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Surround sound support.

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Original commit message from CVS:
* ext/a52dec/gsta52dec.c: (gst_a52dec_channels), (gst_a52dec_push),
(gst_a52dec_reneg), (gst_a52dec_loop), (plugin_init):
* ext/alsa/gstalsa.c: (gst_alsa_get_caps):
* ext/alsa/gstalsaplugin.c: (plugin_init):
* ext/dts/gstdtsdec.c: (gst_dtsdec_channels),
(gst_dtsdec_renegotiate), (gst_dtsdec_loop), (plugin_init):
* ext/faad/gstfaad.c: (gst_faad_init), (gst_faad_chanpos_from_gst),
(gst_faad_chanpos_to_gst), (gst_faad_sinkconnect),
(gst_faad_srcgetcaps), (gst_faad_srcconnect), (gst_faad_chain),
(gst_faad_change_state), (plugin_init):
* ext/faad/gstfaad.h:
* ext/vorbis/vorbis.c: (plugin_init):
* ext/vorbis/vorbisdec.c: (vorbis_dec_chain):
* gst-libs/gst/audio/Makefile.am:
* gst-libs/gst/audio/audio.c: (plugin_init):
* gst-libs/gst/audio/multichannel.c:
(gst_audio_check_channel_positions),
(gst_audio_get_channel_positions),
(gst_audio_set_channel_positions),
(gst_audio_set_structure_channel_positions_list),
(add_list_to_struct), (gst_audio_set_caps_channel_positions_list),
(gst_audio_fixate_channel_positions):
* gst-libs/gst/audio/multichannel.h:
* gst-libs/gst/audio/testchannels.c: (main):
* gst/audioconvert/gstaudioconvert.c:
(gst_audio_convert_class_init), (gst_audio_convert_init),
(gst_audio_convert_dispose), (gst_audio_convert_getcaps),
(gst_audio_convert_parse_caps), (gst_audio_convert_link),
(gst_audio_convert_fixate), (gst_audio_convert_channels):
* gst/audioconvert/plugin.c: (plugin_init):
Surround sound support.
This commit is contained in:
Ronald S. Bultje 2004-11-25 20:36:29 +00:00
parent af874a090d
commit bf45760b33
9 changed files with 1247 additions and 93 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
ChangeLog
View file

@ -1,3 +1,37 @@
2004-11-25 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/a52dec/gsta52dec.c: (gst_a52dec_channels), (gst_a52dec_push),
(gst_a52dec_reneg), (gst_a52dec_loop), (plugin_init):
* ext/alsa/gstalsa.c: (gst_alsa_get_caps):
* ext/alsa/gstalsaplugin.c: (plugin_init):
* ext/dts/gstdtsdec.c: (gst_dtsdec_channels),
(gst_dtsdec_renegotiate), (gst_dtsdec_loop), (plugin_init):
* ext/faad/gstfaad.c: (gst_faad_init), (gst_faad_chanpos_from_gst),
(gst_faad_chanpos_to_gst), (gst_faad_sinkconnect),
(gst_faad_srcgetcaps), (gst_faad_srcconnect), (gst_faad_chain),
(gst_faad_change_state), (plugin_init):
* ext/faad/gstfaad.h:
* ext/vorbis/vorbis.c: (plugin_init):
* ext/vorbis/vorbisdec.c: (vorbis_dec_chain):
* gst-libs/gst/audio/Makefile.am:
* gst-libs/gst/audio/audio.c: (plugin_init):
* gst-libs/gst/audio/multichannel.c:
(gst_audio_check_channel_positions),
(gst_audio_get_channel_positions),
(gst_audio_set_channel_positions),
(gst_audio_set_structure_channel_positions_list),
(add_list_to_struct), (gst_audio_set_caps_channel_positions_list),
(gst_audio_fixate_channel_positions):
* gst-libs/gst/audio/multichannel.h:
* gst-libs/gst/audio/testchannels.c: (main):
* gst/audioconvert/gstaudioconvert.c:
(gst_audio_convert_class_init), (gst_audio_convert_init),
(gst_audio_convert_dispose), (gst_audio_convert_getcaps),
(gst_audio_convert_parse_caps), (gst_audio_convert_link),
(gst_audio_convert_fixate), (gst_audio_convert_channels):
* gst/audioconvert/plugin.c: (plugin_init):
Surround sound support.
2004-11-25 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ogg/gstoggdemux.c: (gst_ogg_demux_push):

80
ext/dts/gstdtsdec.c
View file

@ -26,6 +26,8 @@
#include <stdlib.h>
#include <gst/gst.h>
#include <gst/audio/multichannel.h>
#include <dts.h>
#include "gstdtsdec.h"
@ -180,42 +182,102 @@ gst_dtsdec_init (GstDtsDec * dtsdec)
}
static gint
gst_dtsdec_channels (uint32_t flags)
gst_dtsdec_channels (uint32_t flags, GstAudioChannelPosition ** pos)
{
gint chans = 0;
switch (flags & DTS_CHANNEL_MASK) {
case DTS_MONO:
chans = 1;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 2);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_MONO;
}
break;
case DTS_CHANNEL:
/* case DTS_CHANNEL: */
case DTS_STEREO:
case DTS_STEREO_SUMDIFF:
case DTS_STEREO_TOTAL:
case DTS_DOLBY:
chans = 2;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 3);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
break;
case DTS_3F:
chans = 3;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 4);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
break;
case DTS_2F1R:
chans = 3;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 4);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_REAR_CENTER;
}
break;
case DTS_3F1R:
chans = 4;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 5);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
*pos[3] = GST_AUDIO_CHANNEL_POSITION_REAR_CENTER;
}
break;
case DTS_2F2R:
chans = 4;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 5);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
*pos[3] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
}
break;
case DTS_3F2R:
chans = 5;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 6);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
*pos[3] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
*pos[4] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
}
break;
case DTS_4F2R:
chans = 6;
if (pos) {
*pos = g_new (GstAudioChannelPosition, 7);
*pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
*pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
*pos[2] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
*pos[3] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
*pos[4] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
*pos[5] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
}
break;
default:
/* error */
g_warning ("dtsdec: invalid flags 0x%x", flags);
return 0;
}
if (flags & DTS_LFE)
if (flags & DTS_LFE) {
if (pos) {
*pos[chans] = GST_AUDIO_CHANNEL_POSITION_LFE;
}
chans += 1;
}
return chans;
}
@ -223,8 +285,12 @@ gst_dtsdec_channels (uint32_t flags)
static gboolean
gst_dtsdec_renegotiate (GstDtsDec * dts)
{
GstAudioChannelPosition *pos;
GstCaps *caps = gst_caps_from_string (DTS_CAPS);
gint channels = gst_dtsdec_channels (dts->using_channels);
gint channels = gst_dtsdec_channels (dts->using_channels, &pos);
if (!channels)
return FALSE;
GST_INFO ("dtsdec renegotiate, channels=%d, rate=%d",
channels, dts->sample_rate);
@ -232,6 +298,8 @@ gst_dtsdec_renegotiate (GstDtsDec * dts)
gst_caps_set_simple (caps,
"channels", G_TYPE_INT, channels,
"rate", G_TYPE_INT, (gint) dts->sample_rate, NULL);
gst_audio_set_channel_positions (gst_caps_get_structure (caps, 0), pos);
g_free (pos);
return gst_pad_set_explicit_caps (dts->srcpad, caps);
}
@ -381,7 +449,7 @@ gst_dtsdec_loop (GstElement * element)
}
samples = dts_samples (dts->state);
num_c = gst_dtsdec_channels (dts->using_channels);
num_c = gst_dtsdec_channels (dts->using_channels, NULL);
out = gst_buffer_new_and_alloc ((SAMPLE_WIDTH / 8) * 256 * num_c);
GST_BUFFER_TIMESTAMP (out) = timestamp;
GST_BUFFER_DURATION (out) = GST_SECOND * 256 / dts->sample_rate;
@ -497,7 +565,7 @@ gst_dtsdec_get_property (GObject * object, guint prop_id, GValue * value,
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_library_load ("gstbytestream"))
if (!gst_library_load ("gstbytestream") || !gst_library_load ("gstaudio"))
return FALSE;
if (!gst_element_register (plugin, "dtsdec", GST_RANK_PRIMARY,

