audio_bus.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371
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 "base/logging.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_parameters.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/limits.h" 10c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "media/base/vector_math.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 14c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)static const uint8 kUint8Bias = 128; 15c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static bool IsAligned(void* ptr) { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (reinterpret_cast<uintptr_t>(ptr) & 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (AudioBus::kChannelAlignment - 1)) == 0U; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Calculates the required size for an AudioBus with the given params, sets 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |aligned_frames| to the actual frame length of each channel array. 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int CalculateMemorySizeInternal(int channels, int frames, 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* out_aligned_frames) { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Choose a size such that each channel will be aligned by 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // kChannelAlignment when stored in a contiguous block. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ((frames * sizeof(float) + AudioBus::kChannelAlignment - 1) & 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~(AudioBus::kChannelAlignment - 1)) / sizeof(float); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (out_aligned_frames) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *out_aligned_frames = aligned_frames; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return sizeof(float) * channels * aligned_frames; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 37c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// |Format| is the destination type. If a bias is present, |Fixed| must be a 38c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// type larger than |Format| such that operations can be made without 39c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// overflowing. Without a bias |Fixed| must be the same as |Format|. 40c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<class Format, class Fixed, Format Bias> 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void FromInterleavedInternal(const void* src, int start_frame, 42c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) int frames, AudioBus* dest, 43c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) float min, float max) { 44c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) COMPILE_ASSERT((Bias == 0 && sizeof(Fixed) == sizeof(Format)) || 45c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) sizeof(Fixed) > sizeof(Format), invalid_deinterleave_types); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Format* source = static_cast<const Format*>(src); 47c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const int channels = dest->channels(); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int ch = 0; ch < channels; ++ch) { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float* channel_data = dest->channel(ch); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = start_frame, offset = ch; i < start_frame + frames; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ++i, offset += channels) { 52c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const Fixed v = static_cast<Fixed>(source[offset]) - Bias; 53c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) channel_data[i] = v * (v < 0 ? -min : max); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 58c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// |Format| is the destination type. If a bias is present, |Fixed| must be a 59c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// type larger than |Format| such that operations can be made without 60c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// overflowing. Without a bias |Fixed| must be the same as |Format|. 61c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<class Format, class Fixed, Format Bias> 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static void ToInterleavedInternal(const AudioBus* source, int start_frame, 63c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) int frames, void* dst, Fixed min, Fixed max) { 64c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) COMPILE_ASSERT((Bias == 0 && sizeof(Fixed) == sizeof(Format)) || 65c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) sizeof(Fixed) > sizeof(Format), invalid_interleave_types); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Format* dest = static_cast<Format*>(dst); 67c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const int channels = source->channels(); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int ch = 0; ch < channels; ++ch) { 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const float* channel_data = source->channel(ch); 702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (int i = start_frame, offset = ch; i < start_frame + frames; 712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++i, offset += channels) { 72c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const float v = channel_data[i]; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 74c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) Fixed sample; 75c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (v < 0) 76c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) sample = v <= -1 ? min : static_cast<Fixed>(-v * min); 77c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) else 78c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) sample = v >= 1 ? max : static_cast<Fixed>(v * max); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 80c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) dest[offset] = static_cast<Format>(sample) + Bias; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static void ValidateConfig(size_t channels, int frames) { 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(frames, 0); 872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK_LE(channels, static_cast<size_t>(limits::kMaxChannels)); 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void CheckOverflow(int start_frame, int frames, int total_frames) { 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(start_frame, 0); 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(frames, 0); 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GT(total_frames, 0); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sum = start_frame + frames; 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LE(sum, total_frames); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(sum, 0); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels, int frames) 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : frames_(frames), 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channels, frames_); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 0; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int size = CalculateMemorySizeInternal(channels, frames, &aligned_frames); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data_.reset(static_cast<float*>(base::AlignedAlloc( 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size, AudioBus::kChannelAlignment))); 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BuildChannelData(channels, aligned_frames, data_.get()); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels, int frames, float* data) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : frames_(frames), 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Since |data| may have come from an external source, ensure it's valid. 1172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK(data); 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channels, frames_); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int aligned_frames = 0; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CalculateMemorySizeInternal(channels, frames, &aligned_frames); 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BuildChannelData(channels, aligned_frames, data); 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int frames, const std::vector<float*>& channel_data) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : channel_data_(channel_data), 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_(frames), 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(false) { 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ValidateConfig(channel_data_.size(), frames_); 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Sanity check wrapped vector for alignment and channel count. 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(channel_data_[i])); 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::AudioBus(int channels) 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : channel_data_(channels), 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_(0), 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) can_set_channel_data_(true) { 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_[i] = NULL; 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioBus::~AudioBus() {} 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::Create(int channels, int frames) { 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(channels, frames)); 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::Create(const AudioParameters& params) { 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus( 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params.channels(), params.frames_per_buffer())); 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::CreateWrapper(int channels) { 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(channels)); 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapVector( 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames, const std::vector<float*>& channel_data) { 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus(frames, channel_data)); 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapMemory(int channels, int frames, 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* data) { 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |data| must be aligned by AudioBus::kChannelAlignment. 