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-rw-r--r--audio/out/ao_coreaudio_common.c304
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
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--- /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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 03:32:11 +0000