added jpeg image encoder and decoder (new YUV handling routines and mjpeg...

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

libavformat/Makefile

@@ -12,7 +12,7 @@ OBJS= utils.o cutils.o allformats.o
 
 # mux and demuxes
 OBJS+=mpeg.o mpegts.o ffm.o crc.o img.o raw.o rm.o \
-      avienc.o avidec.o wav.o swf.o au.o gif.o mov.o jpeg.o dv.o \
+      avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
       yuv4mpeg.o
 
 ifeq ($(CONFIG_RISKY),yes)
@@ -20,7 +20,7 @@ OBJS+= asf.o
 endif
 
 # image formats
-OBJS+= pnm.o yuv.o png.o libpng/png.o libpng/pngread.o libpng/pngrutil.o libpng/pngwrite.o libpng/pngwutil.o
+OBJS+= pnm.o yuv.o png.o libpng/png.o libpng/pngread.o libpng/pngrutil.o libpng/pngwrite.o libpng/pngwutil.o jpeg.o gifdec.o
 # file I/O
 OBJS+= avio.o aviobuf.o file.o 
 OBJS+= framehook.o 

libavformat/allformats.c

@@ -76,6 +76,7 @@ void av_register_all(void)
     av_register_image_format(&pgmyuv_image_format);
     av_register_image_format(&yuv_image_format);
     av_register_image_format(&png_image_format);
+    av_register_image_format(&jpeg_image_format);
 
     /* file protocols */
     register_protocol(&file_protocol);

libavformat/avformat.h

@@ -236,6 +236,7 @@ extern AVImageFormat ppm_image_format;
 extern AVImageFormat pgmyuv_image_format;
 extern AVImageFormat yuv_image_format;
 extern AVImageFormat png_image_format;
+extern AVImageFormat jpeg_image_format;
 
 /* XXX: use automatic init with either ELF sections or C file parser */
 /* modules */

libavformat/mpjpeg.c

+/*
+ * 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;
+}