gstreamer/sys/directsound/gstdirectsoundsink.c

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/* GStreamer
* Copyright (C) 2005 Sebastien Moutte <sebastien@moutte.net>
*
* gstdirectsoundsink.c:
*
* 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 "gstdirectsoundsink.h"
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (directsoundsink_debug);
#define GST_CAT_DEFAULT directsoundsink_debug
/* elementfactory information */
Define GstElementDetails as const and also static (when defined as global) Original commit message from CVS: * ext/amrwb/gstamrwbdec.c: * ext/amrwb/gstamrwbenc.c: * ext/amrwb/gstamrwbparse.c: * ext/arts/gst_arts.c: * ext/artsd/gstartsdsink.c: * ext/audiofile/gstafparse.c: * ext/audiofile/gstafsink.c: * ext/audiofile/gstafsrc.c: * ext/audioresample/gstaudioresample.c: * ext/bz2/gstbz2dec.c: * ext/bz2/gstbz2enc.c: * ext/cdaudio/gstcdaudio.c: * ext/directfb/dfbvideosink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/dts/gstdtsdec.c: (gst_dtsdec_base_init): * ext/faac/gstfaac.c: (gst_faac_base_init): * ext/faad/gstfaad.c: * ext/gsm/gstgsmdec.c: * ext/gsm/gstgsmenc.c: * ext/hermes/gsthermescolorspace.c: * ext/ivorbis/vorbisfile.c: * ext/lcs/gstcolorspace.c: * ext/libfame/gstlibfame.c: * ext/libmms/gstmms.c: (gst_mms_base_init): * ext/musepack/gstmusepackdec.c: (gst_musepackdec_base_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init): * ext/nas/nassink.c: (gst_nassink_base_init): * ext/neon/gstneonhttpsrc.c: * ext/sdl/sdlaudiosink.c: * ext/sdl/sdlvideosink.c: * ext/shout/gstshout.c: * ext/snapshot/gstsnapshot.c: * ext/sndfile/gstsf.c: * ext/swfdec/gstswfdec.c: * ext/tarkin/gsttarkindec.c: * ext/tarkin/gsttarkinenc.c: * ext/theora/theoradec.c: * ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_base_init): * ext/wavpack/gstwavpackparse.c: (gst_wavpack_parse_base_init): * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/cdxaparse/gstcdxaparse.c: (gst_cdxa_parse_base_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_base_init): * gst/chart/gstchart.c: * gst/colorspace/gstcolorspace.c: * gst/deinterlace/gstdeinterlace.c: * gst/equalizer/gstiirequalizer.c: (gst_iir_equalizer_base_init): * gst/festival/gstfestival.c: * gst/filter/gstbpwsinc.c: * gst/filter/gstiir.c: * gst/filter/gstlpwsinc.c: * gst/freeze/gstfreeze.c: * gst/games/gstpuzzle.c: (gst_puzzle_base_init): * gst/librfb/gstrfbsrc.c: * gst/mixmatrix/mixmatrix.c: * gst/mpeg1sys/gstmpeg1systemencode.c: * gst/mpeg1videoparse/gstmp1videoparse.c: * gst/mpeg2sub/gstmpeg2subt.c: * gst/mpegaudioparse/gstmpegaudioparse.c: * gst/multifilesink/gstmultifilesink.c: * gst/overlay/gstoverlay.c: * gst/passthrough/gstpassthrough.c: * gst/playondemand/gstplayondemand.c: * gst/qtdemux/qtdemux.c: * gst/rtjpeg/gstrtjpegdec.c: * gst/rtjpeg/gstrtjpegenc.c: * gst/smooth/gstsmooth.c: * gst/smoothwave/gstsmoothwave.c: * gst/spectrum/gstspectrum.c: * gst/speed/gstspeed.c: * gst/stereo/gststereo.c: * gst/switch/gstswitch.c: * gst/tta/gstttadec.c: (gst_tta_dec_base_init): * gst/tta/gstttaparse.c: (gst_tta_parse_base_init): * gst/vbidec/gstvbidec.c: * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/virtualdub/gstxsharpen.c: * gst/xingheader/gstxingmux.c: (gst_xing_mux_base_init): * gst/y4m/gsty4mencode.c: * sys/cdrom/gstcdplayer.c: * sys/directdraw/gstdirectdrawsink.c: * sys/directsound/gstdirectsoundsink.c: * sys/glsink/glimagesink.c: * sys/qcam/gstqcamsrc.c: * sys/v4l2/gstv4l2src.c: * sys/vcd/vcdsrc.c: (gst_vcdsrc_base_init): * sys/ximagesrc/ximagesrc.c: Define GstElementDetails as const and also static (when defined as global)
2006-04-25 21:56:38 +00:00
static const GstElementDetails gst_directsoundsink_details =
GST_ELEMENT_DETAILS ("Audio Sink (DIRECTSOUND)",
"Sink/Audio",
"Output to a sound card via DIRECTSOUND",
"Sebastien Moutte <sebastien@moutte.net>");
static void gst_directsoundsink_base_init (gpointer g_class);
static void gst_directsoundsink_class_init (GstDirectSoundSinkClass * klass);
static void gst_directsoundsink_init (GstDirectSoundSink * alsasink);
static void gst_directsoundsink_dispose (GObject * object);
static void gst_directsoundsink_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_directsoundsink_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstCaps *gst_directsoundsink_getcaps (GstBaseSink * bsink);
static gboolean gst_directsoundsink_prepare (GstAudioSink * asink,
GstRingBufferSpec * spec);
static gboolean gst_directsoundsink_unprepare (GstAudioSink * asink);
static gboolean gst_directsoundsink_open (GstAudioSink * asink);
static gboolean gst_directsoundsink_close (GstAudioSink * asink);
static guint gst_directsoundsink_write (GstAudioSink * asink, gpointer data,
guint length);
static guint gst_directsoundsink_delay (GstAudioSink * asink);
static void gst_directsoundsink_reset (GstAudioSink * asink);
static GstStaticPadTemplate directsoundsink_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
"signed = (boolean) { TRUE, FALSE }, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; "
"audio/x-raw-int, "
"signed = (boolean) { TRUE, FALSE }, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]"));
static void
_do_init (GType directsoundsink_type)
{
GST_DEBUG_CATEGORY_INIT (directsoundsink_debug, "directsoundsink", 0,
"DirectSound sink");
}
GST_BOILERPLATE_FULL (GstDirectSoundSink, gst_directsoundsink, GstAudioSink,
GST_TYPE_AUDIO_SINK, _do_init);
static void
gst_directsoundsink_dispose (GObject * object)
{
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_directsoundsink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_directsoundsink_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&directsoundsink_sink_factory));
}
static void
gst_directsoundsink_class_init (GstDirectSoundSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstBaseAudioSinkClass *gstbaseaudiosink_class;
GstAudioSinkClass *gstaudiosink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
gstaudiosink_class = (GstAudioSinkClass *) klass;
Fix #337365 (g_type_class_ref <-> g_type_class_peek_parent) Original commit message from CVS: * ext/amrwb/gstamrwbdec.c: (gst_amrwbdec_class_init): * ext/amrwb/gstamrwbenc.c: (gst_amrwbenc_class_init): * ext/amrwb/gstamrwbparse.c: (gst_amrwbparse_class_init): * ext/arts/gst_arts.c: (gst_arts_class_init): * ext/artsd/gstartsdsink.c: (gst_artsdsink_class_init): * ext/audiofile/gstafsink.c: (gst_afsink_class_init): * ext/audiofile/gstafsrc.c: (gst_afsrc_class_init): * ext/audioresample/gstaudioresample.c: * ext/cdaudio/gstcdaudio.c: (gst_cdaudio_class_init): * ext/directfb/dfbvideosink.c: (gst_dfbvideosink_class_init): * ext/divx/gstdivxdec.c: (gst_divxdec_class_init): * ext/hermes/gsthermescolorspace.c: (gst_hermes_colorspace_class_init): * ext/ivorbis/vorbisfile.c: (gst_ivorbisfile_class_init): * ext/jack/gstjack.c: (gst_jack_class_init): * ext/jack/gstjackbin.c: (gst_jack_bin_class_init): * ext/lcs/gstcolorspace.c: (gst_colorspace_class_init): * ext/libfame/gstlibfame.c: (gst_fameenc_class_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_class_init): * ext/nas/nassink.c: (gst_nassink_class_init): * ext/shout/gstshout.c: (gst_icecastsend_class_init): * ext/snapshot/gstsnapshot.c: (gst_snapshot_class_init): * ext/sndfile/gstsf.c: (gst_sf_class_init): * ext/swfdec/gstswfdec.c: (gst_swfdecbuffer_class_init), (gst_swfdec_class_init): * ext/tarkin/gsttarkindec.c: (gst_tarkindec_class_init): * ext/tarkin/gsttarkinenc.c: (gst_tarkinenc_class_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_class_init): * gst/chart/gstchart.c: (gst_chart_class_init): * gst/colorspace/gstcolorspace.c: (gst_colorspace_class_init): * gst/deinterlace/gstdeinterlace.c: (gst_deinterlace_class_init): * gst/festival/gstfestival.c: (gst_festival_class_init): * gst/filter/gstbpwsinc.c: (gst_bpwsinc_class_init): * gst/filter/gstiir.c: (gst_iir_class_init): * gst/filter/gstlpwsinc.c: (gst_lpwsinc_class_init): * gst/librfb/gstrfbsrc.c: (gst_rfbsrc_class_init): * gst/mixmatrix/mixmatrix.c: (gst_mixmatrix_class_init): * gst/mpeg1sys/gstmpeg1systemencode.c: (gst_system_encode_class_init): * gst/mpeg1videoparse/gstmp1videoparse.c: (gst_mp1videoparse_class_init): * gst/mpeg2sub/gstmpeg2subt.c: (gst_mpeg2subt_class_init): * gst/mpegaudioparse/gstmpegaudioparse.c: (gst_mp3parse_class_init): * gst/overlay/gstoverlay.c: (gst_overlay_class_init): * gst/passthrough/gstpassthrough.c: (passthrough_class_init): * gst/playondemand/gstplayondemand.c: (play_on_demand_class_init): * gst/rtjpeg/gstrtjpegdec.c: (gst_rtjpegdec_class_init): * gst/rtjpeg/gstrtjpegenc.c: (gst_rtjpegenc_class_init): * gst/smooth/gstsmooth.c: (gst_smooth_class_init): * gst/smoothwave/gstsmoothwave.c: (gst_smoothwave_class_init): * gst/spectrum/gstspectrum.c: (gst_spectrum_class_init): * gst/stereo/gststereo.c: (gst_stereo_class_init): * gst/switch/gstswitch.c: (gst_switch_class_init): * gst/tta/gstttadec.c: (gst_tta_dec_class_init): * gst/tta/gstttaparse.c: (gst_tta_parse_class_init): * gst/vbidec/gstvbidec.c: (gst_vbidec_class_init): * gst/videocrop/gstvideocrop.c: (gst_video_crop_class_init): * gst/virtualdub/gstxsharpen.c: (gst_xsharpen_class_init): * gst/y4m/gsty4mencode.c: (gst_y4mencode_class_init): * sys/cdrom/gstcdplayer.c: (cdplayer_class_init): * sys/directsound/gstdirectsoundsink.c: (gst_directsoundsink_class_init): * sys/dxr3/dxr3audiosink.c: (dxr3audiosink_class_init): * sys/dxr3/dxr3spusink.c: (dxr3spusink_class_init): * sys/dxr3/dxr3videosink.c: (dxr3videosink_class_init): * sys/qcam/gstqcamsrc.c: (gst_qcamsrc_class_init): * sys/v4l2/gstv4l2colorbalance.c: (gst_v4l2_color_balance_channel_class_init): * sys/v4l2/gstv4l2tuner.c: (gst_v4l2_tuner_channel_class_init), (gst_v4l2_tuner_norm_class_init): * sys/ximagesrc/ximagesrc.c: (gst_ximagesrc_class_init): Fix #337365 (g_type_class_ref <-> g_type_class_peek_parent)
2006-04-08 21:48:01 +00:00
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_directsoundsink_dispose);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_directsoundsink_get_property);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_directsoundsink_set_property);
gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_directsoundsink_getcaps);
gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_directsoundsink_prepare);
gstaudiosink_class->unprepare =
GST_DEBUG_FUNCPTR (gst_directsoundsink_unprepare);
gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_directsoundsink_open);
gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_directsoundsink_close);
gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_directsoundsink_write);
gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_directsoundsink_delay);
gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_directsoundsink_reset);
}
static void
gst_directsoundsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDirectSoundSink *dsoundsink;
