mpv/audio/out/ao_coreaudio_utils.h

/*
 * This file is part of mpv.
 * Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
 *
 * mpv is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * mpv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with mpv.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MPV_COREAUDIO_UTILS_H
#define MPV_COREAUDIO_UTILS_H

#include <AudioToolbox/AudioToolbox.h>
#include <inttypes.h>
#include <stdbool.h>
#include "common/msg.h"
#include "audio/out/ao.h"
#include "internal.h"

#define CA_CFSTR_ENCODING kCFStringEncodingASCII

CFStringRef cfstr_from_cstr(char *str);
char *cfstr_get_cstr(CFStringRef cfstr);

char *fourcc_repr_buf(char *buf, size_t buf_size, uint32_t code);
#define fourcc_repr(code) fourcc_repr_buf((char[40]){0}, 40, code)

bool check_ca_st(struct ao *ao, int level, OSStatus code, const char *message);

#define CHECK_CA_ERROR_L(label, message) \
    do { \
        if (!check_ca_st(ao, MSGL_ERR, err, message)) { \
            goto label; \
        } \
    } while (0)

#define CHECK_CA_ERROR(message) CHECK_CA_ERROR_L(coreaudio_error, message)
#define CHECK_CA_WARN(message)  check_ca_st(ao, MSGL_WARN, err, message)

#define CHECK_CA_ERROR_SILENT_L(label) \
    do { \
        if (err != noErr) goto label; \
    } while (0)

void ca_get_device_list(struct ao *ao, struct ao_device_list *list);
OSStatus ca_select_device(struct ao *ao, char* name, AudioDeviceID *device);

bool ca_formatid_is_compressed(uint32_t formatid);
void ca_fill_asbd(struct ao *ao, AudioStreamBasicDescription *asbd);
void ca_print_asbd(struct ao *ao, const char *description,
                   const AudioStreamBasicDescription *asbd);
bool ca_asbd_equals(const AudioStreamBasicDescription *a,
                    const AudioStreamBasicDescription *b);
int ca_asbd_to_mp_format(const AudioStreamBasicDescription *asbd);
bool ca_asbd_is_better(AudioStreamBasicDescription *req,
                       AudioStreamBasicDescription *old,
                       AudioStreamBasicDescription *new);

int64_t ca_frames_to_us(struct ao *ao, uint32_t frames);
int64_t ca_get_latency(const AudioTimeStamp *ts);

bool ca_device_supports_compressed(struct ao *ao, AudioDeviceID device);
bool ca_stream_supports_compressed(struct ao *ao, AudioStreamID stream);
OSStatus ca_lock_device(AudioDeviceID device, pid_t *pid);
OSStatus ca_unlock_device(AudioDeviceID device, pid_t *pid);
OSStatus ca_disable_mixing(struct ao *ao, AudioDeviceID device, bool *changed);
OSStatus ca_enable_mixing(struct ao *ao, AudioDeviceID device, bool changed);
bool ca_change_physical_format_sync(struct ao *ao, AudioStreamID stream,
                                    AudioStreamBasicDescription change_format);

#endif /* MPV_COREAUDIO_UTILS_H */