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Surround sound support.
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:
parent
78cfd8e8af
commit
3a0a2898af
12 changed files with 1184 additions and 30 deletions
34
ChangeLog
34
ChangeLog
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@ -1,3 +1,37 @@
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2004-11-25 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* ext/a52dec/gsta52dec.c: (gst_a52dec_channels), (gst_a52dec_push),
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(gst_a52dec_reneg), (gst_a52dec_loop), (plugin_init):
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* ext/alsa/gstalsa.c: (gst_alsa_get_caps):
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* ext/alsa/gstalsaplugin.c: (plugin_init):
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* ext/dts/gstdtsdec.c: (gst_dtsdec_channels),
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(gst_dtsdec_renegotiate), (gst_dtsdec_loop), (plugin_init):
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* ext/faad/gstfaad.c: (gst_faad_init), (gst_faad_chanpos_from_gst),
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(gst_faad_chanpos_to_gst), (gst_faad_sinkconnect),
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(gst_faad_srcgetcaps), (gst_faad_srcconnect), (gst_faad_chain),
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(gst_faad_change_state), (plugin_init):
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* ext/faad/gstfaad.h:
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* ext/vorbis/vorbis.c: (plugin_init):
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* ext/vorbis/vorbisdec.c: (vorbis_dec_chain):
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* gst-libs/gst/audio/Makefile.am:
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* gst-libs/gst/audio/audio.c: (plugin_init):
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* gst-libs/gst/audio/multichannel.c:
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(gst_audio_check_channel_positions),
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(gst_audio_get_channel_positions),
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(gst_audio_set_channel_positions),
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(gst_audio_set_structure_channel_positions_list),
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(add_list_to_struct), (gst_audio_set_caps_channel_positions_list),
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(gst_audio_fixate_channel_positions):
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* gst-libs/gst/audio/multichannel.h:
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* gst-libs/gst/audio/testchannels.c: (main):
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* gst/audioconvert/gstaudioconvert.c:
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(gst_audio_convert_class_init), (gst_audio_convert_init),
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(gst_audio_convert_dispose), (gst_audio_convert_getcaps),
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(gst_audio_convert_parse_caps), (gst_audio_convert_link),
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(gst_audio_convert_fixate), (gst_audio_convert_channels):
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* gst/audioconvert/plugin.c: (plugin_init):
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Surround sound support.
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2004-11-25 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* ext/ogg/gstoggdemux.c: (gst_ogg_demux_push):
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@ -26,6 +26,7 @@
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#include <sys/time.h>
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#include "gst/gst-i18n-plugin.h"
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#include <gst/audio/multichannel.h>
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#include "gst/propertyprobe/propertyprobe.h"
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#include "gstalsa.h"
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#include "gstalsaclock.h"
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@ -853,14 +854,55 @@ gst_alsa_get_caps (GstPad * pad)
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/* we can never use a format we can't set caps for */
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if (caps != NULL) {
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gint n;
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g_assert (gst_caps_get_size (caps) == 1);
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add_channels (gst_caps_get_structure (caps, 0), min_rate, max_rate,
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min_channels, max_channels);
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if (ret) {
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gst_caps_append (ret, caps);
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} else {
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ret = caps;
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/* channel configuration */
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for (n = min_channels; n < max_channels; n++) {
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if (snd_pcm_hw_params_test_channels (this->handle, hw_params, n) == 0) {
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GstStructure *str;
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GstAudioChannelPosition pos[8] = {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_LFE,
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GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
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GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT
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};
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switch (n) {
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case 1:
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pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_MONO;
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break;
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case 2:
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case 4:
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case 6:
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case 8:
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/* keep above */
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break;
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default:
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/* unsupported */
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pos[0] = GST_AUDIO_CHANNEL_POSITION_INVALID;
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break;
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}
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if (pos[0] != GST_AUDIO_CHANNEL_POSITION_INVALID) {
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str = gst_structure_copy (gst_caps_get_structure (caps, 0));
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gst_structure_set (str, "channels", G_TYPE_INT, n, NULL);
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gst_audio_set_channel_positions (str, pos);
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if (!ret) {
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ret = gst_caps_new_empty ();
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}
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gst_caps_append_structure (ret, str);
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}
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}
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}
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gst_caps_free (caps);
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}
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}
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}
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@ -56,6 +56,9 @@ plugin_init (GstPlugin * plugin)
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{
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int err;
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if (!gst_library_load ("gstaudio"))
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return FALSE;
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if (!gst_element_register (plugin, "alsamixer", GST_RANK_NONE,
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GST_TYPE_ALSA_MIXER))
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return FALSE;
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@ -33,10 +33,8 @@ GST_DEBUG_CATEGORY (vorbisparse_debug);
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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if (!gst_library_load ("gstbytestream"))
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return FALSE;
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if (!gst_library_load ("gsttags"))
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if (!gst_library_load ("gstbytestream") ||
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!gst_library_load ("gstaudio") || !gst_library_load ("gsttags"))
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return FALSE;
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if (!gst_element_register (plugin, "vorbisenc", GST_RANK_NONE,
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@ -24,6 +24,7 @@
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#include "vorbisdec.h"
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#include <string.h>
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#include <gst/tag/tag.h>
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#include <gst/audio/multichannel.h>
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GST_DEBUG_CATEGORY_EXTERN (vorbisdec_debug);
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#define GST_CAT_DEFAULT vorbisdec_debug
