osx_write.c

   1 /*
   2  * Copyright (C) 2006-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file osx_write.c paraslash's output plugin for MacOs */
   8
   9 /*
  10  * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
  11  * <skortze@sourceforge.net>
  12  */
  13
  14 #include <regex.h>
  15 #include <sys/types.h>
  16 #include <dirent.h>
  17 #include <stdbool.h>
  18
  19 #include "para.h"
  20 #include "fd.h"
  21 #include "string.h"
  22 #include "list.h"
  23 #include "sched.h"
  24 #include "ggo.h"
  25 #include "buffer_tree.h"
  26 #include "write.h"
  27 #include "write_common.h"
  28 #include "osx_write.cmdline.h"
  29 #include "error.h"
  30
  31 #include <CoreServices/CoreServices.h>
  32 #include <AudioUnit/AudioUnit.h>
  33 #include <AudioToolbox/AudioToolbox.h>
  34
  35 /** describes one input buffer for the osx writer */
  36 struct osx_buffer {
  37         /** pointer to the beginning of the buffer */
  38         float *buffer;
  39         /** the size of this buffer */
  40         long size;
  41         /** current position in the buffer */
  42         float *ptr;
  43         /** number of floats not yet consuned */
  44         long remaining;
  45         /** pointer to the next audio buffer */
  46         struct osx_buffer *next;
  47 };
  48
  49 /** data specific to the osx writer */
  50 struct private_osx_write_data {
  51         /** the main control structure for audio data manipulation */
  52         AudioUnit audio_unit;
  53         /** non-zero if playback has started */
  54         char play;
  55         /** callback reads audio data from this buffer */
  56         struct osx_buffer *from;
  57         /** the post_select writes audio data here */
  58         struct osx_buffer *to;
  59         /** sample rate of the current audio stream */
  60         unsigned sample_rate;
  61         /** Sample format of the current audio stream */
  62         unsigned sample_format;
  63         /** number of channels of the current audio stream */
  64         unsigned channels;
  65 };
  66
  67 static void destroy_buffers(struct private_osx_write_data *powd)
  68 {
  69         struct osx_buffer *ptr;
  70         struct osx_buffer *ptr2;
  71         ptr = powd->to->next;
  72         powd->to->next = NULL;
  73         while (ptr) {
  74                 ptr2 = ptr->next;
  75                 free(ptr->buffer);
  76                 free(ptr);
  77                 ptr = ptr2;
  78         }
  79 }
  80
  81 static void init_buffers(struct writer_node *wn)
  82 {
  83         struct private_osx_write_data *powd = wn->private_data;
  84         struct osx_write_args_info *conf = wn->conf;
  85         struct osx_buffer **ptrptr;
  86         int i;
  87
  88         ptrptr = &powd->to;
  89         for (i = 0; i < conf->numbuffers_arg; i++) {
  90                 *ptrptr = para_malloc(sizeof(struct osx_buffer));
  91                 (*ptrptr)->size = 0;
  92                 (*ptrptr)->remaining = 0;
  93                 (*ptrptr)->buffer = NULL;
  94                 ptrptr = &(*ptrptr)->next;
  95         }
  96         *ptrptr = powd->from = powd->to;
  97 }
  98
  99 static void fill_buffer(struct private_osx_write_data *powd, char *data, long bytes)
 100 {
 101         struct osx_buffer *b = powd->to;
 102         float *dest;
 103         long samples;
 104         enum sample_format sf = powd->sample_format;
 105
 106         samples = (sf == SF_S8 || sf == SF_U8)? bytes : bytes / 2;
 107         assert(b->remaining == 0 || samples > 0);
 108         if (b->size != samples) {
 109                 b->buffer = para_realloc(b->buffer, samples * sizeof(float));
 110                 b->size = samples;
 111         }
 112         dest = b->buffer;
 113         switch (powd->sample_format) {
 114         case SF_U8: {
 115                 uint8_t *src = (uint8_t *)data;
 116                 while (samples--) {
 117                         *dest++ = (*src++) / 256.0;
 118                 }
 119                 break;
 120         }
 121         case SF_S8: {
 122                 int8_t *src = (int8_t *)data;
 123                 while (samples--) {
 124                         *dest++ = ((*src++) + 128) / 256.0;
 125                 }
 126                 break;
 127         }
 128         default: {
 129                 short *src = (short *)data;
 130                 while (samples--)
