img2: split muxer and demuxer into separate files

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

4 files changed, 477 insertions, 428 deletions

diff --git a/libavformat/Makefile b/libavformat/Makefile
index aa3cf7c1d8..5c0e34242e 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -106,10 +106,10 @@ OBJS-$(CONFIG_H264_MUXER)                += rawenc.o
 OBJS-$(CONFIG_HLS_DEMUXER)               += hls.o
 OBJS-$(CONFIG_IDCIN_DEMUXER)             += idcin.o
 OBJS-$(CONFIG_IFF_DEMUXER)               += iff.o
-OBJS-$(CONFIG_IMAGE2_DEMUXER)            += img2.o
-OBJS-$(CONFIG_IMAGE2_MUXER)              += img2.o
-OBJS-$(CONFIG_IMAGE2PIPE_DEMUXER)        += img2.o
-OBJS-$(CONFIG_IMAGE2PIPE_MUXER)          += img2.o
+OBJS-$(CONFIG_IMAGE2_DEMUXER)            += img2dec.o img2.o
+OBJS-$(CONFIG_IMAGE2_MUXER)              += img2enc.o img2.o
+OBJS-$(CONFIG_IMAGE2PIPE_DEMUXER)        += img2dec.o img2.o
+OBJS-$(CONFIG_IMAGE2PIPE_MUXER)          += img2enc.o img2.o
 OBJS-$(CONFIG_INGENIENT_DEMUXER)         += ingenientdec.o rawdec.o
 OBJS-$(CONFIG_IPMOVIE_DEMUXER)           += ipmovie.o
 OBJS-$(CONFIG_ISS_DEMUXER)               += iss.o
diff --git a/libavformat/img2.c b/libavformat/img2.c
index 4c43e4406e..6915e433f6 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -20,31 +20,10 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intreadwrite.h"
 #include "libavutil/avstring.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "libavutil/pixdesc.h"
-#include "libavutil/parseutils.h"
-#include "avformat.h"
-#include "avio_internal.h"
 #include "internal.h"
 
 typedef struct {
-    const AVClass *class;  /**< Class for private options. */
-    int img_first;
-    int img_last;
-    int img_number;
-    int img_count;
-    int is_pipe;
-    char path[1024];
-    char *pixel_format;     /**< Set by a private option. */
-    char *video_size;       /**< Set by a private option. */
-    char *framerate;        /**< Set by a private option. */
-    int loop;
-} VideoData;
-
-typedef struct {
     enum CodecID id;
     const char *str;
 } IdStrMap;
@@ -89,31 +68,6 @@ static const IdStrMap img_tags[] = {
     { CODEC_ID_NONE      , NULL}
 };
 
-static const int sizes[][2] = {
-    { 640, 480 },
-    { 720, 480 },
-    { 720, 576 },
-    { 352, 288 },
-    { 352, 240 },
-    { 160, 128 },
-    { 512, 384 },
-    { 640, 352 },
-    { 640, 240 },
-};
-
-static int infer_size(int *width_ptr, int *height_ptr, int size)
-{
-    int i;
-
-    for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
-        if ((sizes[i][0] * sizes[i][1]) == size) {
-            *width_ptr = sizes[i][0];
-            *height_ptr = sizes[i][1];
-            return 0;
-        }
-    }
-    return -1;
-}
 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
 {
     str= strrchr(str, '.');
@@ -133,381 +87,3 @@ enum CodecID ff_guess_image2_codec(const char *filename)
 {
     return av_str2id(img_tags, filename);
 }
-
-/* return -1 if no image found */
-static int find_image_range(int *pfirst_index, int *plast_index,
-                            const char *path)
-{
-    char buf[1024];
-    int range, last_index, range1, first_index;
-
-    /* find the first image */
-    for(first_index = 0; first_index < 5; first_index++) {
-        if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
-            *pfirst_index =
-            *plast_index = 1;
-            if (avio_check(buf, AVIO_FLAG_READ) > 0)
-                return 0;
-            return -1;
-        }
-        if (avio_check(buf, AVIO_FLAG_READ) > 0)
-            break;
-    }
-    if (first_index == 5)
-        goto fail;
-
-    /* find the last image */
-    last_index = first_index;
-    for(;;) {
-        range = 0;
-        for(;;) {
-            if (!range)
-                range1 = 1;
-            else
-                range1 = 2 * range;
-            if (av_get_frame_filename(buf, sizeof(buf), path,
-                                      last_index + range1) < 0)
-                goto fail;
-            if (avio_check(buf, AVIO_FLAG_READ) <= 0)
-                break;
