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coreaudio-encoder: Add AudioFormat property enumeration helpers

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This commit is contained in:
Palana 2015-08-10 13:35:18 +02:00
parent 966b4d97e0
commit 5172328ad9
2 changed files with 97 additions and 0 deletions
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87
plugins/coreaudio-encoder/encoder.cpp
View File

@ -1036,6 +1036,93 @@ static void aac_defaults(obs_data_t *settings)
obs_data_set_default_bool(settings, "allow he-aac", true);
}
template <typename Func>
static bool query_property_raw(DStr &log, ca_encoder *ca,
AudioFormatPropertyID property,
const char *get_property_info, const char *get_property,
AudioStreamBasicDescription &desc, Func &&func)
{
UInt32 size = 0;
OSStatus code = AudioFormatGetPropertyInfo(property,
sizeof(AudioStreamBasicDescription), &desc, &size);
if (code) {
log_to_dstr(log, ca, "%s: %s\n", get_property_info,
osstatus_to_dstr(code)->array);
return false;
}
if (!size) {
log_to_dstr(log, ca, "%s returned 0 size\n", get_property_info);
return false;
}
vector<uint8_t> buffer;
try {
buffer.resize(size);
} catch (...) {
log_to_dstr(log, ca, "Failed to allocate %u bytes for %s\n",
static_cast<uint32_t>(size), get_property);
return false;
}
code = AudioFormatGetProperty(property,
sizeof(AudioStreamBasicDescription), &desc, &size,
buffer.data());
if (code) {
log_to_dstr(log, ca, "%s: %s\n", get_property,
osstatus_to_dstr(code)->array);
return false;
}
func(size, static_cast<void*>(buffer.data()));
return true;
}
#define EXPAND_PROPERTY_NAMES(x) x, \
"AudioFormatGetPropertyInfo(" #x ")", \
"AudioFormatGetProperty(" #x ")"
template <typename Func>
static bool enumerate_samplerates(DStr &log, ca_encoder *ca,
AudioStreamBasicDescription &desc, Func &&func)
{
auto helper = [&](UInt32 size, void *data)
{
auto range = static_cast<AudioValueRange*>(data);
size_t num_ranges = size / sizeof(AudioValueRange);
for (size_t i = 0; i < num_ranges; i++)
func(range[i]);
};
return query_property_raw(log, ca, EXPAND_PROPERTY_NAMES(
kAudioFormatProperty_AvailableEncodeSampleRates),
desc, helper);
}
#if 0
// Unused because it returns bitrates that aren't actually usable, i.e.
// Available bitrates vs Applicable bitrates
template <typename Func>
static bool enumerate_bitrates(DStr &log, ca_encoder *ca,
AudioStreamBasicDescription &desc, Func &&func)
{
auto helper = [&](UInt32 size, void *data)
{
auto range = static_cast<AudioValueRange*>(data);
size_t num_ranges = size / sizeof(AudioValueRange);
for (size_t i = 0; i < num_ranges; i++)
func(range[i]);
};
return query_property_raw(log, ca, EXPAND_PROPERTY_NAMES(
kAudioFormatProperty_AvailableEncodeBitRates),
desc, helper);
}
#endif
static vector<UInt32> get_bitrates(DStr &log, ca_encoder *ca,
Float64 samplerate)
{

10
plugins/coreaudio-encoder/windows-imports.h
View File

@ -362,6 +362,13 @@ typedef OSStatus (*AudioFormatGetProperty_t) (
void *outPropertyData
);
typedef OSStatus (*AudioFormatGetPropertyInfo_t) (
AudioFormatPropertyID inPropertyID,
UInt32 inSpecifierSize,
const void *inSpecifier,
UInt32 *outPropertyDataSize
);
static AudioConverterNew_t AudioConverterNew = NULL;
static AudioConverterDispose_t AudioConverterDispose = NULL;
static AudioConverterReset_t AudioConverterReset = NULL;
@ -370,6 +377,7 @@ static AudioConverterGetPropertyInfo_t AudioConverterGetPropertyInfo = NULL;
static AudioConverterSetProperty_t AudioConverterSetProperty = NULL;
static AudioConverterFillComplexBuffer_t AudioConverterFillComplexBuffer = NULL;
static AudioFormatGetProperty_t AudioFormatGetProperty = NULL;
static AudioFormatGetPropertyInfo_t AudioFormatGetPropertyInfo = NULL;
static HMODULE audio_toolbox = NULL;
@ -429,6 +437,7 @@ static void unload_core_audio(void)
AudioConverterSetProperty = NULL;
AudioConverterFillComplexBuffer = NULL;
AudioFormatGetProperty = NULL;
AudioFormatGetPropertyInfo = NULL;
release_lib();
}
@ -460,6 +469,7 @@ static bool load_core_audio(void)
LOAD_SYM(AudioConverterSetProperty);
LOAD_SYM(AudioConverterFillComplexBuffer);
LOAD_SYM(AudioFormatGetProperty);
LOAD_SYM(AudioFormatGetPropertyInfo);
#undef LOAD_SYM
return true;