389
ext/faad/gstfaad.c
View file

@ -23,6 +23,8 @@
#include <string.h>
#include <gst/audio/multichannel.h>
#include "gstfaad.h"
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
@ -31,20 +33,46 @@ static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_STATIC_CAPS ("audio/mpeg, " "mpegversion = (int) { 2, 4 }")
);
#define STATIC_INT_CAPS(bpp) \
"audio/x-raw-int, " \
"endianness = (int) BYTE_ORDER, " \
"signed = (bool) TRUE, " \
"width = (int) " G_STRINGIFY (bpp) ", " \
"depth = (int) " G_STRINGIFY (bpp) ", " \
"rate = (int) [ 8000, 96000 ], " \
"channels = (int) [ 1, 8 ]"
#define STATIC_FLOAT_CAPS(bpp) \
"audio/x-raw-float, " \
"endianness = (int) BYTE_ORDER, " \
"depth = (int) " G_STRINGIFY (bpp) ", " \
"rate = (int) [ 8000, 96000 ], " \
"channels = (int) [ 1, 8 ]"
/*
* All except 16-bit integer are disabled until someone fixes FAAD.
* FAAD allocates approximately 8*1024*2 bytes bytes, which is enough
* for 1 frame (1024 samples) of 6 channel (5.1) 16-bit integer 16bpp
* audio, but not for any other. You'll get random segfaults, crashes
* and even valgrind goes crazy.
*/
#define STATIC_CAPS \
STATIC_INT_CAPS (16)
#if 0
"; "
STATIC_INT_CAPS (24)
"; "
STATIC_INT_CAPS (32)
"; "
STATIC_FLOAT_CAPS (32)
"; "
STATIC_FLOAT_CAPS (64)
#endif
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (bool) TRUE, "
"width = (int) { 16, 24, 32 }, "
"depth = (int) { 16, 24, 32 }, "
"rate = (int) [ 8000, 96000 ], "
"channels = (int) [ 1, 6 ]; "
"audio/x-raw-float, "
"endianness = (int) BYTE_ORDER, "
"depth = (int) { 32, 64 }, "
"rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 6 ]")
GST_STATIC_CAPS (STATIC_CAPS)
);
static void gst_faad_base_init (GstFaadClass * klass);
@ -123,6 +151,9 @@ gst_faad_init (GstFaad * faad)
faad->samplerate = -1;
faad->channels = -1;
faad->tempbuf = NULL;
faad->need_channel_setup = TRUE;
faad->channel_positions = NULL;
faad->init = FALSE;
GST_FLAG_SET (faad, GST_ELEMENT_EVENT_AWARE);
@ -142,6 +173,102 @@ gst_faad_init (GstFaad * faad)
gst_pad_set_getcaps_function (faad->srcpad, gst_faad_srcgetcaps);
}
/*
* Channel identifier conversion - caller g_free()s result!
*/
static guchar *
gst_faad_chanpos_from_gst (GstAudioChannelPosition * pos, guint num)
{
guchar *fpos = g_new (guchar, num);
guint n;
for (n = 0; n < num; n++) {
switch (pos[n]) {
case GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT:
fpos[n] = FRONT_CHANNEL_LEFT;
break;
case GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT:
fpos[n] = FRONT_CHANNEL_RIGHT;
break;
case GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER:
fpos[n] = FRONT_CHANNEL_CENTER;
break;
case GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT:
fpos[n] = SIDE_CHANNEL_LEFT;
break;
case GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT:
fpos[n] = SIDE_CHANNEL_RIGHT;
break;
case GST_AUDIO_CHANNEL_POSITION_REAR_LEFT:
fpos[n] = BACK_CHANNEL_LEFT;
break;
case GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT:
fpos[n] = BACK_CHANNEL_RIGHT;
break;
case GST_AUDIO_CHANNEL_POSITION_REAR_CENTER:
fpos[n] = BACK_CHANNEL_CENTER;
break;
case GST_AUDIO_CHANNEL_POSITION_LFE:
fpos[n] = LFE_CHANNEL;
break;
default:
GST_WARNING ("Unsupported GST channel position 0x%x encountered",
pos[n]);
g_free (fpos);
return NULL;
}
}
return fpos;
}
static GstAudioChannelPosition *
gst_faad_chanpos_to_gst (guchar * fpos, guint num)
{
GstAudioChannelPosition *pos = g_new (GstAudioChannelPosition, num);
guint n;
for (n = 0; n < num; n++) {
switch (fpos[n]) {
case FRONT_CHANNEL_LEFT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
break;
case FRONT_CHANNEL_RIGHT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
break;
case FRONT_CHANNEL_CENTER:
pos[n] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
break;
case SIDE_CHANNEL_LEFT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT;
break;
case SIDE_CHANNEL_RIGHT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT;
break;
case BACK_CHANNEL_LEFT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
break;
case BACK_CHANNEL_RIGHT:
pos[n] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
break;
case BACK_CHANNEL_CENTER:
pos[n] = GST_AUDIO_CHANNEL_POSITION_REAR_CENTER;
break;
case LFE_CHANNEL:
pos[n] = GST_AUDIO_CHANNEL_POSITION_LFE;
break;
default:
GST_WARNING ("Unsupported FAAD channel position 0x%x encountered",
fpos[n]);
g_free (pos);
return NULL;
}
}
return pos;
}
static GstPadLinkReturn
gst_faad_sinkconnect (GstPad * pad, const GstCaps * caps)
{
@ -160,17 +287,20 @@ gst_faad_sinkconnect (GstPad * pad, const GstCaps * caps)
GST_BUFFER_SIZE (buf), &samplerate, &channels) < 0)
return GST_PAD_LINK_REFUSED;
faad->samplerate = samplerate;
faad->channels = channels;
//faad->samplerate = samplerate;
//faad->channels = channels;
faad->init = TRUE;
if (faad->tempbuf) {
gst_buffer_unref (faad->tempbuf);
faad->tempbuf = NULL;
}
return GST_PAD_LINK_OK;
} else {
faad->init = FALSE;
}
faad->need_channel_setup = TRUE;
/* if there's no decoderspecificdata, it's all fine. We cannot know
* much more at this point... */
return GST_PAD_LINK_OK;
@ -180,27 +310,45 @@ static GstCaps *
gst_faad_srcgetcaps (GstPad * pad)
{
GstFaad *faad = GST_FAAD (gst_pad_get_parent (pad));
static GstAudioChannelPosition *supported_positions = NULL;
static gint num_supported_positions = LFE_CHANNEL - FRONT_CHANNEL_CENTER;
GstCaps *templ;
if (!supported_positions) {
guchar *supported_fpos = g_new0 (guchar,
LFE_CHANNEL - FRONT_CHANNEL_CENTER);
gint n;
for (n = 0; n < LFE_CHANNEL - FRONT_CHANNEL_CENTER; n++) {
supported_fpos[n] = n + FRONT_CHANNEL_CENTER;
}
supported_positions = gst_faad_chanpos_to_gst (supported_fpos, n);
g_free (supported_fpos);
}
if (faad->handle != NULL && faad->channels != -1 && faad->samplerate != -1) {
GstCaps *caps = gst_caps_new_empty ();
GstStructure *str;
gint fmt[] = {
FAAD_FMT_16BIT,
#if 0
FAAD_FMT_24BIT,
FAAD_FMT_32BIT,
FAAD_FMT_FLOAT,
FAAD_FMT_DOUBLE,
#endif
-1
}
, n;
for (n = 0; fmt[n] != -1; n++) {
switch (n) {
switch (fmt[n]) {
case FAAD_FMT_16BIT:
str = gst_structure_new ("audio/x-raw-int",
"signed", G_TYPE_BOOLEAN, TRUE,
"width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, NULL);
break;
#if 0
case FAAD_FMT_24BIT:
str = gst_structure_new ("audio/x-raw-int",
"signed", G_TYPE_BOOLEAN, TRUE,
@ -219,6 +367,7 @@ gst_faad_srcgetcaps (GstPad * pad)
str = gst_structure_new ("audio/x-raw-float",
"depth", G_TYPE_INT, 64, NULL);
break;
#endif
default:
str = NULL;
break;
@ -234,8 +383,26 @@ gst_faad_srcgetcaps (GstPad * pad)
if (faad->channels != -1) {
gst_structure_set (str, "channels", G_TYPE_INT, faad->channels, NULL);
/* put channel information here */
if (faad->channel_positions) {
GstAudioChannelPosition *pos;
pos = gst_faad_chanpos_to_gst (faad->channel_positions,
faad->channels);
if (!pos) {
gst_structure_free (str);
continue;
}
gst_audio_set_channel_positions (str, pos);
g_free (pos);
} else {
gst_structure_set (str, "channels", GST_TYPE_INT_RANGE, 1, 6, NULL);
gst_audio_set_structure_channel_positions_list (str,
supported_positions, num_supported_positions);
}
} else {
gst_structure_set (str, "channels", GST_TYPE_INT_RANGE, 1, 8, NULL);
/* we set channel positions later */
}
gst_structure_set (str, "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
@ -243,10 +410,20 @@ gst_faad_srcgetcaps (GstPad * pad)
gst_caps_append_structure (caps, str);
}
if (faad->channels == -1) {
gst_audio_set_caps_channel_positions_list (caps,
supported_positions, num_supported_positions);
}
return caps;
}
return gst_caps_copy (GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad)));
/* template with channel positions */
templ = gst_caps_copy (GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad)));
gst_audio_set_caps_channel_positions_list (templ,
supported_positions, num_supported_positions);
return templ;
}
static GstPadLinkReturn
@ -258,11 +435,13 @@ gst_faad_srcconnect (GstPad * pad, const GstCaps * caps)
