lavr: temporarily store custom matrix in AVAudioResampleContext

This allows AudioMix to be treated the same way as other conversion contexts
and removes the requirement to allocate it at the same time as the
AVAudioResampleContext.

The current matrix get/set functions are split between the public interface
and AudioMix private functions.

1 files changed, 6 insertions, 0 deletions

diff --git a/libavresample/internal.h b/libavresample/internal.h
index 006b6fd14a..3fd33fed6a 100644
--- a/libavresample/internal.h
+++ b/libavresample/internal.h
@@ -74,6 +74,12 @@ struct AVAudioResampleContext {
     ResampleContext *resample;  /**< resampling context                      */
     AudioMix *am;               /**< channel mixing context                  */
     enum AVMatrixEncoding matrix_encoding;      /**< matrixed stereo encoding */
+
+    /**
+     * mix matrix
+     * only used if avresample_set_matrix() is called before avresample_open()
+     */
+    double *mix_matrix;
 };
 
 #endif /* AVRESAMPLE_INTERNAL_H */