-            range = range1;
-            /* just in case... */
-            if (range >= (1 << 30))
-                goto fail;
-        }
-        /* we are sure than image last_index + range exists */
-        if (!range)
-            break;
-        last_index += range;
-    }
-    *pfirst_index = first_index;
-    *plast_index = last_index;
-    return 0;
- fail:
-    return -1;
-}
-
-
-static int read_probe(AVProbeData *p)
-{
-    if (p->filename && ff_guess_image2_codec(p->filename)) {
-        if (av_filename_number_test(p->filename))
-            return AVPROBE_SCORE_MAX;
-        else
-            return AVPROBE_SCORE_MAX/2;
-    }
-    return 0;
-}
-
-static int read_header(AVFormatContext *s1)
-{
-    VideoData *s = s1->priv_data;
-    int first_index, last_index, ret = 0;
-    int width = 0, height = 0;
-    AVStream *st;
-    enum PixelFormat pix_fmt = PIX_FMT_NONE;
-    AVRational framerate;
-
-    s1->ctx_flags |= AVFMTCTX_NOHEADER;
-
-    st = avformat_new_stream(s1, NULL);
-    if (!st) {
-        return AVERROR(ENOMEM);
-    }
-
-    if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
-        av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
-        return AVERROR(EINVAL);
-    }
-    if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
-        av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
-        return ret;
-    }
-    if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
-        av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
-        return ret;
-    }
-
-    av_strlcpy(s->path, s1->filename, sizeof(s->path));
-    s->img_number = 0;
-    s->img_count = 0;
-
-    /* find format */
-    if (s1->iformat->flags & AVFMT_NOFILE)
-        s->is_pipe = 0;
-    else{
-        s->is_pipe = 1;
-        st->need_parsing = AVSTREAM_PARSE_FULL;
-    }
-
-    avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
-
-    if (width && height) {
-        st->codec->width  = width;
-        st->codec->height = height;
-    }
-
-    if (!s->is_pipe) {
-        if (find_image_range(&first_index, &last_index, s->path) < 0)
-            return AVERROR(ENOENT);
-        s->img_first = first_index;
-        s->img_last = last_index;
-        s->img_number = first_index;
-        /* compute duration */
-        st->start_time = 0;
-        st->duration = last_index - first_index + 1;
-    }
-
-    if(s1->video_codec_id){
-        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
-        st->codec->codec_id = s1->video_codec_id;
-    }else if(s1->audio_codec_id){
-        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
-        st->codec->codec_id = s1->audio_codec_id;
-    }else{
-        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
-        st->codec->codec_id   = ff_guess_image2_codec(s->path);
-    }
-    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)
-        st->codec->pix_fmt = pix_fmt;
-
-    return 0;
-}
-
-static int read_packet(AVFormatContext *s1, AVPacket *pkt)
-{
-    VideoData *s = s1->priv_data;
-    char filename[1024];
-    int i;
-    int size[3]={0}, ret[3]={0};
-    AVIOContext *f[3];
-    AVCodecContext *codec= s1->streams[0]->codec;
-
-    if (!s->is_pipe) {
-        /* loop over input */
-        if (s->loop && s->img_number > s->img_last) {
-            s->img_number = s->img_first;
-        }
-        if (s->img_number > s->img_last)
-            return AVERROR_EOF;
-        if (av_get_frame_filename(filename, sizeof(filename),
-                                  s->path, s->img_number)<0 && s->img_number > 1)
-            return AVERROR(EIO);
-        for(i=0; i<3; i++){
-            if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
-                           &s1->interrupt_callback, NULL) < 0) {
-                if(i==1)
-                    break;
-                av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
-                return AVERROR(EIO);
-            }
-            size[i]= avio_size(f[i]);
-
-            if(codec->codec_id != CODEC_ID_RAWVIDEO)
-                break;
-            filename[ strlen(filename) - 1 ]= 'U' + i;
