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https://github.com/mpv-player/mpv.git
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b46ffaec7c
CoreAudio supports 3 kinds of layouts: bitmap based, tag based, and speaker description based (using either channel labels or positional data). Previously we tried to convert everything to bitmap based channel layouts, but it turns out description based ones are the most generic and there are built-in CoreAudio APIs to perform the conversion in this direction. Moreover description based layouts support waveext extensions (like SDL and SDR), and are easier to map to mp_chmaps.
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*
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* This file is part of mpv.
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* Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
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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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#ifndef MPV_COREAUDIO_UTILS_H
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#define MPV_COREAUDIO_UTILS_H
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#include <AudioToolbox/AudioToolbox.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include "common/msg.h"
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#include "audio/out/ao.h"
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#include "internal.h"
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#define CA_CFSTR_ENCODING kCFStringEncodingASCII
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char *fourcc_repr(void *talloc_ctx, uint32_t code);
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bool check_ca_st(struct ao *ao, int level, OSStatus code, const char *message);
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#define CHECK_CA_ERROR_L(label, message) \
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do { \
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if (!check_ca_st(ao, MSGL_ERR, err, message)) { \
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goto label; \
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} \
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} while (0)
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#define CHECK_CA_ERROR(message) CHECK_CA_ERROR_L(coreaudio_error, message)
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#define CHECK_CA_WARN(message) check_ca_st(ao, MSGL_WARN, err, message)
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#define CHECK_CA_ERROR_SILENT_L(label) \
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do { \
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if (err != noErr) goto label; \
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} while (0)
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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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bool ca_format_is_digital(AudioStreamBasicDescription asbd);
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bool ca_stream_supports_digital(struct ao *ao, AudioStreamID stream);
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bool ca_device_supports_digital(struct ao *ao, AudioDeviceID device);
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OSStatus ca_property_listener(AudioObjectPropertySelector selector,
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AudioObjectID object, uint32_t n_addresses,
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const AudioObjectPropertyAddress addresses[],
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void *data);
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OSStatus ca_stream_listener(AudioObjectID object, uint32_t n_addresses,
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const AudioObjectPropertyAddress addresses[],
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void *data);
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OSStatus ca_device_listener(AudioObjectID object, uint32_t n_addresses,
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const AudioObjectPropertyAddress addresses[],
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void *data);
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OSStatus ca_lock_device(AudioDeviceID device, pid_t *pid);
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OSStatus ca_unlock_device(AudioDeviceID device, pid_t *pid);
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OSStatus ca_disable_mixing(struct ao *ao, AudioDeviceID device, bool *changed);
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OSStatus ca_enable_mixing(struct ao *ao, AudioDeviceID device, bool changed);
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OSStatus ca_enable_device_listener(AudioDeviceID device, void *flag);
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OSStatus ca_disable_device_listener(AudioDeviceID device, void *flag);
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bool ca_change_format(struct ao *ao, AudioStreamID stream,
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AudioStreamBasicDescription change_format);
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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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#endif /* MPV_COREAUDIO_UTILS_H */
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