diff options
Diffstat (limited to 'audio/out/ao_coreaudio_common.c')
-rw-r--r-- | audio/out/ao_coreaudio_common.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/audio/out/ao_coreaudio_common.c b/audio/out/ao_coreaudio_common.c new file mode 100644 index 0000000000..56bb99314f --- /dev/null +++ b/audio/out/ao_coreaudio_common.c @@ -0,0 +1,304 @@ +/* + * This file is part of mpv. + * + * 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/>. + */ + +/* + * This file contains functions interacting with the CoreAudio framework + * that are not specific to the AUHAL. These are split in a separate file for + * the sake of readability. In the future the could be used by other AOs based + * on CoreAudio but not the AUHAL (such as using AudioQueue services). + */ + +#include <AudioToolbox/AudioToolbox.h> +#include <AudioUnit/AudioUnit.h> +#include <inttypes.h> +#include <stdbool.h> +#include "core/mp_msg.h" + +#define ca_msg(a, b ...) mp_msg(MSGT_AO, a, "AO: [coreaudio] " b) +#define CA_CFSTR_ENCODING kCFStringEncodingASCII + +static char *fourcc_repr(void *talloc_ctx, uint32_t code) +{ + // Extract FourCC letters from the uint32_t and finde out if it's a valid + // code that is made of letters. + char fcc[4] = { + (code >> 24) & 0xFF, + (code >> 16) & 0xFF, + (code >> 8) & 0xFF, + code & 0xFF, + }; + + bool valid_fourcc = true; + for (int i = 0; i < 4; i++) + if (!isprint(fcc[i])) + valid_fourcc = false; + + char *repr; + if (valid_fourcc) + repr = talloc_asprintf(talloc_ctx, "'%c%c%c%c'", + fcc[0], fcc[1], fcc[2], fcc[3]); + else + repr = talloc_asprintf(NULL, "%d", code); + + return repr; +} + +static bool check_ca_st(int level, OSStatus code, const char *message) +{ + if (code == noErr) return true; + + char *error_string = fourcc_repr(NULL, code); + ca_msg(level, "%s (%s)\n", message, error_string); + talloc_free(error_string); + + return false; +} + +#define CHECK_CA_ERROR_L(label, message) \ + do { \ + if (!check_ca_st(MSGL_ERR, err, message)) { \ + goto label; \ + } \ + } while (0) + +#define CHECK_CA_ERROR(message) CHECK_CA_ERROR_L(coreaudio_error, message) + +static void ca_print_asbd(const char *description, + const AudioStreamBasicDescription *asbd) +{ + uint32_t flags = asbd->mFormatFlags; + char *format = fourcc_repr(NULL, asbd->mFormatID); + + ca_msg(MSGL_V, + "%s %7.1fHz %" PRIu32 "bit [%s]" + "[%" PRIu32 "][%" PRIu32 "][%" PRIu32 "]" + "[%" PRIu32 "][%" PRIu32 "] " + "%s %s %s%s%s%s\n", + description, asbd->mSampleRate, asbd->mBitsPerChannel, format, + asbd->mFormatFlags, asbd->mBytesPerPacket, asbd->mFramesPerPacket, + asbd->mBytesPerFrame, asbd->mChannelsPerFrame, + (flags & kAudioFormatFlagIsFloat) ? "float" : "int", + (flags & kAudioFormatFlagIsBigEndian) ? "BE" : "LE", + (flags & kAudioFormatFlagIsSignedInteger) ? "S" : "U", + (flags & kAudioFormatFlagIsPacked) ? " packed" : "", + (flags & kAudioFormatFlagIsAlignedHigh) ? " aligned" : "", + (flags & kAudioFormatFlagIsNonInterleaved) ? " P" : ""); + + talloc_free(format); +} + +static OSStatus GetAudioProperty(AudioObjectID id, + AudioObjectPropertySelector selector, + UInt32 outSize, void *outData) +{ + AudioObjectPropertyAddress p_addr; + + p_addr.mSelector = selector; + p_addr.mScope = kAudioObjectPropertyScopeGlobal; + p_addr.mElement = kAudioObjectPropertyElementMaster; + + return AudioObjectGetPropertyData(id, &p_addr, 0, NULL, &outSize, + outData); +} + +static UInt32 GetAudioPropertyArray(AudioObjectID id, + AudioObjectPropertySelector selector, + AudioObjectPropertyScope scope, + void **data) +{ + OSStatus err; + AudioObjectPropertyAddress p_addr; + UInt32 p_size; + + p_addr.mSelector = selector; + p_addr.mScope = scope; + p_addr.mElement = kAudioObjectPropertyElementMaster; + + err = AudioObjectGetPropertyDataSize(id, &p_addr, 0, NULL, &p_size); + CHECK_CA_ERROR("Can't fetch property size"); + + *data = malloc(p_size); + + err = AudioObjectGetPropertyData(id, &p_addr, 0, NULL, &p_size, *data); + CHECK_CA_ERROR_L(coreaudio_error_free, "Can't fetch property data %s"); + + return p_size; + +coreaudio_error_free: + free(*data); +coreaudio_error: + return 0; +} + +static