 0x0F;

                if (avctx->codec_id == AV_CODEC_ID_AMR_NB) {
                    next = amrnb_packed_size[mode];
                } else if (avctx->codec_id == AV_CODEC_ID_AMR_WB) {
                    next = amrwb_packed_size[mode];
                }
            }

            offset += next;
            if (offset >= buf_size) {
                s->remaining = offset - buf_size;
                next = END_NOT_FOUND;
                break;
            } else {
                s->remaining = -1;
            }
        }

        s->current_channel = ch % avctx->ch_layout.nb_channels;
        if (s->remaining < 0)
            next = offset;

        if (next != END_NOT_FOUND) {
            if (s->cumulated_size < UINT64_MAX - next) {
                s->cumulated_size += next;
                /* Both AMR formats have 50 frames per second */
                avctx->bit_rate = s->cumulated_size / ++s->block_count * 8 * 50;
            }
        }

        if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {