added jpeg image encoder and decoder (new YUV handling routines and mjpeg codec fixes are necessary to go further)

Originally committed as revision 1534 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-02-02 19:18:09 +00:00
parent 12b64a2252
commit 0250738f13
5 changed files with 285 additions and 236 deletions
--- a/libavformat/mpjpeg.c
+++ b/libavformat/mpjpeg.c
@@ -0,0 +1,108 @@
+/*
+ * Multipart JPEG format
+ * Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avformat.h"
+
+/* Multipart JPEG */
+
+#define BOUNDARY_TAG "ffserver"
+
+static int mpjpeg_write_header(AVFormatContext *s)
+{
+    UINT8 buf1[256];
+
+    snprintf(buf1, sizeof(buf1), "--%s\n", BOUNDARY_TAG);
+    put_buffer(&s->pb, buf1, strlen(buf1));
+    put_flush_packet(&s->pb);
+    return 0;
+}
+
+static int mpjpeg_write_packet(AVFormatContext *s, int stream_index, 
+                               UINT8 *buf, int size, int force_pts)
+{
+    UINT8 buf1[256];
+
+    snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\n\n");
+    put_buffer(&s->pb, buf1, strlen(buf1));
+    put_buffer(&s->pb, buf, size);
+
+    snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG);
+    put_buffer(&s->pb, buf1, strlen(buf1));
+    put_flush_packet(&s->pb);
+    return 0;
+}
+
+static int mpjpeg_write_trailer(AVFormatContext *s)
+{
+    return 0;
+}
+
+static AVOutputFormat mpjpeg_format = {
+    "mpjpeg",
+    "Mime multipart JPEG format",
+    "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
+    "mjpg",
+    0,
+    CODEC_ID_NONE,
+    CODEC_ID_MJPEG,
+    mpjpeg_write_header,
+    mpjpeg_write_packet,
+    mpjpeg_write_trailer,
+};
+
+
+/*************************************/
+/* single frame JPEG */
+
+static int single_jpeg_write_header(AVFormatContext *s)
+{
+    return 0;
+}
+
+static int single_jpeg_write_packet(AVFormatContext *s, int stream_index,
+                            UINT8 *buf, int size, int force_pts)
+{
+    put_buffer(&s->pb, buf, size);
+    put_flush_packet(&s->pb);
+    return 1; /* no more data can be sent */
+}
+
+static int single_jpeg_write_trailer(AVFormatContext *s)
+{
+    return 0;
+}
+
+static AVOutputFormat single_jpeg_format = {
+    "singlejpeg",
+    "single JPEG image",
+    "image/jpeg",
+    NULL, /* note: no extension to favorize jpeg multiple images match */
+    0,
+    CODEC_ID_NONE,
+    CODEC_ID_MJPEG,
+    single_jpeg_write_header,
+    single_jpeg_write_packet,
+    single_jpeg_write_trailer,
+};
+
+int jpeg_init(void)
+{
+    av_register_output_format(&mpjpeg_format);
+    av_register_output_format(&single_jpeg_format);
+    return 0;
+}