gint depth, rate, channels;
GstFaad *faad = GST_FAAD (gst_pad_get_parent (pad));
if (!faad->handle || (faad->samplerate == -1 || faad->channels == -1)) {
structure = gst_caps_get_structure (caps, 0);
if (!faad->handle || (faad->samplerate == -1 || faad->channels == -1) ||
!faad->channel_positions) {
return GST_PAD_LINK_DELAYED;
}
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
/* Samplerate and channels are normally provided through
@ -273,6 +452,30 @@ gst_faad_srcconnect (GstPad * pad, const GstCaps * caps)
return GST_PAD_LINK_REFUSED;
}
/* Another internal checkup. */
if (faad->need_channel_setup) {
GstAudioChannelPosition *pos;
guchar *fpos;
guint i;
pos = gst_audio_get_channel_positions (structure);
if (!pos) {
return GST_PAD_LINK_DELAYED;
}
fpos = gst_faad_chanpos_from_gst (pos, faad->channels);
g_free (pos);
if (!fpos)
return GST_PAD_LINK_REFUSED;
for (i = 0; i < faad->channels; i++) {
if (fpos[i] != faad->channel_positions[i]) {
g_free (fpos);
return GST_PAD_LINK_REFUSED;
}
}
g_free (fpos);
}
if (!strcmp (mimetype, "audio/x-raw-int")) {
gint width;
@ -286,39 +489,47 @@ gst_faad_srcconnect (GstPad * pad, const GstCaps * caps)
case 16:
fmt = FAAD_FMT_16BIT;
break;
#if 0
case 24:
fmt = FAAD_FMT_24BIT;
break;
case 32:
fmt = FAAD_FMT_32BIT;
break;
#endif
}
} else {
if (!gst_structure_get_int (structure, "depth", &depth))
return GST_PAD_LINK_REFUSED;
switch (depth) {
#if 0
case 32:
fmt = FAAD_FMT_FLOAT;
break;
case 64:
fmt = FAAD_FMT_DOUBLE;
break;
#endif
}
}
if (fmt != -1) {
faacDecConfiguration *conf;
g_print ("Set format %d\n", fmt);
conf = faacDecGetCurrentConfiguration (faad->handle);
conf->outputFormat = fmt;
faacDecSetConfiguration (faad->handle, conf);
g_print ("Trying to conf\n");
if (faacDecSetConfiguration (faad->handle, conf) == 0)
return GST_PAD_LINK_REFUSED;
g_print ("Done\n");
/* FIXME: handle return value, how? */
faad->bps = depth / 8;
return GST_PAD_LINK_OK;
}
g_print ("Format not recognized\n");
return GST_PAD_LINK_REFUSED;
}
@ -329,7 +540,7 @@ gst_faad_chain (GstPad * pad, GstData * data)
guchar *input_data;
GstFaad *faad = GST_FAAD (gst_pad_get_parent (pad));
GstBuffer *buf, *outbuf;
faacDecFrameInfo info;
faacDecFrameInfo *info;
void *out;
if (GST_IS_EVENT (data)) {
@ -338,18 +549,8 @@ gst_faad_chain (GstPad * pad, GstData * data)
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
if (faad->tempbuf != NULL) {
/* Try to decode the remaining data */
out = faacDecDecode (faad->handle, &info,
GST_BUFFER_DATA (faad->tempbuf), GST_BUFFER_SIZE (faad->tempbuf));
gst_buffer_unref (faad->tempbuf);
faad->tempbuf = NULL;
if (out && !info.error && info.samples > 0) {
outbuf = gst_buffer_new_and_alloc (info.samples * faad->bps);
/* ugh */
memcpy (GST_BUFFER_DATA (outbuf), out, GST_BUFFER_SIZE (outbuf));
gst_pad_push (faad->srcpad, GST_DATA (outbuf));
}
}
gst_element_set_eos (GST_ELEMENT (faad));
gst_pad_push (faad->srcpad, data);
@ -360,55 +561,89 @@ gst_faad_chain (GstPad * pad, GstData * data)
}
}
info = g_new0 (faacDecFrameInfo, 1);
/* buffer + remaining data */
buf = GST_BUFFER (data);
if (faad->samplerate == -1 || faad->channels == -1) {
GstPadLinkReturn ret;
gulong samplerate;
guchar channels;
faacDecInit (faad->handle,
GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), &samplerate, &channels);
faad->samplerate = samplerate;
faad->channels = channels;
ret = gst_pad_renegotiate (faad->srcpad);
if (GST_PAD_LINK_FAILED (ret)) {
GST_ELEMENT_ERROR (faad, CORE, NEGOTIATION, (NULL), (NULL));
gst_buffer_unref (buf);
return;
}
}
/* Use the leftovers */
if (faad->tempbuf) {
buf = gst_buffer_join (faad->tempbuf, buf);
faad->tempbuf = NULL;
}
/* init if not already done during capsnego */
if (!faad->init) {
gulong samplerate;
guchar channels;
faacDecInit (faad->handle,
GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), &samplerate, &channels);
faad->init = TRUE;
/* store for renegotiation later on */
info->samplerate = samplerate;
info->channels = channels;
} else {
info->samplerate = 0;
info->channels = 0;
}
/* decode cycle */
input_data = GST_BUFFER_DATA (buf);
input_size = GST_BUFFER_SIZE (buf);
info.bytesconsumed = input_size;
while (input_size > (faad->channels * FAAD_MIN_STREAMSIZE)
&& info.bytesconsumed > 0) {
out = faacDecDecode (faad->handle, &info, input_data, input_size);
if (info.error) {
info->bytesconsumed = input_size;
while (input_size >= FAAD_MIN_STREAMSIZE && info->bytesconsumed > 0) {
g_print ("Decoding %d bytes of data\n", input_size);
out = faacDecDecode (faad->handle, info, input_data, input_size);
g_print ("done, rec. %p\n", out);
if (info->error) {
GST_ELEMENT_ERROR (faad, STREAM, DECODE, (NULL),
("Failed to decode buffer: %s", faacDecGetErrorMessage (info.error)));
("Failed to decode buffer: %s",
faacDecGetErrorMessage (info->error)));
break;
}
input_size -= info.bytesconsumed;
input_data += info.bytesconsumed;
if (info->bytesconsumed > input_size)
info->bytesconsumed = input_size;
input_size -= info->bytesconsumed;
input_data += info->bytesconsumed;
if (out) {
if (out && info->samples > 0) {
gboolean fmt_change = FALSE;
if (info.samplerate != faad->samplerate
|| info.channels != faad->channels) {
/* see if we need to renegotiate */
if (info->samplerate != faad->samplerate ||
info->channels != faad->channels || !faad->channel_positions) {
fmt_change = TRUE;
} else {
gint i;
for (i = 0; i < info->channels; i++) {
if (info->channel_position[i] != faad->channel_positions[i])
fmt_change = TRUE;
}
}
if (fmt_change) {
GstPadLinkReturn ret;
faad->samplerate = info.samplerate;
faad->channels = info.channels;
g_print ("Format change\n");
g_print ("To %ld Hz, %d chans, %d/%d/%d/%d/%d/%d\n",
info->samplerate, info->channels,
info->channel_position[0],
info->channel_position[1],
info->channel_position[2],
info->channel_position[3],
info->channel_position[4], info->channel_position[5]);
/* store new negotiation information */
faad->samplerate = info->samplerate;
faad->channels = info->channels;
if (faad->channel_positions)
g_free (faad->channel_positions);
faad->channel_positions = g_new (guint8, faad->channels);
memcpy (faad->channel_positions, info->channel_position,
faad->channels);
/* and negotiate */
ret = gst_pad_renegotiate (faad->srcpad);
if (GST_PAD_LINK_FAILED (ret)) {
GST_ELEMENT_ERROR (faad, CORE, NEGOTIATION, (NULL), (NULL));
@ -416,30 +651,35 @@ gst_faad_chain (GstPad * pad, GstData * data)
}
}
if (info.samples > 0) {
outbuf = gst_buffer_new_and_alloc (info.samples * faad->bps);
/* play decoded data */
if (info->samples > 0) {
g_print ("Playing %ld samples from buf %p\n", info->samples, out);
outbuf = gst_buffer_new_and_alloc (info->samples * faad->bps);
/* ugh */
memcpy (GST_BUFFER_DATA (outbuf), out, GST_BUFFER_SIZE (outbuf));
g_print ("done, to %p\n", GST_BUFFER_DATA (outbuf));
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
gst_pad_push (faad->srcpad, GST_DATA (outbuf));
}
}
};
}
/* Keep the leftovers */
if (input_size > 0) {
if (input_size < GST_BUFFER_SIZE (buf))
if (input_size < GST_BUFFER_SIZE (buf)) {
faad->tempbuf = gst_buffer_create_sub (buf,
GST_BUFFER_SIZE (buf) - input_size, input_size);
else {
} else {
faad->tempbuf = buf;
gst_buffer_ref (buf);
}
}
gst_buffer_unref (buf);
g_free (info);
}
static GstElementStateReturn
@ -463,6 +703,10 @@ gst_faad_change_state (GstElement * element)
case GST_STATE_PAUSED_TO_READY:
faad->samplerate = -1;
faad->channels = -1;
faad->need_channel_setup = TRUE;
faad->init = FALSE;
g_free (faad->channel_positions);
faad->channel_positions = NULL;
break;
case GST_STATE_READY_TO_NULL:
faacDecClose (faad->handle);
@ -485,7 +729,8 @@ gst_faad_change_state (GstElement * element)
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "faad", GST_RANK_PRIMARY, GST_TYPE_FAAD);
return gst_library_load ("gstaudio") &&
gst_element_register (plugin, "faad", GST_RANK_PRIMARY, GST_TYPE_FAAD);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