-        }
-
-        if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
-            infer_size(&codec->width, &codec->height, size[0]);
-    } else {
-        f[0] = s1->pb;
-        if (f[0]->eof_reached)
-            return AVERROR(EIO);
-        size[0]= 4096;
-    }
-
-    av_new_packet(pkt, size[0] + size[1] + size[2]);
-    pkt->stream_index = 0;
-    pkt->flags |= AV_PKT_FLAG_KEY;
-
-    pkt->size= 0;
-    for(i=0; i<3; i++){
-        if(size[i]){
-            ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
-            if (!s->is_pipe)
-                avio_close(f[i]);
-            if(ret[i]>0)
-                pkt->size += ret[i];
-        }
-    }
-
-    if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
-        av_free_packet(pkt);
-        return AVERROR(EIO); /* signal EOF */
-    } else {
-        s->img_count++;
-        s->img_number++;
-        return 0;
-    }
-}
-
-#if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
-/******************************************************/
-/* image output */
-
-static int write_header(AVFormatContext *s)
-{
-    VideoData *img = s->priv_data;
-
-    img->img_number = 1;
-    av_strlcpy(img->path, s->filename, sizeof(img->path));
-
-    /* find format */
-    if (s->oformat->flags & AVFMT_NOFILE)
-        img->is_pipe = 0;
-    else
-        img->is_pipe = 1;
-
-    return 0;
-}
-
-static int write_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    VideoData *img = s->priv_data;
-    AVIOContext *pb[3];
-    char filename[1024];
-    AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
-    int i;
-
-    if (!img->is_pipe) {
-        if (av_get_frame_filename(filename, sizeof(filename),
-                                  img->path, img->img_number) < 0 && img->img_number>1) {
-            av_log(s, AV_LOG_ERROR,
-                   "Could not get frame filename number %d from pattern '%s'\n",
-                   img->img_number, img->path);
-            return AVERROR(EIO);
-        }
-        for(i=0; i<3; i++){
-            if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
-                           &s->interrupt_callback, NULL) < 0) {
-                av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
-                return AVERROR(EIO);
-            }
-
-            if(codec->codec_id != CODEC_ID_RAWVIDEO)
-                break;
-            filename[ strlen(filename) - 1 ]= 'U' + i;
-        }
-    } else {
-        pb[0] = s->pb;
-    }
-
-    if(codec->codec_id == CODEC_ID_RAWVIDEO){
-        int ysize = codec->width * codec->height;
-        avio_write(pb[0], pkt->data        , ysize);
-        avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
-        avio_write(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
-        avio_flush(pb[1]);
-        avio_flush(pb[2]);
-        avio_close(pb[1]);
-        avio_close(pb[2]);
-    }else{
-        if (ff_guess_image2_codec(s->filename) == CODEC_ID_JPEG2000) {
-            AVStream *st = s->streams[0];
-            if(st->codec->extradata_size > 8 &&
-               AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
-                if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
-                    goto error;
-                avio_wb32(pb[0], 12);
-                ffio_wfourcc(pb[0], "jP  ");
-                avio_wb32(pb[0], 0x0D0A870A); // signature
-                avio_wb32(pb[0], 20);
-                ffio_wfourcc(pb[0], "ftyp");
-                ffio_wfourcc(pb[0], "jp2 ");
-                avio_wb32(pb[0], 0);
-                ffio_wfourcc(pb[0], "jp2 ");
-                avio_write(pb[0], st->codec->extradata, st->codec->extradata_size);
-            }else if(pkt->size < 8 ||
-                     (!st->codec->extradata_size &&
-                      AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
-            error:
-                av_log(s, AV_LOG_ERROR, "malformed JPEG 2000 codestream\n");
-                return -1;
-            }
-        }
-        avio_write(pb[0], pkt->data, pkt->size);
-    }
-    avio_flush(pb[0]);