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(IsAligned(data)); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return scoped_ptr<AudioBus>(new AudioBus( 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channels, frames, static_cast<float*>(data))); 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)scoped_ptr<AudioBus> AudioBus::WrapMemory(const AudioParameters& params, 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) params.channels(), params.frames_per_buffer(), 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<float*>(data))); 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::SetChannelData(int channel, float* data) { 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(can_set_channel_data_); 1842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CHECK(data); 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_GE(channel, 0); 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_LT(static_cast<size_t>(channel), channel_data_.size()); 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(data)); 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_[channel] = data; 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::set_frames(int frames) { 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(can_set_channel_data_); 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames_ = frames; 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ZeroFramesPartial(int start_frame, int frames) { 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (frames <= 0) 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < channel_data_.size(); ++i) { 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(channel_data_[i] + start_frame, 0, 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) frames * sizeof(*channel_data_[i])); 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ZeroFrames(int frames) { 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(0, frames); 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::Zero() { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFrames(frames_); 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioBus::CalculateMemorySize(const AudioParameters& params) { 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CalculateMemorySizeInternal( 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) params.channels(), params.frames_per_buffer(), NULL); 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int AudioBus::CalculateMemorySize(int channels, int frames) { 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CalculateMemorySizeInternal(channels, frames, NULL); 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::BuildChannelData(int channels, int aligned_frames, float* data) { 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsAligned(data)); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(channel_data_.size(), 0U); 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Separate audio data out into channels for easy lookup later. Figure out 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_.reserve(channels); 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < channels; ++i) 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_data_.push_back(data + i * aligned_frames); 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(dalecurtis): See if intrinsic optimizations help any here. 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::FromInterleavedPartial(const void* source, int start_frame, 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int frames, int bytes_per_sample) { 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (bytes_per_sample) { 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 1: 240c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) FromInterleavedInternal<uint8, int16, kUint8Bias>( 241c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) source, start_frame, frames, this, 242c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1.0f / kint8min, 1.0f / kint8max); 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 2: 245c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) FromInterleavedInternal<int16, int16, 0>( 246c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) source, start_frame, frames, this, 247c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1.0f / kint16min, 1.0f / kint16max); 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 4: 250c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) FromInterleavedInternal<int32, int32, 0>( 251c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) source, start_frame, frames, this, 252c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1.0f / kint32min, 1.0f / kint32max); 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Unsupported bytes per sample encountered."; 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(start_frame, frames); 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Don't clear remaining frames if this is a partial deinterleave. 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!start_frame) { 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Zero any remaining frames. 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZeroFramesPartial(frames, frames_ - frames); 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::FromInterleaved(const void* source, int frames, 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int bytes_per_sample) { 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FromInterleavedPartial(source, 0, frames, bytes_per_sample); 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::ToInterleaved(int frames, int bytes_per_sample, 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* dest) const { 2742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ToInterleavedPartial(0, frames, bytes_per_sample, dest); 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// TODO(dalecurtis): See if intrinsic optimizations help any here. 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void AudioBus::ToInterleavedPartial(int start_frame, int frames, 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int bytes_per_sample, void* dest) const { 2802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CheckOverflow(start_frame, frames, frames_); 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (bytes_per_sample) { 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 1: 283c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ToInterleavedInternal<uint8, int16, kUint8Bias>( 284c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) this, start_frame, frames, dest, kint8min, kint8max); 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 2: 287c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ToInterleavedInternal<int16, int16, 0>( 288c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) this, start_frame, frames, dest, kint16min, kint16max); 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 4: 291c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ToInterleavedInternal<int32, int32, 0>( 292c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) this, start_frame, frames, dest, kint32min, kint32max); 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Unsupported bytes per sample encountered."; 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(dest, 0, frames * bytes_per_sample); 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioBus::CopyTo(AudioBus* dest) const { 3027dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch CopyPartialFramesTo(0, frames(), 0, dest); 3037dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 3047dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 3057dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochvoid AudioBus::CopyPartialFramesTo(int source_start_frame, 3067dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch int frame_count, 3077dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch int dest_start_frame, 3087dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch AudioBus* dest) const { 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK_EQ(channels(), dest->channels()); 3107dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch CHECK_LE(source_start_frame + frame_count, frames()); 3117dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch CHECK_LE(dest_start_frame + frame_count, dest->frames()); 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Since we don't know if the other AudioBus is wrapped or not (and we don't 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // want to care), just copy using the public channel() accessors. 3157dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch for (int i = 0; i < channels(); ++i) { 3167dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch memcpy(dest->channel(i) + dest_start_frame, 3177dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch channel(i) + source_start_frame, 3187dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch sizeof(*channel(i)) * frame_count); 3197dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 322c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)void AudioBus::Scale(float volume) { 323c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (volume > 0 && volume != 1) { 324c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) for (int i = 0; i < channels(); ++i) 325c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) vector_math::FMUL(channel(i), volume, frames(), channel(i)); 326c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } else if (volume == 0) { 327c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) Zero(); 328c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 329c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 330c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 332