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audio: split sample conversion and volume mixing

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Refactor the volume mixing, so it can be reused for capturing devices.
Additionally, it removes superfluous multiplications with the nominal
volume within the hardware voice code path.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Michael Walle 2011-01-05 01:05:47 +01:00 committed by malc
parent 0f136d9e06
commit 00e076795f
13 changed files with 52 additions and 55 deletions
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2
audio/alsaaudio.c
View File

@ -1097,7 +1097,7 @@ static int alsa_run_in (HWVoiceIn *hw)
}
}
hw->conv (dst, src, nread, &nominal_volume);
hw->conv (dst, src, nread);
src = advance (src, nread << hwshift);
dst += nread;

11
audio/audio.c
View File

@ -104,7 +104,7 @@ static struct {
static AudioState glob_audio_state;
struct mixeng_volume nominal_volume = {
const struct mixeng_volume nominal_volume = {
.mute = 0,
#ifdef FLOAT_MIXENG
.r = 1.0,
@ -702,13 +702,11 @@ void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
/*
* Capture
*/
static void noop_conv (struct st_sample *dst, const void *src,
int samples, struct mixeng_volume *vol)
static void noop_conv (struct st_sample *dst, const void *src, int samples)
{
(void) src;
(void) dst;
(void) samples;
(void) vol;
}
static CaptureVoiceOut *audio_pcm_capture_find_specific (
@ -956,6 +954,8 @@ int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
total += isamp;
}
mixeng_volume (sw->buf, ret, &sw->vol);
sw->clip (buf, sw->buf, ret);
sw->total_hw_samples_acquired += total;
return ret << sw->info.shift;
@ -1037,7 +1037,8 @@ int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
swlim = ((int64_t) dead << 32) / sw->ratio;
swlim = audio_MIN (swlim, samples);
if (swlim) {
sw->conv (sw->buf, buf, swlim, &sw->vol);
sw->conv (sw->buf, buf, swlim);
mixeng_volume (sw->buf, swlim, &sw->vol);
}
while (swlim) {

2
audio/audio_int.h
View File

@ -211,7 +211,7 @@ extern struct audio_driver esd_audio_driver;
extern struct audio_driver pa_audio_driver;
extern struct audio_driver spice_audio_driver;
extern struct audio_driver winwave_audio_driver;
extern struct mixeng_volume nominal_volume;
extern const struct mixeng_volume nominal_volume;
void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as);
void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len);

4
audio/dsoundaudio.c
View File

@ -831,11 +831,11 @@ static int dsound_run_in (HWVoiceIn *hw)
decr = len1 + len2;
if (p1 && len1) {
hw->conv (hw->conv_buf + hw->wpos, p1, len1, &nominal_volume);
hw->conv (hw->conv_buf + hw->wpos, p1, len1);
}
if (p2 && len2) {
hw->conv (hw->conv_buf, p2, len2, &nominal_volume);
hw->conv (hw->conv_buf, p2, len2);
}
dsound_unlock_in (dscb, p1, p2, blen1, blen2);

3
audio/esdaudio.c
View File

@ -346,8 +346,7 @@ static void *qesd_thread_in (void *arg)
break;
}
hw->conv (hw->conv_buf + wpos, buf, nread >> hw->info.shift,
&nominal_volume);
hw->conv (hw->conv_buf + wpos, buf, nread >> hw->info.shift);
wpos = (wpos + chunk) % hw->samples;
to_grab -= chunk;
}

4
audio/fmodaudio.c
View File

@ -488,10 +488,10 @@ static int fmod_run_in (HWVoiceIn *hw)
decr = len1 + len2;
if (p1 && blen1) {
hw->conv (hw->conv_buf + hw->wpos, p1, len1, &nominal_volume);
hw->conv (hw->conv_buf + hw->wpos, p1, len1);
}
if (p2 && len2) {
hw->conv (hw->conv_buf, p2, len2, &nominal_volume);
hw->conv (hw->conv_buf, p2, len2);
}
fmod_unlock_sample (fmd->fmod_sample, p1, p2, blen1, blen2);

25
audio/mixeng.c
View File

@ -333,3 +333,28 @@ void mixeng_clear (struct st_sample *buf, int len)
{
memset (buf, 0, len * sizeof (struct st_sample));
}
void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol)
{
#ifdef CONFIG_MIXEMU
if (vol->mute) {
mixeng_clear (buf, len);
return;
}
while (len--) {
#ifdef FLOAT_MIXENG
buf->l = buf->l * vol->l;
buf->r = buf->r * vol->r;
#else
buf->l = (buf->l * vol->l) >> 32;
buf->r = (buf->r * vol->r) >> 32;
#endif
buf += 1;
}
#else
(void) buf;
(void) len;
(void) vol;
#endif
}

