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gui/(bgm player & themes): Add support of BGM.
- Some small improvement and comment added. config & gui/settings dialog: Add control of bgm volume. - Change start screen delay min to 30 sec and max to 5 min. codec: Set default value to 0 for send of atrac 9.
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| Original file line number | Diff line number | Diff line change |
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| // Vita3K emulator project | ||
| // Copyright (C) 2024 Vita3K team | ||
| // | ||
| // This program 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. | ||
| // | ||
| // This program 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 this program; if not, write to the Free Software Foundation, Inc., | ||
| // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
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| #include "private.h" | ||
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| #include <audio/state.h> | ||
| #include <codec/state.h> | ||
| #include <cubeb/cubeb.h> | ||
| #include <gui/functions.h> | ||
| #include <io/VitaIoDevice.h> | ||
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| namespace gui { | ||
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| // Structure to store PCM data | ||
| struct PcmData { | ||
| std::vector<uint8_t> data; | ||
| uint32_t position; | ||
| std::mutex mutex; | ||
| }; | ||
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| static long data_callback(cubeb_stream *stream, void *user_ptr, const void *input_buffer, void *output_buffer, long nframes) { | ||
| PcmData *pcm = static_cast<PcmData *>(user_ptr); | ||
| // Lock the mutex to access pcm->position and pcm->data | ||
| std::lock_guard<std::mutex> lock(pcm->mutex); | ||
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| // Calculate the number of bytes to copy (2 bytes per sample, 2 channels) and the length of the PCM data | ||
| const uint32_t bytes_to_copy = nframes * 2 * sizeof(uint16_t); | ||
| const uint32_t length = pcm->data.size(); | ||
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| // If we reach the end of the buffer, return to zero (loop) | ||
| if (pcm->position >= length) | ||
| pcm->position = 0; | ||
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| // Calculate how much data is left to copy | ||
| const size_t bytes_to_copy_now = std::min(bytes_to_copy, length - pcm->position); | ||
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| // Copy the PCM data into the output buffer | ||
| std::memcpy(output_buffer, pcm->data.data() + pcm->position, bytes_to_copy_now); | ||
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| // Update the position | ||
| pcm->position += bytes_to_copy_now; | ||
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| // If we copied less data than the buffer, fill the rest with silence | ||
| if (bytes_to_copy_now < bytes_to_copy) | ||
| std::memset((uint8_t *)output_buffer + bytes_to_copy_now, 0, bytes_to_copy - bytes_to_copy_now); | ||
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| // Return the number of frames copied | ||
| return nframes; | ||
| } | ||
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| // Callback called when the stream state changes | ||
| void state_callback(cubeb_stream *stream, void *user_ptr, cubeb_state state) { | ||
| switch (state) { | ||
| case CUBEB_STATE_DRAINED: | ||
| LOG_INFO("Playback drained."); | ||
| break; | ||
| case CUBEB_STATE_ERROR: | ||
| LOG_ERROR("Playback error."); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
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| std::thread playback_handle_thread; | ||
| cubeb_stream *stream = nullptr; | ||
| bool stop_requested; | ||
| std::condition_variable stop_condition; | ||
| cubeb *ctx = nullptr; | ||
| PcmData pcm_data; | ||
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| void stop_bgm() { | ||
| if (!stream) { | ||
| return; | ||
| } | ||
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| { | ||
| // We lock the mutex to protect access to stop_requested | ||
| std::lock_guard<std::mutex> lock(pcm_data.mutex); | ||
| stop_requested = true; | ||
| } | ||
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| // Notify the condition to wake up the thread | ||
| stop_condition.notify_one(); | ||
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| // Wait for the playback handle thread to finish | ||
| if (playback_handle_thread.joinable()) | ||
| playback_handle_thread.join(); | ||
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| // Stop and destroy the stream | ||
| cubeb_stream_stop(stream); | ||
| cubeb_stream_destroy(stream); | ||
| stream = nullptr; | ||
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| // Reset the stop indicator | ||
| stop_requested = false; | ||
| } | ||
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| void switch_bgm_state(const bool pause) { | ||
