Changeset fe3e320 for src/io/source_apple_audio.c

Timestamp:

Aug 24, 2014, 7:24:09 PM (10 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/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+

Children:

3a1a5d6

Parents:

810f975

git-author:

Paul Brossier <piem@piem.org> (08/22/14 17:36:25)

git-committer:

Paul Brossier <piem@piem.org> (08/24/14 19:24:09)

Message:

src/io/source_apple_audio.c: check out of bounds _seek

File:

• src/io/source_apple_audio.c (modified) (2 diffs)

src/io/source_apple_audio.c

@@ -299 +299 @@
 
 uint_t aubio_source_apple_audio_seek (aubio_source_apple_audio_t * s, uint_t pos) {
+  OSStatus err = noErr;
+  if ((sint_t)pos < 0) {
+    AUBIO_ERROR("source_apple_audio: error while seeking in %s "
+        "(can not seek at negative position %d)\n",
+        s->path, pos);
+    err = -1;
+    goto beach;
+  }
+  // check if we are not seeking out of the file
+  SInt64 fileLengthFrames = 0;
+  UInt32 propSize = sizeof(fileLengthFrames);
+  ExtAudioFileGetProperty(s->audioFile,
+      kExtAudioFileProperty_FileLengthFrames, &propSize, &fileLengthFrames);
+  // compute position in the source file, before resampling
+  smpl_t ratio = s->source_samplerate * 1. / s->samplerate;
+  SInt64 resampled_pos = (SInt64)ROUND( pos * ratio );
+  if (resampled_pos > fileLengthFrames) {
+    AUBIO_ERR("source_apple_audio: trying to seek in %s at pos %d, "
+        "but file has only %d frames\n",
+        s->path, pos, (uint_t)(fileLengthFrames / ratio));
+    err = -1;
+    goto beach;
+  }
   // after a short read, the bufferList size needs to resetted to prepare for a full read
   AudioBufferList *bufferList = &s->bufferList;
   bufferList->mBuffers[0].mDataByteSize = s->block_size * s->channels * sizeof (short);
-  // compute position in the source file, before resampling
-  smpl_t ratio = s->source_samplerate * 1. / s->samplerate;
-  SInt64 resampled_pos = (SInt64)ROUND( pos * ratio );
-  OSStatus err = ExtAudioFileSeek(s->audioFile, resampled_pos);
+  // do the actual seek
+  err = ExtAudioFileSeek(s->audioFile, resampled_pos);
   if (err) {
     char_t errorstr[20];
@@ -312 +333 @@
         getPrintableOSStatusError(errorstr, err));
   }
+#if 0
+  // check position after seek
+  {
+    SInt64 outFrameOffset = 0;
+    err = ExtAudioFileTell(s->audioFile, &outFrameOffset);
+    if (err) {
+      char_t errorstr[20];
+      AUBIO_ERROR("source_apple_audio: error while seeking %s at %d "
+          "in ExtAudioFileTell (%s)\n", s->path, pos,
+          getPrintableOSStatusError(errorstr, err));
+    }
+    AUBIO_DBG("source_apple_audio: asked seek at %d, tell got %d\n",
+        pos, (uint_t)(outFrameOffset / ratio + .5));
+  }
+#endif
+beach:
   return err;
 }