add support for specifying sample format (#317)

API: ausrc and auplay

- add config items for ausrc/auplay format:

  ausrc_format     s16|float
  auplay_format    s16|float

- audio.c: convert audio samples to/from signed 16-bit

Modules:

alsa
add test for sample format FLOAT
rst: add support for FLOAT sample format
audiounit: add support for FLOAT sample format
coreaudio: check for signed 16-bit audio format
oss: check for signed 16-bit sample format
winwave: check for S16LE
pulse: add support for FLOAT sample format
sndio: check for S16 format
gst1: check sample format
aufile: check sample format
aubridge: check sample format
gst: check sample format
opensles: check for S16 sample format
jack: check sample format
alsa: remove usage of local config

test: change samples to void pointer
test: change sample type to void pointer

1 files changed, 17 insertions, 4 deletions

diff --git a/modules/pulse/recorder.c b/modules/pulse/recorder.c
index 64df6c4..8ef1b96 100644
--- a/modules/pulse/recorder.c
+++ b/modules/pulse/recorder.c
@@ -18,8 +18,9 @@ struct ausrc_st {
 	pa_simple *s;
 	pthread_t thread;
 	bool run;
-	int16_t *sampv;
+	void *sampv;
 	size_t sampc;
+	size_t sampsz;
 	ausrc_read_h *rh;
 	void *arg;
 };
@@ -46,7 +47,7 @@ static void ausrc_destructor(void *arg)
 static void *read_thread(void *arg)
 {
 	struct ausrc_st *st = arg;
-	const size_t num_bytes = st->sampc * 2;
+	const size_t num_bytes = st->sampc * st->sampsz;
 	int ret, pa_error = 0;
 
 	while (st->run) {
@@ -65,6 +66,17 @@ static void *read_thread(void *arg)
 }
 
 
+static int aufmt_to_pulse_format(enum aufmt fmt)
+{
+	switch (fmt) {
+
+	case AUFMT_S16LE:  return PA_SAMPLE_S16NE;
+	case AUFMT_FLOAT:  return PA_SAMPLE_FLOAT32NE;
+	default: return 0;
+	}
+}
+
+
 int pulse_recorder_alloc(struct ausrc_st **stp, const struct ausrc *as,
 			 struct media_ctx **ctx,
 			 struct ausrc_prm *prm, const char *device,
@@ -95,14 +107,15 @@ int pulse_recorder_alloc(struct ausrc_st **stp, const struct ausrc *as,
 	st->arg = arg;
 
 	st->sampc = prm->srate * prm->ch * prm->ptime / 1000;
+	st->sampsz = aufmt_sample_size(prm->fmt);
 
-	st->sampv = mem_alloc(2 * st->sampc, NULL);
+	st->sampv = mem_alloc(st->sampsz * st->sampc, NULL);
 	if (!st->sampv) {
 		err = ENOMEM;
 		goto out;
 	}
 
-	ss.format   = PA_SAMPLE_S16NE;
+	ss.format   = aufmt_to_pulse_format(prm->fmt);
 	ss.channels = prm->ch;
 	ss.rate     = prm->srate;