585 lines
17 KiB
C
585 lines
17 KiB
C
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_audio.h>
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#include <stdio.h>
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/*
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* INFO: I will mark places to look at with INFO:
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*/
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const int SCREEN_WIDTH = 640;
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const int SCREEN_HEIGHT = 480;
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const int MAX_RECORDING_DEVICES = 10;
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const int MAX_RECORDING_SECONDS = 1;
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const int RECORDING_BUFFER_SECONDS = MAX_RECORDING_SECONDS + 1;
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/*
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* Application
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*/
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int init();
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void destroy();
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int select_device(SDL_KeyboardEvent* key_event, int max_index);
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typedef enum {
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SELECTING_DEVICE,
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RECORDING,
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RECORDED,
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PLAYBACK,
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} application_state;
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typedef struct {
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application_state application_state;
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int device_index;
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int recording_device_id;
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int playback_device_id;
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} state;
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void application_state_to_string(application_state state, char* string);
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/*
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* Visual
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*/
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SDL_Window* window = NULL;
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SDL_Renderer* renderer = NULL;
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//TTF_Font* global_font = NULL;
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typedef struct {
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SDL_Texture* texture;
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int width;
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int height;
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} text_texture;
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int text_texture_init(text_texture* text_texture);
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int text_texture_load(text_texture* text_texture, char* string);
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int text_texture_render(text_texture* text_texture, int x, int y);
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int text_texture_free(text_texture* text_texture);
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/*
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* Audio INFO: audio related declarations and callback here.
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*/
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int num_devices = 0;
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int num_recdevices = 0;
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int num_playdevices = 0;
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SDL_AudioSpec recording_spec;
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SDL_AudioSpec playback_spec;
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SDL_AudioSpec received_recording_spec;
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SDL_AudioSpec received_playback_spec;
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Uint8* recording_buffer = NULL;
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unsigned int recording_buffer_size = 0;
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unsigned int recording_buffer_position = 0;
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unsigned int recording_buffer_position_max = 0;
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SDL_AudioDeviceID audio_recording_init(int index, void* userdata);
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SDL_AudioDeviceID audio_playback_init(void* userdata);
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void audio_buffer_destroy();
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void audio_recording_callback( void* userdata, Uint8* stream, int len );
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void audio_playback_callback( void* userdata, Uint8* stream, int len );
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void handle_input(SDL_Event* event, state* state);
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void handle_task(state* state);
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//Recording data buffer
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Uint8* gRecordingBuffer = NULL;
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//Size of data buffer
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Uint32 gBufferByteSize = 0;
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//Position in data buffer
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Uint32 gBufferBytePosition = 0;
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void audioRecordingCallback(void* userdata, Uint8* stream, int len )
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{
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memcpy(&gRecordingBuffer[ gBufferBytePosition ], stream, len);
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gBufferBytePosition += len;
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printf("recording\n");
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}
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void audioPlaybackCallback(void* userdata, Uint8* stream, int len )
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{
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memcpy(stream, &gRecordingBuffer[ gBufferBytePosition ], len);
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gBufferBytePosition += len;
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printf("playback\n");
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}
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int main(int argc, char* argv[])
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{
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SDL_AudioDeviceID recordingDeviceId = 0;
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SDL_AudioDeviceID playbackDeviceId = 0;
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SDL_AudioSpec gReceivedRecordingSpec;
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SDL_AudioSpec gReceivedPlaybackSpec;
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SDL_AudioSpec desiredRecordingSpec;
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SDL_zero(desiredRecordingSpec);
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desiredRecordingSpec.freq = 44100;
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desiredRecordingSpec.format = AUDIO_S16;
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desiredRecordingSpec.channels = 2;
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desiredRecordingSpec.samples = 4096;
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desiredRecordingSpec.callback = audioRecordingCallback;
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SDL_AudioSpec desiredPlaybackSpec;
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SDL_zero(desiredPlaybackSpec);
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desiredPlaybackSpec.freq = 44100;
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desiredPlaybackSpec.format = AUDIO_S16; // AUDIO_F32;
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desiredPlaybackSpec.channels = 2;
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desiredPlaybackSpec.samples = 4096;
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desiredPlaybackSpec.callback = audioPlaybackCallback;
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//Maximum position in data buffer for recording
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Uint32 gBufferByteMaxPosition = 0;
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if (!init()) return 1;
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printf("Audio Driver: %s\n", SDL_GetCurrentAudioDriver());
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num_recdevices = SDL_GetNumAudioDevices(1);
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if(num_recdevices < 1) {
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printf( "Unable to get audio capture device! SDL Error: %s\n", SDL_GetError() );
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return 0;
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}
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printf("Num audio recording devices: %i\n", num_recdevices);