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@ -53,7 +54,7 @@ GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw-float, "
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"rate = (int) [ 8000, 50000 ], "
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"channels = (int) [ 1, 2 ], " "endianness = (int) BYTE_ORDER, "
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"channels = (int) [ 1, 6 ], " "endianness = (int) BYTE_ORDER, "
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/* no ifdef in macros, please
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#ifdef GST_VORBIS_DEC_SEQUENTIAL
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"layout = \"sequential\", "
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gst_element_found_tags_for_pad (GST_ELEMENT (vd), vd->srcpad, 0, list);
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} else if (packet.packetno == 2) {
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GstCaps *caps;
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const GstAudioChannelPosition *pos = NULL;
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/* done */
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vorbis_synthesis_init (&vd->vd, &vd->vi);
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"channels", G_TYPE_INT, vd->vi.channels,
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"endianness", G_TYPE_INT, G_BYTE_ORDER,
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"width", G_TYPE_INT, 32, "buffer-frames", G_TYPE_INT, 0, NULL);
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switch (vd->vi.channels) {
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case 1:
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case 2:
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/* nothing */
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break;
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case 3:{
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static GstAudioChannelPosition pos3[] = {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT
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};
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pos = pos3;
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break;
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}
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case 4:{
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static GstAudioChannelPosition pos4[] = {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
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};
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pos = pos4;
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break;
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}
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case 5:{
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static GstAudioChannelPosition pos5[] = {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
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};
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pos = pos5;
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break;
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}
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case 6:{
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static GstAudioChannelPosition pos6[] = {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_LFE
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};
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pos = pos6;
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break;
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}
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default:
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gst_data_unref (data);
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gst_caps_free (caps);
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GST_ELEMENT_ERROR (vd, STREAM, NOT_IMPLEMENTED, (NULL),
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("Unsupported channel count %d", vd->vi.channels));
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return;
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}
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if (pos) {
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gst_audio_set_channel_positions (gst_caps_get_structure (caps, 0), pos);
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}
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if (!gst_pad_set_explicit_caps (vd->srcpad, caps)) {
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gst_caps_free (caps);
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return;
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@ -1,15 +1,32 @@
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# variables used for enum/marshal generation
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glib_enum_headers=multichannel.h
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glib_enum_define=GST_AUDIO
