Hi Andrzej,
On Thu, May 22, 2014 at 03:54:34PM +0200, Andrzej Kaczmarek wrote:
> Hi Andrei,
>
> On 22 May 2014 15:07, Andrei Emeltchenko
> <Andrei.Emeltchenko.news@xxxxxxxxx> wrote:
> > From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
> >
> > downmix_buf is allocated to have buffer size FIXED_BUFFER_SIZE / 2, when
> > we access it as (int16_t *) we shall device index by 2.
> > ---
> > android/hal-audio.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/android/hal-audio.c b/android/hal-audio.c
> > index 7305bb6..96fa5c3 100644
> > --- a/android/hal-audio.c
> > +++ b/android/hal-audio.c
> > @@ -984,7 +984,7 @@ static void downmix_to_mono(struct a2dp_stream_out *out, const uint8_t *buffer,
> > int16_t *output = (void *) out->downmix_buf;
> > size_t i;
> >
> > - for (i = 0; i < bytes / 2; i++) {
> > + for (i = 0; i < bytes / (2 * sizeof(int16_t)); i++) {
> > int16_t l = le16_to_cpu(get_unaligned(&input[i * 2]));
> > int16_t r = le16_to_cpu(get_unaligned(&input[i * 2 + 1]));
>
> Fix is correct, but commit message does not explain properly why this
> is required. Basically we need to downmix X frames from input buffer
> and this number is "bytes / (number_of_channels * sample_size)" - so
> we were missing "sample_size" here. I think adding inline comment to
> explain this would be also good.
I my code I use frame_num instead of bytes.
Best regards
Andrei Emeltchenko
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