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Diffstat (limited to 'ffmpeg/libavformat/img2enc.c')
| -rw-r--r-- | ffmpeg/libavformat/img2enc.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/img2enc.c b/ffmpeg/libavformat/img2enc.c new file mode 100644 index 0000000..67b5819 --- /dev/null +++ b/ffmpeg/libavformat/img2enc.c @@ -0,0 +1,168 @@ +/* + * Image format + * Copyright (c) 2000, 2001, 2002 Fabrice Bellard + * Copyright (c) 2004 Michael Niedermayer + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; 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 "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avformat.h" +#include "avio_internal.h" +#include "internal.h" +#include "libavutil/opt.h" + +typedef struct { + const AVClass *class; /**< Class for private options. */ + int img_number; + int is_pipe; + int split_planes; /**< use independent file for each Y, U, V plane */ + char path[1024]; + int updatefirst; +} VideoMuxData; + +static int write_header(AVFormatContext *s) +{ + VideoMuxData *img = s->priv_data; + AVStream *st = s->streams[0]; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codec->pix_fmt); + const char *str; + + 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; + + str = strrchr(img->path, '.'); + img->split_planes = str + && !av_strcasecmp(str + 1, "y") + && s->nb_streams == 1 + && st->codec->codec_id == AV_CODEC_ID_RAWVIDEO + && desc + &&(desc->flags & PIX_FMT_PLANAR) + && desc->nb_components >= 3; + return 0; +} + +static int write_packet(AVFormatContext *s, AVPacket *pkt) +{ + VideoMuxData *img = s->priv_data; + AVIOContext *pb[4]; + char filename[1024]; + AVCodecContext *codec = s->streams[pkt->stream_index]->codec; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(codec->pix_fmt); + int i; + + if (!img->is_pipe) { + if (av_get_frame_filename(filename, sizeof(filename), + img->path, img->img_number) < 0 && img->img_number > 1 && !img->updatefirst) { + av_log(s, AV_LOG_ERROR, + "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n", + img->img_number, img->path); + return AVERROR(EINVAL); + } + for (i = 0; i < 4; 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 (!img->split_planes || i+1 >= desc->nb_components) + break; + filename[strlen(filename) - 1] = ((int[]){'U','V','A','x'})[i]; + } + } else { + pb[0] = s->pb; + } + + if (img->split_planes) { + int ysize = codec->width * codec->height; + int usize = ((-codec->width)>>desc->log2_chroma_w) * ((-codec->height)>>desc->log2_chroma_h); + if (desc->comp[0].depth_minus1 >= 8) { + ysize *= 2; + usize *= 2; + } + avio_write(pb[0], pkt->data , ysize); + avio_write(pb[1], pkt->data + ysize , usize); + avio_write(pb[2], pkt->data + ysize + usize, usize); + avio_close(pb[1]); + avio_close(pb[2]); + if (desc->nb_components > 3) { + avio_write(pb[3], pkt->data + ysize + 2*usize, ysize); + avio_close(pb[3]); + } + } else { + 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; +} + +#define OFFSET(x) offsetof(VideoMuxData, x) +#define ENC AV_OPT_FLAG_ENCODING_PARAM +static const AVOption muxoptions[] = { + { "updatefirst", "update the first image file", OFFSET(updatefirst), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC }, + { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, ENC }, + { NULL }, +}; + +#if CONFIG_IMAGE2_MUXER +static const AVClass img2mux_class = { + .class_name = "image2 muxer", + .item_name = av_default_item_name, + .option = muxoptions, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVOutputFormat ff_image2_muxer = { + .name = "image2", + .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"), + .extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png," + "ppm,sgi,tga,tif,tiff,jp2,j2c,xwd,sun,ras,rs,im1,im8,im24," + "sunras,xbm,xface", + .priv_data_size = sizeof(VideoMuxData), + .video_codec = AV_CODEC_ID_MJPEG, + .write_header = write_header, + .write_packet = write_packet, + .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE, + .priv_class = &img2mux_class, +}; +#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 = AV_CODEC_ID_MJPEG, + .write_header = write_header, + .write_packet = write_packet, + .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS +}; +#endif |