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TODO: delete this file, it is by far outdated

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Original commit message from CVS:
* TODO:
delete this file, it is by far outdated
* ext/alsa/gstalsa.1: remove
* ext/alsa/gstalsa.c: (add_rates), (add_channels), (gst_alsa_caps),
(gst_alsa_check_sample_rates), (gst_alsa_rates_probe),
(gst_alsa_get_caps):
Add HW probing for supported sample rates. Fixes #161704
This commit is contained in:
Stéphane Loeuillet 2005-01-10 17:01:37 +00:00
parent f7b012fa2f
commit dbebd65ced
3 changed files with 129 additions and 69 deletions
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25
TODO
View file

@ -1,25 +0,0 @@
Warning !!! most of those item are probably obsolete :
configure.ac / build :
* version the element check m4
* check GST_* in configure.ac, there is too much in it
* check if we can drop some of the AC_SUBST's for libs and cflags
plugins :
* ext/a52dec check options, it has some arch stuff and some opti stuff that looks dodgy
* ext/arts[d] need a good onceover
* ext/jack plugin is rotten, won't work with current jack versions
* ext/ladspa add header check stuff and dir stuff
* ext/mpeg2dec what to do with the perftest ?
* ext/sdl check SDL optimisation flags
* gst/festival should have checks and stuff and added properly
* gst/wavenc merge gst/wavenc/riff.h and gst-libs/gst/riff/riff-ids.h
* sys/qcam it includes source of the qcam package that might be librified
* gst-libs/gst/riff: do we need those cflags ?
packaging :
* work on spec file :
add plugins with AC stuff (maybe from bits ?)
write script that builds rpm's one from one
get postun script right; gstreamer-register should be installed for example

22
ext/alsa/gstalsa.1
View file

@ -1,22 +0,0 @@
.TH "GStreamer ALSA Plugin" "1" "June 2002" "Christian F. K. Schaller" ""
.SH "NAME"
gstalsa \- GStreamer plugins for recieving and sending audio through the ALSA audio framework
.SH "SYNOPSIS"
pipeline ! \fBalsasink\fR
\fBalsasrc\fR ! pipeline
.SH "DESCRIPTION"
.LP
\fIgstalsa\fP is a plugin to be used with the \fIGStreamer\fP media framework.
The plugin contains several elements that can be used in to interface with an
ALSA sound device. \fIgstalsa\fP contains an element to recieve sound
(\fBalsasrc\fR) aquired through ALSA. Probably the most common use, however, is
to output sound generated by a GStreamer pipeline to an ALSA device
(\fBalsasink\fR).
.SH "SEE ALSO"
.BR gstoss (1),
.BR gstjack (1)
.SH "AUTHOR"
The GStreamer team at http://gstreamer.net/