dsoundsink = GST_DIRECTSOUND_SINK (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_directsoundsink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDirectSoundSink *dsoundsink;
dsoundsink = GST_DIRECTSOUND_SINK (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_directsoundsink_init (GstDirectSoundSink * dsoundsink,
GstDirectSoundSinkClass g_class)
{
GST_DEBUG ("initializing directsoundsink");
dsoundsink->pDS = NULL;
dsoundsink->pDSBSecondary = NULL;
dsoundsink->current_circular_offset = 0;
dsoundsink->buffer_size = DSBSIZE_MIN;
}
static GstCaps *
gst_directsoundsink_getcaps (GstBaseSink * bsink)
{
GstDirectSoundSink *dsoundsink;
dsoundsink = GST_DIRECTSOUND_SINK (bsink);
return
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
(dsoundsink)));
}
static gboolean
gst_directsoundsink_open (GstAudioSink * asink)
{
GstDirectSoundSink *dsoundsink;
HRESULT hRes;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/* create and initialize a DirecSound object */
if (FAILED (hRes = DirectSoundCreate (NULL, &dsoundsink->pDS, NULL))) {
GST_ELEMENT_ERROR (dsoundsink, RESOURCE, OPEN_READ,
("gst_directsoundsink_open: DirectSoundCreate: %s",
DXGetErrorString9 (hRes)), (NULL));
return FALSE;
}
if (FAILED (hRes = IDirectSound_SetCooperativeLevel (dsoundsink->pDS,
GetDesktopWindow (), DSSCL_PRIORITY))) {
GST_ELEMENT_ERROR (dsoundsink, RESOURCE, OPEN_READ,
("gst_directsoundsink_open: IDirectSound_SetCooperativeLevel: %s",
DXGetErrorString9 (hRes)), (NULL));
return FALSE;
}
return TRUE;
}
static gboolean
gst_directsoundsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
{
GstDirectSoundSink *dsoundsink;
HRESULT hRes;
DSBUFFERDESC descSecondary;
WAVEFORMATEX wfx;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/*save number of bytes per sample */
dsoundsink->bytes_per_sample = spec->bytes_per_sample;
/* fill the WAVEFORMATEX struture with spec params */
memset (&wfx, 0, sizeof (wfx));
wfx.cbSize = sizeof (wfx);
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nChannels = spec->channels;
wfx.nSamplesPerSec = spec->rate;
wfx.wBitsPerSample = (spec->bytes_per_sample * 8) / wfx.nChannels;
wfx.nBlockAlign = spec->bytes_per_sample;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
GST_DEBUG
("GstRingBufferSpec->channels: %d, GstRingBufferSpec->rate: %d, GstRingBufferSpec->bytes_per_sample: %d\n"
"WAVEFORMATEX.nSamplesPerSec: %ld, WAVEFORMATEX.wBitsPerSample: %d, WAVEFORMATEX.nBlockAlign: %d, WAVEFORMATEX.nAvgBytesPerSec: %ld\n",
spec->channels, spec->rate, spec->bytes_per_sample, wfx.nSamplesPerSec,
wfx.wBitsPerSample, wfx.nBlockAlign, wfx.nAvgBytesPerSec);
/* directsound buffer size can handle 2 secs of the stream */
dsoundsink->buffer_size = wfx.nAvgBytesPerSec / 2;
/* create a secondary directsound buffer */
memset (&descSecondary, 0, sizeof (DSBUFFERDESC));
descSecondary.dwSize = sizeof (DSBUFFERDESC);
descSecondary.dwFlags = DSBCAPS_GETCURRENTPOSITION2 |
DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLVOLUME;
descSecondary.dwBufferBytes = dsoundsink->buffer_size;
descSecondary.lpwfxFormat = (WAVEFORMATEX *) & wfx;
hRes = IDirectSound_CreateSoundBuffer (dsoundsink->pDS, &descSecondary,
&dsoundsink->pDSBSecondary, NULL);
if (FAILED (hRes)) {
GST_ELEMENT_ERROR (dsoundsink, RESOURCE, OPEN_READ,
("gst_directsoundsink_prepare: IDirectSound_CreateSoundBuffer: %s",
DXGetErrorString9 (hRes)), (NULL));
return FALSE;
}
return TRUE;
}
static gboolean
gst_directsoundsink_unprepare (GstAudioSink * asink)
{
GstDirectSoundSink *dsoundsink;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/* release secondary DirectSound buffer */
if (dsoundsink->pDSBSecondary)
IDirectSoundBuffer_Release (dsoundsink->pDSBSecondary);