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glib_enum_prefix=gst_audio
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built_sources = multichannel-enumtypes.c
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built_headers = multichannel-enumtypes.h
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BUILT_SOURCES = $(built_sources) $(built_headers)
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librarydir = $(libdir)/gstreamer-@GST_MAJORMINOR@
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library_LTLIBRARIES = libgstaudio.la libgstaudiofilter.la
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noinst_LTLIBRARIES = libgstaudiofilterexample.la
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EXTRA_DIST = gstaudiofiltertemplate.c make_filter
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CLEANFILES = gstaudiofilterexample.c
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CLEANFILES = gstaudiofilterexample.c \
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$(BUILT_SOURCES)
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libgstaudio_la_SOURCES = audio.c audioclock.c
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libgstaudio_la_SOURCES = audio.c audioclock.c \
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multichannel.c
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nodist_libgstaudio_la_SOURCES = $(built_sources)
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libgstaudioincludedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/audio
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libgstaudioinclude_HEADERS = audio.h audioclock.h gstaudiofilter.h
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libgstaudioinclude_HEADERS = \
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audio.h \
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audioclock.h \
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gstaudiofilter.h \
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multichannel.h \
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multichannel-enumtypes.h
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libgstaudio_la_LIBADD =
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libgstaudio_la_CFLAGS = $(GST_CFLAGS)
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@ -25,3 +42,10 @@ libgstaudiofilterexample_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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gstaudiofilterexample.c: $(srcdir)/make_filter $(srcdir)/gstaudiofiltertemplate.c
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$(srcdir)/make_filter AudiofilterExample $(srcdir)/gstaudiofiltertemplate.c
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noinst_PROGRAMS = testchannels
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testchannels_SOURCES = testchannels.c
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testchannels_CFLAGS = $(GST_CFLAGS)
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testchannels_LDFLAGS = $(GST_LIBS)
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include $(top_srcdir)/common/glib-gen.mak
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@ -22,6 +22,7 @@
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#endif
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#include "audio.h"
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#include "multichannel-enumtypes.h"
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#include <gst/gststructure.h>
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@ -267,6 +268,8 @@ gst_audio_structure_set_int (GstStructure * structure, GstAudioFieldFlag flag)
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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gst_audio_channel_position_get_type ();
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return TRUE;
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}
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634
gst-libs/gst/audio/multichannel.c
Normal file
634
gst-libs/gst/audio/multichannel.c
Normal file
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@ -0,0 +1,634 @@
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/* GStreamer Multichannel-Audio helper functions
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* (c) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "multichannel.h"
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#define GST_AUDIO_CHANNEL_POSITIONS_PROPERTY_NAME "channel-positions"
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/*
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* This function checks if basic assumptions apply:
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* - does each position occur at most once?
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* - do conflicting positions occur?
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* + front_mono vs. front_left/right
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* + front_center vs. front_left/right_of_center
