/* GStreamer * Copyright (C) 2005 Sebastien Moutte * Copyright (C) 2007 Pioneers of the Inevitable * Copyright (C) 2010 Fluendo S.A. * * 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. * * * The development of this code was made possible due to the involvement * of Pioneers of the Inevitable, the creators of the Songbird Music player * */ /** * SECTION:element-directsoundsink * * This element lets you output sound using the DirectSound API. * * Note that you should almost always use generic audio conversion elements * like audioconvert and audioresample in front of an audiosink to make sure * your pipeline works under all circumstances (those conversion elements will * act in passthrough-mode if no conversion is necessary). * * * Example pipelines * |[ * gst-launch -v audiotestsrc ! audioconvert ! volume volume=0.1 ! directsoundsink * ]| will output a sine wave (continuous beep sound) to your sound card (with * a very low volume as precaution). * |[ * gst-launch -v filesrc location=music.ogg ! decodebin ! audioconvert ! audioresample ! directsoundsink * ]| will play an Ogg/Vorbis audio file and output it. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstdirectsoundsink.h" #include #ifdef __CYGWIN__ #include #ifndef _swab #define _swab swab #endif #endif #define DEFAULT_MUTE FALSE GST_DEBUG_CATEGORY_STATIC (directsoundsink_debug); #define GST_CAT_DEFAULT directsoundsink_debug static void gst_directsound_sink_finalize (GObject * object); static void gst_directsound_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_directsound_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstCaps *gst_directsound_sink_getcaps (GstBaseSink * bsink, GstCaps * filter); static gboolean gst_directsound_sink_prepare (GstAudioSink * asink, GstAudioRingBufferSpec * spec); static gboolean gst_directsound_sink_unprepare (GstAudioSink * asink); static gboolean gst_directsound_sink_open (GstAudioSink * asink); static gboolean gst_directsound_sink_close (GstAudioSink * asink); static gint gst_directsound_sink_write (GstAudioSink * asink, gpointer data, guint length); static guint gst_directsound_sink_delay (GstAudioSink * asink); static void gst_directsound_sink_reset (GstAudioSink * asink); static GstCaps *gst_directsound_probe_supported_formats (GstDirectSoundSink * dsoundsink, const GstCaps * template_caps); static void gst_directsound_sink_set_volume (GstDirectSoundSink * sink, gdouble volume, gboolean store); static gdouble gst_directsound_sink_get_volume (GstDirectSoundSink * sink); static void gst_directsound_sink_set_mute (GstDirectSoundSink * sink, gboolean mute); static gboolean gst_directsound_sink_get_mute (GstDirectSoundSink * sink); static GstStaticPadTemplate directsoundsink_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) S16LE, " "layout = (string) interleaved, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; " "audio/x-raw, " "format = (string) S8, " "layout = (string) interleaved, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ];" "audio/x-iec958")); enum { PROP_0, PROP_VOLUME, PROP_MUTE }; #define gst_directsound_sink_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstDirectSoundSink, gst_directsound_sink, GST_TYPE_AUDIO_SINK, G_IMPLEMENT_INTERFACE (GST_TYPE_STREAM_VOLUME, NULL) ); static void gst_directsound_sink_finalize (GObject * object) { G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_directsound_sink_class_init (GstDirectSoundSinkClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstBaseSinkClass *gstbasesink_class = GST_BASE_SINK_CLASS (klass); GstAudioSinkClass *gstaudiosink_class = GST_AUDIO_SINK_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GST_DEBUG_CATEGORY_INIT (directsoundsink_debug, "directsoundsink", 0, "DirectSound sink"); parent_class = g_type_class_peek_parent (klass); gobject_class->finalize = gst_directsound_sink_finalize; gobject_class->set_property = gst_directsound_sink_set_property; gobject_class->get_property = gst_directsound_sink_get_property; gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_directsound_sink_getcaps); gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_directsound_sink_prepare); gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_directsound_sink_unprepare); gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_directsound_sink_open); gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_directsound_sink_close); gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_directsound_sink_write); gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_directsound_sink_delay); gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_directsound_sink_reset); g_object_class_install_property (gobject_class, PROP_VOLUME, g_param_spec_double ("volume", "Volume", "Volume of this stream", 0.0, 1.0, 1.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_MUTE, g_param_spec_boolean ("mute", "Mute", "Mute state of this stream", DEFAULT_MUTE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_set_details_simple (element_class, "Direct Sound Audio Sink", "Sink/Audio", "Output to a sound card via Direct Sound", "Sebastien Moutte "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&directsoundsink_sink_factory)); } static void gst_directsound_sink_init (GstDirectSoundSink * dsoundsink) { dsoundsink->volume = 100; dsoundsink->mute = FALSE; dsoundsink->pDS = NULL; dsoundsink->cached_caps = NULL; dsoundsink->pDSBSecondary = NULL; dsoundsink->current_circular_offset = 0; dsoundsink->buffer_size = DSBSIZE_MIN; dsoundsink->volume = 100; dsoundsink->dsound_lock = g_mutex_new (); dsoundsink->first_buffer_after_reset = FALSE; } static void gst_directsound_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDirectSoundSink *sink = GST_DIRECTSOUND_SINK (object); switch (prop_id) { case PROP_VOLUME: gst_directsound_sink_set_volume (sink, g_value_get_double (value), TRUE); break; case PROP_MUTE: gst_directsound_sink_set_mute (sink, g_value_get_boolean (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_directsound_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDirectSoundSink *sink = GST_DIRECTSOUND_SINK (object); switch (prop_id) { case PROP_VOLUME: g_value_set_double (value, gst_directsound_sink_get_volume (sink)); break; case PROP_MUTE: g_value_set_boolean (value, gst_directsound_sink_get_mute (sink)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstCaps * gst_directsound_sink_getcaps (GstBaseSink * bsink, GstCaps * filter) { GstElementClass *element_class; GstPadTemplate *pad_template; GstDirectSoundSink *dsoundsink = GST_DIRECTSOUND_SINK (bsink); GstCaps *caps; gchar *caps_string = NULL; if (dsoundsink->pDS == NULL) { GST_DEBUG_OBJECT (dsoundsink, "device not open, using template caps"); return NULL; /* base class will get template caps for us */ } if (dsoundsink->cached_caps) { caps_string = gst_caps_to_string (dsoundsink->cached_caps); GST_DEBUG_OBJECT (dsoundsink, "Returning cached caps: %s", caps_string); g_free (caps_string); return gst_caps_ref (dsoundsink->cached_caps); } element_class = GST_ELEMENT_GET_CLASS (dsoundsink); pad_template = gst_element_class_get_pad_template (element_class, "sink"); g_return_val_if_fail (pad_template != NULL, NULL); caps = gst_directsound_probe_supported_formats (dsoundsink, gst_pad_template_get_caps (pad_template)); if (caps) { dsoundsink->cached_caps = gst_caps_ref (caps); } if (caps) { gchar *caps_string = gst_caps_to_string (caps); GST_DEBUG_OBJECT (dsoundsink, "returning caps %s", caps_string); g_free (caps_string); } return caps; } static gboolean gst_directsound_sink_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_directsound_sink_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_directsound_sink_open: IDirectSound_SetCooperativeLevel: %s", DXGetErrorString9 (hRes)), (NULL)); return FALSE; } return TRUE; } static gboolean gst_directsound_sink_prepare (GstAudioSink * asink, GstAudioRingBufferSpec * spec) { GstDirectSoundSink *dsoundsink; HRESULT hRes; DSBUFFERDESC descSecondary; WAVEFORMATEX wfx; dsoundsink = GST_DIRECTSOUND_SINK (asink); /*save number of bytes per sample and buffer format */ dsoundsink->bytes_per_sample = spec->info.bpf; dsoundsink->type = spec->type; /* fill the WAVEFORMATEX structure with spec params */ memset (&wfx, 0, sizeof (wfx)); if (spec->type != GST_AUDIO_RING_BUFFER_FORMAT_TYPE_IEC958) { wfx.cbSize = sizeof (wfx); wfx.wFormatTag = WAVE_FORMAT_PCM; wfx.nChannels = spec->info.channels; wfx.nSamplesPerSec = spec->info.rate; wfx.wBitsPerSample = (spec->info.bpf * 8) / wfx.nChannels; wfx.nBlockAlign = spec->info.bpf; wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign; /* Create directsound buffer with size based on our configured * buffer_size (which is 200 ms by default) */ dsoundsink->buffer_size = gst_util_uint64_scale_int (wfx.nAvgBytesPerSec, spec->buffer_time, GST_MSECOND); /* Make sure we make those numbers multiple of our sample size in bytes */ dsoundsink->buffer_size += dsoundsink->buffer_size % spec->info.bpf; spec->segsize = gst_util_uint64_scale_int (wfx.nAvgBytesPerSec, spec->latency_time, GST_MSECOND); spec->segsize += spec->segsize % spec->info.bpf; spec->segtotal = dsoundsink->buffer_size / spec->segsize; } else { #ifdef WAVE_FORMAT_DOLBY_AC3_SPDIF wfx.cbSize = 0; wfx.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF; wfx.nChannels = 2; wfx.nSamplesPerSec = spec->info.rate; wfx.wBitsPerSample = 16; wfx.nBlockAlign = wfx.wBitsPerSample / 8 * wfx.nChannels; wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign; spec->segsize = 6144; spec->segtotal = 10; #else g_assert_not_reached (); #endif } // Make the final buffer size be an integer number of segments dsoundsink->buffer_size = spec->segsize * spec->segtotal; GST_INFO_OBJECT (dsoundsink, "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" "Size of dsound circular buffer=>%d\n", spec->info.channels, spec->info.rate, spec->info.bpf, wfx.nSamplesPerSec, wfx.wBitsPerSample, wfx.nBlockAlign, wfx.nAvgBytesPerSec, dsoundsink->buffer_size); /* create a secondary directsound buffer */ memset (&descSecondary, 0, sizeof (DSBUFFERDESC)); descSecondary.dwSize = sizeof (DSBUFFERDESC); descSecondary.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS; if (spec->type != GST_AUDIO_RING_BUFFER_FORMAT_TYPE_IEC958) descSecondary.dwFlags |= 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_directsound_sink_prepare: IDirectSound_CreateSoundBuffer: %s", DXGetErrorString9 (hRes)), (NULL)); return FALSE; } gst_directsound_sink_set_volume (dsoundsink, dsoundsink->volume, FALSE); return TRUE; } static gboolean gst_directsound_sink_unprepare (GstAudioSink * asink) { GstDirectSoundSink *dsoundsink; dsoundsink = GST_DIRECTSOUND_SINK (asink); /* release secondary DirectSound buffer */ if (dsoundsink->pDSBSecondary) { IDirectSoundBuffer_Release (dsoundsink->pDSBSecondary); dsoundsink->pDSBSecondary = NULL; } return TRUE; } static gboolean gst_directsound_sink_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); dsoundsink->pDS = NULL; gst_caps_replace (&dsoundsink->cached_caps, NULL); return TRUE; } static gint gst_directsound_sink_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); /* Fix endianness */ if (dsoundsink->type == GST_AUDIO_RING_BUFFER_FORMAT_TYPE_IEC958) _swab (data, data, length); GST_DSOUND_LOCK (dsoundsink); /* 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); hRes = IDirectSoundBuffer_GetStatus (dsoundsink->pDSBSecondary, &dwStatus); if (SUCCEEDED (hRes) && (dwStatus & DSBSTATUS_PLAYING)) goto calculate_freesize; else { dsoundsink->first_buffer_after_reset = FALSE; GST_DSOUND_UNLOCK (dsoundsink); return 0; } } } 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 except if this buffer is the fist after a reset (base class call reset and write a buffer when setting the sink to pause) */ if (!