LCOV - code coverage report
Current view: top level - libavformat - img2enc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 42 108 38.9 %
Date: 2017-12-17 04:34:43 Functions: 3 3 100.0 %

          Line data    Source code
       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 "libavutil/time_internal.h"
      30             : #include "avformat.h"
      31             : #include "avio_internal.h"
      32             : #include "internal.h"
      33             : #include "img2.h"
      34             : 
      35             : typedef struct VideoMuxData {
      36             :     const AVClass *class;  /**< Class for private options. */
      37             :     int img_number;
      38             :     int is_pipe;
      39             :     int split_planes;       /**< use independent file for each Y, U, V plane */
      40             :     char path[1024];
      41             :     char tmp[4][1024];
      42             :     char target[4][1024];
      43             :     int update;
      44             :     int use_strftime;
      45             :     int frame_pts;
      46             :     const char *muxer;
      47             :     int use_rename;
      48             : } VideoMuxData;
      49             : 
      50          36 : static int write_header(AVFormatContext *s)
      51             : {
      52          36 :     VideoMuxData *img = s->priv_data;
      53          36 :     AVStream *st = s->streams[0];
      54          36 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codecpar->format);
      55             : 
      56          36 :     av_strlcpy(img->path, s->filename, sizeof(img->path));
      57             : 
      58             :     /* find format */
      59          36 :     if (s->oformat->flags & AVFMT_NOFILE)
      60          33 :         img->is_pipe = 0;
      61             :     else
      62           3 :         img->is_pipe = 1;
      63             : 
      64          36 :     if (st->codecpar->codec_id == AV_CODEC_ID_GIF) {
      65           0 :         img->muxer = "gif";
      66          36 :     } else if (st->codecpar->codec_id == AV_CODEC_ID_FITS) {
      67           0 :         img->muxer = "fits";
      68          36 :     } else if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
      69           0 :         const char *str = strrchr(img->path, '.');
      70           0 :         img->split_planes =     str
      71           0 :                              && !av_strcasecmp(str + 1, "y")
      72           0 :                              && s->nb_streams == 1
      73           0 :                              && desc
      74           0 :                              &&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
      75           0 :                              && desc->nb_components >= 3;
      76             :     }
      77             : 
      78          36 :     return 0;
      79             : }
      80             : 
      81         504 : static int write_packet(AVFormatContext *s, AVPacket *pkt)
      82             : {
      83         504 :     VideoMuxData *img = s->priv_data;
      84             :     AVIOContext *pb[4];
      85             :     char filename[1024];
      86         504 :     AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
      87         504 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(par->format);
      88             :     int i;
      89         504 :     int nb_renames = 0;
      90             : 
      91         504 :     if (!img->is_pipe) {
      92         429 :         if (img->update) {
      93           0 :             av_strlcpy(filename, img->path, sizeof(filename));
      94         429 :         } else if (img->use_strftime) {
      95             :             time_t now0;
      96             :             struct tm *tm, tmpbuf;
      97           0 :             time(&now0);
      98           0 :             tm = localtime_r(&now0, &tmpbuf);
      99           0 :             if (!strftime(filename, sizeof(filename), img->path, tm)) {
     100           0 :                 av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
     101           0 :                 return AVERROR(EINVAL);
     102             :             }
     103         429 :         } else if (img->frame_pts) {
     104           0 :             if (av_get_frame_filename2(filename, sizeof(filename), img->path, pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
     105           0 :                 av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the frames.");
     106           0 :                 return AVERROR(EINVAL);
     107             :             }
     108         429 :         } else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
     109             :                                           img->img_number,
     110           0 :                                           AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
     111           0 :                    img->img_number > 1) {
     112           0 :             av_log(s, AV_LOG_ERROR,
     113             :                    "Could not get frame filename number %d from pattern '%s' (either set update or use a pattern like %%03d within the filename pattern)\n",
     114           0 :                    img->img_number, img->path);
     115           0 :             return AVERROR(EINVAL);
     116             :         }
     117         429 :         for (i = 0; i < 4; i++) {
     118         429 :             snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
     119         429 :             av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
     120         429 :             if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, NULL) < 0) {
     121           0 :                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
     122           0 :                 return AVERROR(EIO);
     123             :             }
     124             : 
     125         429 :             if (!img->split_planes || i+1 >= desc->nb_components)
     126             :                 break;
     127           0 :             filename[strlen(filename) - 1] = "UVAx"[i];
     128             :         }
     129         429 :         if (img->use_rename)
     130           0 :             nb_renames = i + 1;
     131             :     } else {
     132          75 :         pb[0] = s->pb;
     133             :     }
     134             : 
     135         504 :     if (img->split_planes) {
     136           0 :         int ysize = par->width * par->height;
     137           0 :         int usize = AV_CEIL_RSHIFT(par->width, desc->log2_chroma_w) * AV_CEIL_RSHIFT(par->height, desc->log2_chroma_h);
     138           0 :         if (desc->comp[0].depth >= 9) {
     139           0 :             ysize *= 2;
