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  1. /*
  2.  * Image format
  3.  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  4.  * Copyright (c) 2004 Michael Niedermayer
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "libavutil/intreadwrite.h"
  24. #include "libavutil/avassert.h"
  25. #include "libavutil/avstring.h"
  26. #include "libavutil/log.h"
  27. #include "libavutil/opt.h"
  28. #include "libavutil/pixdesc.h"
  29. #include "avformat.h"
  30. #include "avio_internal.h"
  31. #include "internal.h"
  32.  
  33. typedef struct {
  34.     const AVClass *class;  /**< Class for private options. */
  35.     int img_number;
  36.     int is_pipe;
  37.     int split_planes;       /**< use independent file for each Y, U, V plane */
  38.     char path[1024];
  39.     int update;
  40.     int use_strftime;
  41.     const char *muxer;
  42. } VideoMuxData;
  43.  
  44. static int write_header(AVFormatContext *s)
  45. {
  46.     VideoMuxData *img = s->priv_data;
  47.     AVStream *st = s->streams[0];
  48.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codec->pix_fmt);
  49.  
  50.     av_strlcpy(img->path, s->filename, sizeof(img->path));
  51.  
  52.     /* find format */
  53.     if (s->oformat->flags & AVFMT_NOFILE)
  54.         img->is_pipe = 0;
  55.     else
  56.         img->is_pipe = 1;
  57.  
  58.     if (st->codec->codec_id == AV_CODEC_ID_GIF) {
  59.         img->muxer = "gif";
  60.     } else if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
  61.         const char *str = strrchr(img->path, '.');
  62.         /* TODO: reindent */
  63.     img->split_planes =     str
  64.                          && !av_strcasecmp(str + 1, "y")
  65.                          && s->nb_streams == 1
  66.                          && desc
  67.                          &&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
  68.                          && desc->nb_components >= 3;
  69.     }
  70.     return 0;
  71. }
  72.  
  73. static int write_packet(AVFormatContext *s, AVPacket *pkt)
  74. {
  75.     VideoMuxData *img = s->priv_data;
  76.     AVIOContext *pb[4];
  77.     char filename[1024];
  78.     AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
  79.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(codec->pix_fmt);
  80.     int i;
  81.  
  82.     if (!img->is_pipe) {
  83.         if (img->update) {
  84.             av_strlcpy(filename, img->path, sizeof(filename));
  85.         } else if (img->use_strftime) {
  86.             time_t now0;
  87.             struct tm *tm;
  88.             time(&now0);
  89.             tm = localtime(&now0);
  90.             if (!strftime(filename, sizeof(filename), img->path, tm)) {
  91.                 av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
  92.                 return AVERROR(EINVAL);
  93.             }
  94.         } else if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 &&
  95.                    img->img_number > 1) {
  96.             av_log(s, AV_LOG_ERROR,
  97.                    "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
  98.                    img->img_number, img->path);
  99.             return AVERROR(EINVAL);
  100.         }
  101.         for (i = 0; i < 4; i++) {
  102.             if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
  103.                            &s->interrupt_callback, NULL) < 0) {
  104.                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", filename);
  105.                 return AVERROR(EIO);
  106.             }
  107.  
  108.             if (!img->split_planes || i+1 >= desc->nb_components)
  109.                 break;
  110.             filename[strlen(filename) - 1] = ((int[]){'U','V','A','x'})[i];
  111.         }
  112.     } else {
  113.         pb[0] = s->pb;
  114.     }
  115.  
  116.     if (img->split_planes) {
  117.         int ysize = codec->width * codec->height;
  118.         int usize = FF_CEIL_RSHIFT(codec->width, desc->log2_chroma_w) * FF_CEIL_RSHIFT(codec->height, desc->log2_chroma_h);
  119.         if (desc->comp[0].depth_minus1 >= 8) {
  120.             ysize *= 2;
  121.             usize *= 2;
  122.         }
  123.         avio_write(pb[0], pkt->data                , ysize);
  124.         avio_write(pb[1], pkt->data + ysize        , usize);
  125.         avio_write(pb[2], pkt->data + ysize + usize, usize);
  126.         avio_close(pb[1]);
  127.         avio_close(pb[2]);
  128.         if (desc->nb_components > 3) {
  129.             avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
  130.             avio_close(pb[3]);
  131.         }
  132.     } else if (img->muxer) {
  133.         int ret;
  134.         AVStream *st;
  135.         AVPacket pkt2 = {0};
  136.         AVFormatContext *fmt = NULL;
  137.  
