From 857d5a20a956ef61b64ae07b018ecc2f1eb0a503 Mon Sep 17 00:00:00 2001 From: Andy Hung Date: Thu, 26 Mar 2015 18:46:00 -0700 Subject: Factor out buffer provider code from AudioMixer In preparation for playback rate support and timestretching. Bug: 19196501 Change-Id: I435accb852d32110dd0b3a9917488522c567ba80 --- services/audioflinger/BufferProviders.cpp | 362 ++++++++++++++++++++++++++++++ 1 file changed, 362 insertions(+) create mode 100644 services/audioflinger/BufferProviders.cpp (limited to 'services/audioflinger/BufferProviders.cpp') diff --git a/services/audioflinger/BufferProviders.cpp b/services/audioflinger/BufferProviders.cpp new file mode 100644 index 0000000..e143805 --- /dev/null +++ b/services/audioflinger/BufferProviders.cpp @@ -0,0 +1,362 @@ +/* + * Copyright (C) 2015 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "BufferProvider" +//#define LOG_NDEBUG 0 + +#include +#include +#include +#include +#include + +#include "Configuration.h" +#include "BufferProviders.h" + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0])) +#endif + +namespace android { + +// ---------------------------------------------------------------------------- + +template +static inline T min(const T& a, const T& b) +{ + return a < b ? a : b; +} + +CopyBufferProvider::CopyBufferProvider(size_t inputFrameSize, + size_t outputFrameSize, size_t bufferFrameCount) : + mInputFrameSize(inputFrameSize), + mOutputFrameSize(outputFrameSize), + mLocalBufferFrameCount(bufferFrameCount), + mLocalBufferData(NULL), + mConsumed(0) +{ + ALOGV("CopyBufferProvider(%p)(%zu, %zu, %zu)", this, + inputFrameSize, outputFrameSize, bufferFrameCount); + LOG_ALWAYS_FATAL_IF(inputFrameSize < outputFrameSize && bufferFrameCount == 0, + "Requires local buffer if inputFrameSize(%zu) < outputFrameSize(%zu)", + inputFrameSize, outputFrameSize); + if (mLocalBufferFrameCount) { + (void)posix_memalign(&mLocalBufferData, 32, mLocalBufferFrameCount * mOutputFrameSize); + } + mBuffer.frameCount = 0; +} + +CopyBufferProvider::~CopyBufferProvider() +{ + ALOGV("~CopyBufferProvider(%p)", this); + if (mBuffer.frameCount != 0) { + mTrackBufferProvider->releaseBuffer(&mBuffer); + } + free(mLocalBufferData); +} + +status_t CopyBufferProvider::getNextBuffer(AudioBufferProvider::Buffer *pBuffer, + int64_t pts) +{ + //ALOGV("CopyBufferProvider(%p)::getNextBuffer(%p (%zu), %lld)", + // this, pBuffer, pBuffer->frameCount, pts); + if (mLocalBufferFrameCount == 0) { + status_t res = mTrackBufferProvider->getNextBuffer(pBuffer, pts); + if (res == OK) { + copyFrames(pBuffer->raw, pBuffer->raw, pBuffer->frameCount); + } + return res; + } + if (mBuffer.frameCount == 0) { + mBuffer.frameCount = pBuffer->frameCount; + status_t res = mTrackBufferProvider->getNextBuffer(&mBuffer, pts); + // At one time an upstream buffer provider had + // res == OK and mBuffer.frameCount == 0, doesn't seem to happen now 7/18/2014. + // + // By API spec, if res != OK, then mBuffer.frameCount == 0. + // but there may be improper implementations. + ALOG_ASSERT(res == OK || mBuffer.frameCount == 0); + if (res != OK || mBuffer.frameCount == 0) { // not needed by API spec, but to be safe. + pBuffer->raw = NULL; + pBuffer->frameCount = 0; + return res; + } + mConsumed = 0; + } + ALOG_ASSERT(mConsumed < mBuffer.frameCount); + size_t