 131                         *dest++ = (*src++) / 32768.0;
 132         }
 133         }
 134         b->ptr = b->buffer;
 135         b->remaining = b->size;
 136 }
 137
 138 static OSStatus osx_callback(void * inClientData,
 139         __a_unused AudioUnitRenderActionFlags *inActionFlags,
 140         __a_unused const AudioTimeStamp *inTimeStamp,
 141         __a_unused  UInt32 inBusNumber,
 142         __a_unused UInt32 inNumFrames,
 143         AudioBufferList *outOutputData)
 144 {
 145         long m, n;
 146         float *dest;
 147         int i;
 148         struct private_osx_write_data *powd = inClientData;
 149
 150 //      PARA_INFO_LOG("%p\n", powd);
 151         for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
 152                 /* what we have to fill */
 153                 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
 154                 dest = outOutputData->mBuffers[i].mData;
 155                 while (m > 0) {
 156                         n = powd->from->remaining;
 157                         if (n <= 0) {
 158                                 n = powd->from->next->remaining;
 159                                 if (n <= 0) {
 160                                         PARA_INFO_LOG("buffer underrun\n");
 161                                         return 0;
 162                                 }
 163                                 powd->from = powd->from->next;
 164                         }
 165 //                      PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
 166                         /*
 167                          * we dump what we can. In fact, just the necessary
 168                          * should be sufficient
 169                          */
 170                         if (n > m)
 171                                 n = m;
 172                         memcpy(dest, powd->from->ptr, n * sizeof(float));
 173                         dest += n;
 174                         /* remember all done work */
 175                         m -= n;
 176                         powd->from->ptr += n;
 177                         if ((powd->from->remaining -= n) <= 0)
 178                                 powd->from = powd->from->next;
 179                 }
 180         }
 181         return 0;
 182 }
 183
 184 #ifdef WORDS_BIGENDIAN /* ppc */
 185 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
 186 #else
 187 #define ENDIAN_FLAGS 0
 188 #endif
 189
 190 static int core_audio_init(struct writer_node *wn)
 191 {
 192         struct private_osx_write_data *powd = para_calloc(sizeof(*powd));
 193         ComponentDescription desc;
 194         Component comp;
 195         AURenderCallbackStruct inputCallback = {osx_callback, powd};
 196         AudioStreamBasicDescription format;
 197         int ret;
 198         struct btr_node *btrn = wn->btrn;
 199         int32_t val;
 200
 201         wn->private_data = powd;
 202         init_buffers(wn);
 203         /* where did that default audio output go? */
 204         desc.componentType = kAudioUnitType_Output;
 205         desc.componentSubType = kAudioUnitSubType_DefaultOutput;
 206         /* NOTE: and if default output isn't Apple? */
 207         desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 208         desc.componentFlags = 0;
 209         desc.componentFlagsMask = 0;
 210         ret = -E_DEFAULT_COMP;
 211         comp = FindNextComponent(NULL, &desc);
 212         if (!comp)
 213                 goto e0;
 214         ret = -E_OPEN_COMP;
 215         if (OpenAComponent(comp, &powd->audio_unit))
 216                 goto e0;
 217         ret = -E_UNIT_INIT;
 218         if (AudioUnitInitialize(powd->audio_unit))
 219                 goto e1;
 220         powd->play = 0;
 221         get_btr_sample_rate(btrn, &val);
 222         powd->sample_rate = val;
 223         get_btr_channels(btrn, &val);
 224         powd->channels = val;
 225         get_btr_sample_format(btrn, &val);
 226         powd->sample_format = val;
 227         /*
 228          * Choose PCM format. We tell the Output Unit what format we're going
 229          * to supply data to it. This is necessary if you're providing data
 230          * through an input callback AND you want the DefaultOutputUnit to do
 231          * any format conversions necessary from your format to the device's
 232          * format.
