av_cold int swr_init(struct SwrContext *s){ int ret; clear_context(s); if(s-> in_sample_fmt >= AV_SAMPLE_FMT_NB){ av_log(s, AV_LOG_ERROR, "Requested input sample format %d is invalid\n", s->in_sample_fmt); return AVERROR(EINVAL); } if(s->out_sample_fmt >= AV_SAMPLE_FMT_NB){ av_log(s, AV_LOG_ERROR, "Requested output sample format %d is invalid\n", s->out_sample_fmt); return AVERROR(EINVAL); } s->out.ch_count = s-> user_out_ch_count; s-> in.ch_count = s-> user_in_ch_count; s->used_ch_count = s->user_used_ch_count; s-> in_ch_layout = s-> user_in_ch_layout; s->out_ch_layout = s->user_out_ch_layout; if(av_get_channel_layout_nb_channels(s-> in_ch_layout) > SWR_CH_MAX) { av_log(s, AV_LOG_WARNING, "Input channel layout 0x%"PRIx64" is invalid or unsupported.\n", s-> in_ch_layout); s->in_ch_layout = 0; } if(av_get_channel_layout_nb_channels(s->out_ch_layout) > SWR_CH_MAX) { av_log(s, AV_LOG_WARNING, "Output channel layout 0x%"PRIx64" is invalid or unsupported.\n", s->out_ch_layout); s->out_ch_layout = 0; } switch(s->engine){ #if CONFIG_LIBSOXR case SWR_ENGINE_SOXR: s->resampler = &swri_soxr_resampler; break; #endif case SWR_ENGINE_SWR : s->resampler = &swri_resampler; break; default: av_log(s, AV_LOG_ERROR, "Requested resampling engine is unavailable\n"); return AVERROR(EINVAL); } if(!s->used_ch_count) s->used_ch_count= s->in.ch_count; if(s->used_ch_count && s-> in_ch_layout && s->used_ch_count != av_get_channel_layout_nb_channels(s-> in_ch_layout)){ av_log(s, AV_LOG_WARNING, "Input channel layout has a different number of channels than the number of used channels, ignoring layout\n"); s-> in_ch_layout= 0; } if(!s-> in_ch_layout) s-> in_ch_layout= av_get_default_channel_layout(s->used_ch_count); if(!s->out_ch_layout) s->out_ch_layout= av_get_default_channel_layout(s->out.ch_count); s->rematrix= s->out_ch_layout !=s->in_ch_layout || s->rematrix_volume!=1.0 || s->rematrix_custom; if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){ if(av_get_planar_sample_fmt(s->in_sample_fmt) <= AV_SAMPLE_FMT_S16P){ s->int_sample_fmt= AV_SAMPLE_FMT_S16P; }else if( av_get_planar_sample_fmt(s-> in_sample_fmt) == AV_SAMPLE_FMT_S32P && av_get_planar_sample_fmt(s->out_sample_fmt) == AV_SAMPLE_FMT_S32P && !s->rematrix && s->engine != SWR_ENGINE_SOXR){ s->int_sample_fmt= AV_SAMPLE_FMT_S32P; }else if(av_get_planar_sample_fmt(s->in_sample_fmt) <= AV_SAMPLE_FMT_FLTP){ s->int_sample_fmt= AV_SAMPLE_FMT_FLTP; }else{ av_log(s, AV_LOG_DEBUG, "Using double precision mode\n"); s->int_sample_fmt= AV_SAMPLE_FMT_DBLP; } } if( s->int_sample_fmt != AV_SAMPLE_FMT_S16P &&s->int_sample_fmt != AV_SAMPLE_FMT_S32P &&s->int_sample_fmt != AV_SAMPLE_FMT_FLTP &&s->int_sample_fmt != AV_SAMPLE_FMT_DBLP){ av_log(s, AV_LOG_ERROR, "Requested sample format %s is not supported internally, S16/S32/FLT/DBL is supported\n", av_get_sample_fmt_name(s->int_sample_fmt)); return AVERROR(EINVAL); } set_audiodata_fmt(&s-> in, s-> in_sample_fmt); set_audiodata_fmt(&s->out, s->out_sample_fmt); if (s->firstpts_in_samples != AV_NOPTS_VALUE) { if (!s->async && s->min_compensation >= FLT_MAX/2) s->async = 1; s->firstpts = s->outpts = s->firstpts_in_samples * s->out_sample_rate; } else s->firstpts = AV_NOPTS_VALUE; if (s->async) { if (s->min_compensation >= FLT_MAX/2) s->min_compensation = 0.001; if (s->async > 1.0001) { s->max_soft_compensation = s->async / (double) s->in_sample_rate; } } if (s->out_sample_rate!