static av_cold int g726_decode_init(AVCodecContext *avctx) { G726Context* c = avctx->priv_data; if (avctx->sample_rate <= 0) { av_log(avctx, AV_LOG_ERROR, "Samplerate is invalid\n"); return -1; } if(avctx->channels != 1){ av_log(avctx, AV_LOG_ERROR, "Only mono is supported\n"); return -1; } c->code_size = avctx->bits_per_coded_sample; if (c->code_size < 2 || c->code_size > 5) { av_log(avctx, AV_LOG_ERROR, "Invalid number of bits %d\n", c->code_size); return AVERROR(EINVAL); } g726_reset(c, c->code_size - 2); avctx->sample_fmt = AV_SAMPLE_FMT_S16; return 0; }