count = min(mLocalBufferFrameCount, mBuffer.frameCount - mConsumed); + count = min(count, pBuffer->frameCount); + pBuffer->raw = mLocalBufferData; + pBuffer->frameCount = count; + copyFrames(pBuffer->raw, (uint8_t*)mBuffer.raw + mConsumed * mInputFrameSize, + pBuffer->frameCount); + return OK; +} + +void CopyBufferProvider::releaseBuffer(AudioBufferProvider::Buffer *pBuffer) +{ + //ALOGV("CopyBufferProvider(%p)::releaseBuffer(%p(%zu))", + // this, pBuffer, pBuffer->frameCount); + if (mLocalBufferFrameCount == 0) { + mTrackBufferProvider->releaseBuffer(pBuffer); + return; + } + // LOG_ALWAYS_FATAL_IF(pBuffer->frameCount == 0, "Invalid framecount"); + mConsumed += pBuffer->frameCount; // TODO: update for efficiency to reuse existing content + if (mConsumed != 0 && mConsumed >= mBuffer.frameCount) { + mTrackBufferProvider->releaseBuffer(&mBuffer); + ALOG_ASSERT(mBuffer.frameCount == 0); + } + pBuffer->raw = NULL; + pBuffer->frameCount = 0; +} + +void CopyBufferProvider::reset() +{ + if (mBuffer.frameCount != 0) { + mTrackBufferProvider->releaseBuffer(&mBuffer); + } + mConsumed = 0; +} + +DownmixerBufferProvider::DownmixerBufferProvider( + audio_channel_mask_t inputChannelMask, + audio_channel_mask_t outputChannelMask, audio_format_t format, + uint32_t sampleRate, int32_t sessionId, size_t bufferFrameCount) : + CopyBufferProvider( + audio_bytes_per_sample(format) * audio_channel_count_from_out_mask(inputChannelMask), + audio_bytes_per_sample(format) * audio_channel_count_from_out_mask(outputChannelMask), + bufferFrameCount) // set bufferFrameCount to 0 to do in-place +{ + ALOGV("DownmixerBufferProvider(%p)(%#x, %#x, %#x %u %d)", + this, inputChannelMask, outputChannelMask, format, + sampleRate, sessionId); + if (!sIsMultichannelCapable + || EffectCreate(&sDwnmFxDesc.uuid, + sessionId, + SESSION_ID_INVALID_AND_IGNORED, + &mDownmixHandle) != 0) { + ALOGE("DownmixerBufferProvider() error creating downmixer effect"); + mDownmixHandle = NULL; + return; + } + // channel input configuration will be overridden per-track + mDownmixConfig.inputCfg.channels = inputChannelMask; // FIXME: Should be bits + mDownmixConfig.outputCfg.channels = outputChannelMask; // FIXME: should be bits + mDownmixConfig.inputCfg.format = format; + mDownmixConfig.outputCfg.format = format; + mDownmixConfig.inputCfg.samplingRate = sampleRate; + mDownmixConfig.outputCfg.samplingRate = sampleRate; + mDownmixConfig.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ; + mDownmixConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_WRITE; + // input and output buffer provider, and frame count will not be used as the downmix effect + // process() function is called directly (see DownmixerBufferProvider::getNextBuffer()) + mDownmixConfig.inputCfg.mask = EFFECT_CONFIG_SMP_RATE | EFFECT_CONFIG_CHANNELS | + EFFECT_CONFIG_FORMAT | EFFECT_CONFIG_ACC_MODE; + mDownmixConfig.outputCfg.mask = mDownmixConfig.inputCfg.mask; + + int cmdStatus; + uint32_t replySize = sizeof(int); + + // Configure downmixer + status_t status = (*mDownmixHandle)->command(mDownmixHandle, + EFFECT_CMD_SET_CONFIG /*cmdCode*/, sizeof(effect_config_t) /*cmdSize*/, + &mDownmixConfig /*pCmdData*/, + &replySize, &cmdStatus /*pReplyData*/); + if (status != 0 || cmdStatus != 0) { + ALOGE("DownmixerBufferProvider() error %d