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ext/alsa/gstalsasink.c: query witdh capabilities from alsa, fixes #338919

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Original commit message from CVS:
* ext/alsa/gstalsasink.c: (gst_alsasink_getcaps),
(alsasink_parse_spec):
query witdh capabilities from alsa, fixes #338919
This commit is contained in:
Stefan Kost 2006-04-28 19:08:34 +00:00
parent 6a6acca4e8
commit 9917b1449d
2 changed files with 36 additions and 4 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2006-04-28 Stefan Kost <ensonic@users.sf.net>
* ext/alsa/gstalsasink.c: (gst_alsasink_getcaps),
(alsasink_parse_spec):
query witdh capabilities from alsa, fixes #338919
2006-04-28 Wim Taymans <wim@fluendo.com>
* gst/tcp/gstmultifdsink.c: (gst_multi_fd_sink_class_init),

34
ext/alsa/gstalsasink.c
View file

@ -58,7 +58,7 @@
#include <gst/audio/multichannel.h>
/* elementfactory information */
static GstElementDetails gst_alsasink_details =
static const GstElementDetails gst_alsasink_details =
GST_ELEMENT_DETAILS ("Audio sink (ALSA)",
"Sink/Audio",
"Output to a sound card via ALSA",
@ -386,8 +386,20 @@ gst_alsasink_getcaps (GstBaseSink * bsink)
GstAlsaSink *sink = GST_ALSA_SINK (bsink);
GstCaps *tmpl_caps;
GstCaps *caps = NULL;
GstStructure *s;
guint min, max;
gint i, err, min_channels, max_channels;
gint i, err, width;
gint min_channels, max_channels;
guint bits = 0;
static const int audio_fmts[] = {
SND_PCM_FORMAT_U8, SND_PCM_FORMAT_S8,
SND_PCM_FORMAT_S16, SND_PCM_FORMAT_U16,
/*SND_PCM_FORMAT_S24, SND_PCM_FORMAT_U24, */
SND_PCM_FORMAT_S32, SND_PCM_FORMAT_U32
};
static const guint audio_bits[] = {
8, 8, 16, 16, 32, 32
};
if (sink->handle == NULL) {
GST_DEBUG_OBJECT (sink, "device not open, using template caps");
@ -435,6 +447,14 @@ gst_alsasink_getcaps (GstBaseSink * bsink)
snd_pcm_format_mask_alloca (&mask);
snd_pcm_hw_params_get_format_mask (hw_params, mask);
for (i = 0; i < 6; i++) {
if (snd_pcm_format_mask_test (mask, audio_fmts[i])) {
bits |= audio_bits[i];
}
}
GST_LOG_OBJECT (sink, "Bits = 0x%08x", bits);
/* fill caps according to capabilities gathered above */
element_class = GST_ELEMENT_GET_CLASS (sink);
pad_template = gst_element_class_get_pad_template (element_class, "sink");
@ -446,8 +466,14 @@ gst_alsasink_getcaps (GstBaseSink * bsink)
caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (tmpl_caps); ++i) {
caps_add_channel_configuration (caps,
gst_caps_get_structure (tmpl_caps, i), min_channels, max_channels);
s = gst_caps_get_structure (tmpl_caps, i);
gst_structure_get_int (s, "width", &width);
/* TODO: filter signed/unsigned */
if (bits & width) {
caps_add_channel_configuration (caps, s, min_channels, max_channels);
} else {
GST_LOG_OBJECT (sink, "width = %d unsupported", width);
}
}
sink->cached_caps = gst_caps_ref (caps);