diff options
| -rw-r--r-- | include/media/AudioTrack.h | 5 | ||||
| -rw-r--r-- | media/libmedia/AudioTrack.cpp | 26 |
2 files changed, 22 insertions, 9 deletions
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h index 2c48bbf..79db323 100644 --- a/include/media/AudioTrack.h +++ b/include/media/AudioTrack.h @@ -154,8 +154,9 @@ public: * streamType: Select the type of audio stream this track is attached to * (e.g. AUDIO_STREAM_MUSIC). * sampleRate: Data source sampling rate in Hz. - * format: Audio format (e.g AUDIO_FORMAT_PCM_16_BIT for signed - * 16 bits per sample). + * format: Audio format. For mixed tracks, any PCM format supported by server is OK + * or AUDIO_FORMAT_PCM_8_BIT which is handled on client side. For direct + * and offloaded tracks, the possible format(s) depends on the output sink. * channelMask: Channel mask, such that audio_is_output_channel(channelMask) is true. * frameCount: Minimum size of track PCM buffer in frames. This defines the * application's contribution to the diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp index dc4f90e..aaaa3f1 100644 --- a/media/libmedia/AudioTrack.cpp +++ b/media/libmedia/AudioTrack.cpp @@ -315,12 +315,20 @@ status_t AudioTrack::set( flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER); } - if (audio_is_linear_pcm(format)) { - mFrameSize = channelCount * audio_bytes_per_sample(format); - mFrameSizeAF = channelCount * sizeof(int16_t); + if (flags & AUDIO_OUTPUT_FLAG_DIRECT) { + if (audio_is_linear_pcm(format)) { + mFrameSize = channelCount * audio_bytes_per_sample(format); + } else { + mFrameSize = sizeof(uint8_t); + } + mFrameSizeAF = mFrameSize; } else { - mFrameSize = sizeof(uint8_t); - mFrameSizeAF = sizeof(uint8_t); + ALOG_ASSERT(audio_is_linear_pcm(format)); + mFrameSize = channelCount * audio_bytes_per_sample(format); + mFrameSizeAF = channelCount * audio_bytes_per_sample( + format == AUDIO_FORMAT_PCM_8_BIT ? AUDIO_FORMAT_PCM_16_BIT : format); + // createTrack will return an error if PCM format is not supported by server, + // so no need to check for specific PCM formats here } // Make copy of input parameter offloadInfo so that in the future: @@ -931,7 +939,11 @@ status_t AudioTrack::createTrack_l(size_t epoch) // Ensure that buffer alignment matches channel count // 8-bit data in shared memory is not currently supported by AudioFlinger - size_t alignment = /* mFormat == AUDIO_FORMAT_PCM_8_BIT ? 1 : */ 2; + size_t alignment = audio_bytes_per_sample( + mFormat == AUDIO_FORMAT_PCM_8_BIT ? AUDIO_FORMAT_PCM_16_BIT : mFormat); + if (alignment & 1) { + alignment = 1; + } if (mChannelCount > 1) { // More than 2 channels does not require stronger alignment than stereo alignment <<= 1; @@ -947,7 +959,7 @@ status_t AudioTrack::createTrack_l(size_t epoch) // there's no frameCount parameter. // But when initializing a shared buffer AudioTrack via set(), // there _is_ a frameCount parameter. We silently ignore it. - frameCount = mSharedBuffer->size()/mChannelCount/sizeof(int16_t); + frameCount = mSharedBuffer->size() / mFrameSizeAF; } else if (!(mFlags & AUDIO_OUTPUT_FLAG_FAST)) { |