Merge pull request #3 from gravgun/master

Replace lodepng by stb_image; add Vorbis banner sound import

CMakeLists.txt

@@ -3,5 +3,5 @@ project(bannertool)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 
-set(SOURCE_FILES source/main.cpp source/cmd.cpp source/pc/wav.cpp source/3ds/cbmd.cpp source/3ds/cwav.cpp source/3ds/lz11.cpp source/3ds/util.cpp source/pc/lodepng.cpp)
+set(SOURCE_FILES source/main.cpp source/cmd.cpp source/pc/wav.cpp source/3ds/cbmd.cpp source/3ds/cwav.cpp source/3ds/lz11.cpp source/3ds/util.cpp source/pc/stb_image.c source/pc/stb_vorbis.c)
 add_executable(bannertool ${SOURCE_FILES})

source/3ds/util.cpp

@@ -1,6 +1,6 @@
 #include "util.h"
 
-#include "../pc/lodepng.h"
+#include "../pc/stb_image.h"
 
 #include <stdlib.h>
 
@@ -39,9 +39,12 @@ u16 pack_color(u8 r, u8 g, u8 b, u8 a, PixelFormat format) {
 
 u8* load_image(const char* image, u32 width, u32 height) {
 	unsigned char *img;
-	unsigned int imgWidth, imgHeight;
-	if(lodepng_decode32_file(&img, &imgWidth, &imgHeight, image)) {
-		printf("ERROR: Could not load png file.\n");
+	int imgWidth, imgHeight, imgDepth;
+
+	img = stbi_load(image, &imgWidth, &imgHeight, &imgDepth, STBI_rgb_alpha);
+
+	if(img == NULL) {
+		printf("ERROR: Could not load image file: %s.\n", stbi_failure_reason());
 		return NULL;
 	}
 
@@ -58,9 +61,19 @@ u8* load_image(const char* image, u32 width, u32 height) {
 		return NULL;
 	}
 
+	if(imgDepth != STBI_rgb_alpha) {
+		printf("ERROR: Decoded image does't match expected format (%d, wanted %d).\n",
+			imgDepth, STBI_rgb_alpha);
+		return NULL;
+	}
+
 	return img;
 }
 
+void free_image(u8* img) {
+	stbi_image_free(img);
+}
+
 u16* image_data_to_tiles(u8* img, u32 width, u32 height, PixelFormat format, u32* size) {
 	u16* converted = (u16*) malloc(width * height * sizeof(u16));
 	u32 n = 0;
@@ -89,5 +102,7 @@ u16* image_to_tiles(const char* image, u32 width, u32 height, PixelFormat format
 		return NULL;
 	}
 
-	return image_data_to_tiles(img, width, height, format, size);
+	u16* tiles = image_data_to_tiles(img, width, height, format, size);
+	free_image(img);
+	return tiles;
 }

source/cmd.cpp

@@ -2,6 +2,7 @@
 
 #include "3ds/3ds.h"
 #include "pc/wav.h"
+#include "pc/stb_vorbis.h"
 #include "types.h"
 
 #include <errno.h>
@@ -24,26 +25,59 @@ u8* convert_to_cgfx(const std::string image, u32 width, u32 height, u32* size) {
     memcpy(ret + BANNER_CGFX_HEADER_LENGTH, converted, convertedSize);
 
     *size = BANNER_CGFX_HEADER_LENGTH + convertedSize;
+    free(converted);
     return ret;
 }
 
