avformat: Add single jpeg muxer

Needed to fix Ticket4218

Based on patch by: Otávio Ribeiro
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/Makefile

@@ -400,6 +400,7 @@ OBJS-$(CONFIG_SEGAFILM_DEMUXER)          += segafilm.o
 OBJS-$(CONFIG_SEGMENT_MUXER)             += segment.o
 OBJS-$(CONFIG_SHORTEN_DEMUXER)           += rawdec.o
 OBJS-$(CONFIG_SIFF_DEMUXER)              += siff.o
+OBJS-$(CONFIG_SINGLEJPEG_MUXER)          += rawenc.o
 OBJS-$(CONFIG_SMACKER_DEMUXER)           += smacker.o
 OBJS-$(CONFIG_SMJPEG_DEMUXER)            += smjpegdec.o smjpeg.o
 OBJS-$(CONFIG_SMJPEG_MUXER)              += smjpegenc.o smjpeg.o

libavformat/allformats.c

@@ -273,6 +273,7 @@ void av_register_all(void)
     REGISTER_MUXER   (SEGMENT,          stream_segment);
     REGISTER_DEMUXER (SHORTEN,          shorten);
     REGISTER_DEMUXER (SIFF,             siff);
+    REGISTER_MUXER   (SINGLEJPEG,       singlejpeg);
     REGISTER_DEMUXER (SLN,              sln);
     REGISTER_DEMUXER (SMACKER,          smacker);
     REGISTER_MUXDEMUX(SMJPEG,           smjpeg);

libavformat/rawenc.c

@@ -250,6 +250,17 @@ AVOutputFormat ff_mjpeg_muxer = {
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
+
+AVOutputFormat ff_singlejpeg_muxer = {
+    .name              = "singlejpeg",
+    .long_name         = NULL_IF_CONFIG_SMALL("JPEG single image"),
+    .mime_type         = "image/jpeg",
+    .audio_codec       = AV_CODEC_ID_NONE,
+    .video_codec       = AV_CODEC_ID_MJPEG,
+    .write_packet      = ff_raw_write_packet,
+    .flags             = AVFMT_NOTIMESTAMPS,
+    .write_header      = force_one_stream,
+};
 #endif
 
 #if CONFIG_MLP_MUXER