#include "system/log.h"
#include "system/lt.h"
#include "system/nth_alloc.h"
+#include "config.h"
-// TODO(#863): Sound_samples is not implemented
+// TODO(#1022): Sound_samples does not implement volume control.
struct Sound_samples
{
Lt *lt;
+ SDL_AudioDeviceID dev;
+ uint8_t **audio_buf_array;
+ uint32_t *audio_buf_size_array;
+ uint8_t **active_audio_buf_array;
size_t samples_count;
int paused;
+ float volume;
+ // TODO(#1127): A better solution for optional sound support
+ int failed; // This is hackish
};
+static
+int init_buffer_and_device(Sound_samples *sound_samples,
+ const char *sample_files[])
+{
+ // TODO(#1023): init_buffer_and_device uses hard-coded audio specification
+ SDL_AudioSpec destination_spec = { // stereo float32 44100Hz
+ .format = AUDIO_F32,
+ .channels = 2,
+ .freq = 44100
+ };
+ // TODO(#1024): a return value by SDL_GetNumAudioDevices that is <= 0 may not indicate an error
+ if (SDL_GetNumAudioDevices(0) <= 0) {
+ log_fail("No audio in 2019 LULW\n");
+ return -1;
+ }
+
+ sound_samples->audio_buf_array = PUSH_LT(sound_samples->lt, nth_calloc(sound_samples->samples_count, sizeof(uint8_t*)), free);
+ if (sound_samples->audio_buf_array == NULL) {
+ log_fail("Failed to allocate memory for audio buffer pointer array\n");
+ return -1;
+ }
+ sound_samples->audio_buf_size_array = PUSH_LT(sound_samples->lt, nth_calloc(sound_samples->samples_count, sizeof(uint32_t)), free);
+ if (sound_samples->audio_buf_size_array == NULL) {
+ log_fail("Failed to allocate memory for audio buffer size array\n");
+ return -1;
+ }
+ for (size_t i = 0; i < sound_samples->samples_count; ++i) {
+ uint8_t *wav_buf; uint32_t wav_buf_len; SDL_AudioSpec wav_spec;
+
+ log_info("Loading audio file %s...\n", sample_files[i]);
+ if (SDL_LoadWAV(sample_files[i], &wav_spec, &wav_buf, &wav_buf_len) == NULL) {
+ log_fail("Load WAV file failed: %s\n", SDL_GetError());
+ return -1;
+ }
+ PUSH_LT(sound_samples->lt, wav_buf, SDL_FreeWAV);
+ SDL_AudioCVT cvt;
+ int result = SDL_BuildAudioCVT(&cvt, wav_spec.format, (uint8_t)wav_spec.channels, (int)wav_spec.freq,
+ destination_spec.format, (uint8_t)destination_spec.channels, (int)destination_spec.freq);
+ if (result < 0) {
+ log_fail("SDL_BuildAudioCVT failed: %s\n", SDL_GetError());
+ return -1;
+ } else if (result == 0) { // no need to do conversion
+ sound_samples->audio_buf_array[i] = wav_buf;
+ sound_samples->audio_buf_size_array[i] = wav_buf_len;
+ } else {
+ cvt.len = (int)wav_buf_len;
+ cvt.buf = PUSH_LT(sound_samples->lt, malloc((size_t)(cvt.len * cvt.len_mult)), free);
+ if (cvt.buf == NULL) {
+ log_fail("Allocating buffer for conversion failed\n");
+ return -1;
+ }
+ memcpy(cvt.buf, wav_buf, (size_t)cvt.len);
+ SDL_FreeWAV(RELEASE_LT(sound_samples->lt, wav_buf));
+ if (SDL_ConvertAudio(&cvt) < 0) {
+ log_fail("SDL_ConvertAudio failed: %s\n", SDL_GetError());
+ return -1;
+ }
+ sound_samples->audio_buf_array[i] = cvt.buf;
+ sound_samples->audio_buf_size_array[i] = (uint32_t)cvt.len_cvt;
+ }
+ }
+
+ /* Allocating active audio buffer location*/
+ //TODO(#1072): Allocate one huge active audio buffer with length of the maximum of all audio buffer, instead of one active buffer for each audio
+ sound_samples->active_audio_buf_array = PUSH_LT(sound_samples->lt, nth_calloc(sound_samples->samples_count, sizeof(uint8_t*)), free);
+ if (sound_samples->active_audio_buf_array == NULL) {