cmdStatus %d while configuring downmixer", + status, cmdStatus); + EffectRelease(mDownmixHandle); + mDownmixHandle = NULL; + return; + } + + // Enable downmixer + replySize = sizeof(int); + status = (*mDownmixHandle)->command(mDownmixHandle, + EFFECT_CMD_ENABLE /*cmdCode*/, 0 /*cmdSize*/, NULL /*pCmdData*/, + &replySize, &cmdStatus /*pReplyData*/); + if (status != 0 || cmdStatus != 0) { + ALOGE("DownmixerBufferProvider() error %d cmdStatus %d while enabling downmixer", + status, cmdStatus); + EffectRelease(mDownmixHandle); + mDownmixHandle = NULL; + return; + } + + // Set downmix type + // parameter size rounded for padding on 32bit boundary + const int psizePadded = ((sizeof(downmix_params_t) - 1)/sizeof(int) + 1) * sizeof(int); + const int downmixParamSize = + sizeof(effect_param_t) + psizePadded + sizeof(downmix_type_t); + effect_param_t * const param = (effect_param_t *) malloc(downmixParamSize); + param->psize = sizeof(downmix_params_t); + const downmix_params_t downmixParam = DOWNMIX_PARAM_TYPE; + memcpy(param->data, &downmixParam, param->psize); + const downmix_type_t downmixType = DOWNMIX_TYPE_FOLD; + param->vsize = sizeof(downmix_type_t); + memcpy(param->data + psizePadded, &downmixType, param->vsize); + replySize = sizeof(int); + status = (*mDownmixHandle)->command(mDownmixHandle, + EFFECT_CMD_SET_PARAM /* cmdCode */, downmixParamSize /* cmdSize */, + param /*pCmdData*/, &replySize, &cmdStatus /*pReplyData*/); + free(param); + if (status != 0 || cmdStatus != 0) { + ALOGE("DownmixerBufferProvider() error %d cmdStatus %d while setting downmix type", + status, cmdStatus); + EffectRelease(mDownmixHandle); + mDownmixHandle = NULL; + return; + } + ALOGV("DownmixerBufferProvider() downmix type set to %d", (int) downmixType); +} + +DownmixerBufferProvider::~DownmixerBufferProvider() +{ + ALOGV("~DownmixerBufferProvider (%p)", this); + EffectRelease(mDownmixHandle); + mDownmixHandle = NULL; +} + +void DownmixerBufferProvider::copyFrames(void *dst, const void *src, size_t frames) +{ + mDownmixConfig.inputCfg.buffer.frameCount = frames; + mDownmixConfig.inputCfg.buffer.raw = const_cast(src); + mDownmixConfig.outputCfg.buffer.frameCount = frames; + mDownmixConfig.outputCfg.buffer.raw = dst; + // may be in-place if src == dst. + status_t res = (*mDownmixHandle)->process(mDownmixHandle, + &mDownmixConfig.inputCfg.buffer, &mDownmixConfig.outputCfg.buffer); + ALOGE_IF(res != OK, "DownmixBufferProvider error %d", res); +} + +/* call once in a pthread_once handler. */ +/*static*/ status_t DownmixerBufferProvider::init() +{ + // find multichannel downmix effect if we have to play multichannel content + uint32_t numEffects = 0; + int ret = EffectQueryNumberEffects(&numEffects); + if (ret != 0) { + ALOGE("AudioMixer() error %d querying number of effects", ret); + return NO_INIT; + } + ALOGV("EffectQueryNumberEffects() numEffects=%d", numEffects); + + for (uint32_t i = 0 ; i < numEffects ; i++) { + if (EffectQueryEffect(i, &sDwnmFxDesc) == 0) { + ALOGV("effect %d is called %s", i, sDwnmFxDesc.name); + if (memcmp(&sDwnmFxDesc.type, EFFECT_UIID_DOWNMIX, sizeof(effect_uuid_t)) == 0) { + ALOGI("found effect \"%s\" from %s", + sDwnmFxDesc.name, sDwnmFxDesc.implementor); + sIsMultichannelCapable = true; + break; + } + } + } + ALOGW_IF(!sIsMultichannelCapable, "unable