| if (!stream) { | ||
| LOG_ERROR("The background music stream is not initialized!"); | ||
| return; | ||
| } | ||
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| if (pause) | ||
| cubeb_stream_stop(stream); | ||
| else | ||
| cubeb_stream_start(stream); | ||
| } | ||
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| void set_bgm_volume(const float vol) { | ||
| if (!stream) { | ||
| LOG_ERROR("The background music stream is not initialized!"); | ||
| return; | ||
| } | ||
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| cubeb_stream_set_volume(stream, vol / 100.f); | ||
| } | ||
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| static void pcm_playback_handle_thread() { | ||
| std::unique_lock<std::mutex> lock(pcm_data.mutex); | ||
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| // Wait until stop is requested | ||
| stop_condition.wait(lock, [] { return stop_requested; }); | ||
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| // Destroy the context | ||
| cubeb_destroy(ctx); | ||
| } | ||
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| void init_bgm_player(const float vol) { | ||
| // Create a new Cubeb context | ||
| if (cubeb_init(&ctx, "BGM Player", nullptr) != CUBEB_OK) { | ||
| LOG_ERROR("Failed to initialize Cubeb context"); | ||
| return; | ||
| } | ||
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| // Configure the audio output parameters | ||
| cubeb_stream_params output_params; | ||
| output_params.format = CUBEB_SAMPLE_S16LE; // Format PCM 16-bit, little-endian | ||
| output_params.rate = 48000; // Sample rate 48 kHz | ||
| output_params.channels = 2; // Stereo | ||
| output_params.layout = CUBEB_LAYOUT_STEREO; | ||
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| // Get the minimum latency for the output parameters | ||
| uint32_t latency; | ||
| cubeb_get_min_latency(ctx, &output_params, &latency); | ||
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| // Lock the mutex to protect initialization of the Cubeb stream | ||
| std::lock_guard<std::mutex> lock(pcm_data.mutex); | ||
| if (cubeb_stream_init(ctx, &stream, "BGM Stream", nullptr, nullptr, | ||
| nullptr, &output_params, latency, data_callback, state_callback, &pcm_data) | ||
| != CUBEB_OK) { | ||
| LOG_ERROR("Failed to initialize Cubeb stream"); | ||
| return; | ||
| } | ||
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| set_bgm_volume(vol); | ||
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| // Start playback in a new thread | ||
| playback_handle_thread = std::thread(pcm_playback_handle_thread); | ||
| } | ||
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| struct RiffHeader { | ||
| unsigned char chunk_id[4]; // Identifier for the "RIFF" chunk | ||
| uint32_t chunk_size; // Size of the chunk | ||
| unsigned char format[4]; // Format of the file | ||
| }; | ||
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| struct FmtChunk { | ||
| unsigned char chunk_id[4]; // Identifier for the "fmt" chunk | ||
| uint32_t chunk_data_size; // Size of the chunk | ||
| uint16_t format_tag; // Format of the audio data | ||
| uint16_t num_channels; // Number of channels | ||
| uint32_t sample_rate; // Sample rate | ||
| uint32_t byte_rate; // Byte rate | ||
| uint16_t block_align; // Block alignment | ||
| uint16_t bits_per_sample; // Bits per sample | ||
| uint16_t extension_size; // Size of the extension | ||
| uint16_t samples_per_block; // Samples per block | ||
| uint32_t channel_mask; // Channel mask | ||
| char codec_id[16]; // Codec ID | ||
| uint32_t version; // Version | ||
| uint32_t config_data; // Configuration data | ||
| uint32_t reserved; // Reserved | ||
| }; | ||
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| struct FactChunk { | ||
| unsigned char chunk_id[4]; // Identifier for the "fact" chunk | ||
| uint32_t chunk_data_size; // Size of the chunk | ||
| uint32_t total_samples; // Total number of samples in the file | ||
| uint32_t input_overlap_delay; // Input overlap delay | ||
| uint32_t input_overlap_encoder_delay; // Input overlap encoder delay | ||
| }; | ||
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| struct SmplChunk { | ||
| unsigned char chunk_id[4]; // Identifier for the "smpl" chunk | ||
| uint32_t chunk_size; // Size of the chunk | ||
| uint32_t manufacturer; // Manufacturer code (MMA Manufacturer code) | ||
| uint32_t product; // Product code | ||
| uint32_t sample_period; // Period of one sample in nanoseconds | ||
| uint32_t midi_unity_note; // MIDI note to play the sample at its original pitch | ||
| uint32_t midi_pitch_fraction; // Fraction of the MIDI note | ||
| uint32_t smpte_format; // SMPTE format for synchronization | ||
| uint32_t smpte_offset; // SMPTE offset | ||
| uint32_t num_sample_loops; // Number of sample loops | ||
| uint32_t sampler_data; // Size of sampler-specific data (in bytes) | ||
| uint32_t identifier; // Unique identifier for the loop | ||
