46     avr->in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);  in avresample_open()
47     if (avr->in_channels <= 0 || avr->in_channels > AVRESAMPLE_MAX_CHANNELS) {  in avresample_open()
58     avr->resample_channels = FFMIN(avr->in_channels, avr->out_channels);  in avresample_open()
59     avr->downmix_needed    = avr->in_channels  > avr->out_channels;  in avresample_open()
60     avr->upmix_needed      = avr->out_channels > avr->in_channels ||  in avresample_open()
147                 for (ch = 0; ch < avr->in_channels; ch++)  in avresample_open()
154                 for (ch = 0; ch < avr->in_channels; ch++)  in avresample_open()
161                 for (ch = 0; ch < avr->in_channels; ch++)  in avresample_open()
167             for (ch = 0; ch < avr->in_channels; ch++)  in avresample_open()
177         avr->in_buffer = ff_audio_data_alloc(FFMAX(avr->in_channels, avr->out_channels),  in avresample_open()
212                                             avr->in_sample_fmt, avr->in_channels,  in avresample_open()
374                                  avr->in_channels, in_samples,  in avresample_convert()
423             ff_audio_data_set_channels(avr->in_buffer, avr->in_channels);  in avresample_convert()
640     int in_channels, out_channels, i, o;  in avresample_get_matrix()  local
645     in_channels  = av_get_channel_layout_nb_channels(avr->in_channel_layout);  in avresample_get_matrix()
648     if ( in_channels <= 0 ||  in_channels > AVRESAMPLE_MAX_CHANNELS ||  in avresample_get_matrix()
660         for (i = 0; i < in_channels; i++)  in avresample_get_matrix()
661             matrix[o * stride + i] = avr->mix_matrix[o * in_channels + i];  in avresample_get_matrix()
669     int in_channels, out_channels, i, o;  in avresample_set_matrix()  local
674     in_channels  = av_get_channel_layout_nb_channels(avr->in_channel_layout);  in avresample_set_matrix()
677     if ( in_channels <= 0 ||  in_channels > AVRESAMPLE_MAX_CHANNELS ||  in avresample_set_matrix()
685     avr->mix_matrix = av_malloc(in_channels * out_channels *  in avresample_set_matrix()
691         for (i = 0; i < in_channels; i++)  in avresample_set_matrix()
692             avr->mix_matrix[o * in_channels + i] = matrix[o * stride + i];  in avresample_set_matrix()
701     int in_channels, ch, i;  in avresample_set_channel_mapping()  local
703     in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);  in avresample_set_channel_mapping()
704     if (in_channels <= 0 ||  in_channels > AVRESAMPLE_MAX_CHANNELS) {  in avresample_set_channel_mapping()
712     for (ch = 0; ch < in_channels; ch++) {  in avresample_set_channel_mapping()
713         if (channel_map[ch] >= in_channels) {  in avresample_set_channel_mapping()
734     for (ch = 0, i = 0; ch < in_channels && i < in_channels; ch++, i++) {  in avresample_set_channel_mapping()
735         while (ch < in_channels && info->input_map[ch] >= 0)  in avresample_set_channel_mapping()
737         while (i < in_channels && info->channel_map[i] >= 0)  in avresample_set_channel_mapping()
739         if (ch >= in_channels || i >= in_channels)  in avresample_set_channel_mapping()