Changeset 7b5e1a5 for src/io/sink_apple_audio.c

Timestamp:

Dec 19, 2018, 2:24:41 PM (6 years ago)

Author:

Paul Brossier <piem@piem.org>

Branches:

feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/timestretch, fix/ffmpeg5, master

Children:

387b605, dbad82c

Parents:

ff6d1b6

Message:

[io] sink_apple_audio to use native format conversion

The important trick here is setting mDataByteSize to the actual number
of frames to be written, as mentionned by James McCartney? in [0].

[0]:​https://www.mail-archive.com/coreaudio-api@lists.apple.com/msg01109.html

File:

• src/io/sink_apple_audio.c (modified) (9 diffs)

src/io/sink_apple_audio.c

@@ -32 +32 @@
 #include <AudioToolbox/AudioToolbox.h>
 
-#define FLOAT_TO_SHORT(x) (short)(x * 32768)
-
-extern int createAubioBufferList(AudioBufferList *bufferList, int channels, int segmentSize);
+extern int createAudioBufferList(AudioBufferList *bufferList, int channels, int segmentSize);
 extern void freeAudioBufferList(AudioBufferList *bufferList);
 extern CFURLRef createURLFromPath(const char * path);
@@ -77 +75 @@
     return s;
   }
+
   // invalid samplerate given, abort
   if (aubio_io_validate_samplerate("sink_apple_audio", s->path, samplerate)) {
@@ -151 +150 @@
   CFURLRef fileURL = createURLFromPath(s->path);
   bool overwrite = true;
+
+  // set the in-memory format
+  AudioStreamBasicDescription inputFormat;
+  memset(&inputFormat, 0, sizeof(AudioStreamBasicDescription));
+  inputFormat.mFormatID         = kAudioFormatLinearPCM;
+  inputFormat.mSampleRate       = (Float64)(s->samplerate);
+  inputFormat.mFormatFlags      = kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked;
+  inputFormat.mChannelsPerFrame = s->channels;
+  inputFormat.mBitsPerChannel   = sizeof(smpl_t) * 8;
+  inputFormat.mFramesPerPacket  = 1;
+  inputFormat.mBytesPerFrame    = inputFormat.mBitsPerChannel * inputFormat.mChannelsPerFrame / 8;
+  inputFormat.mBytesPerPacket   = inputFormat.mFramesPerPacket * inputFormat.mBytesPerFrame;
   OSStatus err = noErr;
   err = ExtAudioFileCreateWithURL(fileURL, fileType, &clientFormat, NULL,
@@ -162 +173 @@
     goto beach;
   }
-  if (createAubioBufferList(&s->bufferList, s->channels, s->max_frames * s->channels)) {
+
+  err = ExtAudioFileSetProperty(s->audioFile,
+      kExtAudioFileProperty_ClientDataFormat,
+      sizeof(AudioStreamBasicDescription), &inputFormat);
+  if (err) {
+    char_t errorstr[20];
+    AUBIO_ERR("sink_apple_audio: error when trying to set output format on %s "
+        "(%s)\n", s->path, getPrintableOSStatusError(errorstr, err));
+    goto beach;
+  }
+
+  if (createAudioBufferList(&s->bufferList, s->channels, s->max_frames * s->channels)) {
     AUBIO_ERR("sink_apple_audio: error when creating buffer list for %s, "
         "out of memory? \n", s->path);
@@ -175 +197 @@
 void aubio_sink_apple_audio_do(aubio_sink_apple_audio_t * s, fvec_t * write_data, uint_t write) {
   UInt32 c, v;
-  short *data = (short*)s->bufferList.mBuffers[0].mData;
+  smpl_t *data = (smpl_t*)s->bufferList.mBuffers[0].mData;
   uint_t length = aubio_sink_validate_input_length("sink_apple_audio", s->path,
       s->max_frames, write_data->length, write);
@@ -181 +203 @@
   for (c = 0; c < s->channels; c++) {
     for (v = 0; v < length; v++) {
-      data[v * s->channels + c] = FLOAT_TO_SHORT(write_data->data[v]);
+      data[v * s->channels + c] = write_data->data[v];
     }
   }
@@ -190 +212 @@
 void aubio_sink_apple_audio_do_multi(aubio_sink_apple_audio_t * s, fmat_t * write_data, uint_t write) {
   UInt32 c, v;
-  short *data = (short*)s->bufferList.mBuffers[0].mData;
+  smpl_t *data = (smpl_t*)s->bufferList.mBuffers[0].mData;
   uint_t channels = aubio_sink_validate_input_channels("sink_apple_audio",
       s->path, s->channels, write_data->height);
@@ -198 +220 @@
   for (c = 0; c < channels; c++) {
     for (v = 0; v < length; v++) {
-      data[v * s->channels + c] = FLOAT_TO_SHORT(write_data->data[c][v]);
+      data[v * s->channels + c] = write_data->data[c][v];
     }
   }
@@ -207 +229 @@
 void aubio_sink_apple_audio_write(aubio_sink_apple_audio_t *s, uint_t write) {
   OSStatus err = noErr;
+  // set mDataByteSize to match the number of frames to be written
+  // see https://www.mail-archive.com/coreaudio-api@lists.apple.com/msg01109.html
+  s->bufferList.mBuffers[0].mDataByteSize = write * s->channels
+    * sizeof(smpl_t);
   if (s->async) {
     err = ExtAudioFileWriteAsync(s->audioFile, write, &s->bufferList);