forked from FFmpeg/FFmpeg
-
Notifications
You must be signed in to change notification settings - Fork 19
/
audiotoolbox.m
308 lines (264 loc) · 14 KB
/
audiotoolbox.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/*
* AudioToolbox output device
* Copyright (c) 2020 Thilo Borgmann <[email protected]>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* AudioToolbox output device
* @author Thilo Borgmann <[email protected]>
*/
#import <AudioToolbox/AudioToolbox.h>
#include <pthread.h>
#include "libavutil/opt.h"
#include "libavformat/internal.h"
#include "libavutil/internal.h"
#include "avdevice.h"
typedef struct
{
AVClass *class;
AudioQueueBufferRef buffer[2];
pthread_mutex_t buffer_lock[2];
int cur_buf;
AudioQueueRef queue;
int list_devices;
int audio_device_index;
} ATContext;
static int check_status(AVFormatContext *avctx, OSStatus *status, const char *msg)
{
if (*status != noErr) {
av_log(avctx, AV_LOG_ERROR, "Error: %s (%i)\n", msg, *status);
return 1;
} else {
av_log(avctx, AV_LOG_DEBUG, " OK : %s\n", msg);
return 0;
}
}
static void queue_callback(void* atctx, AudioQueueRef inAQ,
AudioQueueBufferRef inBuffer)
{
// unlock the buffer that has just been consumed
ATContext *ctx = (ATContext*)atctx;
for (int i = 0; i < 2; i++) {
if (inBuffer == ctx->buffer[i]) {
pthread_mutex_unlock(&ctx->buffer_lock[i]);
}
}
}
static av_cold int at_write_header(AVFormatContext *avctx)
{
ATContext *ctx = (ATContext*)avctx->priv_data;
OSStatus err = noErr;
CFStringRef device_UID = NULL;
AudioDeviceID *devices;
int num_devices;
// get devices
UInt32 data_size = 0;
AudioObjectPropertyAddress prop;
prop.mSelector = kAudioHardwarePropertyDevices;
prop.mScope = kAudioObjectPropertyScopeGlobal;
prop.mElement = kAudioObjectPropertyElementMaster;
err = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &prop, 0, NULL, &data_size);
if (check_status(avctx, &err, "AudioObjectGetPropertyDataSize devices"))
return AVERROR(EINVAL);
num_devices = data_size / sizeof(AudioDeviceID);
devices = (AudioDeviceID*)(av_malloc(data_size));
err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &prop, 0, NULL, &data_size, devices);
if (check_status(avctx, &err, "AudioObjectGetPropertyData devices")) {
av_freep(&devices);
return AVERROR(EINVAL);
}
// list devices
if (ctx->list_devices) {
CFStringRef device_name = NULL;
prop.mScope = kAudioDevicePropertyScopeInput;
av_log(ctx, AV_LOG_INFO, "CoreAudio devices:\n");
for(UInt32 i = 0; i < num_devices; ++i) {
// UID
data_size = sizeof(device_UID);
prop.mSelector = kAudioDevicePropertyDeviceUID;
err = AudioObjectGetPropertyData(devices[i], &prop, 0, NULL, &data_size, &device_UID);
if (check_status(avctx, &err, "AudioObjectGetPropertyData UID"))
continue;
// name
data_size = sizeof(device_name);
prop.mSelector = kAudioDevicePropertyDeviceNameCFString;
err = AudioObjectGetPropertyData(devices[i], &prop, 0, NULL, &data_size, &device_name);
if (check_status(avctx, &err, "AudioObjecTGetPropertyData name"))
continue;
av_log(ctx, AV_LOG_INFO, "[%d] %30s, %s\n", i,
CFStringGetCStringPtr(device_name, kCFStringEncodingMacRoman),
CFStringGetCStringPtr(device_UID, kCFStringEncodingMacRoman));
}
}
// get user-defined device UID or use default device
// -audio_device_index overrides any URL given
const char *stream_name = avctx->url;
if (stream_name && ctx->audio_device_index == -1) {
sscanf(stream_name, "%d", &ctx->audio_device_index);
}
if (ctx->audio_device_index >= 0) {
// get UID of selected device
data_size = sizeof(device_UID);
prop.mSelector = kAudioDevicePropertyDeviceUID;
err = AudioObjectGetPropertyData(devices[ctx->audio_device_index], &prop, 0, NULL, &data_size, &device_UID);
if (check_status(avctx, &err, "AudioObjecTGetPropertyData UID")) {
av_freep(&devices);
return AVERROR(EINVAL);
}
} else {
// use default device
device_UID = NULL;
