mirror of
https://github.com/mpv-player/mpv
synced 2024-12-20 22:02:59 +00:00
301 lines
11 KiB
C
301 lines
11 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* This file contains functions interacting with the CoreAudio framework
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* that are not specific to the AUHAL. These are split in a separate file for
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* the sake of readability. In the future the could be used by other AOs based
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* on CoreAudio but not the AUHAL (such as using AudioQueue services).
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*/
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#include "audio/out/ao_coreaudio_utils.h"
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#include "audio/out/ao_coreaudio_properties.h"
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#include "osdep/timer.h"
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#include "audio/format.h"
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void ca_print_device_list(struct ao *ao)
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{
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char *help = talloc_strdup(NULL, "Available output devices:\n");
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AudioDeviceID *devs;
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size_t n_devs;
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OSStatus err =
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CA_GET_ARY(kAudioObjectSystemObject, kAudioHardwarePropertyDevices,
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&devs, &n_devs);
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CHECK_CA_ERROR("Failed to get list of output devices.");
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for (int i = 0; i < n_devs; i++) {
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char *name;
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err = CA_GET_STR(devs[i], kAudioObjectPropertyName, &name);
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if (err == noErr)
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talloc_steal(devs, name);
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else
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name = "Unknown";
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help = talloc_asprintf_append(
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help, " * %s (id: %" PRIu32 ")\n", name, devs[i]);
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}
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talloc_free(devs);
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coreaudio_error:
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MP_INFO(ao, "%s", help);
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talloc_free(help);
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}
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OSStatus ca_select_device(struct ao *ao, int selection, AudioDeviceID *device)
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{
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OSStatus err = noErr;
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*device = 0;
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if (selection < 0) {
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// device not set by user, get the default one
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err = CA_GET(kAudioObjectSystemObject,
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kAudioHardwarePropertyDefaultOutputDevice,
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device);
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CHECK_CA_ERROR("could not get default audio device");
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} else {
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*device = selection;
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}
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if (mp_msg_test(ao->log, MSGL_V)) {
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char *name;
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err = CA_GET_STR(*device, kAudioObjectPropertyName, &name);
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CHECK_CA_ERROR("could not get selected audio device name");
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MP_VERBOSE(ao, "selected audio output device: %s (%" PRIu32 ")\n",
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name, *device);
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talloc_free(name);
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}
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coreaudio_error:
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return err;
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}
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char *fourcc_repr(void *talloc_ctx, uint32_t code)
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{
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// Extract FourCC letters from the uint32_t and finde out if it's a valid
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// code that is made of letters.
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unsigned char fcc[4] = {
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(code >> 24) & 0xFF,
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(code >> 16) & 0xFF,
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(code >> 8) & 0xFF,
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code & 0xFF,
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};
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bool valid_fourcc = true;
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for (int i = 0; i < 4; i++)
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if (fcc[i] >= 32 && fcc[i] < 128)
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valid_fourcc = false;
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char *repr;
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if (valid_fourcc)
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repr = talloc_asprintf(talloc_ctx, "'%c%c%c%c'",
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fcc[0], fcc[1], fcc[2], fcc[3]);
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else
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repr = talloc_asprintf(NULL, "%d", code);
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return repr;
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}
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bool check_ca_st(struct ao *ao, int level, OSStatus code, const char *message)
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{
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if (code == noErr) return true;
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char *error_string = fourcc_repr(NULL, code);
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mp_msg(ao->log, level, "%s (%s)\n", message, error_string);
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talloc_free(error_string);
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return false;
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}
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void ca_fill_asbd(struct ao *ao, AudioStreamBasicDescription *asbd)
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{
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asbd->mSampleRate = ao->samplerate;
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asbd->mFormatID = AF_FORMAT_IS_AC3(ao->format) ?