UInt32 GetGlobalAudioPropertyArray(AudioObjectID id, + AudioObjectPropertySelector selector, + void **outData) +{ + return GetAudioPropertyArray(id, selector, kAudioObjectPropertyScopeGlobal, + outData); +} + +static OSStatus GetAudioPropertyString(AudioObjectID id, + AudioObjectPropertySelector selector, + char **data) +{ + OSStatus err; + AudioObjectPropertyAddress p_addr; + UInt32 p_size = sizeof(CFStringRef); + CFStringRef string; + + p_addr.mSelector = selector; + p_addr.mScope = kAudioObjectPropertyScopeGlobal; + p_addr.mElement = kAudioObjectPropertyElementMaster; + + err = AudioObjectGetPropertyData(id, &p_addr, 0, NULL, &p_size, &string); + CHECK_CA_ERROR("Can't fetch array property"); + + CFIndex size = + CFStringGetMaximumSizeForEncoding( + CFStringGetLength(string), CA_CFSTR_ENCODING) + 1; + + *data = malloc(size); + CFStringGetCString(string, *data, size, CA_CFSTR_ENCODING); + CFRelease(string); +coreaudio_error: + return err; +} + +static OSStatus SetAudioProperty(AudioObjectID id, + AudioObjectPropertySelector selector, + UInt32 inDataSize, void *inData) +{ + AudioObjectPropertyAddress p_addr; + + p_addr.mSelector = selector; + p_addr.mScope = kAudioObjectPropertyScopeGlobal; + p_addr.mElement = kAudioObjectPropertyElementMaster; + + return AudioObjectSetPropertyData(id, &p_addr, 0, NULL, + inDataSize, inData); +} + +static Boolean IsAudioPropertySettable(AudioObjectID id, + AudioObjectPropertySelector selector, + Boolean *outData) +{ + AudioObjectPropertyAddress p_addr; + + p_addr.mSelector = selector; + p_addr.mScope = kAudioObjectPropertyScopeGlobal; + p_addr.mElement = kAudioObjectPropertyElementMaster; + + return AudioObjectIsPropertySettable(id, &p_addr, outData); +} + +static int AudioStreamSupportsDigital(AudioStreamID stream) +{ + AudioStreamRangedDescription *formats = NULL; + + /* Retrieve all the stream formats supported by each output stream. */ + uint32_t size = + GetGlobalAudioPropertyArray(stream, + kAudioStreamPropertyAvailablePhysicalFormats, + (void **)&formats); + + if (!size) { + ca_msg(MSGL_WARN, "Could not get number of stream formats.\n"); + return CONTROL_FALSE; + } + + const int n_formats = size / sizeof(AudioStreamRangedDescription); + for (int i = 0; i < n_formats; ++i) { + AudioStreamBasicDescription asbd = formats[i].mFormat; + ca_print_asbd("supported format:", &(asbd)); + + switch (asbd.mFormatID) + case 'IAC3': + case 'iac3': + case kAudioFormat60958AC3: + case kAudioFormatAC3: + free(formats); + return CONTROL_OK; + } + + free(formats); + return CONTROL_FALSE; +} + +static int AudioDeviceSupportsDigital(AudioDeviceID device) +{ + AudioStreamID *streams = NULL; + + /* Retrieve all the output streams. */ + uint32_t size = GetAudioPropertyArray(device, + kAudioDevicePropertyStreams, + kAudioDevicePropertyScopeOutput, + (void **)&streams); + + if (!size) { + ca_msg(MSGL_WARN, "could not get number of streams.\n"); + return CONTROL_FALSE; + } + + const int n_streams = size / sizeof(AudioStreamID); + for (int i = 0; i < n_streams; ++i) { + if (AudioStreamSupportsDigital(streams[i])) { + free(streams); + return CONTROL_OK; + } + } + + free(streams); + return CONTROL_FALSE; +} + +static OSStatus ca_property_listener(AudioObjectPropertySelector selector, + AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + // TODO: ++i seems wrong in this context. Check out if it was a programmer + // mistake + void *talloc_ctx = talloc_new(NULL); + + for (int i = 0; i < n_addresses; ++i) { + if (addresses[i].mSelector == selector) { + ca_msg(MSGL_WARN, "event: property %s changed", + fourcc_repr(talloc_ctx, selector)); + if (data) *(volatile int *)data = 1; + break; + } + } + talloc_free(talloc_ctx); + return noErr; +} + +static OSStatus ca_stream_listener(AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + return ca_property_listener(kAudioStreamPropertyPhysicalFormat, + object, n_addresses, addresses, data); +} + +static OSStatus ca_device_listener(AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + return ca_property_listener(kAudioDevicePropertyDeviceHasChanged, + object, n_addresses, addresses, data); +} |