On Fri, Jul 20, 2018 at 09:51:49AM +0200, Tobias Rapp wrote:
> On 19.07.2018 23:37, Michael Niedermayer wrote:
> >On Thu, Jul 19, 2018 at 01:53:09PM +0200, Tobias Rapp wrote:
> >>On 18.07.2018 19:31, Marcin Gorzel wrote:
> >>>Rematrixing supports up to 64 channels. However, there is only a limited
> >>>number of channel layouts defined. Since the in/out channel count is
> >>>obtained from the channel layout, for undefined layouts (e.g. for 9, 10,
> >>>11 channels etc.) the rematrixing fails.
> >>>
> >>>In ticket #6790 the problem has been partially addressed by applying a
> >>>patch to swr_set_matrix() in rematrix.c:72.
> >>>However, a similar change must be also applied to swri_rematrix_init() in
> >>>rematrix.c:389 and swri_rematrix_init_x86() in rematrix_init.c:36.
> >>>---
> >>> libswresample/rematrix.c | 6 ++++--
> >>> libswresample/x86/rematrix_init.c | 6 ++++--
> >>> 2 files changed, 8 insertions(+), 4 deletions(-)
> >>>
> >>>diff --git a/libswresample/rematrix.c b/libswresample/rematrix.c
> >>>index 8227730056..d1a0cfe7f8 100644
> >>>--- a/libswresample/rematrix.c
> >>>+++ b/libswresample/rematrix.c
> >>>@@ -384,8 +384,10 @@ av_cold static int auto_matrix(SwrContext *s)
> >>> av_cold int swri_rematrix_init(SwrContext *s){
> >>> int i, j;
> >>>- int nb_in = av_get_channel_layout_nb_channels(s->in_ch_layout);
> >>>- int nb_out = av_get_channel_layout_nb_channels(s->out_ch_layout);
> >>>+ int nb_in = (s->in.ch_count > 0) ? s->in.ch_count :
> >>>+ av_get_channel_layout_nb_channels(s->in_ch_layout);
> >>>+ int nb_out = (s->out.ch_count > 0) ? s->out.ch_count :
> >>>+ av_get_channel_layout_nb_channels(s->out_ch_layout);
> >>> s->mix_any_f = NULL;
> >>>diff --git a/libswresample/x86/rematrix_init.c
> >>>b/libswresample/x86/rematrix_init.c
> >>>index d71b41a73e..4f9c92e4ab 100644
> >>>--- a/libswresample/x86/rematrix_init.c
> >>>+++ b/libswresample/x86/rematrix_init.c
> >>>@@ -33,8 +33,10 @@ D(int16, sse2)
> >>> av_cold int swri_rematrix_init_x86(struct SwrContext *s){
> >>> #if HAVE_X86ASM
> >>> int mm_flags = av_get_cpu_flags();
> >>>- int nb_in = av_get_channel_layout_nb_channels(s->in_ch_layout);
> >>>- int nb_out = av_get_channel_layout_nb_channels(s->out_ch_layout);
> >>>+ int nb_in = (s->in.ch_count > 0) ? s->in.ch_count :
> >>>+ av_get_channel_layout_nb_channels(s->in_ch_layout);
> >>>+ int nb_out = (s->out.ch_count > 0) ? s->out.ch_count :
> >>>+ av_get_channel_layout_nb_channels(s->out_ch_layout);
> >>> int num = nb_in * nb_out;
> >>> int i,j;
> >>>
> >>
> >>Patch looks good to me, except that the title should be updated to reflect
> >>the new logic. I suggest something like "swresample: Use channel count for
> >>rematrix initialization if defined".
> >
> >The patch does not look good to me
> >There should be a field that represents the count of channels.
> >No conditional should be needed
> >
> >please check that every field is wrong in at least some case.
> >If true a new field must be added or a existing one needs to be set
> >differently
> >But there should be a field that represents the channel count.
>
> If I understand correctly you say that the fall-back to
> av_get_channel_layout_nb_channels() is not needed here as both functions are
> internal and called only as part of swr_init() so we may safely assume that
> the in/out.ch_count fields have been initialized before this code is
> reached.yes, if that is tested and works. If it does not work, it would be very interresting why not > > Fine with me. Marcin, would you update the patch once more? And there are > some additional FATE tests for the pan filter that I can post once this > patch is through, if you haven't made up your own tests. > > Regards, > Tobias > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB "I am not trying to be anyone's saviour, I'm trying to think about the future and not be sad" - Elon Musk
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