audio_bus.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/audio_bus.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <limits> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_parameters.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/limits.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static bool IsAligned(void* ptr) { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (reinterpret_cast<uintptr_t>(ptr) & 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (AudioBus::kChannelAlignment - 1)) == 0U; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Calculates the required size for an AudioBus with the given params, sets 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |aligned_frames| to the actual frame length of each channel array. 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int CalculateMemorySizeInternal(int channels, int frames, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* out_aligned_frames) { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Choose a size such that each channel will be aligned by 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // kChannelAlignment when stored in a contiguous block. 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ((frames * sizeof(float) + AudioBus::kChannelAlignment - 1) & 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~(AudioBus::kChannelAlignment - 1)) / sizeof(float); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (out_aligned_frames) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *out_aligned_frames = aligned_frames; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return sizeof(float) * channels * aligned_frames; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |Format| is the destination type, |Fixed| is a type larger than |Format| 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// such that operations can be made without overflowing. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<class Format, class Fixed> 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void FromInterleavedInternal(const void* src, int start_frame, 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames, AudioBus* dest) { 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Format* source = static_cast<const Format*>(src); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Fixed kBias = std::numeric_limits<Format>::is_signed ? 0 : 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::numeric_limits<Format>::max() / 2 + 1; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const float kMaxScale = 1.0f / (kBias ? kBias - 1 : 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::numeric_limits<Format>::max()); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const float kMinScale = 1.0f / (kBias ? kBias : 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) -static_cast<Fixed>(std::numeric_limits<Format>::min())); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int channels = dest->channels(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int ch = 0; ch < channels; ++ch) { 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float* channel_data = dest->channel(ch); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = start_frame, offset = ch; i < start_frame + frames; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++i, offset += channels) { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Fixed v = static_cast<Fixed>(source[offset]) - kBias; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data[i] = v * (v < 0 ? kMinScale : kMaxScale); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |Format| is the destination type, |Fixed| is a type larger than |Format| 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// such that operations can be made without overflowing. 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<class Format, class Fixed> 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static void ToInterleavedInternal(const AudioBus* source, int start_frame, 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int frames, void* dst) { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Format* dest = static_cast<Format*>(dst); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Format kBias = std::numeric_limits<Format>::is_signed ? 0 : 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::numeric_limits<Format>::max() / 2 + 1; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Fixed kMaxValue = kBias ? kBias - 1 : 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::numeric_limits<Format>::max(); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const Fixed kMinValue = kBias ? -kBias : 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::numeric_limits<Format>::min(); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int channels = source->channels(); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int ch = 0; ch < channels; ++ch) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const float* channel_data = source->channel(ch); 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (int i = start_frame, offset = ch; i < start_frame + frames; 792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++i, offset += channels) { 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float v = channel_data[i]; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Fixed sample = v * (v < 0 ? -kMinValue : kMaxValue); 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (sample > kMaxValue) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sample = kMaxValue; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else if (sample < kMinValue) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sample = kMinValue; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dest[offset] = static_cast<Format>(sample) + kBias; 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static void ValidateConfig(size_t channels, int frames) { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(frames, 0); 952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK_LE(channels, static_cast<size_t>(limits::kMaxChannels)); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void CheckOverflow(int start_frame, int frames, int total_frames) { 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(start_frame, 0); 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(frames, 0); 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(total_frames, 0); 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sum = start_frame + frames; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LE(sum, total_frames); 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(sum, 0); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels, int frames) 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : frames_(frames), 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channels, frames_); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 0; 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int size = CalculateMemorySizeInternal(channels, frames, &aligned_frames); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_.reset(static_cast<float*>(base::AlignedAlloc( 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size, AudioBus::kChannelAlignment))); 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BuildChannelData(channels, aligned_frames, data_.get()); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels, int frames, float* data) 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : frames_(frames), 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Since |data| may have come from an external source, ensure it's valid. 1252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK(data); 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channels, frames_); 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 0; 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CalculateMemorySizeInternal(channels, frames, &aligned_frames); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BuildChannelData(channels, aligned_frames, data); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int frames, const std::vector<float*>& channel_data) 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : channel_data_(channel_data), 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_(frames), 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channel_data_.size(), frames_); 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Sanity check wrapped vector for alignment and channel count. 