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, 6 insertions, 0 deletions

diff --git a/modules/gst1/gst.c b/modules/gst1/gst.c
index 6f704e5..7510cac 100644
--- a/modules/gst1/gst.c
+++ b/modules/gst1/gst.c
@@ -383,6 +383,12 @@ static int gst_alloc(struct ausrc_st **stp, const struct ausrc *as,
 	if (!prm)
 		return EINVAL;
 
+	if (prm->fmt != AUFMT_S16LE) {
+		warning("gst: unsupported sample format (%s)\n",
+			aufmt_name(prm->fmt));
+		return ENOTSUP;
+	}
+
 	st = mem_zalloc(sizeof(*st), gst_destructor);
 	if (!st)
 		return ENOMEM;