to find downmix effect"); + return NO_INIT; +} + +/*static*/ bool DownmixerBufferProvider::sIsMultichannelCapable = false; +/*static*/ effect_descriptor_t DownmixerBufferProvider::sDwnmFxDesc; + +RemixBufferProvider::RemixBufferProvider(audio_channel_mask_t inputChannelMask, + audio_channel_mask_t outputChannelMask, audio_format_t format, + size_t bufferFrameCount) : + CopyBufferProvider( + audio_bytes_per_sample(format) + * audio_channel_count_from_out_mask(inputChannelMask), + audio_bytes_per_sample(format) + * audio_channel_count_from_out_mask(outputChannelMask), + bufferFrameCount), + mFormat(format), + mSampleSize(audio_bytes_per_sample(format)), + mInputChannels(audio_channel_count_from_out_mask(inputChannelMask)), + mOutputChannels(audio_channel_count_from_out_mask(outputChannelMask)) +{ + ALOGV("RemixBufferProvider(%p)(%#x, %#x, %#x) %zu %zu", + this, format, inputChannelMask, outputChannelMask, + mInputChannels, mOutputChannels); + + const audio_channel_representation_t inputRepresentation = + audio_channel_mask_get_representation(inputChannelMask); + const audio_channel_representation_t outputRepresentation = + audio_channel_mask_get_representation(outputChannelMask); + const uint32_t inputBits = audio_channel_mask_get_bits(inputChannelMask); + const uint32_t outputBits = audio_channel_mask_get_bits(outputChannelMask); + + switch (inputRepresentation) { + case AUDIO_CHANNEL_REPRESENTATION_POSITION: + switch (outputRepresentation) { + case AUDIO_CHANNEL_REPRESENTATION_POSITION: + memcpy_by_index_array_initialization(mIdxAry, ARRAY_SIZE(mIdxAry), + outputBits, inputBits); + return; + case AUDIO_CHANNEL_REPRESENTATION_INDEX: + // TODO: output channel index mask not currently allowed + // fall through + default: + break; + } + break; + case AUDIO_CHANNEL_REPRESENTATION_INDEX: + switch (outputRepresentation) { + case AUDIO_CHANNEL_REPRESENTATION_POSITION: + memcpy_by_index_array_initialization_src_index(mIdxAry, ARRAY_SIZE(mIdxAry), + outputBits, inputBits); + return; + case AUDIO_CHANNEL_REPRESENTATION_INDEX: + // TODO: output channel index mask not currently allowed + // fall through + default: + break; + } + break; + default: + break; + } + LOG_ALWAYS_FATAL("invalid channel mask conversion from %#x to %#x", + inputChannelMask, outputChannelMask); +} + +void RemixBufferProvider::copyFrames(void *dst, const void *src, size_t frames) +{ + memcpy_by_index_array(dst, mOutputChannels, + src, mInputChannels, mIdxAry, mSampleSize, frames); +} + +ReformatBufferProvider::ReformatBufferProvider(int32_t channelCount, + audio_format_t inputFormat, audio_format_t outputFormat, + size_t bufferFrameCount) : + CopyBufferProvider( + channelCount * audio_bytes_per_sample(inputFormat), + channelCount * audio_bytes_per_sample(outputFormat), + bufferFrameCount), + mChannelCount(channelCount), + mInputFormat(inputFormat), + mOutputFormat(outputFormat) +{ + ALOGV("ReformatBufferProvider(%p)(%u, %#x, %#x)", + this, channelCount, inputFormat, outputFormat); +} + +void ReformatBufferProvider::copyFrames(void *dst, const void *src, size_t frames) +{ + memcpy_by_audio_format(dst, mOutputFormat, src, mInputFormat, frames * mChannelCount); +} + +// ---------------------------------------------------------------------------- +} // namespace android -- cgit v1.1