  138.         av_assert0(!img->split_planes);
  139.  
  140.         ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->filename);
  141.         if (ret < 0)
  142.             return ret;
  143.         st = avformat_new_stream(fmt, NULL);
  144.         if (!st) {
  145.             avformat_free_context(fmt);
  146.             return AVERROR(ENOMEM);
  147.         }
  148.         st->id = pkt->stream_index;
  149.  
  150.         fmt->pb = pb[0];
  151.         if ((ret = av_copy_packet(&pkt2, pkt))                            < 0 ||
  152.             (ret = av_dup_packet(&pkt2))                                  < 0 ||
  153.             (ret = avcodec_copy_context(st->codec, s->streams[0]->codec)) < 0 ||
  154.             (ret = avformat_write_header(fmt, NULL))                      < 0 ||
  155.             (ret = av_interleaved_write_frame(fmt, &pkt2))                < 0 ||
  156.             (ret = av_write_trailer(fmt))                                 < 0) {
  157.             av_free_packet(&pkt2);
  158.             avformat_free_context(fmt);
  159.             return ret;
  160.         }
  161.         av_free_packet(&pkt2);
  162.         avformat_free_context(fmt);
  163.     } else {
  164.         avio_write(pb[0], pkt->data, pkt->size);
  165.     }
  166.     avio_flush(pb[0]);
  167.     if (!img->is_pipe) {
  168.         avio_close(pb[0]);
  169.     }
  170.  
  171.     img->img_number++;
  172.     return 0;
  173. }
  174.  
  175. #define OFFSET(x) offsetof(VideoMuxData, x)
  176. #define ENC AV_OPT_FLAG_ENCODING_PARAM
  177. static const AVOption muxoptions[] = {
  178.     { "updatefirst",  "continuously overwrite one file", OFFSET(update),  AV_OPT_TYPE_INT, { .i64 = 0 }, 0,       1, ENC },
  179.     { "update",       "continuously overwrite one file", OFFSET(update),  AV_OPT_TYPE_INT, { .i64 = 0 }, 0,       1, ENC },
  180.     { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT,  { .i64 = 1 }, 0, INT_MAX, ENC },
  181.     { "strftime",     "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
  182.     { NULL },
  183. };
  184.  
  185. #if CONFIG_IMAGE2_MUXER
  186. static const AVClass img2mux_class = {
  187.     .class_name = "image2 muxer",
  188.     .item_name  = av_default_item_name,
  189.     .option     = muxoptions,
  190.     .version    = LIBAVUTIL_VERSION_INT,
  191. };
  192.  
  193. AVOutputFormat ff_image2_muxer = {
  194.     .name           = "image2",
  195.     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
  196.     .extensions     = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
  197.                       "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
  198.                       "sunras,xbm,xface",
  199.     .priv_data_size = sizeof(VideoMuxData),
  200.     .video_codec    = AV_CODEC_ID_MJPEG,
  201.     .write_header   = write_header,
  202.     .write_packet   = write_packet,
  203.     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
  204.     .priv_class     = &img2mux_class,
  205. };
  206. #endif
  207. #if CONFIG_IMAGE2PIPE_MUXER
  208. AVOutputFormat ff_image2pipe_muxer = {
  209.     .name           = "image2pipe",
  210.     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
  211.     .priv_data_size = sizeof(VideoMuxData),
  212.     .video_codec    = AV_CODEC_ID_MJPEG,
  213.     .write_header   = write_header,
  214.     .write_packet   = write_packet,
  215.     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
  216. };
  217. #endif
  218.