diff options
Diffstat (limited to 'media/cast/test/utility/audio_utility.h')
| -rw-r--r-- | media/cast/test/utility/audio_utility.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/media/cast/test/utility/audio_utility.h b/media/cast/test/utility/audio_utility.h index ea90e9c..7cc9b7d 100644 --- a/media/cast/test/utility/audio_utility.h +++ b/media/cast/test/utility/audio_utility.h @@ -58,6 +58,22 @@ scoped_ptr<PcmAudioFrame> ToPcmAudioFrame(const AudioBus& audio_bus, // zero. int CountZeroCrossings(const std::vector<int16>& samples); +// Encode |timestamp| into the samples pointed to by 'samples' in a way +// that should be decodable even after compressing/decompressing the audio. +// Assumes 48Khz sampling rate and needs at least 240 samples. Returns +// false if |samples| is too small. If more than 240 samples are available, +// then the timestamp will be repeated. |sample_offset| should contain how +// many samples has been encoded so far, so that we can make smooth +// transitions between encoded chunks. +// See audio_utility.cc for details on how the encoding is done. +bool EncodeTimestamp(uint16 timestamp, + size_t sample_offset, + std::vector<int16>* samples); + +// Decode a timestamp encoded with EncodeTimestamp. Returns true if a +// timestamp was found in |samples|. +bool DecodeTimestamp(const std::vector<int16>& samples, uint16* timestamp); + } // namespace cast } // namespace media |