mirror of
https://github.com/mpv-player/mpv.git
synced 2024-09-20 12:02:23 +02:00
354 lines
11 KiB
C
354 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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#define ca_msg(a, b ...) mp_msg(MSGT_AO, a, "AO: [coreaudio] " b)
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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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{
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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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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 (!isprint(fcc[i]))
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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(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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ca_msg(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_print_asbd(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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ca_msg(MSGL_V,
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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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bool ca_format_is_digital(AudioStreamBasicDescription asbd)
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{
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switch (asbd.mFormatID)
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case 'IAC3':
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case 'iac3':
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case kAudioFormat60958AC3:
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case kAudioFormatAC3:
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return true;
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return false;
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}
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bool ca_stream_supports_digital(AudioStreamID stream)
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{
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AudioStreamRangedDescription *formats = NULL;
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/* Retrieve all the stream formats supported by each output stream. */
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uint32_t size =
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GetGlobalAudioPropertyArray(stream,
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kAudioStreamPropertyAvailablePhysicalFormats,
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(void **)&formats);
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if (!size) {
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ca_msg(MSGL_WARN, "Could not get number of stream formats.\n");
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return false;
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}
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const int n_formats = size / sizeof(AudioStreamRangedDescription);
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for (int i = 0; i < n_formats; i++) {
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AudioStreamBasicDescription asbd = formats[i].mFormat;
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ca_print_asbd("supported format:", &(asbd));
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if (ca_format_is_digital(asbd)) {
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free(formats);
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return true;
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}
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}
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free(formats);
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return false;
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}
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bool ca_device_supports_digital(AudioDeviceID device)
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{
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AudioStreamID *streams = NULL;
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/* Retrieve all the output streams. */
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uint32_t size = GetAudioPropertyArray(device,
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kAudioDevicePropertyStreams,
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kAudioDevicePropertyScopeOutput,
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(void **)&streams);
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if (!size) {
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ca_msg(MSGL_WARN, "could not get number of streams.\n");
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return CONTROL_FALSE;
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}
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const int n_streams = size / sizeof(AudioStreamID);
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for (int i = 0; i < n_streams; i++) {
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if (ca_stream_supports_digital(streams[i])) {
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free(streams);
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return true;
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}
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}
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free(streams);
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return false;
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}
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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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{
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void *talloc_ctx = talloc_new(NULL);
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for (int i = 0; i < n_addresses; i++) {
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if (addresses[i].mSelector == selector) {
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ca_msg(MSGL_WARN, "event: property %s changed\n",
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fourcc_repr(talloc_ctx, selector));
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if (data) *(volatile int *)data = 1;
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break;
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}
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}
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talloc_free(talloc_ctx);
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return noErr;
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}
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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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{
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return ca_property_listener(kAudioStreamPropertyPhysicalFormat,
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object, n_addresses, addresses, data);
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}
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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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{
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return ca_property_listener(kAudioDevicePropertyDeviceHasChanged,
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object, n_addresses, addresses, data);
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}
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OSStatus ca_lock_device(AudioDeviceID device, pid_t *pid) {
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*pid = getpid();
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OSStatus err = SetAudioProperty(device, kAudioDevicePropertyHogMode,
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sizeof(*pid), pid);
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if (err != noErr)
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*pid = -1;
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return err;
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}
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OSStatus ca_unlock_device(AudioDeviceID device, pid_t *pid) {
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if (*pid == getpid()) {
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*pid = -1;
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return SetAudioProperty(device, kAudioDevicePropertyHogMode,
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sizeof(*pid), &pid);
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}
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return noErr;
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}
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static OSStatus ca_change_mixing(AudioDeviceID device, uint32_t val,
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bool *changed) {
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*changed = false;
