From 15b4b505c2700ea1ba88cedccc183b854c546e02 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Tue, 21 Feb 2012 21:07:56 +0000 Subject: img2: split muxer and demuxer into separate files Signed-off-by: Paul B Mahol Signed-off-by: Diego Biurrun --- libavformat/img2enc.c | 151 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 libavformat/img2enc.c (limited to 'libavformat/img2enc.c') 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 -- cgit v1.2.3