1f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// Copyright 2013 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) 5f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_util.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 10f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "media/audio/alsa/alsa_wrapper.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace alsa_util { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static snd_pcm_t* OpenDevice(media::AlsaWrapper* wrapper, 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* device_name, 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_stream_t type, 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int channels, 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sample_rate, 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_format_t pcm_format, 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int latency_us) { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_t* handle = NULL; 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper->PcmOpen(&handle, device_name, type, SND_PCM_NONBLOCK); 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "PcmOpen: " << device_name << "," 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper->PcmSetParams(handle, pcm_format, 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SND_PCM_ACCESS_RW_INTERLEAVED, channels, 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sample_rate, 1, latency_us); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "PcmSetParams: " << device_name << ", " 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error) << " - Format: " << pcm_format 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << " Channels: " << channels << " Latency: " << latency_us; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (alsa_util::CloseDevice(wrapper, handle) < 0) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(ajwong): Retry on certain errors? 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "Unable to close audio device. Leaking handle."; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return handle; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static std::string DeviceNameToControlName(const std::string& device_name) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char kMixerPrefix[] = "hw"; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string control_name; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t pos1 = device_name.find(':'); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pos1 == std::string::npos) { 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) control_name = device_name; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Examples: 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // deviceName: "front:CARD=Intel,DEV=0", controlName: "hw:CARD=Intel". 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // deviceName: "default:CARD=Intel", controlName: "CARD=Intel". 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t pos2 = device_name.find(','); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) control_name = (pos2 == std::string::npos) ? 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) device_name.substr(pos1) : 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kMixerPrefix + device_name.substr(pos1, pos2 - pos1); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return control_name; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_pcm_format_t BitsToFormat(int bits_per_sample) { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (bits_per_sample) { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 8: 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SND_PCM_FORMAT_U8; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 16: 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SND_PCM_FORMAT_S16; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 24: 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SND_PCM_FORMAT_S24; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 32: 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SND_PCM_FORMAT_S32; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SND_PCM_FORMAT_UNKNOWN; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int CloseDevice(media::AlsaWrapper* wrapper, snd_pcm_t* handle) { 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string device_name = wrapper->PcmName(handle); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper->PcmClose(handle); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "PcmClose: " << device_name << ", " 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return error; 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_pcm_t* OpenCaptureDevice(media::AlsaWrapper* wrapper, 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* device_name, 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int channels, 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sample_rate, 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_format_t pcm_format, 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int latency_us) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return OpenDevice(wrapper, device_name, SND_PCM_STREAM_CAPTURE, channels, 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sample_rate, pcm_format, latency_us); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_pcm_t* OpenPlaybackDevice(media::AlsaWrapper* wrapper, 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* device_name, 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int channels, 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int sample_rate, 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_pcm_format_t pcm_format, 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int latency_us) { 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return OpenDevice(wrapper, device_name, SND_PCM_STREAM_PLAYBACK, channels, 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sample_rate, pcm_format, latency_us); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_mixer_t* OpenMixer(media::AlsaWrapper* wrapper, 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& device_name) { 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_mixer_t* mixer = NULL; 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper->MixerOpen(&mixer, 0); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "MixerOpen: " << device_name << ", " 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string control_name = DeviceNameToControlName(device_name); 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper->MixerAttach(mixer, control_name.c_str()); 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "MixerAttach, " << control_name << ", " 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) alsa_util::CloseMixer(wrapper, mixer, device_name); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper->MixerElementRegister(mixer, NULL, NULL); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "MixerElementRegister: " << control_name << ", " 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) alsa_util::CloseMixer(wrapper, mixer, device_name); 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mixer; 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CloseMixer(media::AlsaWrapper* wrapper, snd_mixer_t* mixer, 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::string& device_name) { 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!mixer) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wrapper->MixerFree(mixer); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = 0; 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!device_name.empty()) { 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string control_name = DeviceNameToControlName(device_name); 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper->MixerDetach(mixer, control_name.c_str()); 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "MixerDetach: " << control_name << ", " 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << wrapper->StrError(error); 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) error = wrapper->MixerClose(mixer); 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << "MixerClose: " << wrapper->StrError(error); 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)snd_mixer_elem_t* LoadCaptureMixerElement(media::AlsaWrapper* wrapper, 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_mixer_t* mixer) { 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!mixer) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int error = wrapper->MixerLoad(mixer); 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (error < 0) { 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "MixerLoad: " << wrapper->StrError(error); 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_mixer_elem_t* elem = NULL; 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snd_mixer_elem_t* mic_elem = NULL; 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char kCaptureElemName[] = "Capture"; 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char kMicElemName[] = "Mic"; 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (elem = wrapper->MixerFirstElem(mixer); 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elem; 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) elem = wrapper->MixerNextElem(elem)) { 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (wrapper->MixerSelemIsActive(elem)) { 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* elem_name = wrapper->MixerSelemName(elem); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (strcmp(elem_name, kCaptureElemName) == 0) 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return elem; 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else if (strcmp(elem_name, kMicElemName) == 0) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mic_elem = elem; 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Did not find any Capture handle, use the Mic handle. 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mic_elem; 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace alsa_util 201