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for(int i = 0; i < num_recdevices; ++i) {
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const char* deviceName = SDL_GetAudioDeviceName(i, 1);
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printf("REC: %d - %s\n", i, deviceName);
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}
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num_playdevices = SDL_GetNumAudioDevices(0);
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if(num_playdevices < 1) {
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printf( "Unable to get audio playback device! SDL Error: %s\n", SDL_GetError() );
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return 0;
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}
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printf("Num audio playback devices: %i\n", num_playdevices);
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for(int i = 0; i < num_recdevices; ++i) {
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const char* deviceName = SDL_GetAudioDeviceName(i, 0);
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printf("PBK: %d - %s\n", i, deviceName);
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}
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recordingDeviceId = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(2, SDL_TRUE), SDL_TRUE, &desiredRecordingSpec, &gReceivedRecordingSpec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
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if(recordingDeviceId == 0) {
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printf("Failed to open recording device! SDL Error: %s", SDL_GetError() );
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return 1;
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}
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int bytesPerSample = gReceivedRecordingSpec.channels * (SDL_AUDIO_BITSIZE(gReceivedRecordingSpec.format) / 8);
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int bytesPerSecond = gReceivedRecordingSpec.freq * bytesPerSample;
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gBufferByteSize = RECORDING_BUFFER_SECONDS * bytesPerSecond;
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gBufferByteMaxPosition = MAX_RECORDING_SECONDS * bytesPerSecond;
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printf("bytesPerSample %d, bytesPerSecond %d\n", bytesPerSample,bytesPerSecond);
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printf("gBufferByteSize %d, gBufferByteMaxPosition %d\n", gBufferByteSize,gBufferByteMaxPosition);
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playbackDeviceId = SDL_OpenAudioDevice( NULL, 0, &desiredPlaybackSpec, &gReceivedPlaybackSpec, SDL_AUDIO_ALLOW_FORMAT_CHANGE );
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if(playbackDeviceId == 0) {
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printf("Failed to open playback device! SDL Error: %s", SDL_GetError());
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return 1;
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}
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gRecordingBuffer = malloc(gBufferByteSize);
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memset(gRecordingBuffer, 0, gBufferByteSize);
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gBufferBytePosition = 0;
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SDL_Delay(100);
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SDL_PauseAudioDevice( recordingDeviceId, SDL_FALSE );
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while(1) {
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SDL_LockAudioDevice( recordingDeviceId );
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if(gBufferBytePosition > gBufferByteMaxPosition) {
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printf("end\n");
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SDL_UnlockAudioDevice( recordingDeviceId );
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SDL_PauseAudioDevice( recordingDeviceId, SDL_TRUE );
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break;
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//} else {
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// printf("bufferPos %d\n",gBufferBytePosition);
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}
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SDL_UnlockAudioDevice( recordingDeviceId );
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}
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printf("playback\n");
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gBufferBytePosition = 0;
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SDL_PauseAudioDevice(playbackDeviceId, 0);
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while(1) {
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SDL_LockAudioDevice(playbackDeviceId);
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if(gBufferBytePosition > gBufferByteMaxPosition) {
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printf("end\n");
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SDL_UnlockAudioDevice(playbackDeviceId);
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SDL_PauseAudioDevice(playbackDeviceId, SDL_TRUE);
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break;
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}
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SDL_UnlockAudioDevice(playbackDeviceId);
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}
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cleanup:
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printf("1\n");
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free(gRecordingBuffer);
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printf("2\n");
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SDL_CloseAudioDevice(recordingDeviceId);
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printf("3\n");
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destroy();
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printf("4\n");
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return 0;
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}
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void handle_input(SDL_Event* event, state* state)
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{
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SDL_Keycode keysym = event->key.keysym.sym;
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switch (state->application_state) {
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// INFO: init of recording audio device here
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case SELECTING_DEVICE:
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switch (keysym) {
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case SDLK_y:
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case SDLK_RETURN:
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// INFO: init audio device here and below
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// Here it initialises everytime you press enter or y, and
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// unpauses device immediately. Seems to work mor consistently
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SDL_CloseAudioDevice(state->recording_device_id);
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state->recording_device_id =
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audio_recording_init(state->device_index, NULL);
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if (state->device_index == -1 || !state->recording_device_id) break;
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recording_buffer_position = 0;
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// INFO: calling this should unpause the device and start calling the callback
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SDL_PauseAudioDevice(state->recording_device_id, 0);
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/*SDL_UnlockAudioDevice(state->recording_device_id);*/
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// INFO: state change looks like this here
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state->application_state = RECORDING;
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break;
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case SDLK_ESCAPE:
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state->device_index = -1;
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SDL_CloseAudioDevice(state->recording_device_id);
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break;
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}
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int device_index_new = select_device(&event->key, num_devices);
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if (device_index_new == -1) break;
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if (state->device_index != -1 && device_index_new == -1) break;
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state->device_index = device_index_new;
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// INFO: inititialising here seems to be less consistent. When I
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// spam enter or y after initialising here, Sometimes I see
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// callback being called sometimes not.