5
ext/faad/gstfaad.h
View file

@ -52,6 +52,11 @@ typedef struct _GstFaad {
/* FAAD object */
faacDecHandle handle;
gboolean init;
/* FAAD channel setup */
guchar *channel_positions;
gboolean need_channel_setup;
} GstFaad;
typedef struct _GstFaadClass {

30
gst-libs/gst/audio/Makefile.am
View file

@ -1,15 +1,32 @@
# variables used for enum/marshal generation
glib_enum_headers=multichannel.h
glib_enum_define=GST_AUDIO
glib_enum_prefix=gst_audio
built_sources = multichannel-enumtypes.c
built_headers = multichannel-enumtypes.h
BUILT_SOURCES = $(built_sources) $(built_headers)
librarydir = $(libdir)/gstreamer-@GST_MAJORMINOR@
library_LTLIBRARIES = libgstaudio.la libgstaudiofilter.la
noinst_LTLIBRARIES = libgstaudiofilterexample.la
EXTRA_DIST = gstaudiofiltertemplate.c make_filter
CLEANFILES = gstaudiofilterexample.c
CLEANFILES = gstaudiofilterexample.c \
$(BUILT_SOURCES)
libgstaudio_la_SOURCES = audio.c audioclock.c
libgstaudio_la_SOURCES = audio.c audioclock.c \
multichannel.c
nodist_libgstaudio_la_SOURCES = $(built_sources)
libgstaudioincludedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/audio
libgstaudioinclude_HEADERS = audio.h audioclock.h gstaudiofilter.h
libgstaudioinclude_HEADERS = \
audio.h \
audioclock.h \
gstaudiofilter.h \
multichannel.h \
multichannel-enumtypes.h
libgstaudio_la_LIBADD =
libgstaudio_la_CFLAGS = $(GST_CFLAGS)
@ -25,3 +42,10 @@ libgstaudiofilterexample_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
gstaudiofilterexample.c: $(srcdir)/make_filter $(srcdir)/gstaudiofiltertemplate.c
$(srcdir)/make_filter AudiofilterExample $(srcdir)/gstaudiofiltertemplate.c
noinst_PROGRAMS = testchannels
testchannels_SOURCES = testchannels.c
testchannels_CFLAGS = $(GST_CFLAGS)
testchannels_LDFLAGS = $(GST_LIBS)
include $(top_srcdir)/common/glib-gen.mak

3
gst-libs/gst/audio/audio.c
View file

@ -22,6 +22,7 @@
#endif
#include "audio.h"
#include "multichannel-enumtypes.h"
#include <gst/gststructure.h>
@ -267,6 +268,8 @@ gst_audio_structure_set_int (GstStructure * structure, GstAudioFieldFlag flag)
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_audio_channel_position_get_type ();
return TRUE;
}