-    if (!img->is_pipe) {
-        avio_close(pb[0]);
-    }
-
-    img->img_number++;
-    return 0;
-}
-
-#endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
-
-#define OFFSET(x) offsetof(VideoData, x)
-#define DEC AV_OPT_FLAG_DECODING_PARAM
-static const AVOption options[] = {
-    { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
-    { "video_size",   "", OFFSET(video_size),   AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
-    { "framerate",    "", OFFSET(framerate),    AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
-    { "loop",         "", OFFSET(loop),         AV_OPT_TYPE_INT,    {.dbl = 0},    0, 1, DEC },
-    { NULL },
-};
-
-/* input */
-#if CONFIG_IMAGE2_DEMUXER
-static const AVClass img2_class = {
-    .class_name = "image2 demuxer",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-AVInputFormat ff_image2_demuxer = {
-    .name           = "image2",
-    .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
-    .priv_data_size = sizeof(VideoData),
-    .read_probe     = read_probe,
-    .read_header    = read_header,
-    .read_packet    = read_packet,
-    .flags          = AVFMT_NOFILE,
-    .priv_class     = &img2_class,
-};
-#endif
-#if CONFIG_IMAGE2PIPE_DEMUXER
-static const AVClass img2pipe_class = {
-    .class_name = "image2pipe demuxer",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-AVInputFormat ff_image2pipe_demuxer = {
-    .name           = "image2pipe",
-    .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
-    .priv_data_size = sizeof(VideoData),
-    .read_header    = read_header,
-    .read_packet    = read_packet,
-    .priv_class     = &img2pipe_class,
-};
-#endif
-
-/* output */
-#if CONFIG_IMAGE2_MUXER
-AVOutputFormat ff_image2_muxer = {
-    .name           = "image2",
-    .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
-    .extensions     = "bmp,dpx,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
-                      "ppm,sgi,tga,tif,tiff,jp2,xwd,sun,ras,rs,im1,im8,im24,"
-                      "sunras",
-    .priv_data_size = sizeof(VideoData),
-    .video_codec    = CODEC_ID_MJPEG,
-    .write_header   = write_header,
-    .write_packet   = write_packet,
-    .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE
-};
-#endif
-#if CONFIG_IMAGE2PIPE_MUXER
-AVOutputFormat ff_image2pipe_muxer = {
-    .name           = "image2pipe",
-    .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
-    .priv_data_size = sizeof(VideoData),
-    .video_codec    = CODEC_ID_MJPEG,
-    .write_header   = write_header,
-    .write_packet   = write_packet,
-    .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
-};
-#endif
diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
new file mode 100644
index 0000000000..b4b9723bcd
--- /dev/null
+++ b/libavformat/img2dec.c
@@ -0,0 +1,322 @@
+/*
+ * Image format
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2004 Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avstring.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/parseutils.h"
+#include "avformat.h"
+#include "internal.h"
+
+typedef struct {
+    const AVClass *class;  /**< Class for private options. */
+    int img_first;
+    int img_last;
+    int img_number;
+    int img_count;
+    int is_pipe;
+    char path[1024];
+    char *pixel_format;     /**< Set by a private option. */
+    char *video_size;       /**< Set by a private option. */
+    char *framerate;        /**< Set by a private option. */
+    int loop;
+} VideoDemuxData;
+
+static const int sizes[][2] = {
+    { 640, 480 },
+    { 720, 480 },
+    { 720, 576 },
+    { 352, 288 },
+    { 352, 240 },
+    { 160, 128 },
+    { 512, 384 },
+    { 640, 352 },
+    { 640, 240 },
+};
+
+static int infer_size(int *width_ptr, int *height_ptr, int size)
+{
+    int i;
+
+    for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
+        if ((sizes[i][0] * sizes[i][1]) == size) {
+            *width_ptr = sizes[i][0];
+            *height_ptr = sizes[i][1];
+            return 0;
+        }
+    }
+    return -1;
+}
+
+/* return -1 if no image found */
