182 lines
6.5 KiB
C
182 lines
6.5 KiB
C
/*
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* Image format
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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* Copyright (c) 2004 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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typedef struct {
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const AVClass *class; /**< Class for private options. */
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int img_number;
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int is_pipe;
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int split_planes; /**< use independent file for each Y, U, V plane */
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char path[1024];
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int update;
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int use_strftime;
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} VideoMuxData;
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static int write_header(AVFormatContext *s)
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{
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VideoMuxData *img = s->priv_data;
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AVStream *st = s->streams[0];
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codec->pix_fmt);
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const char *str;
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av_strlcpy(img->path, s->filename, sizeof(img->path));
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/* find format */
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if (s->oformat->flags & AVFMT_NOFILE)
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img->is_pipe = 0;
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else
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img->is_pipe = 1;
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str = strrchr(img->path, '.');
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img->split_planes = str
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&& !av_strcasecmp(str + 1, "y")
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&& s->nb_streams == 1
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&& st->codec->codec_id == AV_CODEC_ID_RAWVIDEO
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&& desc
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&&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
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&& desc->nb_components >= 3;
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return 0;
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}
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static int write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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VideoMuxData *img = s->priv_data;
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AVIOContext *pb[4];
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char filename[1024];
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AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(codec->pix_fmt);
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int i;
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if (!img->is_pipe) {
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if (img->update) {
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av_strlcpy(filename, img->path, sizeof(filename));
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} else if (img->use_strftime) {
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time_t now0;
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struct tm *tm;
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time(&now0);
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tm = localtime(&now0);
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if (!strftime(filename, sizeof(filename), img->path, tm)) {
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av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
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return AVERROR(EINVAL);
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}
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} else if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 &&
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img->img_number > 1) {
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av_log(s, AV_LOG_ERROR,
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"Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
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img->img_number, img->path);
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return AVERROR(EINVAL);
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}
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for (i = 0; i < 4; i++) {
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if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
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&s->interrupt_callback, NULL) < 0) {
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av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", filename);
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return AVERROR(EIO);
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}
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if (!img->split_planes || i+1 >= desc->nb_components)
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break;
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filename[strlen(filename) - 1] = ((int[]){'U','V','A','x'})[i];
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}
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} else {
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pb[0] = s->pb;
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}
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if (img->split_planes) {
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int ysize = codec->width * codec->height;
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int usize = FF_CEIL_RSHIFT(codec->width, desc->log2_chroma_w) * FF_CEIL_RSHIFT(codec->height, desc->log2_chroma_h);
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if (desc->comp[0].depth_minus1 >= 8) {
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ysize *= 2;
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usize *= 2;
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}
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avio_write(pb[0], pkt->data , ysize);
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avio_write(pb[1], pkt->data + ysize , usize);
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avio_write(pb[2], pkt->data + ysize + usize, usize);
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avio_close(pb[1]);
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avio_close(pb[2]);
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if (desc->nb_components > 3) {
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avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
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avio_close(pb[3]);
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}
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} else {
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avio_write(pb[0], pkt->data, pkt->size);
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}
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avio_flush(pb[0]);
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if (!img->is_pipe) {
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avio_close(pb[0]);
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}
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img->img_number++;
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return 0;
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}
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#define OFFSET(x) offsetof(VideoMuxData, x)
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption muxoptions[] = {
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{ "updatefirst", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
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{ "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
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{ "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
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{ "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
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{ NULL },
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};
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#if CONFIG_IMAGE2_MUXER
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static const AVClass img2mux_class = {
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.class_name = "image2 muxer",
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.item_name = av_default_item_name,
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.option = muxoptions,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVOutputFormat ff_image2_muxer = {
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.name = "image2",
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.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
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.extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
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"ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
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"sunras,xbm,xface",
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.priv_data_size = sizeof(VideoMuxData),
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.video_codec = AV_CODEC_ID_MJPEG,
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.write_header = write_header,
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.write_packet = write_packet,
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.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
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.priv_class = &img2mux_class,
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};
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#endif
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#if CONFIG_IMAGE2PIPE_MUXER
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AVOutputFormat ff_image2pipe_muxer = {
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.name = "image2pipe",
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.long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
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.priv_data_size = sizeof(VideoMuxData),
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.video_codec = AV_CODEC_ID_MJPEG,
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.write_header = write_header,
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.write_packet = write_packet,
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.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
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};
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#endif
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