634
gst-libs/gst/audio/multichannel.c Normal file
View file

@ -0,0 +1,634 @@
/* GStreamer Multichannel-Audio helper functions
* (c) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "multichannel.h"
#define GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME "channel-positions"
/*
* This function checks if basic assumptions apply:
* - does each position occur at most once?
* - do conflicting positions occur?
* + front_mono vs. front_left/right
* + front_center vs. front_left/right_of_center
* + rear_center vs. rear_left/right
* It also adds some hacks that 0.8.x needs for compatibility:
* - if channels == 1, are we really mono?
* - if channels == 2, are we really stereo?
*/
static gboolean
gst_audio_check_channel_positions (const GstAudioChannelPosition * pos,
gint channels)
{
gint i, n;
struct
{
GstAudioChannelPosition pos1[2];
GstAudioChannelPosition pos2[1];
} conf[] = {
/* front: mono <-> stereo */
{ {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_MONO}},
/* front center: 2 <-> 1 */
{ {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER}},
/* rear: 2 <-> 1 */
{ {
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER}}, { {
GST_AUDIO_CHANNEL_POSITION_INVALID}}
};
/* check for invalid channel positions */
for (n = 0; n < channels; n++) {
if (pos[n] == GST_AUDIO_CHANNEL_POSITION_INVALID) {
g_warning ("Position %d is invalid, not allowed", n);
return FALSE;
}
}
/* check for multiple position occurrences */
for (i = GST_AUDIO_CHANNEL_POSITION_INVALID + 1;
i < GST_AUDIO_CHANNEL_POSITION_NUM; i++) {
gint count = 0;
for (n = 0; n < channels; n++) {
if (pos[n] == i)
count++;
}
if (count > 1) {
g_warning ("Channel position %d occurred %d times, not allowed",
i, count);
return FALSE;
}
}
/* check for position conflicts */
for (i = 0; conf[i].pos1[0] != GST_AUDIO_CHANNEL_POSITION_INVALID; i++) {
gboolean found1 = FALSE, found2 = FALSE;
for (n = 0; n < channels; n++) {
if (pos[n] == conf[i].pos1[0] || pos[n] == conf[i].pos1[1])
found1 = TRUE;
else if (pos[n] == conf[i].pos2[0])
found2 = TRUE;
}
if (found1 && found2) {
g_warning ("Found conflicting channel positions %d/%d and %d",
conf[i].pos1[0], conf[i].pos1[1], conf[i].pos2[0]);
return FALSE;
}
}
/* 0.8.x evilry */
if ((channels == 1 && pos[0] != GST_AUDIO_CHANNEL_POSITION_FRONT_MONO) ||
(channels == 2 && (pos[0] != GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT ||
pos[1] != GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT))) {
g_warning ("0.8.x: channels=1 implies mono; channels=2 implies stereo");
return FALSE;
}
return TRUE;
}
/**
* gst_audio_get_channel_positions:
* @str: A #GstStructure to retrieve channel positions from.
*
* Retrieves a number of (fixed!) audio channel positions from
* the provided #GstStructure and returns it as a newly allocated
* array. The caller should g_free () this array. The caller
* should also check that the members in this #GstStructure are
* indeed "fixed" before calling this function.
*
* Returns: a newly allocated array containing the channel
* positions as provided in the given #GstStructure. Returns
* NULL on error.
*/
GstAudioChannelPosition *
gst_audio_get_channel_positions (GstStructure * str)
{
GstAudioChannelPosition *pos;
gint channels, n;
const GValue *pos_val_arr, *pos_val_entry;
gboolean res;
GType t;
/* get number of channels, general type checkups */
g_return_val_if_fail (str != NULL, NULL);
res = gst_structure_get_int (str, "channels", &channels);
g_return_val_if_fail (res, NULL);
g_return_val_if_fail (channels > 0, NULL);
pos_val_arr = gst_structure_get_value (str,
GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME);
/* The following checks are here to retain compatibility for plugins not
* implementing this property. They expect that channels=1 implies mono
* and channels=2 implies stereo, so we follow that.
* This might be removed during 0.9.x. */
if (!pos_val_arr && (channels == 1 || channels == 2)) {
pos = g_new (GstAudioChannelPosition, channels);
if (channels == 1) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_MONO;
} else {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
return pos;
}
g_return_val_if_fail (pos_val_arr != NULL, NULL);
g_return_val_if_fail (gst_value_list_get_size (pos_val_arr) == channels,
NULL);
for (n = 0; n < channels; n++) {
t = G_VALUE_TYPE (gst_value_list_get_value (pos_val_arr, n));
g_return_val_if_fail (t == GST_TYPE_AUDIO_CHANNEL_POSITION, NULL);
}
/* ... and fill array */
pos = g_new (GstAudioChannelPosition, channels);
for (n = 0; n < channels; n++) {
pos_val_entry = gst_value_list_get_value (pos_val_arr, n);
pos[n] = g_value_get_enum (pos_val_entry);
}
if (!gst_audio_check_channel_positions (pos, channels)) {
g_free (pos);
return NULL;
}
return pos;
}
/**
* gst_audio_set_channel_positions:
* @str: A #GstStructure to retrieve channel positions from.
* @pos: an array of channel positions. The number of members
* in this array should be equal to the (fixed!) number
* of the "channels" property in the given #GstStructure.
*
* Adds a "channel-positions" property to the given #GstStructure,
* which will represent the channel positions as given in the
* provided #GstAudioChannelPosition array.
*/
void
gst_audio_set_channel_positions (GstStructure * str,
const GstAudioChannelPosition * pos)
{
GValue pos_val_arr = { 0 }, pos_val_entry = {
0};
gint channels, n;
gboolean res;
/* get number of channels, checkups */
g_return_if_fail (str != NULL);
g_return_if_fail (pos != NULL);
res = gst_structure_get_int (str, "channels", &channels);
g_return_if_fail (res);
g_return_if_fail (channels > 0);
if (!gst_audio_check_channel_positions (pos, channels))
return;
/* build gvaluearray from positions */
g_value_init (&pos_val_entry, GST_TYPE_AUDIO_CHANNEL_POSITION);
g_value_init (&pos_val_arr, GST_TYPE_FIXED_LIST);
for (n = 0; n < channels; n++) {
g_value_set_enum (&pos_val_entry, pos[n]);
gst_value_list_append_value (&pos_val_arr, &pos_val_entry);
}
g_value_unset (&pos_val_entry);
/* add to structure */
gst_structure_set_value (str,
GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME, &pos_val_arr);
g_value_unset (&pos_val_arr);
}
/**
* gst_audio_set_structure_channel_positions_list:
* @str: #GstStructure to set the list of channel positions
* on.
* @pos: the array containing one or more possible audio
* channel positions that we should add in each value