+static int find_image_range(int *pfirst_index, int *plast_index,
+                            const char *path)
+{
+    char buf[1024];
+    int range, last_index, range1, first_index;
+
+    /* find the first image */
+    for(first_index = 0; first_index < 5; first_index++) {
+        if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
+            *pfirst_index =
+            *plast_index = 1;
+            if (avio_check(buf, AVIO_FLAG_READ) > 0)
+                return 0;
+            return -1;
+        }
+        if (avio_check(buf, AVIO_FLAG_READ) > 0)
+            break;
+    }
+    if (first_index == 5)
+        goto fail;
+
+    /* find the last image */
+    last_index = first_index;
+    for(;;) {
+        range = 0;
+        for(;;) {
+            if (!range)
+                range1 = 1;
+            else
+                range1 = 2 * range;
+            if (av_get_frame_filename(buf, sizeof(buf), path,
+                                      last_index + range1) < 0)
+                goto fail;
+            if (avio_check(buf, AVIO_FLAG_READ) <= 0)
+                break;
+            range = range1;
+            /* just in case... */
+            if (range >= (1 << 30))
+                goto fail;
+        }
+        /* we are sure than image last_index + range exists */
+        if (!range)
+            break;
+        last_index += range;
+    }
+    *pfirst_index = first_index;
+    *plast_index = last_index;
+    return 0;
+ fail:
+    return -1;
+}
+
+
+static int read_probe(AVProbeData *p)
+{
+    if (p->filename && ff_guess_image2_codec(p->filename)) {
+        if (av_filename_number_test(p->filename))
+            return AVPROBE_SCORE_MAX;
+        else
+            return AVPROBE_SCORE_MAX/2;
+    }
+    return 0;
+}
+
+static int read_header(AVFormatContext *s1)
+{
+    VideoDemuxData *s = s1->priv_data;
+    int first_index, last_index, ret = 0;
+    int width = 0, height = 0;
+    AVStream *st;
+    enum PixelFormat pix_fmt = PIX_FMT_NONE;
+    AVRational framerate;
+
+    s1->ctx_flags |= AVFMTCTX_NOHEADER;
+
+    st = avformat_new_stream(s1, NULL);
+    if (!st) {
+        return AVERROR(ENOMEM);
+    }
+
+    if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
+        av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
+        return AVERROR(EINVAL);
+    }
+    if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
+        av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
+        return ret;
+    }
+    if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
+        av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
+        return ret;
+    }
+
+    av_strlcpy(s->path, s1->filename, sizeof(s->path));
+    s->img_number = 0;
+    s->img_count = 0;
+
+    /* find format */
+    if (s1->iformat->flags & AVFMT_NOFILE)
+        s->is_pipe = 0;
+    else{
+        s->is_pipe = 1;
+        st->need_parsing = AVSTREAM_PARSE_FULL;
+    }
+
+    avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
+
+    if (width && height) {
+        st->codec->width  = width;
+        st->codec->height = height;
+    }
+
+    if (!s->is_pipe) {
+        if (find_image_range(&first_index, &last_index, s->path) < 0)
+            return AVERROR(ENOENT);
+        s->img_first = first_index;
+        s->img_last = last_index;
+        s->img_number = first_index;
+        /* compute duration */
+        st->start_time = 0;
+        st->duration = last_index - first_index + 1;
+    }
+
+    if(s1->video_codec_id){
+        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+        st->codec->codec_id = s1->video_codec_id;
+    }else if(s1->audio_codec_id){
+        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+        st->codec->codec_id = s1->audio_codec_id;
+    }else{
+        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+        st->codec->codec_id = ff_guess_image2_codec(s->path);
+    }
+    if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)
+        st->codec->pix_fmt = pix_fmt;
+
+    return 0;
+}
+