}
av_log(ctx, AV_LOG_DEBUG, "stream_name: %s\n", stream_name);
av_log(ctx, AV_LOG_DEBUG, "audio_device_idnex: %i\n", ctx->audio_device_index);
av_log(ctx, AV_LOG_DEBUG, "UID: %s\n", CFStringGetCStringPtr(device_UID, kCFStringEncodingMacRoman));
// check input stream
if (avctx->nb_streams != 1 || avctx->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
av_log(ctx, AV_LOG_ERROR, "Only a single audio stream is supported.\n");
return AVERROR(EINVAL);
}
av_freep(&devices);
AVCodecParameters *codecpar = avctx->streams[0]->codecpar;
// audio format
AudioStreamBasicDescription device_format = {0};
device_format.mSampleRate = codecpar->sample_rate;
device_format.mFormatID = kAudioFormatLinearPCM;
device_format.mFormatFlags |= (codecpar->format == AV_SAMPLE_FMT_FLT) ? kLinearPCMFormatFlagIsFloat : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_CODEC_ID_PCM_S8) ? kLinearPCMFormatFlagIsSignedInteger : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE)) ? kLinearPCMFormatFlagIsSignedInteger : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S24BE, AV_CODEC_ID_PCM_S24LE)) ? kLinearPCMFormatFlagIsSignedInteger : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S32BE, AV_CODEC_ID_PCM_S32LE)) ? kLinearPCMFormatFlagIsSignedInteger : 0;
device_format.mFormatFlags |= (av_sample_fmt_is_planar(codecpar->format)) ? kAudioFormatFlagIsNonInterleaved : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_CODEC_ID_PCM_F32BE) ? kAudioFormatFlagIsBigEndian : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) ? kAudioFormatFlagIsBigEndian : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_CODEC_ID_PCM_S24BE) ? kAudioFormatFlagIsBigEndian : 0;
device_format.mFormatFlags |= (codecpar->codec_id == AV_CODEC_ID_PCM_S32BE) ? kAudioFormatFlagIsBigEndian : 0;
device_format.mChannelsPerFrame = codecpar->channels;
device_format.mBitsPerChannel = (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S24BE, AV_CODEC_ID_PCM_S24LE)) ? 24 : (av_get_bytes_per_sample(codecpar->format) << 3);
device_format.mBytesPerFrame = (device_format.mBitsPerChannel >> 3) * device_format.mChannelsPerFrame;
device_format.mFramesPerPacket = 1;
device_format.mBytesPerPacket = device_format.mBytesPerFrame * device_format.mFramesPerPacket;
device_format.mReserved = 0;
av_log(ctx, AV_LOG_DEBUG, "device_format.mSampleRate = %i\n", codecpar->sample_rate);
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatID = %s\n", "kAudioFormatLinearPCM");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->format == AV_SAMPLE_FMT_FLT) ? "kLinearPCMFormatFlagIsFloat" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_CODEC_ID_PCM_S8) ? "kLinearPCMFormatFlagIsSignedInteger" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S32BE, AV_CODEC_ID_PCM_S32LE)) ? "kLinearPCMFormatFlagIsSignedInteger" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE)) ? "kLinearPCMFormatFlagIsSignedInteger" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_NE(AV_CODEC_ID_PCM_S24BE, AV_CODEC_ID_PCM_S24LE)) ? "kLinearPCMFormatFlagIsSignedInteger" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (av_sample_fmt_is_planar(codecpar->format)) ? "kAudioFormatFlagIsNonInterleaved" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_CODEC_ID_PCM_F32BE) ? "kAudioFormatFlagIsBigEndian" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) ? "kAudioFormatFlagIsBigEndian" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_CODEC_ID_PCM_S24BE) ? "kAudioFormatFlagIsBigEndian" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags |= %s\n", (codecpar->codec_id == AV_CODEC_ID_PCM_S32BE) ? "kAudioFormatFlagIsBigEndian" : "0");
av_log(ctx, AV_LOG_DEBUG, "device_format.mFormatFlags == %i\n", device_format.mFormatFlags);
av_log(ctx, AV_LOG_DEBUG, "device_format.mChannelsPerFrame = %i\n", codecpar->channels);