* of the array in the given structure.
* @num_positions: the number of values in pos.
*
* Sets a (possibly non-fixed) list of possible audio channel
* positions (given in pos) on the given structure. The
* structure, after this function has been called, will contain
* a "channel-positions" property with an array of the size of
* the "channels" property value in the given structure (note
* that this means that the channels property in the provided
* structure should be fixed!). Each value in the array will
* contain each of the values given in the pos array.
*/
void
gst_audio_set_structure_channel_positions_list (GstStructure * str,
const GstAudioChannelPosition * pos, gint num_positions)
{
gint channels, n, c;
GValue pos_val_arr = { 0 }, pos_val_list = {
0}, pos_val_entry = {
0};
gboolean res;
/* get number of channels, general type checkups */
g_return_if_fail (str != NULL);
g_return_if_fail (num_positions > 0);
g_return_if_fail (pos != NULL);
res = gst_structure_get_int (str, "channels", &channels);
g_return_if_fail (res);
g_return_if_fail (channels > 0);
/* 0.8.x: channels=1 or channels=2 is mono/stereo, no positions needed
* there (we discard them anyway) */
if (channels == 1 || channels == 2)
return;
/* create the array of lists */
g_value_init (&pos_val_arr, GST_TYPE_FIXED_LIST);
g_value_init (&pos_val_entry, GST_TYPE_AUDIO_CHANNEL_POSITION);
for (n = 0; n < channels; n++) {
g_value_init (&pos_val_list, GST_TYPE_LIST);
for (c = 0; c < num_positions; c++) {
g_value_set_enum (&pos_val_entry, pos[c]);
gst_value_list_append_value (&pos_val_list, &pos_val_entry);
}
gst_value_list_append_value (&pos_val_arr, &pos_val_list);
g_value_unset (&pos_val_list);
}
g_value_unset (&pos_val_entry);
gst_structure_set_value (str, GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME,
&pos_val_arr);
g_value_unset (&pos_val_arr);
}
/*
* Helper function for below. The structure will be conserved,
* but might be cut down. Any additional structures that were
* created will be stored in the returned caps.
*/
static GstCaps *
add_list_to_struct (GstStructure * str,
const GstAudioChannelPosition * pos, gint num_positions)
{
GstCaps *caps = gst_caps_new_empty ();
const GValue *chan_val;
chan_val = gst_structure_get_value (str, "channels");
if (G_VALUE_TYPE (chan_val) == G_TYPE_INT) {
gst_audio_set_structure_channel_positions_list (str, pos, num_positions);
} else if (G_VALUE_TYPE (chan_val) == GST_TYPE_LIST) {
gint size;
const GValue *sub_val;
size = gst_value_list_get_size (chan_val);
sub_val = gst_value_list_get_value (chan_val, 0);
gst_structure_set_value (str, "channels", sub_val);
gst_caps_append (caps, add_list_to_struct (str, pos, num_positions));
while (--size > 0) {
str = gst_structure_copy (str);
sub_val = gst_value_list_get_value (chan_val, size);
gst_structure_set_value (str, "channels", sub_val);
gst_caps_append (caps, add_list_to_struct (str, pos, num_positions));
gst_caps_append_structure (caps, str);
}
} else if (G_VALUE_TYPE (chan_val) == GST_TYPE_INT_RANGE) {
gint min, max;
min = gst_value_get_int_range_min (chan_val);
max = gst_value_get_int_range_max (chan_val);
gst_structure_set (str, "channels", G_TYPE_INT, min, NULL);
gst_audio_set_structure_channel_positions_list (str, pos, num_positions);
for (++min; min < max; min++) {
str = gst_structure_copy (str);
gst_structure_set (str, "channels", G_TYPE_INT, min, NULL);
gst_audio_set_structure_channel_positions_list (str, pos, num_positions);
gst_caps_append_structure (caps, str);
}
} else {
g_warning ("Unknown value type for channels property");
}
return caps;
}
/**
* gst_audio_set_caps_channel_positions_list:
* @caps: #GstCaps to set the list of channel positions on.
* @pos: the array containing one or more possible audio
* channel positions that we should add in each value
* of the array in the given structure.
* @num_positions: the number of values in pos.
*
* Sets a (possibly non-fixed) list of possible audio channel
* positions (given in pos) on the given caps. Each of the
* structures of the caps, after this function has been called,
* will contain a "channel-positions" property with an array.
* Each value in the array will contain each of the values given
* in the pos array. Note that the size of the caps might be
* increased by this, since each structure with a "channel-
* positions" property needs to have a fixed "channels" property.
* The input caps is not required to have this.
*/
void
gst_audio_set_caps_channel_positions_list (GstCaps * caps,
const GstAudioChannelPosition * pos, gint num_positions)
{
gint size, n;
/* get number of channels, general type checkups */
g_return_if_fail (caps != NULL);
g_return_if_fail (num_positions > 0);
g_return_if_fail (pos != NULL);
size = gst_caps_get_size (caps);
for (n = 0; n < size; n++) {
gst_caps_append (caps, add_list_to_struct (gst_caps_get_structure (caps,
n), pos, num_positions));
}
}
/**
* gst_audio_fixate_channel_positions:
* @str: a #GstStructure containing a (possibly unfixed)
* "channel-positions" property.
*
* Custom fixate function. Elements that implement some sort of
* channel conversion algorhithm should use this function for
* fixating on GstAudioChannelPosition properties. It will take
* care of equal channel positioning (left/right). Caller g_free()s
* the return value. The input properties may be (and are supposed
* to be) unfixed.
* Note that this function is mostly a hack because we currently
* have no way to add default fixation functions for new GTypes.
*
* Returns: fixed values that the caller could use as a fixed
* set of #GstAudioChannelPosition values.
*/
GstAudioChannelPosition *
gst_audio_fixate_channel_positions (GstStructure * str)
{
GstAudioChannelPosition *pos;
gint channels, n, num_unfixed = 0, i, c;
const GValue *pos_val_arr, *pos_val_entry, *pos_val;
gboolean res, is_stereo = TRUE;
GType t;
/*
* We're going to do this cluelessly. We'll make an array of values that
* conflict with each other and, for each iteration in this array, pick
* either one until all unknown values are filled. This might not work in
* corner cases but should work OK for the general case.
*/
struct
{
GstAudioChannelPosition pos1[2];
GstAudioChannelPosition pos2[1];
} conf[] = {
/* front: mono <-> stereo */
{ {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_MONO}},
/* front center: 2 <-> 1 */