 u8* convert_to_cwav(const std::string file, u32* size) {
-    WAV* wav = wav_read(file.c_str());
-    if(wav == NULL) {
-        return NULL;
+    u8* ret = NULL;
+    // Determine what file type we have
+    FILE* fd = fopen(file.c_str(), "rb");
+    char magic[4];
+    fread(magic, sizeof(magic), 1, fd);
+    rewind(fd); // equivalent to SEEK_SET to pos 0
+
+    if (magic[0] == 'R' && magic[1] == 'I' && magic[2] == 'F' && magic[3] == 'F') {
+      WAV* wav = wav_read(fd);
+      if(wav != NULL) {
+        CWAV cwav;
+        cwav.channels = wav->format.numChannels;
+        cwav.sampleRate = wav->format.sampleRate;
+        cwav.bitsPerSample = wav->format.bitsPerSample;
+        cwav.dataSize = wav->data.chunkSize;
+        cwav.data = wav->data.data;
+
+        ret = cwav_build(cwav, size);
+
+        wav_free(wav);
+      }
+    } else if (magic[0] == 'O' && magic[1] == 'g' && magic[2] == 'g' && magic[3] == 'S') {
+      int error;
+      stb_vorbis* vorb = stb_vorbis_open_file(fd, false, &error, NULL);
+      if(vorb != NULL) {
+        stb_vorbis_info info = stb_vorbis_get_info(vorb);
+
+        CWAV cwav;
+        cwav.channels = info.channels;
+        cwav.sampleRate = info.sample_rate;
+        cwav.bitsPerSample = 16; // stb_vorbis always outputs 16 bit samples
+        int sampleCount = stb_vorbis_stream_length_in_samples(vorb) * info.channels;
+        cwav.dataSize = sampleCount * 2;
+        cwav.data = (u8*) calloc(sampleCount, 2);
+        stb_vorbis_get_samples_short_interleaved(vorb, info.channels, (short*) cwav.data, sampleCount);
+
+        ret = cwav_build(cwav, size);
+
+        free(cwav.data);
+        stb_vorbis_close(vorb);
+      } else {
+        printf("ERROR: Vorbis open failed, error %d.\n", error);
+      }
+    } else {
+      printf("ERROR: Audio file header '%c%c%c%c' unrecognized.\n", magic[0], magic[1], magic[2], magic[3]);
     }
 
-    CWAV cwav;
-    cwav.channels = wav->format.numChannels;
-    cwav.sampleRate = wav->format.sampleRate;
-    cwav.bitsPerSample = wav->format.bitsPerSample;
-    cwav.dataSize = wav->data.chunkSize;
-    cwav.data = wav->data.data;
-
-    u8* ret = cwav_build(cwav, size);
-
-    wav_free(wav);
-
+    fclose(fd);
     return ret;
 }
 

source/pc/stb_image.c

@@ -0,0 +1,3 @@
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_ONLY_PNG
+#include "stb_image.h"

source/pc/stb_vorbis.h

@@ -0,0 +1,2 @@
+#define STB_VORBIS_HEADER_ONLY
+#include "stb_vorbis.c"

source/pc/wav.cpp

@@ -1,6 +1,5 @@
 #include "wav.h"
 
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -18,8 +17,7 @@ bool wav_find_chunk(FILE* fd, const char* magic) {
     return true;
 }
 
-WAV* wav_read(const char* file) {
-    FILE* fd = fopen(file, "r");
+WAV* wav_read(FILE* fd) {
     if(!fd) {
         printf("ERROR: Could not open WAV file: %s\n", strerror(errno));
         return NULL;
@@ -52,8 +50,6 @@ WAV* wav_read(const char* file) {
     data.data = (u8*) malloc(data.chunkSize);
     fread(data.data, 1, data.chunkSize, fd);
 
-    fclose(fd);
-
     WAV* wav = (WAV*) malloc(sizeof(WAV));
     wav->riff = riff;
     wav->format = format;

source/pc/wav.h

@@ -1,6 +1,8 @@
 #ifndef __WAV_H__
 #define __WAV_H__
 
+#include <stdio.h>
+
 #include "../types.h"
 
 typedef struct {
@@ -32,7 +34,7 @@ typedef struct {
     Data data;
 } WAV;
 
-WAV* wav_read(const char* file);
+WAV* wav_read(FILE* fd);
 void wav_free(WAV* wav);
 
 #endif