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(channel_data_[i])); 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels) 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : channel_data_(channels), 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_(0), 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(true) { 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_[i] = NULL; 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::~AudioBus() {} 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::Create(int channels, int frames) { 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(channels, frames)); 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::Create(const AudioParameters& params) { 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus( 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params.channels(), params.frames_per_buffer())); 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::CreateWrapper(int channels) { 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(channels)); 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapVector( 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames, const std::vector<float*>& channel_data) { 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(frames, channel_data)); 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapMemory(int channels, int frames, 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* data) { 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |data| must be aligned by AudioBus::kChannelAlignment. 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(IsAligned(data)); 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus( 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channels, frames, static_cast<float*>(data))); 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapMemory(const AudioParameters& params, 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* data) { 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |data| must be aligned by AudioBus::kChannelAlignment. 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(IsAligned(data)); 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus( 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params.channels(), params.frames_per_buffer(), 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<float*>(data))); 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::SetChannelData(int channel, float* data) { 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(can_set_channel_data_); 1922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK(data); 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(channel, 0); 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LT(static_cast<size_t>(channel), channel_data_.size()); 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(data)); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_[channel] = data; 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::set_frames(int frames) { 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(can_set_channel_data_); 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_ = frames; 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ZeroFramesPartial(int start_frame, int frames) { 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (frames <= 0) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) { 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(channel_data_[i] + start_frame, 0, 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames * sizeof(*channel_data_[i])); 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ZeroFrames(int frames) { 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(0, frames); 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::Zero() { 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFrames(frames_); 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioBus::CalculateMemorySize(const AudioParameters& params) { 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CalculateMemorySizeInternal( 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params.channels(), params.frames_per_buffer(), NULL); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioBus::CalculateMemorySize(int channels, int frames) { 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CalculateMemorySizeInternal(channels, frames, NULL); 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::BuildChannelData(int channels, int aligned_frames, float* data) { 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(data)); 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(channel_data_.size(), 0U); 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Separate audio data out into channels for easy lookup later. Figure out 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_.reserve(channels); 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < channels; ++i) 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_.push_back(data + i * aligned_frames); 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(dalecurtis): See if intrinsic optimizations help any here. 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::FromInterleavedPartial(const void* source, int start_frame, 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames, int bytes_per_sample) { 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (bytes_per_sample) { 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 1: 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FromInterleavedInternal<uint8, int16>(source, start_frame, frames, this); 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 2: 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FromInterleavedInternal<int16, int32>(source, start_frame, frames, this); 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 4: 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FromInterleavedInternal<int32, int64>(source, start_frame, frames, this); 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Unsupported bytes per sample encountered."; 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(start_frame, frames); 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Don't clear remaining frames if this is a partial deinterleave. 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!start_frame) { 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Zero any remaining frames. 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(frames, frames_ - frames); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::FromInterleaved(const void* source, int frames, 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int bytes_per_sample) { 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FromInterleavedPartial(source, 0, frames, bytes_per_sample); 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ToInterleaved(int frames, int bytes_per_sample, 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* dest) const { 2762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ToInterleavedPartial(0, frames, bytes_per_sample, dest); 2772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// TODO(dalecurtis): See if intrinsic optimizations help any here. 2802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioBus::ToInterleavedPartial(int start_frame, int frames, 2812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int bytes_per_sample, void* dest) const { 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (bytes_per_sample) { 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 1: 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ToInterleavedInternal<uint8, int16>(this, start_frame, frames, dest); 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 2: 2882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ToInterleavedInternal<int16, int32>(this, start_frame, frames, dest); 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 4: 2912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ToInterleavedInternal<int32, int64>(this, start_frame, frames, dest); 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Unsupported bytes per sample encountered."; 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(dest, 0, frames * bytes_per_sample); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::CopyTo(AudioBus* dest) const { 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_EQ(channels(), dest->channels()); 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_EQ(frames(), dest->frames()); 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Since we don't know if the other AudioBus is wrapped or not (and we don't 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // want to care), just copy using the public channel() accessors. 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < channels(); ++i) 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(dest->channel(i), channel(i), sizeof(*channel(i)) * frames()); 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 311