{ {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER}},
/* rear: 2 <-> 1 */
{ {
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER}}, { {
GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID}, {
GST_AUDIO_CHANNEL_POSITION_LFE}}, { {
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_INVALID}}, { {
GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID}, {
GST_AUDIO_CHANNEL_POSITION_INVALID}}
};
struct
{
gint num_opt[3];
guint num_opts[3];
gboolean is_fixed[3];
gint choice; /* -1 is none, 0 is the two, 1 is the one */
} opt;
/* get number of channels, general type checkups */
g_return_val_if_fail (str != NULL, NULL);
res = gst_structure_get_int (str, "channels", &channels);
g_return_val_if_fail (res, NULL);
g_return_val_if_fail (channels > 0, NULL);
/* 0.8.x mono/stereo checks */
pos_val_arr = gst_structure_get_value (str,
GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME);
if (!pos_val_arr && (channels == 1 || channels == 2)) {
pos = g_new (GstAudioChannelPosition, channels);
if (channels == 1) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_MONO;
} else {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
return pos;
}
g_return_val_if_fail (pos_val_arr != NULL, NULL);
g_return_val_if_fail (gst_value_list_get_size (pos_val_arr) == channels,
NULL);
for (n = 0; n < channels; n++) {
t = G_VALUE_TYPE (gst_value_list_get_value (pos_val_arr, n));
g_return_val_if_fail (t == GST_TYPE_LIST ||
t == GST_TYPE_AUDIO_CHANNEL_POSITION, NULL);
}
/* all unknown, to start with */
pos = g_new (GstAudioChannelPosition, channels);
for (n = 0; n < channels; n++)
pos[n] = GST_AUDIO_CHANNEL_POSITION_INVALID;
num_unfixed = channels;
/* Iterate the array of conflicting values */
for (i = 0; conf[i].pos1[0] != GST_AUDIO_CHANNEL_POSITION_INVALID ||
conf[i].pos2[0] != GST_AUDIO_CHANNEL_POSITION_INVALID; i++) {
/* front/center only important if not mono (obviously) */
if (conf[i].pos1[0] == GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER &&
!is_stereo)
continue;
/* init values */
for (n = 0; n < 3; n++) {
opt.num_opt[n] = -1;
opt.num_opts[n] = -1;
opt.is_fixed[n] = FALSE;
}
/* Now, we'll see for each channel if it allows for any of the values in
* the set of conflicting audio channel positions and keep scores. */
for (n = 0; n < channels; n++) {
/* if the channel is already taken, don't bother */
if (pos[n] != GST_AUDIO_CHANNEL_POSITION_INVALID)
continue;
pos_val_entry = gst_value_list_get_value (pos_val_arr, n);
t = G_VALUE_TYPE (pos_val_entry);
if (t == GST_TYPE_LIST) {
/* This algorhythm is suboptimal. */
for (c = 0; c < gst_value_list_get_size (pos_val_entry); c++) {
pos_val = gst_value_list_get_value (pos_val_entry, c);
if (g_value_get_enum (pos_val) == conf[i].pos1[0] &&
opt.num_opts[0] > gst_value_list_get_size (pos_val_entry) &&
!opt.is_fixed[0]) {
/* Now test if the old position of num_opt[0] also allows for
* the other channel (which was skipped previously). If so,
* keep score. */
if (opt.num_opt[0] != -1) {
gint c1;
pos_val_entry = gst_value_list_get_value (pos_val_arr,
opt.num_opt[0]);
if (G_VALUE_TYPE (pos_val_entry) == GST_TYPE_LIST) {
for (c1 = 0; c1 < gst_value_list_get_size (pos_val_entry); c1++) {
pos_val = gst_value_list_get_value (pos_val_entry, c1);
if (g_value_get_enum (pos_val) == conf[i].pos1[1] &&
opt.num_opts[1] > opt.num_opts[0] && !opt.is_fixed[1]) {
opt.num_opts[1] = opt.num_opts[0];
opt.num_opt[1] = opt.num_opt[0];
}
}
pos_val = gst_value_list_get_value (pos_val_entry, c);
}
pos_val_entry = gst_value_list_get_value (pos_val_arr, n);
}
/* and save values */
opt.num_opts[0] = gst_value_list_get_size (pos_val_entry);
opt.num_opt[0] = n;
} else if (g_value_get_enum (pos_val) == conf[i].pos1[1] &&
opt.num_opts[1] > gst_value_list_get_size (pos_val_entry) &&
!opt.is_fixed[1] && n != opt.num_opt[0]) {
opt.num_opts[1] = gst_value_list_get_size (pos_val_entry);
opt.num_opt[1] = n;
}
/* 2 goes separately, because 0/1 vs. 2 are separate */
if (g_value_get_enum (pos_val) == conf[i].pos2[0] &&
opt.num_opts[2] > gst_value_list_get_size (pos_val_entry) &&
!opt.is_fixed[2]) {
opt.num_opts[2] = gst_value_list_get_size (pos_val_entry);
opt.num_opt[2] = n;
}
}
} else {
if (g_value_get_enum (pos_val_entry) == conf[i].pos1[0]) {
opt.num_opt[0] = n;
opt.is_fixed[0] = TRUE;
} else if (g_value_get_enum (pos_val_entry) == conf[i].pos1[1]) {
opt.num_opt[1] = n;
opt.is_fixed[1] = TRUE;
} else if (g_value_get_enum (pos_val_entry) == conf[i].pos2[0]) {
opt.num_opt[2] = n;
opt.is_fixed[2] = TRUE;
}
}
}
/* check our results and choose either one */
if ((opt.is_fixed[0] || opt.is_fixed[1]) && opt.is_fixed[2]) {
g_warning ("Pre-fixated on both %d/%d and %d - conflict!",
conf[i].pos1[0], conf[i].pos1[1], conf[i].pos2[0]);
g_free (pos);
return NULL;
} else if ((opt.is_fixed[0] && opt.num_opt[1] == -1) ||
(opt.is_fixed[1] && opt.num_opt[0] == -1)) {
g_warning ("Pre-fixated one side, but other side n/a of %d/%d",
conf[i].pos1[0], conf[i].pos1[1]);
g_free (pos);
return NULL;
} else if (opt.is_fixed[0] || opt.is_fixed[1]) {
opt.choice = 0;
} else if (opt.is_fixed[2]) {
opt.choice = 1;
} else if (opt.num_opt[0] != -1 && opt.num_opt[1] != -1) {
opt.choice = 0;
} else if (opt.num_opt[2] != -1) {
opt.choice = 1;
} else {
opt.choice = -1;
}
/* stereo? Note that we keep is_stereo to TRUE if we didn't decide on
* any arrangement. The mono/stereo channels might be handled elsewhere
* which is clearly outside the scope of this element, so we cannot
* know and expect the application to handle that then. */
if (conf[i].pos2[0] == GST_AUDIO_CHANNEL_POSITION_FRONT_MONO &&
opt.choice == 1) {
is_stereo = FALSE;
}
/* now actually decide what we'll do and fixate on that */
if (opt.choice == 0) {
g_assert (conf[i].pos1[0] != GST_AUDIO_CHANNEL_POSITION_INVALID &&
conf[i].pos1[1] != GST_AUDIO_CHANNEL_POSITION_INVALID);
pos[opt.num_opt[0]] = conf[i].pos1[0];
pos[opt.num_opt[1]] = conf[i].pos1[1];
num_unfixed -= 2;
} else if (opt.choice == 1) {
g_assert (conf[i].pos2[0] != GST_AUDIO_CHANNEL_POSITION_INVALID);
pos[opt.num_opt[2]] = conf[i].pos2[0];
num_unfixed--;
}
}
/* safety check */
if (num_unfixed > 0) {
g_warning ("%d unfixed channel positions left after fixation!",
num_unfixed);
g_free (pos);
return NULL;
}
if (!gst_audio_check_channel_positions (pos, channels)) {
g_free (pos);
return NULL;
}
return pos;
}