 233          */
 234         format.mFormatID = kAudioFormatLinearPCM;
 235         format.mFramesPerPacket = 1;
 236         format.mSampleRate = powd->sample_rate;
 237         /* flags specific to each format */
 238         format.mFormatFlags = kLinearPCMFormatFlagIsFloat
 239                 | kLinearPCMFormatFlagIsPacked
 240                 | ENDIAN_FLAGS;
 241         switch (powd->sample_format) {
 242         case SF_S8:
 243         case SF_U8:
 244                 wn->min_iqs = powd->channels;
 245                 break;
 246         default:
 247                 wn->min_iqs = powd->channels * 2;
 248         }
 249         format.mBitsPerChannel = 8 * sizeof(float);
 250         format.mBytesPerPacket = powd->channels * sizeof(float);
 251         format.mBytesPerFrame = format.mBytesPerPacket;
 252         format.mChannelsPerFrame = powd->channels;
 253
 254         ret = -E_STREAM_FORMAT;
 255         if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
 256                         kAudioUnitScope_Input, 0, &format,
 257                         sizeof(AudioStreamBasicDescription)))
 258                 goto e2;
 259         ret = -E_ADD_CALLBACK;
 260         if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
 261                         kAudioUnitScope_Input, 0, &inputCallback,
 262                         sizeof(inputCallback)) < 0)
 263                 goto e3;
 264         return 1;
 265 e3:
 266         destroy_buffers(powd);
 267 e2:
 268         AudioUnitUninitialize(powd->audio_unit);
 269 e1:
 270         CloseComponent(powd->audio_unit);
 271 e0:
 272         free(powd);
 273         wn->private_data = NULL;
 274         return ret;
 275 }
 276
 277 __malloc static void *osx_write_parse_config_or_die(const char *options)
 278 {
 279         struct osx_write_args_info *conf = para_calloc(sizeof(*conf));
 280
 281         /* exits on errors */
 282         osx_cmdline_parser_string(options, conf, "osx_write");
 283         return conf;
 284 }
 285
 286 static void osx_free_config(void *conf)
 287 {
 288         osx_cmdline_parser_free(conf);
 289 }
 290
 291 static void osx_write_close(struct writer_node *wn)
 292 {
 293         struct private_osx_write_data *powd = wn->private_data;
 294
 295         if (!powd)
 296                 return;
 297         PARA_INFO_LOG("closing writer node %p\n", wn);
 298         AudioOutputUnitStop(powd->audio_unit);
 299         AudioUnitUninitialize(powd->audio_unit);
 300         CloseComponent(powd->audio_unit);
 301         destroy_buffers(powd);
 302         free(powd);
 303 }
 304
 305 static void osx_write_post_select(__a_unused struct sched *s, struct task *t)
 306 {
 307         struct writer_node *wn = container_of(t, struct writer_node, task);
 308         struct private_osx_write_data *powd = wn->private_data;
 309         struct btr_node *btrn = wn->btrn;
 310         char *data;
 311         size_t bytes;
 312         int ret = 0;
 313
 314         while (!powd || powd->to->remaining <= 0) {
 315                 ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
 316                 if (ret <= 0)
 317                         break;
 318                 if (!powd) {
 319                         ret = core_audio_init(wn);
 320                         if (ret < 0)
 321                                 break;
 322                         powd = wn->private_data;
 323                 }
 324                 btr_merge(btrn, 8192);
 325                 bytes = btr_next_buffer(btrn, &data);
 326                 //PARA_CRIT_LOG("have: %zu\n", bytes);
 327                 fill_buffer(powd, data, bytes);
 328                 btr_consume(btrn, bytes);
 329                 if (!powd->play) {
 330                         ret = -E_UNIT_START;
 331                         if (AudioOutputUnitStart(powd->audio_unit))
 332                                 break;
 333                         powd->play = 1;
 334                 }
 335                 powd->to = powd->to->next;
 336         }
 337         if (ret < 0 && (!powd || powd->from->remaining <= 0)) {
 338                 btr_remove_node(btrn);
 339                 t->error = ret;
 340         }
 341 }
 342
 343 static void osx_write_pre_select(struct sched *s, struct task *t)
 344 {
 345         struct writer_node *wn = container_of(t, struct writer_node, task);
 346         struct private_osx_write_data *powd = wn->private_data;
 347         struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
 348         unsigned long factor;
 349         size_t numbytes;
 350         int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
 351
 352         if (ret == 0)
 353                 return;
 354         if (ret < 0 || !powd)
 355                 return sched_min_delay(s);
 356         assert(powd->sample_rate > 0);
 357         assert(wn->min_iqs > 0);
 358         numbytes = powd->to->remaining * sizeof(short);
 359         factor = numbytes / powd->sample_rate / wn->min_iqs;
 360         tv_scale(factor, &tmp, &delay);
 361         sched_request_timeout(&delay, s);
 362 }
 363
 364 /** the init function of the osx writer */
 365 void osx_write_init(struct writer *w)
 366 {
 367         struct osx_write_args_info dummy;
 368
 369         osx_cmdline_parser_init(&dummy);
 370         w->close = osx_write_close;
 371         w->pre_select = osx_write_pre_select;
 372         w->post_select = osx_write_post_select;
 373         w->parse_config_or_die = osx_write_parse_config_or_die;
 374         w->free_config = osx_free_config;
 375         w->shutdown = NULL; /* nothing to do */
 376         w->help = (struct ggo_help) {
 377                 .short_help = osx_write_args_info_help,
 378                 .detailed_help = osx_write_args_info_detailed_help
 379         };
 380         osx_cmdline_parser_free(&dummy);
 381 }