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author | Kelebek1 <eeeedddccc@hotmail.co.uk> | 2023-08-31 16:09:15 +0200 |
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committer | Liam <byteslice@airmail.cc> | 2023-09-16 17:56:25 +0200 |
commit | 67e2d5c28b8423c4f3f1d5b00f87325684158a6f (patch) | |
tree | e419a2bb6c064ddc69a49046705b6187772fee48 /src/audio_core/adsp/apps/opus/opus_decode_object.cpp | |
parent | Merge pull request #11519 from german77/system-policy (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/audio_core/adsp/apps/opus/opus_decode_object.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/audio_core/adsp/apps/opus/opus_decode_object.cpp b/src/audio_core/adsp/apps/opus/opus_decode_object.cpp new file mode 100644 index 000000000..2c16d3769 --- /dev/null +++ b/src/audio_core/adsp/apps/opus/opus_decode_object.cpp @@ -0,0 +1,107 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "audio_core/adsp/apps/opus/opus_decode_object.h"
+#include "common/assert.h"
+
+namespace AudioCore::ADSP::OpusDecoder {
+namespace {
+bool IsValidChannelCount(u32 channel_count) {
+ return channel_count == 1 || channel_count == 2;
+}
+} // namespace
+
+u32 OpusDecodeObject::GetWorkBufferSize(u32 channel_count) {
+ if (!IsValidChannelCount(channel_count)) {
+ return 0;
+ }
+ return static_cast<u32>(sizeof(OpusDecodeObject)) + opus_decoder_get_size(channel_count);
+}
+
+OpusDecodeObject& OpusDecodeObject::Initialize(u64 buffer, u64 buffer2) {
+ auto* new_decoder = reinterpret_cast<OpusDecodeObject*>(buffer);
+ auto* comparison = reinterpret_cast<OpusDecodeObject*>(buffer2);
+
+ if (new_decoder->magic == DecodeObjectMagic) {
+ if (!new_decoder->initialized ||
+ (new_decoder->initialized && new_decoder->self == comparison)) {
+ new_decoder->state_valid = true;
+ }
+ } else {
+ new_decoder->initialized = false;
+ new_decoder->state_valid = true;
+ }
+ return *new_decoder;
+}
+
+s32 OpusDecodeObject::InitializeDecoder(u32 sample_rate, u32 channel_count) {
+ if (!state_valid) {
+ return OPUS_INVALID_STATE;
+ }
+
+ if (initialized) {
+ return OPUS_OK;
+ }
+
+ // Unfortunately libopus does not expose the OpusDecoder struct publicly, so we can't include
+ // it in this class. Nintendo does not allocate memory, which is why we have a workbuffer
+ // provided.
+ // We could use _create and have libopus allocate it for us, but then we have to separately
+ // track which decoder is being used between this and multistream in order to call the correct
+ // destroy from the host side.
+ // This is a bit cringe, but is safe as these objects are only ever initialized inside the given
+ // workbuffer, and GetWorkBufferSize will guarantee there's enough space to follow.
+ decoder = (LibOpusDecoder*)(this + 1);
+ s32 ret = opus_decoder_init(decoder, sample_rate, channel_count);
+ if (ret == OPUS_OK) {
+ magic = DecodeObjectMagic;
+ initialized = true;
+ state_valid = true;
+ self = this;
+ final_range = 0;
+ }
+ return ret;
+}
+
+s32 OpusDecodeObject::Shutdown() {
+ if (!state_valid) {
+ return OPUS_INVALID_STATE;
+ }
+
+ if (initialized) {
+ magic = 0x0;
+ initialized = false;
+ state_valid = false;
+ self = nullptr;
+ final_range = 0;
+ decoder = nullptr;
+ }
+ return OPUS_OK;
+}
+
+s32 OpusDecodeObject::ResetDecoder() {
+ return opus_decoder_ctl(decoder, OPUS_RESET_STATE);
+}
+
+s32 OpusDecodeObject::Decode(u32& out_sample_count, u64 output_data, u64 output_data_size,
+ u64 input_data, u64 input_data_size) {
+ ASSERT(initialized);
+ out_sample_count = 0;
+
+ if (!state_valid) {
+ return OPUS_INVALID_STATE;
+ }
+
+ auto ret_code_or_samples = opus_decode(
+ decoder, reinterpret_cast<const u8*>(input_data), static_cast<opus_int32>(input_data_size),
+ reinterpret_cast<opus_int16*>(output_data), static_cast<opus_int32>(output_data_size), 0);
+
+ if (ret_code_or_samples < OPUS_OK) {
+ return ret_code_or_samples;
+ }
+
+ out_sample_count = ret_code_or_samples;
+ return opus_decoder_ctl(decoder, OPUS_GET_FINAL_RANGE_REQUEST, &final_range);
+}
+
+} // namespace AudioCore::ADSP::OpusDecoder
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