--- libavresample/avresample.h | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/libavresample/avresample.h b/libavresample/avresample.h index affeeeb..a73d686 100644 --- a/libavresample/avresample.h +++ b/libavresample/avresample.h @@ -216,6 +216,9 @@ int avresample_build_matrix(uint64_t in_layout, uint64_t out_layout, /** * Get the current channel mixing matrix. * + * If no custom matrix has been previously set or the AVAudioResampleContext is + * not open, an error is returned. + * * @param avr audio resample context * @param matrix mixing coefficients; matrix[i + stride * o] is the weight of * input channel i in output channel o. @@ -231,7 +234,8 @@ int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix, * Allows for setting a custom mixing matrix, overriding the default matrix * generated internally during avresample_open(). This function can be called * anytime on an allocated context, either before or after calling - * avresample_open(). avresample_convert() always uses the current matrix. + * avresample_open(), as long as the channel layouts have been set. + * avresample_convert() always uses the current matrix. * Calling avresample_close() on the context will clear the current matrix. * * @see avresample_close() -- 1.7.1 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
