mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-08 13:29:59 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

echo-cancel: Enable different sample specs for rec and out stream

Browse source 
Enable advanced AEC methods to use different specs (i.e., number of
channels) for rec and out stream. A typical application is beam forming
resp. multi-channel AEC, which takes multiple record channels to produce
an echo-canceled output stream.
This commit alters the EC API as follows: the EC's init() used to get
source and sink's sample spec/channel map. The new interface renamed
source to rec and sink to play and additionally passes sample spec and
channel map of the out stream. The new parameter names of init()
{rec,play,out}_{ss,map} are more intuitive and also resemble to the
parameter names known from run(). Both rec_{ss,map} and out_{ss,map} are
initialized as we knew it from source_{ss,map} before being passed to
init(). The previous EC implementations only require trivial changes,
i.e., setting rec_{ss,map} to out_{ss,map} at the end of init() in case
that out_{ss,map} is modified in init().
This commit is contained in:
Stefan Huber 2013-02-18 16:31:03 +01:00 • committed by Tanu Kaskinen
parent 17b3cb954b
commit 163430f05b
6 changed files with 132 additions and 94 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/modules/echo-cancel/adrian.c
View file

@ -43,21 +43,25 @@ static const char* const valid_modargs[] = {
NULL
};
static void pa_adrian_ec_fixate_spec(pa_sample_spec *source_ss, pa_channel_map *source_map,
pa_sample_spec *sink_ss, pa_channel_map *sink_map)
static void pa_adrian_ec_fixate_spec(pa_sample_spec *rec_ss, pa_channel_map *rec_map,
pa_sample_spec *play_ss, pa_channel_map *play_map,
pa_sample_spec *out_ss, pa_channel_map *out_map)
{
source_ss->format = PA_SAMPLE_S16NE;
source_ss->channels = 1;
pa_channel_map_init_mono(source_map);
out_ss->format = PA_SAMPLE_S16NE;
out_ss->channels = 1;
pa_channel_map_init_mono(out_map);
*sink_ss = *source_ss;
*sink_map = *source_map;
*play_ss = *out_ss;
*play_map = *out_map;
*rec_ss = *out_ss;
*rec_map = *out_map;
}
pa_bool_t pa_adrian_ec_init(pa_core *c, pa_echo_canceller *ec,
pa_sample_spec *source_ss, pa_channel_map *source_map,
pa_sample_spec *sink_ss, pa_channel_map *sink_map,
uint32_t *nframes, const char *args)
pa_sample_spec *rec_ss, pa_channel_map *rec_map,
pa_sample_spec *play_ss, pa_channel_map *play_map,
pa_sample_spec *out_ss, pa_channel_map *out_map,
uint32_t *nframes, const char *args)
{
int rate, have_vector = 0;
uint32_t frame_size_ms;
@ -74,13 +78,13 @@ pa_bool_t pa_adrian_ec_init(pa_core *c, pa_echo_canceller *ec,
goto fail;
}
pa_adrian_ec_fixate_spec(source_ss, source_map, sink_ss, sink_map);
pa_adrian_ec_fixate_spec(rec_ss, rec_map, play_ss, play_map, out_ss, out_map);
rate = source_ss->rate;
rate = out_ss->rate;
*nframes = (rate * frame_size_ms) / 1000;
ec->params.priv.adrian.blocksize = (*nframes) * pa_frame_size(source_ss);
ec->params.priv.adrian.blocksize = (*nframes) * pa_frame_size(out_ss);
pa_log_debug ("Using nframes %d, blocksize %u, channels %d, rate %d", *nframes, ec->params.priv.adrian.blocksize, source_ss->channels, source_ss->rate);
pa_log_debug ("Using nframes %d, blocksize %u, channels %d, rate %d", *nframes, ec->params.priv.adrian.blocksize, out_ss->channels, out_ss->rate);
/* For now we only support SSE */
if (c->cpu_info.cpu_type == PA_CPU_X86 && (c->cpu_info.flags.x86 & PA_CPU_X86_SSE))