=s->in_sample_rate || (s->flags & SWR_FLAG_RESAMPLE)){ s->resample = s->resampler->init(s->resample, s->out_sample_rate, s->in_sample_rate, s->filter_size, s->phase_shift, s->linear_interp, s->cutoff, s->int_sample_fmt, s->filter_type, s->kaiser_beta, s->precision, s->cheby); }else s->resampler->free(&s->resample); if( s->int_sample_fmt != AV_SAMPLE_FMT_S16P && s->int_sample_fmt != AV_SAMPLE_FMT_S32P && s->int_sample_fmt != AV_SAMPLE_FMT_FLTP && s->int_sample_fmt != AV_SAMPLE_FMT_DBLP && s->resample){ av_log(s, AV_LOG_ERROR, "Resampling only supported with internal s16/s32/flt/dbl\n"); return -1; } #define RSC 1 //FIXME finetune if(!s-> in.ch_count) s-> in.ch_count= av_get_channel_layout_nb_channels(s-> in_ch_layout); if(!s->used_ch_count) s->used_ch_count= s->in.ch_count; if(!s->out.ch_count) s->out.ch_count= av_get_channel_layout_nb_channels(s->out_ch_layout); if(!s-> in.ch_count){ av_assert0(!s->in_ch_layout); av_log(s, AV_LOG_ERROR, "Input channel count and layout are unset\n"); return -1; } if ((!s->out_ch_layout || !s->in_ch_layout) && s->used_ch_count != s->out.ch_count && !s->rematrix_custom) { char l1[1024], l2[1024]; av_get_channel_layout_string(l1, sizeof(l1), s-> in.ch_count, s-> in_ch_layout); av_get_channel_layout_string(l2, sizeof(l2), s->out.ch_count, s->out_ch_layout); av_log(s, AV_LOG_ERROR, "Rematrix is needed between %s and %s " "but there is not enough information to do it\n", l1, l2); return -1; } av_assert0(s->used_ch_count); av_assert0(s->out.ch_count); s->resample_first= RSC*s->out.ch_count/s->in.ch_count - RSC < s->out_sample_rate/(float)s-> in_sample_rate - 1.0; s->in_buffer= s->in; s->silence = s->in; s->drop_temp= s->out; if(!s->resample && !s->rematrix && !s->channel_map && !s->dither.method){ s->full_convert = swri_audio_convert_alloc(s->out_sample_fmt, s-> in_sample_fmt, s-> in.ch_count, NULL, 0); return 0; } s->in_convert = swri_audio_convert_alloc(s->int_sample_fmt, s-> in_sample_fmt, s->used_ch_count, s->channel_map, 0); s->out_convert= swri_audio_convert_alloc(s->out_sample_fmt, s->int_sample_fmt, s->out.ch_count, NULL, 0); if (!s->in_convert || !s->out_convert) return AVERROR(ENOMEM); s->postin= s->in; s->preout= s->out; s->midbuf= s->in; if(s->channel_map){ s->postin.ch_count= s->midbuf.ch_count= s->used_ch_count; if(s->resample) s->in_buffer.ch_count= s->used_ch_count; } if(!s->resample_first){ s->midbuf.ch_count= s->out.ch_count; if(s->resample) s->in_buffer.ch_count = s->out.ch_count; } set_audiodata_fmt(&s->postin, s->int_sample_fmt); set_audiodata_fmt(&s->midbuf, s->int_sample_fmt); set_audiodata_fmt(&s->preout, s->int_sample_fmt); if(s->resample){ set_audiodata_fmt(&s->in_buffer, s->int_sample_fmt); } if ((ret = swri_dither_init(s, s->out_sample_fmt, s->int_sample_fmt)) < 0) return ret; if(s->rematrix || s->dither.method) return swri_rematrix_init(s); return 0; }