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* + rear_center vs. rear_left/right
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* It also adds some hacks that 0.8.x needs for compatibility:
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* - if channels == 1, are we really mono?
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* - if channels == 2, are we really stereo?
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*/
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static gboolean
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gst_audio_check_channel_positions (const GstAudioChannelPosition * pos,
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gint channels)
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{
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gint i, n;
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struct
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{
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GstAudioChannelPosition pos1[2];
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GstAudioChannelPosition pos2[1];
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} conf[] = {
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/* front: mono <-> stereo */
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{ {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, {
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GST_AUDIO_CHANNEL_POSITION_FRONT_MONO}},
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/* front center: 2 <-> 1 */
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{ {
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER}, {
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER}},
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/* rear: 2 <-> 1 */
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{ {
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {
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GST_AUDIO_CHANNEL_POSITION_REAR_CENTER}}, { {
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GST_AUDIO_CHANNEL_POSITION_INVALID}}
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};
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/* check for invalid channel positions */
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for (n = 0; n < channels; n++) {
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if (pos[n] == GST_AUDIO_CHANNEL_POSITION_INVALID) {
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g_warning ("Position %d is invalid, not allowed", n);
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return FALSE;
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}
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}
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/* check for multiple position occurrences */
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for (i = GST_AUDIO_CHANNEL_POSITION_INVALID + 1;
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i < GST_AUDIO_CHANNEL_POSITION_NUM; i++) {
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gint count = 0;
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for (n = 0; n < channels; n++) {
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if (pos[n] == i)
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count++;
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}
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if (count > 1) {
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g_warning ("Channel position %d occurred %d times, not allowed",
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i, count);
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return FALSE;
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}
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}
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/* check for position conflicts */
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for (i = 0; conf[i].pos1[0] != GST_AUDIO_CHANNEL_POSITION_INVALID; i++) {
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gboolean found1 = FALSE, found2 = FALSE;
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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;
|
||||
}
|
86
gst-libs/gst/audio/multichannel.h
Normal file
86
gst-libs/gst/audio/multichannel.h
Normal file
|
@ -0,0 +1,86 @@
|
|||
/* 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__ */
|
55
gst-libs/gst/audio/testchannels.c
Normal file
55
gst-libs/gst/audio/testchannels.c
Normal file
|
@ -0,0 +1,55 @@
|
|||
/* 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;
|
||||
}
|
|
@ -37,6 +37,7 @@
|
|||
#endif
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <gst/audio/multichannel.h>
|
||||
#include <string.h>
|
||||
#include "plugin.h"
|
||||
|
||||
|
@ -64,6 +65,7 @@ struct _GstAudioConvertCaps
|
|||
gint width;
|
||||
gint rate;
|
||||
gint channels;
|
||||
GstAudioChannelPosition *pos;
|
||||
|
||||
/* int audio caps */
|
||||
gboolean sign;
|
||||
|
