X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=alsa_write.c;h=d115a52db0ae899be1ec003d4f7e060611b0ee94;hp=f24e117be072a757af58f57349e9f26e0e689ef4;hb=3db64b098184e08bfac7939775ad9db9ebfc72fb;hpb=1c859dfc274c592eca267197131d6497b650b24c

diff --git a/alsa_write.c b/alsa_write.c
index f24e117b..d115a52d 100644
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -31,9 +31,6 @@
 #include "alsa_write.cmdline.h"
 #include "error.h"
 
-/** always use 16 bit little endian */
-#define FORMAT SND_PCM_FORMAT_S16_LE
-
 /** Data specific to the alsa writer. */
 struct private_alsa_write_data {
 	/** The alsa handle */
@@ -49,6 +46,7 @@ struct private_alsa_write_data {
 	 * of the writer node group.
 	 */
 	unsigned sample_rate;
+	snd_pcm_format_t sample_format;
 	/**
 	 * The number of channels, given by command line option or the
 	 * decoder of the writer node group.
@@ -57,6 +55,19 @@ struct private_alsa_write_data {
 	struct timeval drain_barrier;
 };
 
+static snd_pcm_format_t get_alsa_pcm_format(enum sample_format sf)
+{
+	switch (sf) {
+	case SF_S8: return SND_PCM_FORMAT_S8;
+	case SF_U8: return SND_PCM_FORMAT_U8;
+	case SF_S16_LE: return SND_PCM_FORMAT_S16_LE;
+	case SF_S16_BE: return SND_PCM_FORMAT_S16_BE;
+	case SF_U16_LE: return SND_PCM_FORMAT_U16_LE;
+	case SF_U16_BE: return SND_PCM_FORMAT_U16_BE;
+	default: return SND_PCM_FORMAT_S16_LE;
+	}
+}
+
 /* Install PCM software and hardware configuration. */
 static int alsa_init(struct private_alsa_write_data *pad,
 		struct alsa_write_args_info *conf)
@@ -80,7 +91,8 @@ static int alsa_init(struct private_alsa_write_data *pad,
 	if (snd_pcm_hw_params_set_access(pad->handle, hwparams,
 			SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
 		return -E_ACCESS_TYPE;
-	if (snd_pcm_hw_params_set_format(pad->handle, hwparams, FORMAT) < 0)
+	if (snd_pcm_hw_params_set_format(pad->handle, hwparams,
+			pad->sample_format) < 0)
 		return -E_SAMPLE_FORMAT;
 	if (snd_pcm_hw_params_set_channels(pad->handle, hwparams,
 			pad->channels) < 0)
@@ -120,7 +132,7 @@ static int alsa_init(struct private_alsa_write_data *pad,
 		return -E_STOP_THRESHOLD;
 	if (snd_pcm_sw_params(pad->handle, swparams) < 0)
 		PARA_WARNING_LOG("unable to install sw params\n");
-	pad->bytes_per_frame = snd_pcm_format_physical_width(FORMAT)
+	pad->bytes_per_frame = snd_pcm_format_physical_width(pad->sample_format)
 		* pad->channels / 8;
 	if (pad->bytes_per_frame <= 0)
 		return -E_PHYSICAL_WIDTH;
@@ -229,22 +241,23 @@ again:
 	}
 	if (!pad->handle) {
 		int32_t val;
+
 		if (bytes == 0) /* no data available */
 			return;
-		ret = get_btr_sample_rate(btrn, &val);
-		if (ret < 0)
-			goto err;
+		get_btr_sample_rate(btrn, &val);
 		pad->sample_rate = val;
-		ret = get_btr_channels(btrn, &val);
-		if (ret < 0)
-			goto err;
+		get_btr_channels(btrn, &val);
 		pad->channels = val;
+		get_btr_sample_format(btrn, &val);
+		pad->sample_format = get_alsa_pcm_format(val);
+
 		PARA_INFO_LOG("%d channel(s), %dHz\n", pad->channels,
 			pad->sample_rate);
 		ret = alsa_init(pad, wn->conf);
 		if (ret < 0)
 			goto err;
 		wn->min_iqs = pad->bytes_per_frame;
+		goto again;
 	}
 	frames = bytes / pad->bytes_per_frame;
 	frames = snd_pcm_writei(pad->handle, data, frames);