151
ext/alsa/gstalsa.c
View file

@ -719,8 +719,7 @@ gst_alsa_get_caps_internal (snd_pcm_format_t format)
}
static inline void
add_channels (GstStructure * structure, gint min_rate, gint max_rate,
gint min_channels, gint max_channels)
add_rates (GstStructure * structure, gint min_rate, gint max_rate)
{
if (min_rate < 0) {
min_rate = GST_ALSA_MIN_RATE;
@ -743,6 +742,11 @@ add_channels (GstStructure * structure, gint min_rate, gint max_rate,
gst_structure_set (structure, "rate", GST_TYPE_INT_RANGE, min_rate,
max_rate, NULL);
}
}
static inline void
add_channels (GstStructure * structure, gint min_channels, gint max_channels)
{
if (min_channels < 0) {
min_channels = 1;
max_channels = GST_ALSA_MAX_CHANNELS;
@ -785,7 +789,8 @@ gst_alsa_caps (snd_pcm_format_t format, gint rate, gint channels)
g_assert (ret_caps != NULL);
g_assert (gst_caps_get_size (ret_caps) == 1);
add_channels (gst_caps_get_structure (ret_caps, 0), rate, -1, channels, -1);
add_rates (gst_caps_get_structure (ret_caps, 0), rate, -1);
add_channels (gst_caps_get_structure (ret_caps, 0), channels, -1);
} else {
int i;
GstCaps *temp;
@ -797,7 +802,8 @@ gst_alsa_caps (snd_pcm_format_t format, gint rate, gint channels)
/* can be NULL, because not all alsa formats can be specified as caps */
if (temp != NULL) {
g_assert (gst_caps_get_size (temp) == 1);
add_channels (gst_caps_get_structure (temp, 0), rate, -1, channels, -1);
add_rates (gst_caps_get_structure (temp, 0), rate, -1);
add_channels (gst_caps_get_structure (temp, 0), channels, -1);
gst_caps_append (ret_caps, temp);
}
}
@ -807,6 +813,107 @@ gst_alsa_caps (snd_pcm_format_t format, gint rate, gint channels)
return ret_caps;
}
static int
gst_alsa_check_sample_rates (snd_pcm_t * device_handle,
snd_pcm_hw_params_t * hw_params, unsigned int *tested_rates,
GValue * supported_rates)
{
int i;
char init_done = 0;
GValue value = { 0 };
g_value_init (&value, G_TYPE_INT);
for (i = 0; tested_rates[i] != 0; i++) {
if (!snd_pcm_hw_params_test_rate (device_handle, hw_params, tested_rates[i],
0)) {
if (!init_done) {
/* at least one sample rate supported */
g_value_init (supported_rates, GST_TYPE_LIST);
init_done = 1;
}
g_value_set_int (&value, tested_rates[i]);
gst_value_list_append_value (supported_rates, &value);
}
}
// only one -> G_TYPE_INT
g_value_unset (&value);
return init_done;
}
static int
gst_alsa_rates_probe (snd_pcm_t * device_handle,
snd_pcm_hw_params_t * hw_params, GValue * supported_rates)
{
unsigned int common_rates[] =
{ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 88200,
96000, 192000, 0
};
unsigned int uncommon_rates[] = { 12345, 0 }; /* this dummy sample rate should only be supported by a software device */
int ret;
int dir;
unsigned int min_rate, max_rate;
/* Get MIN/MAX supported rate */
snd_pcm_hw_params_get_rate_min (hw_params, &min_rate, &dir);
min_rate =
min_rate <
GST_ALSA_MIN_RATE ? GST_ALSA_MIN_RATE : (min_rate +
GST_ALSA_DIR_MIN (dir));
snd_pcm_hw_params_get_rate_max (hw_params, &max_rate, &dir);
max_rate =
max_rate >
GST_ALSA_MAX_RATE ? GST_ALSA_MAX_RATE : (max_rate +
GST_ALSA_DIR_MAX (dir));
ret =
gst_alsa_check_sample_rates (device_handle, hw_params, uncommon_rates,
supported_rates);
if (ret) {
/* Uncommon sample rates supported, it is certainly a "software"/dummy device */
g_value_unset (supported_rates);
g_value_init (supported_rates, GST_TYPE_INT_RANGE);
if (min_rate != max_rate) {
gst_value_set_int_range (supported_rates, min_rate, max_rate);
} else {
/* Only one supported */
g_value_unset (supported_rates);
g_value_init (supported_rates, G_TYPE_INT);
g_value_set_int (supported_rates, min_rate);
}
} else {
/* Check common sample rates for real hardware support */
ret =
gst_alsa_check_sample_rates (device_handle, hw_params, common_rates,
supported_rates);
if (ret) {
if (gst_value_list_get_size (supported_rates) == 1) {
/* Only one supported */
GValue *rate = (GValue *) gst_value_list_get_value (supported_rates, 0);
min_rate = g_value_get_int (rate);
g_value_unset (supported_rates);
g_value_init (supported_rates, G_TYPE_INT);
g_value_set_int (supported_rates, min_rate);
}
} else {
/* No sample rate supported ?! WTF */
return 0;
}
}
return 0;
}
/* Return better caps when device is open */
GstCaps *
gst_alsa_get_caps (GstPad * pad)
@ -815,7 +922,7 @@ gst_alsa_get_caps (GstPad * pad)
snd_pcm_hw_params_t *hw_params;
snd_pcm_format_mask_t *mask;
int i;
unsigned int min_rate, max_rate;
GValue supported_rates = { 0 };
unsigned int min_period_cnt, max_period_cnt;
snd_pcm_uframes_t min_period_sz, max_period_sz;
snd_pcm_uframes_t min_buffer_sz, max_buffer_sz;
@ -840,26 +947,20 @@ gst_alsa_get_caps (GstPad * pad)
min_channels = 1;
max_channels = -1;
} else {
ERROR_CHECK (snd_pcm_hw_params_get_channels_min (hw_params, &min_rate),
ERROR_CHECK (snd_pcm_hw_params_get_channels_min (hw_params, &min_channels),
"Couldn't get minimum channel count for device %s: %s", this->device);
ERROR_CHECK (snd_pcm_hw_params_get_channels_max (hw_params, &max_rate),
ERROR_CHECK (snd_pcm_hw_params_get_channels_max (hw_params, &max_channels),
"Couldn't get maximum channel count for device %s: %s", this->device);
min_channels = min_rate;
min_channels = min_channels < 1 ? 1 : min_channels;
max_channels =
max_rate > GST_ALSA_MAX_CHANNELS ? GST_ALSA_MAX_CHANNELS : max_rate;
max_channels >
GST_ALSA_MAX_CHANNELS ? GST_ALSA_MAX_CHANNELS : max_channels;
}
ERROR_CHECK (snd_pcm_hw_params_get_rate_min (hw_params, &min_rate, &i),
"Couldn't get minimum rate for device %s: %s", this->device);
min_rate =
min_rate <
GST_ALSA_MIN_RATE ? GST_ALSA_MIN_RATE : (min_rate + GST_ALSA_DIR_MIN (i));
ERROR_CHECK (snd_pcm_hw_params_get_rate_max (hw_params, &max_rate, &i),
"Couldn't get maximum rate for device %s: %s", this->device);
max_rate =
max_rate >
GST_ALSA_MAX_RATE ? GST_ALSA_MAX_RATE : (max_rate + GST_ALSA_DIR_MAX (i));
/* Check available sample rates */
if (!gst_alsa_rates_probe (this->handle, hw_params, &supported_rates)) {
;
}
/* Probe period_count and adjust default/user provided value against probed MIN/MAX */
ERROR_CHECK (snd_pcm_hw_params_get_periods_min (hw_params, &min_period_cnt,
@ -940,8 +1041,12 @@ gst_alsa_get_caps (GstPad * pad)
gint n;
g_assert (gst_caps_get_size (caps) == 1);
add_channels (gst_caps_get_structure (caps, 0), min_rate, max_rate,
min_channels, max_channels);
gst_structure_set_value (gst_caps_get_structure (caps, 0), "rate",
&supported_rates);
add_channels (gst_caps_get_structure (caps, 0), min_channels,
max_channels);
/* channel configuration */
/* MIN used to spped up because we don't support more than 8 channels */
@ -1000,6 +1105,8 @@ gst_alsa_get_caps (GstPad * pad)
gst_caps_do_simplify (ret);
GST_LOG_OBJECT (this, "get_caps returns %P", ret);
g_value_unset (&supported_rates);
this->cached_caps = gst_caps_copy (ret);
return ret;
}