Implement renderer AudioDevice API for low-latency audio output...

media/audio/audio_util.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_AUDIO_UTIL_H_
 #define MEDIA_AUDIO_AUDIO_UTIL_H_
 
+#include <vector>
+
 #include "base/basictypes.h"
 
 namespace media {
 
 // For all audio functions 3 audio formats are supported:
 // 8 bits unsigned 0 to 255.
 // 16 bit signed (little endian).
 // 32 bit signed (little endian)
 
 // AdjustVolume() does a software volume adjustment of a sample buffer.
@@ skipping 37 matching lines @@
 // puts it in the floating point |destination|.
 // It returns |true| on success, or |false| if the |sample_fmt| is
 // not recognized.
 bool DeinterleaveAudioChannel(void* source,
                               float* destination,
                               int channels,
                               int channel_index,
                               int bytes_per_sample,
                               size_t number_of_frames);
 
+// InterleaveFloatToInt16 scales, clips, and interleaves the planar
+// floating-point audio contained in |source| to the int16 |destination|.
+// The floating-point data is in a canonical range of -1.0 -> +1.0.
+// The size of the |source| vector determines the number of channels.
+// The |destination| buffer is assumed to be large enough to hold the
+// result. Thus it must be at least size: number_of_frames * source.size()
+void InterleaveFloatToInt16(std::vector<float*> source,

[scherkus (not reviewing), 2011/01/12 03:11:43]

can source be const ref?
const std::vector<float*>& source

[Chris Rogers, 2011/01/12 21:26:10]

Yes, of course! --- FIXED

On 2011/01/12 03:11:43, scherkus wrote:

+                            int16* destination,
+                            size_t number_of_frames);
+
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_UTIL_H_