av_log(ctx, AV_LOG_DEBUG, "device_format.mBitsPerChannel = %i\n", av_get_bytes_per_sample(codecpar->format) << 3);
av_log(ctx, AV_LOG_DEBUG, "device_format.mBytesPerFrame = %i\n", (device_format.mBitsPerChannel >> 3) * codecpar->channels);
av_log(ctx, AV_LOG_DEBUG, "device_format.mBytesPerPacket = %i\n", device_format.mBytesPerFrame);
av_log(ctx, AV_LOG_DEBUG, "device_format.mFramesPerPacket = %i\n", 1);
av_log(ctx, AV_LOG_DEBUG, "device_format.mReserved = %i\n", 0);
// create new output queue for the device
err = AudioQueueNewOutput(&device_format, queue_callback, ctx,
NULL, kCFRunLoopCommonModes,
0, &ctx->queue);
if (check_status(avctx, &err, "AudioQueueNewOutput")) {
if (err == kAudioFormatUnsupportedDataFormatError)
av_log(ctx, AV_LOG_ERROR, "Unsupported output format.\n");
return AVERROR(EINVAL);
}
// set user-defined device or leave untouched for default
if (device_UID != NULL) {
err = AudioQueueSetProperty(ctx->queue, kAudioQueueProperty_CurrentDevice, &device_UID, sizeof(device_UID));
if (check_status(avctx, &err, "AudioQueueSetProperty output UID"))
return AVERROR(EINVAL);
}
// start the queue
err = AudioQueueStart(ctx->queue, NULL);
if (check_status(avctx, &err, "AudioQueueStart"))
return AVERROR(EINVAL);
// init the mutexes for double-buffering
pthread_mutex_init(&ctx->buffer_lock[0], NULL);
pthread_mutex_init(&ctx->buffer_lock[1], NULL);
return 0;
}
static int at_write_packet(AVFormatContext *avctx, AVPacket *pkt)
{
ATContext *ctx = (ATContext*)avctx->priv_data;
OSStatus err = noErr;
// use the other buffer
ctx->cur_buf = !ctx->cur_buf;
// lock for writing or wait for the buffer to be available
// will be unlocked by queue callback
pthread_mutex_lock(&ctx->buffer_lock[ctx->cur_buf]);
// (re-)allocate the buffer if not existant or of different size
if (!ctx->buffer[ctx->cur_buf] || ctx->buffer[ctx->cur_buf]->mAudioDataBytesCapacity != pkt->size) {
err = AudioQueueAllocateBuffer(ctx->queue, pkt->size, &ctx->buffer[ctx->cur_buf]);
if (check_status(avctx, &err, "AudioQueueAllocateBuffer")) {
pthread_mutex_unlock(&ctx->buffer_lock[ctx->cur_buf]);
return AVERROR(ENOMEM);
}
}
AudioQueueBufferRef buf = ctx->buffer[ctx->cur_buf];
// copy audio data into buffer and enqueue the buffer
memcpy(buf->mAudioData, pkt->data, buf->mAudioDataBytesCapacity);
buf->mAudioDataByteSize = buf->mAudioDataBytesCapacity;
err = AudioQueueEnqueueBuffer(ctx->queue, buf, 0, NULL);
if (check_status(avctx, &err, "AudioQueueEnqueueBuffer")) {
pthread_mutex_unlock(&ctx->buffer_lock[ctx->cur_buf]);
return AVERROR(EINVAL);
}
return 0;
}
static av_cold int at_write_trailer(AVFormatContext *avctx)
{
ATContext *ctx = (ATContext*)avctx->priv_data;
OSStatus err = noErr;
pthread_mutex_destroy(&ctx->buffer_lock[0]);
pthread_mutex_destroy(&ctx->buffer_lock[1]);
err = AudioQueueFlush(ctx->queue);
check_status(avctx, &err, "AudioQueueFlush");
err = AudioQueueDispose(ctx->queue, true);
check_status(avctx, &err, "AudioQueueDispose");
return 0;
}
static const AVOption options[] = {
{ "list_devices", "list available audio devices", offsetof(ATContext, list_devices), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
{ "audio_device_index", "select audio device by index (starts at 0)", offsetof(ATContext, audio_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ NULL },
};
static const AVClass at_class = {
.class_name = "AudioToolbox",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
};
const AVOutputFormat ff_audiotoolbox_muxer = {
.name = "audiotoolbox",
.long_name = NULL_IF_CONFIG_SMALL("AudioToolbox output device"),
.priv_data_size = sizeof(ATContext),
.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
.video_codec = AV_CODEC_ID_NONE,
.write_header = at_write_header,
.write_packet = at_write_packet,
.write_trailer = at_write_trailer,
.flags = AVFMT_NOFILE,
.priv_class = &at_class,
};