@ -104,6 +106,7 @@ static GstElementDetails audio_convert_details = {
|
|||
static void gst_audio_convert_base_init (gpointer g_class);
|
||||
static void gst_audio_convert_class_init (GstAudioConvertClass * klass);
|
||||
static void gst_audio_convert_init (GstAudioConvert * audio_convert);
|
||||
static void gst_audio_convert_dispose (GObject * obj);
|
||||
|
||||
/* gstreamer functions */
|
||||
static void gst_audio_convert_chain (GstPad * pad, GstData * _data);
|
||||
|
@ -147,33 +150,35 @@ GST_BOILERPLATE_FULL (GstAudioConvert, gst_audio_convert, GstElement,
|
|||
GST_STATIC_CAPS ( \
|
||||
"audio/x-raw-int, " \
|
||||
"rate = (int) [ 1, MAX ], " \
|
||||
"channels = (int) [ 1, 2 ], " \
|
||||
"channels = (int) [ 1, 8 ], " \
|
||||
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \
|
||||
"width = (int) 8, " \
|
||||
"depth = (int) [ 1, 8 ], " \
|
||||
"signed = (boolean) { true, false }; " \
|
||||
"audio/x-raw-int, " \
|
||||
"rate = (int) [ 1, MAX ], " \
|
||||
"channels = (int) [ 1, 2 ], " \
|
||||
"channels = (int) [ 1, 8 ], " \
|
||||
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \
|
||||
"width = (int) 16, " \
|
||||
"depth = (int) [ 1, 16 ], " \
|
||||
"signed = (boolean) { true, false }; " \
|
||||
"audio/x-raw-int, " \
|
||||
"rate = (int) [ 1, MAX ], " \
|
||||
"channels = (int) [ 1, 2 ], " \
|
||||
"channels = (int) [ 1, 8 ], " \
|
||||
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \
|
||||
"width = (int) 32, " \
|
||||
"depth = (int) [ 1, 32 ], " \
|
||||
"signed = (boolean) { true, false }; " \
|
||||
"audio/x-raw-float, " \
|
||||
"rate = (int) [ 1, MAX ], " \
|
||||
"channels = (int) [ 1, 2 ], " \
|
||||
"channels = (int) [ 1, 8 ], " \
|
||||
"endianness = (int) BYTE_ORDER, " \
|
||||
"width = (int) 32, " \
|
||||
"buffer-frames = (int) [ 0, MAX ]" \
|
||||
)
|
||||
|
||||
static GstAudioChannelPosition *supported_positions;
|
||||
|
||||
static GstStaticPadTemplate gst_audio_convert_src_template =
|
||||
GST_STATIC_PAD_TEMPLATE ("src",
|
||||
GST_PAD_SRC,
|
||||
|
@ -204,8 +209,16 @@ static void
|
|||
gst_audio_convert_class_init (GstAudioConvertClass * klass)
|
||||
{
|
||||
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||||
gint i;
|
||||
|
||||
gstelement_class->change_state = gst_audio_convert_change_state;
|
||||
gobject_class->dispose = gst_audio_convert_dispose;
|
||||
|
||||
supported_positions = g_new0 (GstAudioChannelPosition,
|
||||
GST_AUDIO_CHANNEL_POSITION_NUM);
|
||||
for (i = 0; i < GST_AUDIO_CHANNEL_POSITION_NUM; i++)
|
||||
supported_positions[i] = i;
|
||||
}
|
||||
|
||||
static void
|
||||
|
@ -233,6 +246,24 @@ gst_audio_convert_init (GstAudioConvert * this)
|
|||
|
||||
/* clear important variables */
|
||||
this->convert_internal = NULL;
|
||||
this->sinkcaps.pos = NULL;
|
||||
this->srccaps.pos = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_audio_convert_dispose (GObject * obj)
|
||||
{
|
||||
GstAudioConvert *this = GST_AUDIO_CONVERT (obj);
|
||||
|
||||
if (this->sinkcaps.pos) {
|
||||
g_free (this->sinkcaps.pos);
|
||||
this->sinkcaps.pos = NULL;
|
||||
}
|
||||
|
||||
if (this->srccaps.pos) {
|
||||
g_free (this->srccaps.pos);
|
||||
this->srccaps.pos = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/*** GSTREAMER FUNCTIONS ******************************************************/
|
||||
|
@ -310,6 +341,7 @@ gst_audio_convert_getcaps (GstPad * pad)
|
|||
for (i = size - 1; i >= 0; i--) {
|
||||
structure = gst_caps_get_structure (othercaps, i);
|
||||
gst_structure_remove_field (structure, "channels");
|
||||
gst_structure_remove_field (structure, "channel-positions");
|
||||
gst_structure_remove_field (structure, "endianness");
|
||||
gst_structure_remove_field (structure, "width");
|
||||
gst_structure_remove_field (structure, "depth");
|
||||
|
@ -332,6 +364,10 @@ gst_audio_convert_getcaps (GstPad * pad)
|
|||
caps = gst_caps_intersect (othercaps, templcaps);
|
||||
gst_caps_free (othercaps);
|
||||
|
||||
/* Get the channel positions in as well. */
|
||||
gst_audio_set_caps_channel_positions_list (caps, supported_positions,
|
||||
GST_AUDIO_CHANNEL_POSITION_NUM);
|
||||
|
||||
return caps;
|
||||
}
|
||||
|
||||
|
@ -344,10 +380,17 @@ gst_audio_convert_parse_caps (const GstCaps * gst_caps,
|
|||
g_return_val_if_fail (gst_caps_is_fixed (gst_caps), FALSE);
|
||||
g_return_val_if_fail (caps != NULL, FALSE);
|
||||
|
||||
/* cleanup old */
|
||||
if (caps->pos) {
|
||||
g_free (caps->pos);
|
||||
caps->pos = NULL;
|
||||
}
|
||||
|
||||
caps->endianness = G_BYTE_ORDER;
|
||||
caps->is_int =
|
||||
(strcmp (gst_structure_get_name (structure), "audio/x-raw-int") == 0);
|
||||
if (!gst_structure_get_int (structure, "channels", &caps->channels)
|
||||
|| !(caps->pos = gst_audio_get_channel_positions (structure))
|
||||
|| !gst_structure_get_int (structure, "width", &caps->width)
|
||||
|| !gst_structure_get_int (structure, "rate", &caps->rate)
|
||||
|| (caps->is_int
|
||||
|
@ -359,10 +402,14 @@ gst_audio_convert_parse_caps (const GstCaps * gst_caps,
|
|||
