emote2ss

commit e12a80e2dae2f4908a5bece6133a14041e9d3a77
parent c5cfc4dafcd131df9c4bbd70bcb134a70ce43b89
Author: bsandro <email@bsandro.tech>
Date:   Sat,  8 Jul 2023 23:23:15 +0300

merge transitional -> master

Diffstat:
M
Makefile
 | 
2
+-
M
src/main.c
 | 
40
++++++++++++++++++++++++----------------

2 files changed, 25 insertions(+), 17 deletions(-)
diff --git a/Makefile b/Makefile
@@ -2,7 +2,7 @@ NAME=$(shell basename ${PWD})
 SRC=$(wildcard *.c src/*.c)
 DEPS:=$(wildcard *.h src/*.h)
 OBJ:=$(SRC:.c=.o)
-LIBS:=libwebp libwebpdecoder libwebpdemux
+LIBS:=libwebp libwebpdemux
 CFLAGS=-Og -g -std=c99 -Werror -Wall -Wextra -I. -I./src/ ${shell pkg-config --cflags $(LIBS)}
 LDFLAGS=-lc ${shell pkg-config --libs $(LIBS)}
 
diff --git a/src/main.c b/src/main.c
@@ -45,7 +45,7 @@ void alloc_image(AnimatedImage *img, uint32_t frame_count) {
 	assert(img_size == (size_t)img_size);
 	assert(frames_size == (size_t)frames_size);
 
-	printf("img mem: %lu\nframes mem: %lu\n", img_size, frames_size);
+	printf("img mem: %" PRIu64 "\nframes mem: %" PRIu64 "\n", img_size, frames_size);
 
 	mem = malloc(img_size);
 	frames = malloc(frames_size);
@@ -149,30 +149,40 @@ int read_webp(const char *fname, AnimatedImage *anim) {
 	return 0;
 }
 
-void write_webp(const char *fname, AnimatedImage *img) {
+void write_webp(const char *fname, AnimatedImage *img, int cols, int rows) {
+	// validate that we have enough space in resulting picture for all the frames
+	assert(rows*cols >= (int)img->frame_count);
 	FILE *fp = fopen(fname, "wb");
 	assert(fp!=NULL);
 	uint8_t *out;
 	size_t frame_size = img->width * img->height * sizeof(uint32_t);
-	size_t frames_size = frame_size * img->frame_count;
+	size_t img_size = frame_size * img->frame_count;
 	size_t line_size = img->width * sizeof(uint32_t);
-	size_t full_line = line_size * img->frame_count;
-	uint8_t *merged = malloc(frames_size);
+	size_t full_line = line_size * cols;
+	uint8_t *merged = malloc(frame_size * rows * cols);
 	assert(merged!=NULL);
-	bzero(merged, frames_size);
-	for (int y = 0; y < img->height; ++y) {
-		for (uint32_t i = 0; i < img->frame_count; ++i) {
-			memcpy(merged+y*full_line+i*line_size, img->frames[i].rgba+line_size*y, line_size);
+	bzero(merged, img_size);
+	uint8_t *merged_orig = merged;
+	for (int row = 0; row < rows; ++row) {
+		for (int y = 0; y < img->height; ++y) {
+			for (int col = 0; col < cols; ++col) {
+				uint32_t offset = row*cols+col;
+				if (offset < img->frame_count) {
+					memcpy(merged, img->frames[offset].rgba+y*line_size, line_size);
+				}
+				merged += line_size;
+			}
 		}
 	}
-	int stride = img->width * sizeof(uint32_t) * img->frame_count;
-	size_t encoded = WebPEncodeLosslessRGBA(merged, img->width * img->frame_count, img->height, stride, &out);
-	printf("size: %lu, encoded: %lu\n", img->width*img->height*sizeof(uint32_t), encoded);
+	int stride = full_line;
+	printf("stride: %d\n", stride);
+	size_t encoded = WebPEncodeLosslessRGBA(merged_orig, img->width * cols, img->height * rows, stride, &out);
+	printf("size: %" PRIu32 ", encoded: %zu\n", img->width*img->height*sizeof(uint32_t), encoded);
 	assert(encoded!=0);
 	size_t written = fwrite(out, sizeof(uint8_t), encoded, fp);
 	assert(written==encoded);
 	WebPFree(out);
-	free(merged);
+	free(merged_orig);
 	fclose(fp);
 }
 
@@ -184,9 +194,7 @@ int main(int argc, const char **argv) {
 			AnimatedImage img = {0};
 			assert(read_webp(argv[i], &img) == 0);
 			printf("dimensions: %dx%d\nframes: %d\n", img.width, img.height, img.frame_count);
-
-			// dump 1st frame to test stuff
-			write_webp("test01.webp", &img);
+			write_webp("test01.webp", &img, 5, 4);
 		}
 	}