     140           0 :             usize *= 2;
     141             :         }
     142           0 :         avio_write(pb[0], pkt->data                , ysize);
     143           0 :         avio_write(pb[1], pkt->data + ysize        , usize);
     144           0 :         avio_write(pb[2], pkt->data + ysize + usize, usize);
     145           0 :         ff_format_io_close(s, &pb[1]);
     146           0 :         ff_format_io_close(s, &pb[2]);
     147           0 :         if (desc->nb_components > 3) {
     148           0 :             avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
     149           0 :             ff_format_io_close(s, &pb[3]);
     150             :         }
     151         504 :     } else if (img->muxer) {
     152             :         int ret;
     153             :         AVStream *st;
     154           0 :         AVPacket pkt2 = {0};
     155           0 :         AVFormatContext *fmt = NULL;
     156             : 
     157           0 :         av_assert0(!img->split_planes);
     158             : 
     159           0 :         ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->filename);
     160           0 :         if (ret < 0)
     161           0 :             return ret;
     162           0 :         st = avformat_new_stream(fmt, NULL);
     163           0 :         if (!st) {
     164           0 :             avformat_free_context(fmt);
     165           0 :             return AVERROR(ENOMEM);
     166             :         }
     167           0 :         st->id = pkt->stream_index;
     168             : 
     169           0 :         fmt->pb = pb[0];
     170           0 :         if ((ret = av_packet_ref(&pkt2, pkt))                             < 0 ||
     171           0 :             (ret = avcodec_parameters_copy(st->codecpar, s->streams[0]->codecpar)) < 0 ||
     172           0 :             (ret = avformat_write_header(fmt, NULL))                      < 0 ||
     173           0 :             (ret = av_interleaved_write_frame(fmt, &pkt2))                < 0 ||
     174           0 :             (ret = av_write_trailer(fmt))                                 < 0) {
     175           0 :             av_packet_unref(&pkt2);
     176           0 :             avformat_free_context(fmt);
     177           0 :             return ret;
     178             :         }
     179           0 :         av_packet_unref(&pkt2);
     180           0 :         avformat_free_context(fmt);
     181             :     } else {
     182         504 :         avio_write(pb[0], pkt->data, pkt->size);
     183             :     }
     184         504 :     avio_flush(pb[0]);
     185         504 :     if (!img->is_pipe) {
     186         429 :         ff_format_io_close(s, &pb[0]);
     187         429 :         for (i = 0; i < nb_renames; i++) {
     188           0 :             int ret = ff_rename(img->tmp[i], img->target[i], s);
     189           0 :             if (ret < 0)
     190           0 :                 return ret;
     191             :         }
     192             :     }
     193             : 
     194         504 :     img->img_number++;
     195         504 :     return 0;
     196             : }
     197             : 
     198          36 : static int query_codec(enum AVCodecID id, int std_compliance)
     199             : {
     200             :     int i;
     201          36 :     for (i = 0; ff_img_tags[i].id != AV_CODEC_ID_NONE; i++)
     202          36 :         if (ff_img_tags[i].id == id)
     203          36 :             return 1;
     204             : 
     205             :     // Anything really can be stored in img2
     206           0 :     return std_compliance < FF_COMPLIANCE_NORMAL;
     207             : }
     208             : 
     209             : #define OFFSET(x) offsetof(VideoMuxData, x)
     210             : #define ENC AV_OPT_FLAG_ENCODING_PARAM
     211             : static const AVOption muxoptions[] = {
     212             :     { "update",       "continuously overwrite one file", OFFSET(update),  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0,       1, ENC },
     213             :     { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT,  { .i64 = 1 }, 0, INT_MAX, ENC },
     214             :     { "strftime",     "use strftime for filename", OFFSET(use_strftime),  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
     215             :     { "frame_pts",    "use current frame pts for filename", OFFSET(frame_pts),  AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
     216             :     { "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
     217             :     { NULL },
     218             : };
     219             : 
     220             : #if CONFIG_IMAGE2_MUXER
     221             : static const AVClass img2mux_class = {
     222             :     .class_name = "image2 muxer",
     223             :     .item_name  = av_default_item_name,
     224             :     .option     = muxoptions,
     225             :     .version    = LIBAVUTIL_VERSION_INT,
     226             : };
     227             : 
     228             : AVOutputFormat ff_image2_muxer = {
     229             :     .name           = "image2",
     230             :     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
     231             :     .extensions     = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
     232             :                       "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
     233             :                       "sunras,xbm,xface,pix,y",
     234             :     .priv_data_size = sizeof(VideoMuxData),
     235             :     .video_codec    = AV_CODEC_ID_MJPEG,
     236             :     .write_header   = write_header,
     237             :     .write_packet   = write_packet,
     238             :     .query_codec    = query_codec,
     239             :     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
     240             :     .priv_class     = &img2mux_class,
     241             : };
     242             : #endif
     243             : #if CONFIG_IMAGE2PIPE_MUXER
     244             : AVOutputFormat ff_image2pipe_muxer = {
     245             :     .name           = "image2pipe",
     246             :     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
     247             :     .priv_data_size = sizeof(VideoMuxData),
     248             :     .video_codec    = AV_CODEC_ID_MJPEG,
     249             :     .write_header   = write_header,
     250             :     .write_packet   = write_packet,
     251             :     .query_codec    = query_codec,
     252             :     .flags          = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
     253             : };
     254             : #endif

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