&& !gst_structure_get_int (structure, "buffer-frames",
|
||||
&caps->buffer_frames))) {
|
||||
GST_DEBUG ("could not get some values from structure");
|
||||
g_free (caps->pos);
|
||||
caps->pos = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
if (caps->is_int && caps->depth > caps->width) {
|
||||
GST_DEBUG ("width > depth, not allowed - make us advertise correct caps");
|
||||
g_free (caps->pos);
|
||||
caps->pos = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
return TRUE;
|
||||
|
@ -386,6 +433,7 @@ gst_audio_convert_link (GstPad * pad, const GstCaps * caps)
|
|||
this = GST_AUDIO_CONVERT (GST_OBJECT_PARENT (pad));
|
||||
otherpad = (pad == this->src ? this->sink : this->src);
|
||||
|
||||
ac_caps.pos = NULL;
|
||||
if (!gst_audio_convert_parse_caps (caps, &ac_caps))
|
||||
return GST_PAD_LINK_REFUSED;
|
||||
|
||||
|
@ -406,11 +454,14 @@ gst_audio_convert_link (GstPad * pad, const GstCaps * caps)
|
|||
}
|
||||
}
|
||||
if (this->sink == pad) {
|
||||
g_free (this->sinkcaps.pos);
|
||||
this->sinkcaps = ac_caps;
|
||||
} else {
|
||||
g_free (this->srccaps.pos);
|
||||
this->srccaps = ac_caps;
|
||||
}
|
||||
GST_LOG_OBJECT (this, "trying to set caps to %" GST_PTR_FORMAT, othercaps);
|
||||
|
||||
ret = gst_pad_try_set_caps_nonfixed (otherpad, othercaps);
|
||||
gst_caps_free (othercaps);
|
||||
if (ret < GST_PAD_LINK_OK)
|
||||
|
@ -419,18 +470,24 @@ gst_audio_convert_link (GstPad * pad, const GstCaps * caps)
|
|||
/* woohoo, got it */
|
||||
othercaps = (GstCaps *) gst_pad_get_negotiated_caps (otherpad);
|
||||
if (othercaps) {
|
||||
other_ac_caps.pos = NULL;
|
||||
|
||||
if (!gst_audio_convert_parse_caps (othercaps, &other_ac_caps)) {
|
||||
g_critical ("internal negotiation error");
|
||||
return GST_PAD_LINK_REFUSED;
|
||||
}
|
||||
} else {
|
||||
other_ac_caps = ac_caps;
|
||||
other_ac_caps.pos = g_memdup (ac_caps.pos,
|
||||
ac_caps.channels * sizeof (GstAudioChannelPosition));
|
||||
}
|
||||
|
||||
if (this->sink == pad) {
|
||||
g_free (this->srccaps.pos);
|
||||
this->srccaps = other_ac_caps;
|
||||
this->sinkcaps = ac_caps;
|
||||
} else {
|
||||
g_free (this->sinkcaps.pos);
|
||||
this->srccaps = ac_caps;
|
||||
this->sinkcaps = other_ac_caps;
|
||||
}
|
||||
|
@ -489,6 +546,7 @@ _fixate_caps_to_int (GstCaps ** caps, const gchar * field, gint value)
|
|||
static GstCaps *
|
||||
gst_audio_convert_fixate (GstPad * pad, const GstCaps * caps)
|
||||
{
|
||||
const GValue *pos_val;
|
||||
GstAudioConvert *this =
|
||||
GST_AUDIO_CONVERT (gst_object_get_parent (GST_OBJECT (pad)));
|
||||
GstPad *otherpad = (pad == this->sink ? this->src : this->sink);
|
||||
|
@ -508,15 +566,63 @@ gst_audio_convert_fixate (GstPad * pad, const GstCaps * caps)
|
|||
try.endianness = ac_caps.is_int ? ac_caps.endianness : G_BYTE_ORDER;
|
||||
}
|
||||
|
||||
if (_fixate_caps_to_int (©, "channels", try.channels))
|
||||
if (_fixate_caps_to_int (©, "channels", try.channels)) {
|
||||
int n;
|
||||
|
||||
if (try.channels > 2) {
|
||||
/* make sure we have a channelpositions structure or array here */
|
||||
GstStructure *str;
|
||||
|
||||
for (n = 0; n < gst_caps_get_size (copy); n++) {
|
||||
str = gst_caps_get_structure (copy, n);
|
||||
if (!gst_structure_get_value (str, "channel-positions")) {
|
||||
/* first try otherpad's positions, else anything */
|
||||
if (ac_caps.pos != NULL) {
|
||||
gst_audio_set_channel_positions (str, ac_caps.pos);
|
||||
} else {
|
||||
gst_audio_set_structure_channel_positions_list (str,
|
||||
supported_positions, GST_AUDIO_CHANNEL_POSITION_NUM);
|
||||
/* FIXME: fixate (else we'll be less fixed than we used to) */
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* make sure we don't */
|
||||
for (n = 0; n < gst_caps_get_size (copy); n++) {
|
||||
gst_structure_remove_field (gst_caps_get_structure (copy, n),
|
||||
"channel-positions");
|
||||
}
|
||||
}
|
||||
return copy;
|
||||
}
|
||||
if (_fixate_caps_to_int (©, "width", try.width))
|
||||
return copy;
|
||||
if (_fixate_caps_to_int (©, "depth", try.depth))
|
||||
return copy;
|
||||
if (_fixate_caps_to_int (©, "endianness", try.endianness))
|
||||
return copy;
|
||||
if ((pos_val = gst_structure_get_value (gst_caps_get_structure (copy, 0),
|
||||
"channel-positions")) != NULL) {
|
||||
GstAudioChannelPosition *pos;
|
||||
const GValue *pos_val_entry;
|
||||
gint i;
|
||||
|
||||
for (i = 0; i < gst_value_list_get_size (pos_val); i++) {
|
||||
pos_val_entry = gst_value_list_get_value (pos_val, i);
|
||||
if (G_VALUE_TYPE (pos_val_entry) == GST_TYPE_LIST) {
|
||||
/* unfixed */
|
||||
pos =
|
||||
gst_audio_fixate_channel_positions (gst_caps_get_structure (copy,
|
||||
0));
|
||||
if (pos) {
|
||||
gst_audio_set_channel_positions (gst_caps_get_structure (copy, 0),
|
||||
pos);
|
||||
g_free (pos);
|
||||
return copy;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
gst_caps_free (copy);
|
||||
return NULL;
|
||||
|
@ -786,28 +892,135 @@ static GstBuffer *
|
|||
gst_audio_convert_channels (GstAudioConvert * this, GstBuffer * buf)
|
||||
{
|
||||