+static int read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    VideoDemuxData *s = s1->priv_data;
+    char filename[1024];
+    int i;
+    int size[3]={0}, ret[3]={0};
+    AVIOContext *f[3];
+    AVCodecContext *codec= s1->streams[0]->codec;
+
+    if (!s->is_pipe) {
+        /* loop over input */
+        if (s->loop && s->img_number > s->img_last) {
+            s->img_number = s->img_first;
+        }
+        if (s->img_number > s->img_last)
+            return AVERROR_EOF;
+        if (av_get_frame_filename(filename, sizeof(filename),
+                                  s->path, s->img_number)<0 && s->img_number > 1)
+            return AVERROR(EIO);
+        for(i=0; i<3; i++){
+            if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
+                           &s1->interrupt_callback, NULL) < 0) {
+                if(i==1)
+                    break;
+                av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
+                return AVERROR(EIO);
+            }
+            size[i]= avio_size(f[i]);
+
+            if(codec->codec_id != CODEC_ID_RAWVIDEO)
+                break;
+            filename[ strlen(filename) - 1 ]= 'U' + i;
+        }
+
+        if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
+            infer_size(&codec->width, &codec->height, size[0]);
+    } else {
+        f[0] = s1->pb;
+        if (f[0]->eof_reached)
+            return AVERROR(EIO);
+        size[0]= 4096;
+    }
+
+    av_new_packet(pkt, size[0] + size[1] + size[2]);
+    pkt->stream_index = 0;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+
+    pkt->size= 0;
+    for(i=0; i<3; i++){
+        if(size[i]){
+            ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
+            if (!s->is_pipe)
+                avio_close(f[i]);
+            if(ret[i]>0)
+                pkt->size += ret[i];
+        }
+    }
+
+    if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
+        av_free_packet(pkt);
+        return AVERROR(EIO); /* signal EOF */
+    } else {
+        s->img_count++;
+        s->img_number++;
+        return 0;
+    }
+}
+
+#define OFFSET(x) offsetof(VideoDemuxData, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+    { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+    { "video_size",   "", OFFSET(video_size),   AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+    { "framerate",    "", OFFSET(framerate),    AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
+    { "loop",         "", OFFSET(loop),         AV_OPT_TYPE_INT,    {.dbl = 0},    0, 1, DEC },
+    { NULL },
+};
+
+#if CONFIG_IMAGE2_DEMUXER
+static const AVClass img2_class = {
+    .class_name = "image2 demuxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+AVInputFormat ff_image2_demuxer = {
+    .name           = "image2",
+    .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
+    .priv_data_size = sizeof(VideoDemuxData),
+    .read_probe     = read_probe,
+    .read_header    = read_header,
+    .read_packet    = read_packet,
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &img2_class,
+};
+#endif
+#if CONFIG_IMAGE2PIPE_DEMUXER
+static const AVClass img2pipe_class = {
+    .class_name = "image2pipe demuxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+AVInputFormat ff_image2pipe_demuxer = {
+    .name           = "image2pipe",
+    .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
+    .priv_data_size = sizeof(VideoDemuxData),
+    .read_header    = read_header,
+    .read_packet    = read_packet,
+    .priv_class     = &img2pipe_class,
+};
+#endif
diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c
new file mode 100644
index 0000000000..8fbe37e33e
--- /dev/null
+++ b/libavformat/img2enc.c
@@ -0,0 +1,151 @@
+/*
+ * Image format
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2004 Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/avstring.h"
+#include "libavutil/log.h"
+#include "avformat.h"
+#include "avio_internal.h"
+#include "internal.h"
+
+typedef struct {
+    int img_number;
+    int is_pipe;
+    char path[1024];
+} VideoMuxData;
+
+static int write_header(AVFormatContext *s)
