fprintf(stderr, "ac3dec: AC3 Source channels are less than specified: output to %d channels.. (frmsize: %d)\n", s->channels, len);
av_log( avctx, AV_LOG_INFO, "ac3dec: AC3 Source channels are less than specified: output to %d channels.. (frmsize: %d)\n", s->channels, len);
static int ac3_decode_frame(AVCodecContext *avctx,                             void *data, int *data_size,                            uint8_t *buf, int buf_size){    AC3DecodeState *s = avctx->priv_data;    uint8_t *buf_ptr;    int flags, i, len;    int sample_rate, bit_rate;    short *out_samples = data;    float level;    static const int ac3_channels[8] = {	2, 1, 2, 3, 3, 4, 4, 5    };    buf_ptr = buf;    while (buf_size > 0) {        len = s->inbuf_ptr - s->inbuf;        if (s->frame_size == 0) {            /* no header seen : find one. We need at least 7 bytes to parse it */            len = HEADER_SIZE - len;            if (len > buf_size)                len = buf_size;            memcpy(s->inbuf_ptr, buf_ptr, len);            buf_ptr += len;            s->inbuf_ptr += len;            buf_size -= len;            if ((s->inbuf_ptr - s->inbuf) == HEADER_SIZE) {                len = ac3_syncinfo (s->inbuf, &s->flags, &sample_rate, &bit_rate);                if (len == 0) {                    /* no sync found : move by one byte (inefficient, but simple!) */                    memcpy(s->inbuf, s->inbuf + 1, HEADER_SIZE - 1);                    s->inbuf_ptr--;                } else {		    s->frame_size = len;                    /* update codec info */                    avctx->sample_rate = sample_rate;                    s->channels = ac3_channels[s->flags & 7];                    if (s->flags & AC3_LFE)			s->channels++;		    if (avctx->channels == 0)			/* No specific number of channel requested */			avctx->channels = s->channels;		    else if (s->channels < avctx->channels) {			fprintf(stderr, "ac3dec: AC3 Source channels are less than specified: output to %d channels.. (frmsize: %d)\n", s->channels, len);			avctx->channels = s->channels;		    }		    avctx->bit_rate = bit_rate;                }            }        } else if (len < s->frame_size) {            len = s->frame_size - len;            if (len > buf_size)                len = buf_size;            memcpy(s->inbuf_ptr, buf_ptr, len);            buf_ptr += len;            s->inbuf_ptr += len;            buf_size -= len;        } else {            flags = s->flags;            if (avctx->channels == 1)                flags = AC3_MONO;            else if (avctx->channels == 2)                flags = AC3_STEREO;            else                flags |= AC3_ADJUST_LEVEL;            level = 1;            if (ac3_frame (&s->state, s->inbuf, &flags, &level, 384)) {            fail:                s->inbuf_ptr = s->inbuf;                s->frame_size = 0;                continue;            }            for (i = 0; i < 6; i++) {                if (ac3_block (&s->state))                    goto fail;                float_to_int (*samples, out_samples + i * 256 * avctx->channels, avctx->channels);            }            s->inbuf_ptr = s->inbuf;            s->frame_size = 0;            *data_size = 6 * avctx->channels * 256 * sizeof(int16_t);            break;        }    }    return buf_ptr - buf;}