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kAudioFormat60958AC3 :
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kAudioFormatLinearPCM;
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asbd->mChannelsPerFrame = ao->channels.num;
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asbd->mBitsPerChannel = af_fmt2bits(ao->format);
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asbd->mFormatFlags = kAudioFormatFlagIsPacked;
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if ((ao->format & AF_FORMAT_POINT_MASK) == AF_FORMAT_F)
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asbd->mFormatFlags |= kAudioFormatFlagIsFloat;
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if ((ao->format & AF_FORMAT_SIGN_MASK) == AF_FORMAT_SI)
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asbd->mFormatFlags |= kAudioFormatFlagIsSignedInteger;
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if ((ao->format & AF_FORMAT_END_MASK) == AF_FORMAT_BE)
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asbd->mFormatFlags |= kAudioFormatFlagIsBigEndian;
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asbd->mFramesPerPacket = 1;
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asbd->mBytesPerPacket = asbd->mBytesPerFrame =
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asbd->mFramesPerPacket * asbd->mChannelsPerFrame *
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(asbd->mBitsPerChannel / 8);
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}
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void ca_print_asbd(struct ao *ao, const char *description,
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const AudioStreamBasicDescription *asbd)
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{
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uint32_t flags = asbd->mFormatFlags;
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char *format = fourcc_repr(NULL, asbd->mFormatID);
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MP_VERBOSE(ao,
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"%s %7.1fHz %" PRIu32 "bit [%s]"
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"[%" PRIu32 "][%" PRIu32 "][%" PRIu32 "]"
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"[%" PRIu32 "][%" PRIu32 "] "
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"%s %s %s%s%s%s\n",
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description, asbd->mSampleRate, asbd->mBitsPerChannel, format,
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asbd->mFormatFlags, asbd->mBytesPerPacket, asbd->mFramesPerPacket,
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asbd->mBytesPerFrame, asbd->mChannelsPerFrame,
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(flags & kAudioFormatFlagIsFloat) ? "float" : "int",
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(flags & kAudioFormatFlagIsBigEndian) ? "BE" : "LE",
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(flags & kAudioFormatFlagIsSignedInteger) ? "S" : "U",
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(flags & kAudioFormatFlagIsPacked) ? " packed" : "",
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(flags & kAudioFormatFlagIsAlignedHigh) ? " aligned" : "",
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(flags & kAudioFormatFlagIsNonInterleaved) ? " P" : "");
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talloc_free(format);
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}
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static const int speaker_map[][2] = {
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{ kAudioChannelLabel_Left, MP_SPEAKER_ID_FL },
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{ kAudioChannelLabel_Right, MP_SPEAKER_ID_FR },
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{ kAudioChannelLabel_Center, MP_SPEAKER_ID_FC },
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{ kAudioChannelLabel_LFEScreen, MP_SPEAKER_ID_LFE },
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{ kAudioChannelLabel_LeftSurround, MP_SPEAKER_ID_BL },
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{ kAudioChannelLabel_RightSurround, MP_SPEAKER_ID_BR },
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{ kAudioChannelLabel_LeftCenter, MP_SPEAKER_ID_FLC },
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{ kAudioChannelLabel_RightCenter, MP_SPEAKER_ID_FRC },
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{ kAudioChannelLabel_CenterSurround, MP_SPEAKER_ID_BC },
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{ kAudioChannelLabel_LeftSurroundDirect, MP_SPEAKER_ID_SL },
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{ kAudioChannelLabel_RightSurroundDirect, MP_SPEAKER_ID_SR },
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{ kAudioChannelLabel_TopCenterSurround, MP_SPEAKER_ID_TC },
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{ kAudioChannelLabel_VerticalHeightLeft, MP_SPEAKER_ID_TFL },
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{ kAudioChannelLabel_VerticalHeightCenter, MP_SPEAKER_ID_TFC },
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{ kAudioChannelLabel_VerticalHeightRight, MP_SPEAKER_ID_TFR },
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{ kAudioChannelLabel_TopBackLeft, MP_SPEAKER_ID_TBL },
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{ kAudioChannelLabel_TopBackCenter, MP_SPEAKER_ID_TBC },
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{ kAudioChannelLabel_TopBackRight, MP_SPEAKER_ID_TBR },
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// unofficial extensions
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{ kAudioChannelLabel_RearSurroundLeft, MP_SPEAKER_ID_SDL },
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{ kAudioChannelLabel_RearSurroundRight, MP_SPEAKER_ID_SDR },
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{ kAudioChannelLabel_LeftWide, MP_SPEAKER_ID_WL },
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{ kAudioChannelLabel_RightWide, MP_SPEAKER_ID_WR },
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{ kAudioChannelLabel_LFE2, MP_SPEAKER_ID_LFE2 },
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{ kAudioChannelLabel_HeadphonesLeft, MP_SPEAKER_ID_DL },
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{ kAudioChannelLabel_HeadphonesRight, MP_SPEAKER_ID_DR },
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{ kAudioChannelLabel_Unknown, -1 },
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};
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static int ca_label_to_mp_speaker_id(AudioChannelLabel label)
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{
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for (int i = 0; speaker_map[i][1] >= 0; i++)