GstBuffer *ret;
|
||||
gint i, count;
|
||||
gint c, i, count, ci, co;
|
||||
gint32 *src, *dest;
|
||||
|
||||
if (this->sinkcaps.channels == this->srccaps.channels)
|
||||
/* Conversions from one-channel to compatible two-channel configs */
|
||||
struct
|
||||
{
|
||||
GstAudioChannelPosition pos1[2];
|
||||
GstAudioChannelPosition pos2[1];
|
||||
} conv[] = {
|
||||
/* 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}}
|
||||
};
|
||||
gboolean set[8] = { FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE };
|
||||
|
||||
if (this->sinkcaps.channels == this->srccaps.channels) {
|
||||
for (i = 0; i < this->sinkcaps.channels; i++) {
|
||||
if (this->sinkcaps.pos[i] != this->srccaps.pos[i])
|
||||
break;
|
||||
}
|
||||
if (i == this->sinkcaps.channels)
|
||||
return buf;
|
||||
}
|
||||
|
||||
count = GST_BUFFER_SIZE (buf) / 4 / this->sinkcaps.channels;
|
||||
ret = gst_audio_convert_get_buffer (buf, count * 4 * this->srccaps.channels);
|
||||
|
||||
/* conversions from compatible (but not the same) channel schemes. This
|
||||
* goes two ways: if the sink has both pos1[0,1] and src has pos2[0] or
|
||||
* if the src has both pos1[0,1] and sink has pos2[0], then we do the
|
||||
* conversion. We hereby assume that the existance of pos1[0,1] and
|
||||
* pos2[0] are mututally exclusive. There are no checks for that,
|
||||
* unfortunately. This shouldn't lead to issues (like crashes or so),
|
||||
* though. */
|
||||
for (c = 0; conv[c].pos1[0] != GST_AUDIO_CHANNEL_POSITION_INVALID; c++) {
|
||||
gint pos1_0 = -1, pos1_1 = -1, pos2_0 = -1, n;
|
||||
|
||||
/* Try to go from the given 2 channels to the given 1 channel */
|
||||
for (n = 0; n < this->sinkcaps.channels; n++) {
|
||||
if (this->sinkcaps.pos[n] == conv[c].pos1[0])
|
||||
pos1_0 = n;
|
||||
else if (this->sinkcaps.pos[n] == conv[c].pos1[1])
|
||||
pos1_1 = n;
|
||||
}
|
||||
for (n = 0; n < this->srccaps.channels; n++) {
|
||||
if (this->srccaps.pos[n] == conv[c].pos2[0])
|
||||
pos2_0 = n;
|
||||
}
|
||||
|
||||
if (pos1_0 != -1 && pos1_1 != -1 && pos2_0 != -1) {
|
||||
src = (gint32 *) GST_BUFFER_DATA (buf);
|
||||
dest = (gint32 *) GST_BUFFER_DATA (ret);
|
||||
|
||||
if (this->sinkcaps.channels > this->srccaps.channels) {
|
||||
for (i = 0; i < count; i++) {
|
||||
*dest = *src >> 1;
|
||||
src++;
|
||||
*dest += (*src >> 1) + (*src & 1);
|
||||
src++;
|
||||
dest++;
|
||||
dest[pos2_0] = (src[pos1_0] >> 1) + (src[pos1_1] >> 1) +
|
||||
((src[pos1_0] & 1) & (src[pos1_1] & 1));
|
||||
src += this->sinkcaps.channels;
|
||||
dest += this->srccaps.channels;
|
||||
}
|
||||
set[pos2_0] = TRUE;
|
||||
}
|
||||
|
||||
/* Try to go from the given 1 channel to the given 2 channels */
|
||||
pos1_0 = -1;
|
||||
pos1_1 = -1;
|
||||
pos2_0 = -1;
|
||||
|
||||
for (n = 0; n < this->srccaps.channels; n++) {
|
||||
if (this->srccaps.pos[n] == conv[c].pos1[0])
|
||||
pos1_0 = n;
|
||||
else if (this->srccaps.pos[n] == conv[c].pos1[1])
|
||||
pos1_1 = n;
|
||||
}
|
||||
for (n = 0; n < this->sinkcaps.channels; n++) {
|
||||
if (this->sinkcaps.pos[n] == conv[c].pos2[0])
|
||||
pos2_0 = n;
|
||||
}
|
||||
|
||||
if (pos1_0 != -1 && pos1_1 != -1 && pos2_0 != -1) {
|
||||
src = (gint32 *) GST_BUFFER_DATA (buf);
|
||||
dest = (gint32 *) GST_BUFFER_DATA (ret);
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
dest[pos1_0] = dest[pos1_1] = src[pos2_0];
|
||||
src += this->sinkcaps.channels;
|
||||
dest += this->srccaps.channels;
|
||||
}
|
||||
set[pos1_0] = set[pos1_1] = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
/* reset data pointers */
|
||||
src = (gint32 *) GST_BUFFER_DATA (buf);
|
||||
dest = (gint32 *) GST_BUFFER_DATA (ret);
|
||||
|
||||
/* Apart from the compatible channel assignments, we can also have
|
||||
* same channel assignments. This is much simpler, we simply copy
|
||||
* the value from source to dest! */
|
||||
for (co = 0; co < this->srccaps.channels; co++) {
|
||||
/* find a channel in input with same position */
|
||||
for (ci = 0; ci < this->sinkcaps.channels; ci++) {
|
||||
if (this->sinkcaps.pos[ci] == this->srccaps.pos[co]) {
|
||||
for (i = 0; i < count; i++) {
|
||||
dest[i * this->srccaps.channels + co] =
|
||||
src[i * this->sinkcaps.channels + ci];
|
||||
}
|
||||
set[co] = TRUE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* if not found, then silence */
|
||||
if (ci == this->sinkcaps.channels && !set[co]) {
|
||||
for (i = 0; i < count; i++) {
|
||||
dest[i * this->srccaps.channels + co] = 0;
|
||||
}
|
||||
} else {
|
||||
for (i = count - 1; i >= 0; i--) {
|
||||
dest[2 * i] = dest[2 * i + 1] = src[i];
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
@ -28,6 +28,9 @@
|
|||
static gboolean
|
||||
plugin_init (GstPlugin * plugin)
|
||||
{
|
||||
if (!gst_library_load ("gstaudio"))
|
||||
return FALSE;
|
||||
|
||||
if (!gst_element_register (plugin, "audioconvert",
|
||||
GST_RANK_PRIMARY, gst_audio_convert_get_type ()) ||
|
||||
!gst_element_register (plugin, "buffer-frames-convert",
|
||||
|
|
Loading…
Reference in a new issue