(dwStatus & DSBSTATUS_PLAYING) && dsoundsink->first_buffer_after_reset == FALSE) { hRes = IDirectSoundBuffer_Play (dsoundsink->pDSBSecondary, 0, 0, DSBPLAY_LOOPING); } dsoundsink->first_buffer_after_reset = FALSE; GST_DSOUND_UNLOCK (dsoundsink); return length; } static guint gst_directsound_sink_delay (GstAudioSink * asink) { GstDirectSoundSink *dsoundsink; HRESULT hRes; DWORD dwCurrentPlayCursor; DWORD dwBytesInQueue = 0; gint nNbSamplesInQueue = 0; DWORD dwStatus; dsoundsink = GST_DIRECTSOUND_SINK (asink); /* get current buffer status */ hRes = IDirectSoundBuffer_GetStatus (dsoundsink->pDSBSecondary, &dwStatus); if (dwStatus & DSBSTATUS_PLAYING) { /*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_directsound_sink_reset (GstAudioSink * asink) { GstDirectSoundSink *dsoundsink; LPVOID pLockedBuffer = NULL; DWORD dwSizeBuffer = 0; dsoundsink = GST_DIRECTSOUND_SINK (asink); GST_DSOUND_LOCK (dsoundsink); if (dsoundsink->pDSBSecondary) { /*stop playing */ HRESULT hRes = IDirectSoundBuffer_Stop (dsoundsink->pDSBSecondary); /*reset position */ hRes = IDirectSoundBuffer_SetCurrentPosition (dsoundsink->pDSBSecondary, 0); dsoundsink->current_circular_offset = 0; /*reset the buffer */ hRes = IDirectSoundBuffer_Lock (dsoundsink->pDSBSecondary, dsoundsink->current_circular_offset, dsoundsink->buffer_size, &pLockedBuffer, &dwSizeBuffer, NULL, NULL, 0L); if (SUCCEEDED (hRes)) { memset (pLockedBuffer, 0, dwSizeBuffer); hRes = IDirectSoundBuffer_Unlock (dsoundsink->pDSBSecondary, pLockedBuffer, dwSizeBuffer, NULL, 0); } } dsoundsink->first_buffer_after_reset = TRUE; GST_DSOUND_UNLOCK (dsoundsink); } /* * gst_directsound_probe_supported_formats: * * Takes the template caps and returns the subset which is actually * supported by this device. * */ static GstCaps * gst_directsound_probe_supported_formats (GstDirectSoundSink * dsoundsink, const GstCaps * template_caps) { HRESULT hRes; DSBUFFERDESC descSecondary; WAVEFORMATEX wfx; GstCaps *caps; caps = gst_caps_copy (template_caps); /* * Check availability of digital output by trying to create an SPDIF buffer */ #ifdef WAVE_FORMAT_DOLBY_AC3_SPDIF /* fill the WAVEFORMATEX structure with some standard AC3 over SPDIF params */ memset (&wfx, 0, sizeof (wfx)); wfx.cbSize = 0; wfx.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF; wfx.nChannels = 2; wfx.nSamplesPerSec = 48000; wfx.wBitsPerSample = 16; wfx.nBlockAlign = 4; wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign; // create a secondary directsound buffer memset (&descSecondary, 0, sizeof (DSBUFFERDESC)); descSecondary.dwSize = sizeof (DSBUFFERDESC); descSecondary.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS; descSecondary.dwBufferBytes = 6144; descSecondary.lpwfxFormat = &wfx; hRes = IDirectSound_CreateSoundBuffer (dsoundsink->pDS, &descSecondary, &dsoundsink->pDSBSecondary, NULL); if (FAILED (hRes)) { GST_INFO_OBJECT (dsoundsink, "AC3 passthrough not supported " "(IDirectSound_CreateSoundBuffer returned: %s)\n", DXGetErrorString9 (hRes)); caps = gst_caps_subtract (caps, gst_caps_new_empty_simple ("audio/x-iec958")); } else { GST_INFO_OBJECT (dsoundsink, "AC3 passthrough supported"); hRes = IDirectSoundBuffer_Release (dsoundsink->pDSBSecondary); if (FAILED (hRes)) { GST_DEBUG_OBJECT (dsoundsink, "(IDirectSoundBuffer_Release returned: %s)\n", DXGetErrorString9 (hRes)); } } #else caps = gst_caps_subtract (caps, gst_caps_new_simple ("audio/x-iec958", NULL)); #endif return caps; } static void gst_directsound_sink_set_volume (GstDirectSoundSink * dsoundsink, gdouble dvolume, gboolean store) { glong volume; volume = dvolume * 100; if (store) dsoundsink->volume = volume; if (dsoundsink->pDSBSecondary) { /* DirectSound controls volume using units of 100th of a decibel, * ranging from -10000 to 0. We use a linear scale of 0 - 100 * here, so remap. */ long dsVolume; if (dsoundsink->volume == 0) dsVolume = -10000; else dsVolume = 100 * (long) (20 * log10 ((double) dsoundsink->volume / 100.)); dsVolume = CLAMP (dsVolume, -10000, 0); GST_DEBUG_OBJECT (dsoundsink, "Setting volume on secondary buffer to %d from %d", (int) dsVolume, (int) dsoundsink->volume); IDirectSoundBuffer_SetVolume (dsoundsink->pDSBSecondary, dsVolume); } } gdouble gst_directsound_sink_get_volume (GstDirectSoundSink * dsoundsink) { return (gdouble) dsoundsink->volume / 100; } static void gst_directsound_sink_set_mute (GstDirectSoundSink * dsoundsink, gboolean mute) { if (mute) gst_directsound_sink_set_volume (dsoundsink, 0, FALSE); else gst_directsound_sink_set_volume (dsoundsink, dsoundsink->volume, FALSE); } static gboolean gst_directsound_sink_get_mute (GstDirectSoundSink * dsoundsink) { return FALSE; }