4
audio/mixeng.h
View File

@ -33,8 +33,7 @@ struct mixeng_volume { int mute; int64_t r; int64_t l; };
struct st_sample { int64_t l; int64_t r; };
#endif
typedef void (t_sample) (struct st_sample *dst, const void *src,
int samples, struct mixeng_volume *vol);
typedef void (t_sample) (struct st_sample *dst, const void *src, int samples);
typedef void (f_sample) (void *dst, const struct st_sample *src, int samples);
extern t_sample *mixeng_conv[2][2][2][3];
@ -47,5 +46,6 @@ void st_rate_flow_mix (void *opaque, struct st_sample *ibuf, struct st_sample *o
int *isamp, int *osamp);
void st_rate_stop (void *opaque);
void mixeng_clear (struct st_sample *buf, int len);
void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol);
#endif /* mixeng.h */

39
audio/mixeng_template.h
View File

@ -31,16 +31,6 @@
#define HALF (IN_MAX >> 1)
#endif
#ifdef CONFIG_MIXEMU
#ifdef FLOAT_MIXENG
#define VOL(a, b) ((a) * (b))
#else
#define VOL(a, b) ((a) * (b)) >> 32
#endif
#else
#define VOL(a, b) a
#endif
#define ET glue (ENDIAN_CONVERSION, glue (_, IN_T))
#ifdef FLOAT_MIXENG
@ -109,40 +99,26 @@ static inline IN_T glue (clip_, ET) (int64_t v)
#endif
static void glue (glue (conv_, ET), _to_stereo)
(struct st_sample *dst, const void *src, int samples, struct mixeng_volume *vol)
(struct st_sample *dst, const void *src, int samples)
{
struct st_sample *out = dst;
IN_T *in = (IN_T *) src;
#ifdef CONFIG_MIXEMU
if (vol->mute) {
mixeng_clear (dst, samples);
return;
}
#else
(void) vol;
#endif
while (samples--) {
out->l = VOL (glue (conv_, ET) (*in++), vol->l);
out->r = VOL (glue (conv_, ET) (*in++), vol->r);
out->l = glue (conv_, ET) (*in++);
out->r = glue (conv_, ET) (*in++);
out += 1;
}
}
static void glue (glue (conv_, ET), _to_mono)
(struct st_sample *dst, const void *src, int samples, struct mixeng_volume *vol)
(struct st_sample *dst, const void *src, int samples)
{
struct st_sample *out = dst;
IN_T *in = (IN_T *) src;
#ifdef CONFIG_MIXEMU
if (vol->mute) {
mixeng_clear (dst, samples);
return;
}
#else
(void) vol;
#endif
while (samples--) {
out->l = VOL (glue (conv_, ET) (in[0]), vol->l);
out->l = glue (conv_, ET) (in[0]);
out->r = out->l;
out += 1;
in += 1;
@ -174,4 +150,3 @@ static void glue (glue (clip_, ET), _from_mono)
#undef ET
#undef HALF
#undef VOL

3
audio/ossaudio.c
View File

@ -788,8 +788,7 @@ static int oss_run_in (HWVoiceIn *hw)
hw->info.align + 1);
}
read_samples += nread >> hwshift;
hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
&nominal_volume);
hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift);
}
if (bufs[i].len - nread) {

2
audio/paaudio.c
View File

@ -195,7 +195,7 @@ static void *qpa_thread_in (void *arg)
return NULL;
}
hw->conv (hw->conv_buf + wpos, buf, chunk, &nominal_volume);
hw->conv (hw->conv_buf + wpos, buf, chunk);
wpos = (wpos + chunk) % hw->samples;
to_grab -= chunk;
}

5
audio/spiceaudio.c
View File

@ -268,11 +268,10 @@ static int line_in_run (HWVoiceIn *hw)
len[1] = 0;
}
hw->conv (hw->conv_buf + hw->wpos, samples, len[0], &nominal_volume);
hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
if (len[1]) {
hw->conv (hw->conv_buf, samples + len[0], len[1],
&nominal_volume);
hw->conv (hw->conv_buf, samples + len[0], len[1]);
}
hw->wpos = (hw->wpos + num_samples) % hw->samples;

3
audio/winwaveaudio.c
View File

@ -581,8 +581,7 @@ static int winwave_run_in (HWVoiceIn *hw)
int conv = audio_MIN (left, decr);
hw->conv (hw->conv_buf + hw->wpos,
advance (wave->pcm_buf, wave->rpos << hw->info.shift),
conv,
&nominal_volume);
conv);
wave->rpos = (wave->rpos + conv) % hw->samples;
hw->wpos = (hw->wpos + conv) % hw->samples;