+{
+    VideoMuxData *img = s->priv_data;
+
+    img->img_number = 1;
+    av_strlcpy(img->path, s->filename, sizeof(img->path));
+
+    /* find format */
+    if (s->oformat->flags & AVFMT_NOFILE)
+        img->is_pipe = 0;
+    else
+        img->is_pipe = 1;
+
+    return 0;
+}
+
+static int write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    VideoMuxData *img = s->priv_data;
+    AVIOContext *pb[3];
+    char filename[1024];
+    AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
+    int i;
+
+    if (!img->is_pipe) {
+        if (av_get_frame_filename(filename, sizeof(filename),
+                                  img->path, img->img_number) < 0 && img->img_number>1) {
+            av_log(s, AV_LOG_ERROR,
+                   "Could not get frame filename number %d from pattern '%s'\n",
+                   img->img_number, img->path);
+            return AVERROR(EIO);
+        }
+        for(i=0; i<3; i++){
+            if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
+                           &s->interrupt_callback, NULL) < 0) {
+                av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
+                return AVERROR(EIO);
+            }
+
+            if(codec->codec_id != CODEC_ID_RAWVIDEO)
+                break;
+            filename[ strlen(filename) - 1 ]= 'U' + i;
+        }
+    } else {
+        pb[0] = s->pb;
+    }
+
+    if(codec->codec_id == CODEC_ID_RAWVIDEO){
+        int ysize = codec->width * codec->height;
+        avio_write(pb[0], pkt->data        , ysize);
+        avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
+        avio_write(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
+        avio_flush(pb[1]);
+        avio_flush(pb[2]);
+        avio_close(pb[1]);
+        avio_close(pb[2]);
+    }else{
+        if(ff_guess_image2_codec(s->filename) == CODEC_ID_JPEG2000){
+            AVStream *st = s->streams[0];
+            if(st->codec->extradata_size > 8 &&
+               AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
+                if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
+                    goto error;
+                avio_wb32(pb[0], 12);
+                ffio_wfourcc(pb[0], "jP  ");
+                avio_wb32(pb[0], 0x0D0A870A); // signature
+                avio_wb32(pb[0], 20);
+                ffio_wfourcc(pb[0], "ftyp");
+                ffio_wfourcc(pb[0], "jp2 ");
+                avio_wb32(pb[0], 0);
+                ffio_wfourcc(pb[0], "jp2 ");
+                avio_write(pb[0], st->codec->extradata, st->codec->extradata_size);
+            }else if(pkt->size < 8 ||
+                     (!st->codec->extradata_size &&
+                      AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
+            error:
+                av_log(s, AV_LOG_ERROR, "malformed JPEG 2000 codestream\n");
+                return -1;
+            }
+        }
+        avio_write(pb[0], pkt->data, pkt->size);
+    }
+    avio_flush(pb[0]);
+    if (!img->is_pipe) {
+        avio_close(pb[0]);
+    }
+
+    img->img_number++;
+    return 0;
+}
+
+#if CONFIG_IMAGE2_MUXER
+AVOutputFormat ff_image2_muxer = {
+    .name           = "image2",
+    .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
+    .extensions     = "bmp,dpx,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
+                      "ppm,sgi,tga,tif,tiff,jp2,xwd,sun,ras,rs,im1,im8,im24,"
+                      "sunras",
+    .priv_data_size = sizeof(VideoMuxData),
+    .video_codec    = CODEC_ID_MJPEG,
+    .write_header   = write_header,
+    .write_packet   = write_packet,
+    .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE
+};
+#endif
+#if CONFIG_IMAGE2PIPE_MUXER
+AVOutputFormat ff_image2pipe_muxer = {
+    .name           = "image2pipe",
+    .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
+    .priv_data_size = sizeof(VideoMuxData),
+    .video_codec    = CODEC_ID_MJPEG,
+    .write_header   = write_header,
+    .write_packet   = write_packet,
+    .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
+};
+#endif