Add looping example.

2026-04-22 00:06:59 +02:00 · 2020-05-29 19:50:04 +10:00
parent 8de49326d4
commit 967174368e
1 changed files with 75 additions and 0 deletions
@@ -0,0 +1,75 @@
+#define DR_FLAC_IMPLEMENTATION
+#include "../extras/dr_flac.h"  /* Enables FLAC decoding. */
+#define DR_MP3_IMPLEMENTATION
+#include "../extras/dr_mp3.h"   /* Enables MP3 decoding. */
+#define DR_WAV_IMPLEMENTATION
+#include "../extras/dr_wav.h"   /* Enables WAV decoding. */
+
+#define MINIAUDIO_IMPLEMENTATION
+#include "../miniaudio.h"
+
+#include <stdio.h>
+
+void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
+{
+    ma_bool32 isLooping = MA_TRUE;
+
+    ma_decoder* pDecoder = (ma_decoder*)pDevice->pUserData;
+    if (pDecoder == NULL) {
+        return;
+    }
+
+    /*
+    A decoder is a data source which means you can seemlessly plug it into the ma_data_source API. We can therefore take advantage of the "loop" parameter
+    of ma_data_source_read_pcm_frames() to handle looping for us.
+    */
+    ma_data_source_read_pcm_frames(pDecoder, pOutput, frameCount, isLooping);
+
+    (void)pInput;
+}
+
+int main(int argc, char** argv)
+{
+    ma_result result;
+    ma_decoder decoder;
+    ma_device_config deviceConfig;
+    ma_device device;
+
+    if (argc < 2) {
+        printf("No input file.\n");
+        return -1;
+    }
+
+    result = ma_decoder_init_file(argv[1], NULL, &decoder);
+    if (result != MA_SUCCESS) {
+        return -2;
+    }
+
+    deviceConfig = ma_device_config_init(ma_device_type_playback);
+    deviceConfig.playback.format   = decoder.outputFormat;
+    deviceConfig.playback.channels = decoder.outputChannels;
+    deviceConfig.sampleRate        = decoder.outputSampleRate;
+    deviceConfig.dataCallback      = data_callback;
+    deviceConfig.pUserData         = &decoder;
+
+    if (ma_device_init(NULL, &deviceConfig, &device) != MA_SUCCESS) {
+        printf("Failed to open playback device.\n");
+        ma_decoder_uninit(&decoder);
+        return -3;
+    }
+
+    if (ma_device_start(&device) != MA_SUCCESS) {
+        printf("Failed to start playback device.\n");
+        ma_device_uninit(&device);
+        ma_decoder_uninit(&decoder);
+        return -4;
+    }
+
+    printf("Press Enter to quit...");
+    getchar();
+
+    ma_device_uninit(&device);
+    ma_decoder_uninit(&decoder);
+
+    return 0;
+}