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AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
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.mSelector = kAudioDevicePropertySupportsMixing,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster,
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};
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if (AudioObjectHasProperty(device, &p_addr)) {
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OSStatus err;
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Boolean writeable = 0;
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err = IsAudioPropertySettable(device, kAudioDevicePropertySupportsMixing,
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&writeable);
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if (!CHECK_CA_WARN("can't tell if mixing property is settable")) {
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return err;
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}
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if (!writeable)
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return noErr;
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err = SetAudioProperty(device, kAudioDevicePropertySupportsMixing,
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sizeof(uint32_t), &val);
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if (err != noErr)
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return err;
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if (!CHECK_CA_WARN("can't set mix mode")) {
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return err;
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}
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*changed = true;
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}
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return noErr;
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}
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OSStatus ca_disable_mixing(AudioDeviceID device, bool *changed) {
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return ca_change_mixing(device, 0, changed);
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}
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OSStatus ca_enable_mixing(AudioDeviceID device, bool changed) {
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if (changed) {
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bool dont_care = false;
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return ca_change_mixing(device, 1, &dont_care);
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}
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return noErr;
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}
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static OSStatus ca_change_device_listening(AudioDeviceID device,
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void *flag, bool enabled)
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{
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AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
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.mSelector = kAudioDevicePropertyDeviceHasChanged,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster,
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};
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if (enabled) {
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return AudioObjectAddPropertyListener(
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device, &p_addr, ca_device_listener, flag);
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} else {
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return AudioObjectRemovePropertyListener(
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device, &p_addr, ca_device_listener, flag);
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}
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}
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OSStatus ca_enable_device_listener(AudioDeviceID device, void *flag) {
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return ca_change_device_listening(device, flag, true);
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}
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OSStatus ca_disable_device_listener(AudioDeviceID device, void *flag) {
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return ca_change_device_listening(device, flag, false);
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}
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bool ca_change_format(AudioStreamID stream,
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AudioStreamBasicDescription change_format)
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{
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OSStatus err = noErr;
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AudioObjectPropertyAddress p_addr;
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volatile int stream_format_changed = 0;
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ca_print_asbd("setting stream format:", &change_format);
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/* Install the callback. */
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p_addr = (AudioObjectPropertyAddress) {
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.mSelector = kAudioStreamPropertyPhysicalFormat,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster,
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};
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err = AudioObjectAddPropertyListener(stream, &p_addr, ca_stream_listener,
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(void *)&stream_format_changed);
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if (!CHECK_CA_WARN("can't add property listener during format change")) {
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return false;
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}
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/* Change the format. */
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err = SetAudioProperty(stream, kAudioStreamPropertyPhysicalFormat,
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sizeof(AudioStreamBasicDescription), &change_format);
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if (!CHECK_CA_WARN("error changing physical format")) {
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return false;
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}
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/* The AudioStreamSetProperty is not only asynchronious,
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* it is also not Atomic, in its behaviour.
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* Therefore we check 5 times before we really give up. */
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bool format_set = false;
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for (int i = 0; !format_set && i < 5; i++) {
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for (int j = 0; !stream_format_changed && j < 50; j++)
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mp_sleep_us(10000);
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if (stream_format_changed) {
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stream_format_changed = 0;
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} else {
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ca_msg(MSGL_V, "reached timeout\n");
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}
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AudioStreamBasicDescription actual_format;
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err = CA_GET(stream, kAudioStreamPropertyPhysicalFormat, &actual_format);
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ca_print_asbd("actual format in use:", &actual_format);
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if (actual_format.mSampleRate == change_format.mSampleRate &&
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actual_format.mFormatID == change_format.mFormatID &&
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actual_format.mFramesPerPacket == change_format.mFramesPerPacket) {
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format_set = true;
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}
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}
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err = AudioObjectRemovePropertyListener(stream, &p_addr, ca_stream_listener,
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(void *)&stream_format_changed);
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if (!CHECK_CA_WARN("can't remove property listener")) {
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return false;
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}
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return format_set;
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}
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