1 files changed, 122 insertions, 0 deletions
diff --git a/src/creator.c b/src/creator.c
new file mode 100644
index 0000000..d8bd008
--- /dev/null
+++ b/src/creator.c
@@ -0,0 +1,122 @@
+#include "creator.h"
+#include "render.h"
+
+static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt,
+                   FILE *outfile)
+{
+    int ret;
+    /* send the frame to the encoder */
+    ret = avcodec_send_frame(enc_ctx, frame);
+    if (ret < 0) {
+        fprintf(stderr, "error sending a frame for encoding\n");
+        exit(1);
+    }
+    while (ret >= 0) {
+        ret = avcodec_receive_packet(enc_ctx, pkt);
+        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
+            return;
+        else if (ret < 0) {
+            fprintf(stderr, "error during encoding\n");
+            exit(1);
+        }
+        //printf("encoded frame %3"PRId64" (size=%5d)\n", pkt->pts, pkt->size);
+        fwrite(pkt->data, 1, pkt->size, outfile);
+        av_packet_unref(pkt);
+    }
+}
+int generateVideo(filename, int width, int height, int fps, int bitRate)
+{
+    avcodec_register_all();
+
+    /* find the mpeg1video encoder */
+	codec = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO);
+	if (!codec) {
+		fprintf(stderr, "codec not found\n");
+		exit(1);
+	}
+	c = avcodec_alloc_context3(codec);
+
+	picture = av_frame_alloc();
+	pkt = av_packet_alloc();
+	if (!pkt)
+		exit(1);
+
+    /* put sample parameters */
+    c->bit_rate = bitRate;
+
+    /* resolution must be a multiple of two */
+    if ((width*height)%2)
+    	exit(1);
+    c->width = width;
+    c->height = height;
+
+    /* frames per second */
+    c->time_base = (AVRational){1, fps};
+    c->framerate = (AVRational){fps, 1};
+
+    /* emit one intra frame every ten frames */
+    c->gop_size = 10;
+    c->max_b_frames=1;
+    c->pix_fmt = AV_PIX_FMT_RGBA;
+    /* open it */
+
+    if (avcodec_open2(c, codec, NULL) < 0) {
+        fprintf(stderr, "could not open codec\n");
+        exit(1);
+    }
+    f = fopen(filename, "wb");
+    if (!f) {
+        fprintf(stderr, "could not open %s\n", filename);
+        exit(1);
+    }
+    picture->format = c->pix_fmt;
+    picture->width  = c->width;
+    picture->height = c->height;
+    ret = av_frame_get_buffer(picture, 32);
+    if (ret < 0) {
+        fprintf(stderr, "could not alloc the frame data\n");
+        exit(1);
+    }
+
+
+void addFrame(int *frame)
+{
+        fflush(stdout);
+        /* make sure the frame data is writable */
+        ret = av_frame_make_writable(picture);
+        if (ret < 0)
+            exit(1);
+
+		picture->data[0] = frame;
+
+        /* prepare a dummy image */
+        /* Y */
+        /*for(y=0;y<c->height;y++) {
+            for(x=0;x<c->width;x++) {
+                picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
+            }
+        }  YCbCr colorCode
+        /* Cb and Cr *
+        for(y=0;y<c->height/2;y++) {
+            for(x=0;x<c->width/2;x++) {
+                picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
+                picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
+            }
+        } */
+
+        picture->pts = i;
+        /* encode the image */
+        encode(c, picture, pkt, f);
+}
+
+void endFile(void){
+	uint8_t endcode[] = { 0, 0, 1, 0xb7 };
+	/* flush the encoder */
+    encode(c, NULL, pkt, f);
+    /* add sequence end code to have a real MPEG file */
+    fwrite(endcode, 1, sizeof(endcode), f);
+    fclose(f);
+    avcodec_free_context(&c);
+    av_frame_free(&picture);
+    av_packet_free(&pkt);
+}