return TRUE;
}
static gboolean
gst_directsoundsink_close (GstAudioSink * asink)
{
GstDirectSoundSink *dsoundsink = NULL;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/* release DirectSound object */
g_return_val_if_fail (dsoundsink->pDS != NULL, FALSE);
IDirectSound_Release (dsoundsink->pDS);
return TRUE;
}
static guint
gst_directsoundsink_write (GstAudioSink * asink, gpointer data, guint length)
{
GstDirectSoundSink *dsoundsink;
DWORD dwStatus;
HRESULT hRes;
LPVOID pLockedBuffer1 = NULL, pLockedBuffer2 = NULL;
DWORD dwSizeBuffer1, dwSizeBuffer2;
DWORD dwCurrentPlayCursor;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/* get current buffer status */
hRes = IDirectSoundBuffer_GetStatus (dsoundsink->pDSBSecondary, &dwStatus);
/* get current play cursor position */
hRes = IDirectSoundBuffer_GetCurrentPosition (dsoundsink->pDSBSecondary,
&dwCurrentPlayCursor, NULL);
if (SUCCEEDED (hRes) && (dwStatus & DSBSTATUS_PLAYING)) {
DWORD dwFreeBufferSize;
calculate_freesize:
/* calculate the free size of the circular buffer */
if (dwCurrentPlayCursor < dsoundsink->current_circular_offset)
dwFreeBufferSize =
dsoundsink->buffer_size - (dsoundsink->current_circular_offset -
dwCurrentPlayCursor);
else
dwFreeBufferSize =
dwCurrentPlayCursor - dsoundsink->current_circular_offset;
if (length >= dwFreeBufferSize) {
Sleep (100);
hRes = IDirectSoundBuffer_GetCurrentPosition (dsoundsink->pDSBSecondary,
&dwCurrentPlayCursor, NULL);
goto calculate_freesize;
}
}
if (dwStatus & DSBSTATUS_BUFFERLOST) {
hRes = IDirectSoundBuffer_Restore (dsoundsink->pDSBSecondary); /*need a loop waiting the buffer is restored?? */
dsoundsink->current_circular_offset = 0;
}
hRes = IDirectSoundBuffer_Lock (dsoundsink->pDSBSecondary,
dsoundsink->current_circular_offset, length, &pLockedBuffer1,
&dwSizeBuffer1, &pLockedBuffer2, &dwSizeBuffer2, 0L);
if (SUCCEEDED (hRes)) {
// Write to pointers without reordering.
memcpy (pLockedBuffer1, data, dwSizeBuffer1);
if (pLockedBuffer2 != NULL)
memcpy (pLockedBuffer2, (LPBYTE) data + dwSizeBuffer1, dwSizeBuffer2);
// Update where the buffer will lock (for next time)
dsoundsink->current_circular_offset += dwSizeBuffer1 + dwSizeBuffer2;
dsoundsink->current_circular_offset %= dsoundsink->buffer_size; /* Circular buffer */
hRes = IDirectSoundBuffer_Unlock (dsoundsink->pDSBSecondary, pLockedBuffer1,
dwSizeBuffer1, pLockedBuffer2, dwSizeBuffer2);
}
/* if the buffer was not in playing state yet, call play on the buffer */
if (!(dwStatus & DSBSTATUS_PLAYING)) {
hRes = IDirectSoundBuffer_Play (dsoundsink->pDSBSecondary, 0, 0,
DSBPLAY_LOOPING);
}
return length;
}
static guint
gst_directsoundsink_delay (GstAudioSink * asink)
{
GstDirectSoundSink *dsoundsink;
HRESULT hRes;
DWORD dwCurrentPlayCursor;
DWORD dwBytesInQueue = 0;
gint nNbSamplesInQueue = 0;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
/*evaluate the number of samples in queue in the circular buffer */
hRes = IDirectSoundBuffer_GetCurrentPosition (dsoundsink->pDSBSecondary,
&dwCurrentPlayCursor, NULL);
if (hRes == S_OK) {
if (dwCurrentPlayCursor < dsoundsink->current_circular_offset)
dwBytesInQueue =
dsoundsink->current_circular_offset - dwCurrentPlayCursor;
else
dwBytesInQueue =
dsoundsink->current_circular_offset + (dsoundsink->buffer_size -
dwCurrentPlayCursor);
nNbSamplesInQueue = dwBytesInQueue / dsoundsink->bytes_per_sample;
}
return nNbSamplesInQueue;
}
static void
gst_directsoundsink_reset (GstAudioSink * asink)
{
/*not tested for seeking */
GstDirectSoundSink *dsoundsink;
dsoundsink = GST_DIRECTSOUND_SINK (asink);
IDirectSoundBuffer_Stop (dsoundsink->pDSBSecondary);
}