Refactor audio and texture into own files

2024-10-13 22:43:33 +08:00
parent 92d3e150cb
commit 64195dd5a9
7 changed files with 293 additions and 259 deletions
@@ -0,0 +1,130 @@
+#include "audio.h"
+#include "log.h"
+
+const int MAX_RECORDING_SECONDS = 1;
+
+static SDL_AudioSpec recording_spec;
+static SDL_AudioSpec playback_spec;
+static SDL_AudioSpec received_recording_spec;
+static SDL_AudioSpec received_playback_spec;
+
+int audio_init(audio_state* state)
+{
+	state->recording_device_id = 0;
+	state->playback_device_id = 0;
+
+	SDL_zero(recording_spec);
+	recording_spec.freq = 44100;
+	recording_spec.format = AUDIO_S16;
+	recording_spec.channels = 2;
+	recording_spec.samples = 4096;
+	recording_spec.callback = audio_recording_callback;
+	recording_spec.userdata = state;
+
+	SDL_zero(playback_spec);
+	playback_spec.freq = 44100;
+	playback_spec.format = AUDIO_S16;
+	playback_spec.channels = 2;
+	playback_spec.samples = 4096;
+	playback_spec.callback = audio_playback_callback;
+	playback_spec.userdata = state;
+
+	state->recording_buffer = NULL;
+	state->recording_buffer_size = 0;
+	state->recording_buffer_position = 0;
+
+	return 1;
+}
+
+int audio_recording_init(audio_state* state, int index)
+{
+	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;
+	}
+	state->recording_device_id = device_id;
+
+	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;
+	state->recording_buffer_size = MAX_RECORDING_SECONDS * bytes_per_second;
+
+	if (state->recording_buffer) free(state->recording_buffer);
+	state->recording_buffer = malloc(state->recording_buffer_size);
+	memset(state->recording_buffer, 0, state->recording_buffer_size);
+
+	return 1;
+}
+
+void audio_destroy(audio_state* state)
+{
+	free(state->recording_buffer);
+	SDL_CloseAudioDevice(state->recording_device_id);
+	SDL_CloseAudioDevice(state->playback_device_id);
+}
+
+int audio_playback_init(audio_state* state)
+{
+	if (!state->recording_buffer) {
+		printf("Audio buffer not initialized");
+		return 0;
+	}
+
+	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;
+	}
+	state->playback_device_id = device_id;
+
+	return 1;
+}
+
+void audio_recording_callback(void* userdata, Uint8* stream, int len)
+{
+	char string[64];
+	audio_state* state = userdata;
+
+	int space_left = state->recording_buffer_size - state->recording_buffer_position;
+	if (space_left <= 0) {
+		sprintf(string, "Stopping recording ID: %i", state->recording_device_id);
+		log_message(LOG_INFO, string);
+		SDL_PauseAudioDevice(state->recording_device_id, 1);
+		return;
+	}
+
+	if (len > space_left) {
+		len = space_left;
+	}
+
+	memcpy(&state->recording_buffer[state->recording_buffer_position], stream, len);
+	state->recording_buffer_position += len;
+
+	sprintf(string, "Record pos: %u/%u (%u)", state->recording_buffer_position, state->recording_buffer_size, len);
+	log_message(LOG_INFO, string);
+}
+
+void audio_playback_callback(void* userdata, Uint8* stream, int len)
+{
+	char string[64];
+	audio_state* state = userdata;
+
+	int space_left = state->recording_buffer_size - state->recording_buffer_position;
+	if (space_left <= 0) {
+		sprintf(string, "Stopping playback ID: %i", state->recording_device_id);
+		log_message(LOG_INFO, string);
+		SDL_PauseAudioDevice(state->playback_device_id, 1);
+		return;
+	}
+
+	if (len > space_left) {
+		len = space_left;
+	}
+
+	memcpy(stream, &state->recording_buffer[state->recording_buffer_position], len);
+	state->recording_buffer_position += len;
+
+	sprintf(string, "Playback pos: %u/%u (%u)", state->recording_buffer_position, state->recording_buffer_size, len);
+	log_message(LOG_INFO, string);
+}