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/*SDL_CloseAudioDevice(state->recording_device_id);*/
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/*state->recording_device_id = audio_recording_init(state->device_index, NULL);*/
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break;
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case RECORDING:
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switch (keysym) {
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case SDLK_y:
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SDL_PauseAudioDevice(state->recording_device_id, 0);
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break;
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case SDLK_q:
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case SDLK_ESCAPE:
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SDL_PauseAudioDevice(state->recording_device_id, 1);
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audio_buffer_destroy();
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state->application_state = SELECTING_DEVICE;
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break;
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}
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break;
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// INFO: init of playback audio device here. Can't seem to get it to play / call callback
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case RECORDED:
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switch (keysym) {
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case SDLK_y:
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case SDLK_RETURN:
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SDL_CloseAudioDevice(state->playback_device_id);
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state->playback_device_id = audio_playback_init(NULL);
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recording_buffer_position = 0;
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SDL_PauseAudioDevice(state->playback_device_id, 0);
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/*SDL_UnlockAudioDevice(state->playback_device_id);*/
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state->application_state = PLAYBACK;
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break;
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case SDLK_q:
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case SDLK_ESCAPE:
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audio_buffer_destroy();
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state->application_state = SELECTING_DEVICE;
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break;
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}
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break;
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case PLAYBACK:
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switch (keysym) {
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case SDLK_q:
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case SDLK_ESCAPE:
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state->application_state = RECORDED;
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break;
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}
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break;
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}
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}
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void handle_task(state* state)
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{
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switch (state->application_state) {
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case SELECTING_DEVICE:
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break;
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case RECORDING:
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// INFO: check buffer position here and stop if reaces the end
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SDL_LockAudioDevice(state->recording_device_id);
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/*printf("buf pos: %u\n", recording_buffer_position);*/
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if (recording_buffer_position >= recording_buffer_position_max) {
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SDL_UnlockAudioDevice(state->recording_device_id);
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SDL_PauseAudioDevice(state->recording_device_id, 1);
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SDL_CloseAudioDevice(state->recording_device_id);
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state->application_state = RECORDED;
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break;
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}
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SDL_UnlockAudioDevice(state->recording_device_id);
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break;
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case RECORDED:
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break;
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case PLAYBACK:
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// INFO:
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SDL_LockAudioDevice(state->playback_device_id);
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if (recording_buffer_position >= recording_buffer_position_max) {
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SDL_UnlockAudioDevice(state->playback_device_id);
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SDL_PauseAudioDevice(state->playback_device_id, 1);
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SDL_CloseAudioDevice(state->playback_device_id);
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state->application_state = RECORDED;
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break;
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}
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SDL_UnlockAudioDevice(state->playback_device_id);
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break;
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}
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}
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int init()
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{
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//if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
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int nRet=0;
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nRet = SDL_Init(SDL_INIT_AUDIO);
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if (nRet < 0) {
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printf("SDL could not initialize! SDL Error: %s\n", SDL_GetError());
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return 0;
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}
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printf("SDL initialized: %d %s\n",nRet, SDL_GetError());
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// if (TTF_Init() == -1) {
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// printf("TTF could not initialize! TTF Error: %s\n", TTF_GetError());
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// return 0;
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// }
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// window = SDL_CreateWindow("SDL record", SDL_WINDOWPOS_UNDEFINED,
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// SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
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// SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
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// if (!window) {
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// printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
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// return 0;
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// }
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||
|
|
// renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
|
||
|
|
// if (!renderer) {
|
||
|
|
// printf("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
|
||
|
|
// return 0;
|
||
|
|
// }
|
||
|
|
|
||
|
|
// global_font = TTF_OpenFont("FiraCode-Regular.ttf", 24);
|
||
|
|
// if (!global_font) {
|
||
|
|
// printf("Failed to load font! TTF_Error: %s\n", TTF_GetError());
|
||
|
|
// return 0;
|
||
|
|
// }
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void destroy()
|
||
|
|
{
|
||
|
|
free(recording_buffer);
|
||
|
|
|
||
|
|
//TTF_CloseFont(global_font);
|
||
|
|
//SDL_DestroyRenderer(renderer);
|
||
|
|
//SDL_DestroyWindow(window);
|
||
|
|
//TTF_Quit();
|
||
|
|
SDL_Quit();
|
||
|
|
}
|
||
|
|
|
||
|
|
int select_device(SDL_KeyboardEvent* key_event, int max_index)
|
||
|
|
{
|
||
|
|
SDL_Keycode keycode = key_event->keysym.sym;
|
||
|
|
SDL_Keycode mod = key_event->keysym.mod;
|
||
|
|
|
||
|
|
int keycode_is_num = (keycode >= SDLK_0 && keycode <= SDLK_9);
|
||
|
|
int no_mod = (mod == 0);
|
||
|
|
if (!keycode_is_num || !no_mod) {
|
||
|
|
printf("Not number: %c <%u>\n", keycode, keycode);
|
||
|
|
return -1;
|
||
|
|
} else {
|
||
|
|
printf("Is number: %c <%u>\n", keycode, keycode);
|
||
|
|
}
|
||
|
|
|
||
|
|
int index = keycode - SDLK_0;
|
||
|
|
if (index >= max_index) return -1;
|
||
|
|
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
|
||
|
|
void application_state_to_string(application_state state, char* string)
|
||
|
|
{
|
||
|
|
switch (state) {
|
||
|
|
case SELECTING_DEVICE:
|
||
|
|
sprintf(string, "Selecting Device [0-9] -> [y/RET], ");
|
||
|
|
break;
|
||
|
|
case RECORDING:
|
||
|
|
sprintf(string, "Recording");
|
||
|
|
break;
|
||
|
|
case RECORDED:
|
||
|
|
sprintf(string, "Recorded");
|
||
|
|
break;
|
||
|
|
case PLAYBACK:
|
||
|
|
sprintf(string, "Playing");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int text_texture_init(text_texture* text_texture)
|
||
|
|
{
|
||
|
|
text_texture->texture = NULL;
|
||
|
|
text_texture->width = 0;
|
||
|
|
text_texture->height = 0;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// int text_texture_load(text_texture* text_texture, char* string)
|
||
|
|
// {
|
||
|
|
// if (text_texture->texture) {
|
||
|
|
// SDL_DestroyTexture(text_texture->texture);
|
||
|
|
// text_texture->texture = NULL;
|
||
|
|
// }
|
||
|
|
|
||
|
|
// SDL_Color text_color = { 255, 255, 255 };
|
||
|
|
// SDL_Surface* text_surface = TTF_RenderText_Solid(global_font, string, text_color);
|
||
|
|