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if (speaker_map[i][0] == label)
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return speaker_map[i][1];
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return -1;
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}
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static void ca_log_layout(struct ao *ao, AudioChannelLayout *layout)
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{
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if (!mp_msg_test(ao->log, MSGL_V))
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return;
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AudioChannelDescription *descs = layout->mChannelDescriptions;
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MP_VERBOSE(ao, "layout: tag: <%d>, bitmap: <%d>, "
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"descriptions <%d>\n",
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layout->mChannelLayoutTag,
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layout->mChannelBitmap,
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layout->mNumberChannelDescriptions);
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for (int i = 0; i < layout->mNumberChannelDescriptions; i++) {
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AudioChannelDescription d = descs[i];
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MP_VERBOSE(ao, " - description %d: label <%d, %d>, flags: <%u>, "
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"coords: <%f, %f, %f>\n", i,
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d.mChannelLabel,
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ca_label_to_mp_speaker_id(d.mChannelLabel),
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d.mChannelFlags,
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d.mCoordinates[0],
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d.mCoordinates[1],
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d.mCoordinates[2]);
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}
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}
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bool ca_layout_to_mp_chmap(struct ao *ao, AudioChannelLayout *layout,
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struct mp_chmap *chmap)
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{
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AudioChannelLayoutTag tag = layout->mChannelLayoutTag;
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uint32_t layout_size = sizeof(layout);
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OSStatus err;
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if (tag == kAudioChannelLayoutTag_UseChannelBitmap) {
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err = AudioFormatGetProperty(kAudioFormatProperty_ChannelLayoutForBitmap,
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sizeof(uint32_t),
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&layout->mChannelBitmap,
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&layout_size,
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layout);
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CHECK_CA_ERROR("failed to convert channel bitmap to descriptions");
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} else if (tag != kAudioChannelLayoutTag_UseChannelDescriptions) {
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err = AudioFormatGetProperty(kAudioFormatProperty_ChannelLayoutForTag,
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sizeof(AudioChannelLayoutTag),
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&layout->mChannelLayoutTag,
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&layout_size,
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layout);
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CHECK_CA_ERROR("failed to convert channel tag to descriptions");
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}
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ca_log_layout(ao, layout);
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// If the channel layout uses channel descriptions, from my
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// experiments there are there three possibile cases:
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// * The description has a label kAudioChannelLabel_Unknown:
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// Can't do anything about this (looks like non surround
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// layouts are like this).
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// * The description uses positional information: this in
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// theory could be used but one would have to map spatial
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// positions to labels which is not really feasible.
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// * The description has a well known label which can be mapped
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// to the waveextensible definition: this is the kind of
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// descriptions we process here.
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for (int n = 0; n < layout->mNumberChannelDescriptions; n++) {
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AudioChannelLabel label = layout->mChannelDescriptions[n].mChannelLabel;
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uint8_t speaker = ca_label_to_mp_speaker_id(label);
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if (label == kAudioChannelLabel_Unknown)
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continue;
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if (speaker < 0) {
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MP_VERBOSE(ao, "channel label=%d unusable to build channel "
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"bitmap, skipping layout\n", label);
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} else {
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chmap->speaker[n] = speaker;
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chmap->num = n + 1;
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}
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}
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return chmap->num > 0;
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coreaudio_error:
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ca_log_layout(ao, layout);
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return false;
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}
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