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461f943b52
When advancing the ringbuffer, store the processed CoreAudio sample time, then interpolate the clock in the _get_delay() calls to smooth the clock. CoreAudio's "latency" report is always a constant and otherwise leads to the clock generating a latency-time staircase. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5140>
180 lines
6.9 KiB
C
180 lines
6.9 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Fluendo S.A. <support@fluendo.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __GST_CORE_AUDIO_H__
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#define __GST_CORE_AUDIO_H__
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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 <gst/gst.h>
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#include <gst/audio/audio-channels.h>
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#ifdef HAVE_IOS
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#include <CoreAudio/CoreAudioTypes.h>
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#define AudioDeviceID gint
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#define kAudioDeviceUnknown 0
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#else
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#include <CoreAudio/CoreAudio.h>
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#include <AudioToolbox/AudioToolbox.h>
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#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
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#include <CoreServices/CoreServices.h>
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#define AudioComponentFindNext FindNextComponent
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#define AudioComponentInstanceNew OpenAComponent
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#define AudioComponentInstanceDispose CloseComponent
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#define AudioComponent Component
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#define AudioComponentDescription ComponentDescription
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#endif
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#endif
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#include <AudioUnit/AudioUnit.h>
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#include "gstosxaudioelement.h"
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G_BEGIN_DECLS
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#define GST_TYPE_CORE_AUDIO \
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(gst_core_audio_get_type())
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#define GST_CORE_AUDIO(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CORE_AUDIO,GstCoreAudio))
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#define GST_CORE_AUDIO_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CORE_AUDIO,GstCoreAudioClass))
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#define GST_CORE_AUDIO_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_CORE_AUDIO,GstCoreAudioClass))
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#define GST_IS_CORE_AUDIO(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CORE_AUDIO))
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#define GST_IS_CORE_AUDIO_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CORE_AUDIO))
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#define GST_OSX_AUDIO_MAX_CHANNEL (64)
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#define CORE_AUDIO_FORMAT_IS_SPDIF(f) ((f).mFormat.mFormatID == 'IAC3' || (f).mFormat.mFormatID == 'iac3' || (f).mFormat.mFormatID == kAudioFormat60958AC3 || (f).mFormat.mFormatID == kAudioFormatAC3)
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#define CORE_AUDIO_FORMAT "FormatID: %" GST_FOURCC_FORMAT " rate: %f flags: 0x%x BytesPerPacket: %u FramesPerPacket: %u BytesPerFrame: %u ChannelsPerFrame: %u BitsPerChannel: %u"
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#define CORE_AUDIO_FORMAT_ARGS(f) GST_FOURCC_ARGS((unsigned int)(f).mFormatID),(f).mSampleRate,(unsigned int)(f).mFormatFlags,(unsigned int)(f).mBytesPerPacket,(unsigned int)(f).mFramesPerPacket,(unsigned int)(f).mBytesPerFrame,(unsigned int)(f).mChannelsPerFrame,(unsigned int)(f).mBitsPerChannel
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#define CORE_AUDIO_INNER_SCOPE(core_audio) ((core_audio)->is_src ? kAudioUnitScope_Output : kAudioUnitScope_Input)
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#define CORE_AUDIO_OUTER_SCOPE(core_audio) ((core_audio)->is_src ? kAudioUnitScope_Input : kAudioUnitScope_Output)
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#define CORE_AUDIO_ELEMENT(core_audio) ((core_audio)->is_src ? 1 : 0)
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typedef struct _GstCoreAudio GstCoreAudio;
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typedef struct _GstCoreAudioClass GstCoreAudioClass;
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#define CORE_AUDIO_TIMING_LOCK(core_audio) (g_mutex_lock(&(core_audio->timing_lock)))
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#define CORE_AUDIO_TIMING_UNLOCK(core_audio) (g_mutex_unlock(&(core_audio->timing_lock)))
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struct _GstCoreAudio
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{
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GObject object;
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GstObject *osxbuf;
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GstOsxAudioElementInterface *element;
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gboolean is_src;
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gboolean is_passthrough;
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AudioDeviceID device_id;
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gboolean cached_caps_valid; /* thread-safe flag */
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GstCaps *cached_caps;
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gint stream_idx;
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gboolean io_proc_active;
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gboolean io_proc_needs_deactivation;
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/* For LPCM in/out */
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AudioUnit audiounit;
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UInt32 recBufferSize; /* AudioUnitRender clobbers mDataByteSize */
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AudioBufferList *recBufferList;
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#ifndef HAVE_IOS
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/* For SPDIF out */
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pid_t hog_pid;
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gboolean disabled_mixing;
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AudioStreamID stream_id;
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gboolean revert_format;
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AudioStreamBasicDescription original_format, stream_format;
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AudioDeviceIOProcID procID;
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#endif
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GMutex timing_lock;
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uint64_t anchor_hosttime;
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uint32_t anchor_pend_samples;
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float rate_scalar;
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};
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struct _GstCoreAudioClass
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{
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GObjectClass parent_class;
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};
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GType gst_core_audio_get_type (void);
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void gst_core_audio_init_debug (void);
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GstCoreAudio * gst_core_audio_new (GstObject *osxbuf);
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gboolean gst_core_audio_open (GstCoreAudio *core_audio);
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gboolean gst_core_audio_close (GstCoreAudio *core_audio);
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gboolean gst_core_audio_initialize (GstCoreAudio *core_audio,
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AudioStreamBasicDescription format,
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GstCaps *caps,
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guint32 frames_per_packet,
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gboolean is_passthrough);
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void gst_core_audio_uninitialize (GstCoreAudio *core_audio);
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gboolean gst_core_audio_start_processing (GstCoreAudio *core_audio);
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gboolean gst_core_audio_pause_processing (GstCoreAudio *core_audio);
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gboolean gst_core_audio_stop_processing (GstCoreAudio *core_audio);
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gboolean gst_core_audio_get_samples_and_latency (GstCoreAudio * core_audio,
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gdouble rate,
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guint *samples,
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gdouble *latency);
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void gst_core_audio_update_timing (GstCoreAudio * core_audio,
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const AudioTimeStamp * inTimeStamp,
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unsigned int inNumberFrames);
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void gst_core_audio_set_volume (GstCoreAudio *core_audio,
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gfloat volume);
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gboolean gst_core_audio_audio_device_is_spdif_avail (AudioDeviceID device_id);
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gboolean gst_core_audio_select_device (GstCoreAudio * core_audio);
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GstCaps *
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gst_core_audio_probe_caps (GstCoreAudio * core_audio, GstCaps * in_caps);
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AudioChannelLayout *
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gst_core_audio_get_channel_layout (GstCoreAudio * core_audio, gboolean outer);
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gboolean gst_core_audio_parse_channel_layout (AudioChannelLayout * layout,
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guint * channels, guint64 * channel_mask, GstAudioChannelPosition * pos);
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GstCaps * gst_core_audio_asbd_to_caps (AudioStreamBasicDescription * asbd,
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AudioChannelLayout * layout);
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G_END_DECLS
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#endif /* __GST_CORE_AUDIO_H__ */
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