// if (!text_surface) {
|
||
|
|
// printf("Unable to render text surface! TTF_Error: %s\n", TTF_GetError());
|
||
|
|
// return 0;
|
||
|
|
// }
|
||
|
|
|
||
|
|
// SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
|
||
|
|
// if (!texture) {
|
||
|
|
// printf("Unable to create texture from rendered text! SDL_Error: %s\n", SDL_GetError());
|
||
|
|
// return 0;
|
||
|
|
// }
|
||
|
|
|
||
|
|
// text_texture->texture = SDL_CreateTextureFromSurface(renderer, text_surface);
|
||
|
|
// text_texture->width = text_surface->w;
|
||
|
|
// text_texture->height = text_surface->h;
|
||
|
|
|
||
|
|
// SDL_FreeSurface(text_surface);
|
||
|
|
// return 1;
|
||
|
|
// }
|
||
|
|
|
||
|
|
int text_texture_render(text_texture* text_texture, int x, int y)
|
||
|
|
{
|
||
|
|
if (!text_texture) {
|
||
|
|
printf("text_texture uninitialized");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (!text_texture->texture) {
|
||
|
|
printf("text_texture->texture uninitialized");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int quad_width = text_texture->width;
|
||
|
|
int quad_height = text_texture->height;
|
||
|
|
SDL_Rect render_quad = { x, y, quad_width, quad_height };
|
||
|
|
SDL_RenderCopy(renderer, text_texture->texture, NULL, &render_quad);
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int text_texture_free(text_texture* text_texture)
|
||
|
|
{
|
||
|
|
if (!text_texture->texture) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
SDL_DestroyTexture(text_texture->texture);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
// INFO: device init here
|
||
|
|
// Most of the audio stuff I copied from an example
|
||
|
|
SDL_AudioDeviceID audio_recording_init(int index, void* userdata)
|
||
|
|
{
|
||
|
|
// INFO: audio spec and callback
|
||
|
|
SDL_zero(recording_spec);
|
||
|
|
recording_spec.freq = 44100;
|
||
|
|
recording_spec.format = AUDIO_F32;
|
||
|
|
recording_spec.channels = 2;
|
||
|
|
recording_spec.samples = 4096;
|
||
|
|
recording_spec.callback = audio_recording_callback;
|
||
|
|
recording_spec.userdata = userdata;
|
||
|
|
|
||
|
|
SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(index, 1), 1, &recording_spec, &received_recording_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
|
||
|
|
printf("Recording Device: %s\n", SDL_GetAudioDeviceName(index, 1));
|
||
|
|
if (!device_id) {
|
||
|
|
printf("Failed to open recording device! SDL Error: %s", SDL_GetError());
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned int bytes_per_sample = received_recording_spec.channels * (SDL_AUDIO_BITSIZE(received_recording_spec.format)/8);
|
||
|
|
unsigned int bytes_per_second = received_recording_spec.freq * bytes_per_sample;
|
||
|
|
// INFO: I just copied example where they allocated 1 second worth of buffer so it doesn't die
|
||
|
|
recording_buffer_size = RECORDING_BUFFER_SECONDS * bytes_per_second;
|
||
|
|
recording_buffer_position_max = MAX_RECORDING_SECONDS * bytes_per_second;
|
||
|
|
|
||
|
|
recording_buffer = malloc(recording_buffer_size);
|
||
|
|
memset(recording_buffer, 0, recording_buffer_size);
|
||
|
|
|
||
|
|
return device_id;
|
||
|
|
}
|
||
|
|
// INFO:
|
||
|
|
SDL_AudioDeviceID audio_playback_init(void* userdata)
|
||
|
|
{
|
||
|
|
if (!recording_buffer) {
|
||
|
|
printf("Audio buffer not initialized");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
// INFO: audio spec and callback
|
||
|
|
SDL_zero(playback_spec);
|
||
|
|
playback_spec.freq = 44100;
|
||
|
|
playback_spec.format = AUDIO_F32;
|
||
|
|
playback_spec.channels = 2;
|
||
|
|
playback_spec.samples = 4096;
|
||
|
|
playback_spec.callback = audio_playback_callback;
|
||
|
|
playback_spec.callback = userdata;
|
||
|
|
|
||
|
|
SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(NULL, 0, &playback_spec, &received_playback_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
|
||
|
|
if (!device_id) {
|
||
|
|
printf("Failed to open playback device! SDL Error: %s", SDL_GetError());
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return device_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
int audio_device_stop(int device_id)
|
||
|
|
{
|
||
|
|
SDL_PauseAudioDevice(device_id, 1);
|
||
|
|
SDL_CloseAudioDevice(device_id);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void audio_buffer_destroy()
|
||
|
|
{
|
||
|
|
free(recording_buffer);
|
||
|
|
recording_buffer = NULL;
|
||
|
|
recording_buffer_size = 0;
|
||
|
|
recording_buffer_position = 0;
|
||
|
|
}
|
||
|
|
// INFO: callback here
|
||
|
|
void audio_recording_callback(void* userdata, Uint8* stream, int len)
|
||
|
|
{
|
||
|
|
memcpy(&recording_buffer[recording_buffer_position], stream, len);
|
||
|
|
recording_buffer_position += len;
|
||
|
|
char string[64];
|
||
|
|
sprintf(string, "Record pos: %u %u", recording_buffer_position, len);
|
||
|
|
printf(string, "Record pos: %u %u\n", recording_buffer_position, len);
|
||
|
|
}
|
||
|
|
// INFO:
|
||
|
|
void audio_playback_callback(void* userdata, Uint8* stream, int len)
|
||
|
|
{
|
||
|
|
memcpy(stream, &recording_buffer[recording_buffer_position], len);
|
||
|
|
recording_buffer_position += len;
|
||
|
|
char string[64];
|
||
|
|
sprintf(string, "Playback pos: %u %u", recording_buffer_position, len);
|
||
|
|
printf(string, "Playback pos: %u %u", recording_buffer_position, len);
|
||
|
|
}
|