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/* GStreamer Multichannel-Audio helper functions
* (c) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_AUDIO_MULTICHANNEL_H__
#define __GST_AUDIO_MULTICHANNEL_H__
#include <gst/audio/audio.h>
#include <gst/audio/multichannel-enumtypes.h>
typedef enum {
GST_AUDIO_CHANNEL_POSITION_INVALID = -1,
/* Main front speakers. Mono and left/right are mututally exclusive! */
GST_AUDIO_CHANNEL_POSITION_FRONT_MONO,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
/* rear. Left/right and center are mututally exclusive! */
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
/* subwoofer/low-frequency */
GST_AUDIO_CHANNEL_POSITION_LFE,
/* Center front speakers. Center and left/right_of_center cannot be
* used together! */
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
/* sides */
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
/* don't use - counter */
GST_AUDIO_CHANNEL_POSITION_NUM
} GstAudioChannelPosition;
/* Retrieves or sets the positions from/to a GstStructure. Only
* works with fixed caps, caller should check for that! Caller
* g_free()s result of the getter. */
GstAudioChannelPosition *
gst_audio_get_channel_positions (GstStructure *str);
void gst_audio_set_channel_positions (GstStructure *str,
const GstAudioChannelPosition *pos);
/* Sets a (non-fixed) list of possible audio channel positions
* on a structure (this requires the "channels" property to
* be fixed!) or on a caps (here, the "channels" property may be
* unfixed and the caps may even contain multiple structures). */
void gst_audio_set_structure_channel_positions_list
(GstStructure *str,
const GstAudioChannelPosition *pos,
gint num_positions);
void gst_audio_set_caps_channel_positions_list
(GstCaps *caps,
const GstAudioChannelPosition *pos,
gint num_positions);
/* Custom fixate function. Elements that implement some sort of
* channel conversion algorhithm should use this function for
* fixating on GstAudioChannelPosition properties. It will take
* care of equal channel positioning (left/right). Caller g_free()s
* the return value. The input properties may be (and are supposed
* to be) unfixed. */
GstAudioChannelPosition *
gst_audio_fixate_channel_positions (GstStructure *str);
#endif /* __GST_AUDIO_MULTICHANNEL_H__ */

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/* GStreamer Multichannel Test
* (c) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/gst.h>
#include <multichannel.c>
#include <multichannel-enumtypes.c>
gint
main (gint argc, gchar * argv[])
{
gchar *str;
GstCaps *caps;
GstAudioChannelPosition pos[2] = { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT
};
/* register multichannel type */
gst_init (&argc, &argv);
gst_audio_channel_position_get_type ();
/* test some caps-string conversions */
caps = gst_caps_new_simple ("audio/x-raw-int",
"channels", G_TYPE_INT, 2, NULL);
str = gst_caps_to_string (caps);
g_print ("Test caps #1: %s\n", str);
g_free (str);
gst_audio_set_channel_positions (gst_caps_get_structure (caps, 0), pos);
str = gst_caps_to_string (caps);
g_print ("Test caps #2: %s\n", str);
g_free (str);
gst_caps_free (caps);
return 0;
}