- switch (am->coeff_type) {
- case AV_MIX_COEFF_TYPE_Q8:
- CONVERT_MATRIX(q8, av_clip_int16(lrint(256.0 * v)))
- break;
- case AV_MIX_COEFF_TYPE_Q15:
- CONVERT_MATRIX(q15, av_clipl_int32(llrint(32768.0 * v)))
- break;
- case AV_MIX_COEFF_TYPE_FLT:
- CONVERT_MATRIX(flt, v)
- break;
- default:
- av_log(am->avr, AV_LOG_ERROR, "Invalid mix coeff type\n");
- return AVERROR(EINVAL);
+ if (am->in_matrix_channels && am->out_matrix_channels) {
+ switch (am->coeff_type) {
+ case AV_MIX_COEFF_TYPE_Q8:
+ CONVERT_MATRIX(q8, av_clip_int16(lrint(256.0 * v)))
+ break;
+ case AV_MIX_COEFF_TYPE_Q15:
+ CONVERT_MATRIX(q15, av_clipl_int32(llrint(32768.0 * v)))
+ break;
+ case AV_MIX_COEFF_TYPE_FLT:
+ CONVERT_MATRIX(flt, v)
+ break;
+ default:
+ av_log(am->avr, AV_LOG_ERROR, "Invalid mix coeff type\n");
+ return AVERROR(EINVAL);
+ }