+ log_fail("Failed to allocate memory for active audio buffer pointer array\n");
+ return -1;
+ }
+ for (size_t i = 0; i < sound_samples->samples_count; ++i) {
+ sound_samples->active_audio_buf_array[i] = PUSH_LT(sound_samples->lt, nth_calloc(sound_samples->audio_buf_size_array[i],
+ sizeof(uint8_t)), free);
+ if (sound_samples->active_audio_buf_array == NULL) {
+ log_fail("Failed to allocate memory for active audio buffer array\n");
+ return -1;
+ }
+ }
+
+ /* Opening the device*/
+ sound_samples->dev = SDL_OpenAudioDevice(NULL, 0, &destination_spec, NULL, 0);
+ if (sound_samples->dev == 0) {
+ log_fail("SDL_OpenAudioDevice failed: %s\n", SDL_GetError());
+ log_info("The audio device may not support the hardcoded format\n");
+ return -1;
+ }
+ log_info("Audio device ID %u opened\n", sound_samples->dev);
+ return 0;
+}
+
Sound_samples *create_sound_samples(const char *sample_files[],
size_t sample_files_count)
{
RETURN_LT(lt, NULL);
}
sound_samples->lt = lt;
+ sound_samples->volume = SOUND_SAMPLES_DEFAULT_VOLUME;
sound_samples->samples_count = sample_files_count;
+ if (init_buffer_and_device(sound_samples, sample_files) < 0) {
+ log_fail("init_buffer_and_device failed\n");
+ sound_samples->failed = 1;
+ }
+
sound_samples->paused = 0;
+ SDL_PauseAudioDevice(sound_samples->dev, 0);
return sound_samples;
}
void destroy_sound_samples(Sound_samples *sound_samples)
{
+ // TODO(#1025): Use a seperate callback function for audio handling and pass that into SDL_OpenAudioDevice
+ if (sound_samples->failed) return;
trace_assert(sound_samples);
+ trace_assert(sound_samples->dev);
+ SDL_CloseAudioDevice(sound_samples->dev);
RETURN_LT0(sound_samples->lt);
}
size_t sound_index)
{
trace_assert(sound_samples);
- (void) sound_index;
+ if (sound_samples->failed) return 0;
+ trace_assert(sound_index < sound_samples->samples_count);
+ trace_assert(sound_samples->dev);
+
+ /* Premix the audio volume */
+ memset(sound_samples->active_audio_buf_array[sound_index], 0, sound_samples->audio_buf_size_array[sound_index]);
+
+ //TODO(#1073): replace this linear scaling volume with logarithmic scale for better audio perception
+ SDL_MixAudioFormat(sound_samples->active_audio_buf_array[sound_index],
+ sound_samples->audio_buf_array[sound_index],
+ AUDIO_F32, //Hardcoded format just like in issue #1023
+ sound_samples->audio_buf_size_array[sound_index],
+ (int)((float)SDL_MIX_MAXVOLUME * sound_samples->volume / 100.0f));
+
+ /* Play the audio*/
+ SDL_ClearQueuedAudio(sound_samples->dev);
+ if (SDL_QueueAudio(sound_samples->dev, sound_samples->active_audio_buf_array[sound_index],
+ sound_samples->audio_buf_size_array[sound_index]) < 0) {
+ log_warn("Failed to queue audio data of sound index %zu to device: %s\n", sound_index, SDL_GetError());
+ return 0;
+ }
+ SDL_PauseAudioDevice(sound_samples->dev, 0);
return 0;
}
int sound_samples_toggle_pause(Sound_samples *sound_samples)
{
trace_assert(sound_samples);
+ if (sound_samples->failed) return 0;
sound_samples->paused = !sound_samples->paused;
+ trace_assert(sound_samples->dev);
+ SDL_PauseAudioDevice(sound_samples->dev, sound_samples->paused);
return 0;
}
+
+void sound_samples_update_volume(Sound_samples *sound_samples,
+ float volume)
+{
+ trace_assert(sound_samples);
+ if (sound_samples->failed) return;
+ sound_samples->volume = volume;
+}
projects / nothing.git / blobdiff