| uint32_t type; // Loop type (e.g., 0 for forward) | ||
| uint32_t start; // Loop start point (in samples) | ||
| uint32_t end; // Loop end point (in samples) | ||
| uint32_t fraction; // Fraction of a sample length for fine-tuning | ||
| uint32_t play_count; // Number of times to repeat the loop (0 for infinite) | ||
| }; | ||
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| struct DataChunk { | ||
| unsigned char chunk_id[4]; // Identifier for the "data" chunk | ||
| uint32_t size; // Size of the audio data | ||
| }; | ||
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| struct At9Header { | ||
| RiffHeader riff; | ||
| FmtChunk fmt; | ||
| FactChunk fact; | ||
| SmplChunk smpl; | ||
| DataChunk data; | ||
| }; | ||
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| // Size of the AT9 header | ||
| static constexpr uint32_t AT9_HEADER_SIZE = sizeof(At9Header); | ||
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| static bool decode_bgm(uint8_t *at9_data) { | ||
| // Get the header of the AT9 file | ||
| At9Header header; | ||
| memcpy(&header, at9_data, AT9_HEADER_SIZE); | ||
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| // Set data size | ||
| const uint32_t data_size = header.data.size; | ||
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| // Set the pointer to the ES data after the header | ||
| at9_data += AT9_HEADER_SIZE; | ||
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| // Create a new decoder with the configuration data from the AT9 header | ||
| Atrac9DecoderState decoder(header.fmt.config_data); | ||
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| const uint32_t super_frame_size = decoder.get(DecoderQuery::AT9_SUPERFRAME_SIZE); | ||
| const auto es_size_max = std::min(super_frame_size, 1024u); | ||
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| uint32_t total_bytes_read = 0; | ||
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| // Get the maximum size of the PCM buffer for a single super frame | ||
| const uint64_t max_pcm_size = static_cast<uint64_t>(decoder.get(DecoderQuery::AT9_SAMPLE_PER_FRAME) * decoder.get(DecoderQuery::CHANNELS)) * sizeof(int16_t); | ||
| std::vector<uint8_t> bgm_data; | ||
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| // Decode the AT9 data | ||
| while (total_bytes_read < data_size) { | ||
| DecoderSize size; | ||
| std::vector<uint8_t> pcm_buffer(max_pcm_size); | ||
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| // Send the data to the decoder and receive the decoded PCM data | ||
| if (!decoder.send(at9_data) | ||
| || !decoder.receive(pcm_buffer.data(), &size)) { | ||
| LOG_ERROR("Error at offset {} while sending or decoding AT9.", total_bytes_read); | ||
| return false; | ||
| } | ||
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| // Get es size used, update the total bytes read and the es data to the next super frame | ||
| const uint32_t es_size_used = std::min(decoder.get_es_size(), es_size_max); | ||
| total_bytes_read += es_size_used; | ||
| at9_data += es_size_used; | ||
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| // Get the size of the PCM data given by the decoder and insert it into the PCM data buffer | ||
| const uint64_t pcm_size_given = static_cast<uint64_t>(size.samples * decoder.get(DecoderQuery::CHANNELS)) * sizeof(int16_t); | ||
| bgm_data.insert(bgm_data.end(), pcm_buffer.begin(), pcm_buffer.begin() + pcm_size_given); | ||
| } | ||
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| // Check if PCM data is valid | ||
| if (bgm_data.empty()) { | ||
| LOG_ERROR("Error: PCM data is empty!"); | ||
| return false; | ||
| } | ||
|
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| // Change the BGM theme with the new PCM data | ||
| std::lock_guard<std::mutex> lock(pcm_data.mutex); | ||
| pcm_data.data = bgm_data; | ||
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| return true; | ||
| } | ||
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| bool init_bgm(EmuEnvState &emuenv, const std::pair<std::string, std::string> path_bgm) { | ||
| // Clear the PCM data buffer and reset the position | ||
| pcm_data.position = 0; | ||
| pcm_data.data.clear(); | ||
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| // Read the At9 file | ||
| vfs::FileBuffer at9_buffer; | ||
| const auto device = VitaIoDevice::_from_string(path_bgm.first.c_str()); | ||
| const auto path = path_bgm.second; | ||
| if (!vfs::read_file(device, at9_buffer, emuenv.pref_path, path)) { | ||
| LOG_ERROR_IF(device == VitaIoDevice::ux0, "Failed to read theme BGM file: {}:{}", path_bgm.first, path); | ||
| return false; | ||
| } | ||
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| // Decode the At9 buffer to PCM data | ||
| return decode_bgm(at9_buffer.data()); | ||
| } | ||
|
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| } // namespace gui |
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