static av_cold int MP3lame_encode_init(AVCodecContext *avctx) { Mp3AudioContext *s = avctx->priv_data; if (avctx->channels > 2) return -1; s->stereo = avctx->channels > 1 ? 1 : 0; if ((s->gfp = lame_init()) == NULL) goto err; lame_set_in_samplerate(s->gfp, avctx->sample_rate); lame_set_out_samplerate(s->gfp, avctx->sample_rate); lame_set_num_channels(s->gfp, avctx->channels); if(avctx->compression_level == FF_COMPRESSION_DEFAULT) { lame_set_quality(s->gfp, 5); } else { lame_set_quality(s->gfp, avctx->compression_level); } lame_set_mode(s->gfp, s->stereo ? JOINT_STEREO : MONO); lame_set_brate(s->gfp, avctx->bit_rate/1000); if(avctx->flags & CODEC_FLAG_QSCALE) { lame_set_brate(s->gfp, 0); lame_set_VBR(s->gfp, vbr_default); lame_set_VBR_quality(s->gfp, avctx->global_quality/(float)FF_QP2LAMBDA); } lame_set_bWriteVbrTag(s->gfp,0); lame_set_disable_reservoir(s->gfp, avctx->flags2 & CODEC_FLAG2_BIT_RESERVOIR ? 0 : 1); if (lame_init_params(s->gfp) < 0) goto err_close; avctx->frame_size = lame_get_framesize(s->gfp); avctx->coded_frame= avcodec_alloc_frame(); avctx->coded_frame->key_frame= 1; return 0; err_close: lame_close(s->gfp); err: return -1; }