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>

1 files changed, 151 insertions, 0 deletions

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