Op 24 dec. 2013, om 15:37 heeft Fahad Arslan <[email protected]> het volgende geschreven:
> From: Fahad Arslan <[email protected]> > > Pulseaudio uses Speex to do resampling. Default Pulseaudio resampler > is speex-float-1. However, Speex recipe in poky configures speex in s/poky/oe-core/ > fixed point. This scenario creates a situation in which audio streams > that need to be resampled are not playedback since input to speex is > zeroed out when flaot input in range of +/-1 is converted to int. > So we are rescaling the input before invoking speex flaot method. s/flaot/float/g > > Upstream-Status: Submitted [[email protected]] > > Signed-off-by: Fahad Arslan <[email protected]> > --- > .../pulseaudio/rescale_input_to_speex_float.patch | 24 ++++++++++++++++++++ > .../pulseaudio/pulseaudio_4.0.bb | 3 ++- > 2 files changed, 26 insertions(+), 1 deletion(-) > create mode 100644 > meta/recipes-multimedia/pulseaudio/pulseaudio/rescale_input_to_speex_float.patch > > diff --git > a/meta/recipes-multimedia/pulseaudio/pulseaudio/rescale_input_to_speex_float.patch > > b/meta/recipes-multimedia/pulseaudio/pulseaudio/rescale_input_to_speex_float.patch > new file mode 100644 > index 0000000..fe5e6a7 > --- /dev/null > +++ > b/meta/recipes-multimedia/pulseaudio/pulseaudio/rescale_input_to_speex_float.patch > @@ -0,0 +1,24 @@ > +diff -Naur a/src/pulsecore/resampler.c b/src/pulsecore/resampler.c > +--- a/src/pulsecore/resampler.c 2013-12-24 18:25:08.164787401 +0500 > ++++ b/src/pulsecore/resampler.c 2013-12-24 18:24:43.056787026 +0500 > +@@ -1347,7 +1347,7 @@ > + > + static void speex_resample_float(pa_resampler *r, const pa_memchunk *input, > unsigned in_n_frames, pa_memchunk *output, unsigned *out_n_frames) { > + float *in, *out; > +- uint32_t inf = in_n_frames, outf = *out_n_frames; > ++ uint32_t inf = in_n_frames, outf = *out_n_frames, i; > + > + pa_assert(r); > + pa_assert(input); > +@@ -1357,6 +1357,11 @@ > + in = pa_memblock_acquire_chunk(input); > + out = pa_memblock_acquire_chunk(output); > + > ++ /* Speex float API scale range is +/-32768 instead of +/-1. > ++ So rescale input before passing it to Speex. */ > ++ for (i = 0; i < inf; i++) > ++ in[i] = 32768.*in[i]; > ++ > + pa_assert_se(speex_resampler_process_interleaved_float(r->speex.state, > in, &inf, out, &outf) == 0); > + > + pa_memblock_release(input->memblock); > diff --git a/meta/recipes-multimedia/pulseaudio/pulseaudio_4.0.bb > b/meta/recipes-multimedia/pulseaudio/pulseaudio_4.0.bb > index b419c54..5afa20b 100644 > --- a/meta/recipes-multimedia/pulseaudio/pulseaudio_4.0.bb > +++ b/meta/recipes-multimedia/pulseaudio/pulseaudio_4.0.bb > @@ -1,7 +1,8 @@ > require pulseaudio.inc > > SRC_URI = > "http://freedesktop.org/software/pulseaudio/releases/pulseaudio-${PV}.tar.xz \ > - file://volatiles.04_pulse" > + file://volatiles.04_pulse \ > + file://rescale_input_to_speex_float.patch" > > SRC_URI[md5sum] = "591f211db2790a7e4d222f2dc6858db3" > SRC_URI[sha256sum] = > "35ceb36bb1822fe54f0b5e4863b4f486769fdfb8ff2111f01fd8778928f9cdae" > -- > 1.7.9.5 > > _______________________________________________ > Openembedded-core mailing list > [email protected] > http://lists.openembedded.org/mailman/listinfo/openembedded-core > _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
