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427 lines
11 KiB
427 lines
11 KiB
/* |
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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 library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "avformat.h" |
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/* XXX: this is a hack */ |
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extern int loop_input; |
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typedef struct { |
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int img_first; |
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int img_last; |
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int img_number; |
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int img_count; |
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int is_pipe; |
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char path[1024]; |
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} VideoData; |
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typedef struct { |
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enum CodecID id; |
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const char *str; |
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} IdStrMap; |
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static const IdStrMap img_tags[] = { |
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{ CODEC_ID_MJPEG , "jpeg"}, |
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{ CODEC_ID_MJPEG , "jpg"}, |
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{ CODEC_ID_LJPEG , "ljpg"}, |
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{ CODEC_ID_PNG , "png"}, |
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{ CODEC_ID_PPM , "ppm"}, |
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{ CODEC_ID_PGM , "pgm"}, |
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{ CODEC_ID_PGMYUV , "pgmyuv"}, |
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{ CODEC_ID_PBM , "pbm"}, |
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{ CODEC_ID_PAM , "pam"}, |
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{ CODEC_ID_MPEG1VIDEO, "mpg1-img"}, |
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{ CODEC_ID_MPEG2VIDEO, "mpg2-img"}, |
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{ CODEC_ID_MPEG4 , "mpg4-img"}, |
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{ CODEC_ID_FFV1 , "ffv1-img"}, |
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{ CODEC_ID_RAWVIDEO , "y"}, |
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{0, NULL} |
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}; |
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static int sizes[][2] = { |
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{ 640, 480 }, |
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{ 720, 480 }, |
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{ 720, 576 }, |
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{ 352, 288 }, |
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{ 352, 240 }, |
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{ 160, 128 }, |
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{ 512, 384 }, |
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{ 640, 352 }, |
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{ 640, 240 }, |
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}; |
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static int infer_size(int *width_ptr, int *height_ptr, int size) |
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{ |
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int i; |
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for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) { |
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if ((sizes[i][0] * sizes[i][1]) == size) { |
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*width_ptr = sizes[i][0]; |
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*height_ptr = sizes[i][1]; |
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return 0; |
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} |
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} |
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return -1; |
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} |
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static enum CodecID av_str2id(const IdStrMap *tags, const char *str) |
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{ |
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str= strrchr(str, '.'); |
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if(!str) return CODEC_ID_NONE; |
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str++; |
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while (tags->id) { |
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int i; |
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for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){ |
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if(tags->str[i]==0 && str[i]==0) |
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return tags->id; |
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} |
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tags++; |
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} |
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return CODEC_ID_NONE; |
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} |
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/* return -1 if no image found */ |
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static int find_image_range(int *pfirst_index, int *plast_index, |
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const char *path) |
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{ |
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char buf[1024]; |
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int range, last_index, range1, first_index; |
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/* find the first image */ |
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for(first_index = 0; first_index < 5; first_index++) { |
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if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0){ |
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*pfirst_index = |
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*plast_index = 1; |
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return 0; |
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} |
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if (url_exist(buf)) |
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break; |
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} |
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if (first_index == 5) |
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goto fail; |
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/* find the last image */ |
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last_index = first_index; |
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for(;;) { |
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range = 0; |
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for(;;) { |
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if (!range) |
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range1 = 1; |
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else |
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range1 = 2 * range; |
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if (get_frame_filename(buf, sizeof(buf), path, |
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last_index + range1) < 0) |
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goto fail; |
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if (!url_exist(buf)) |
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break; |
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range = range1; |
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/* just in case... */ |
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if (range >= (1 << 30)) |
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goto fail; |
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} |
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/* we are sure than image last_index + range exists */ |
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if (!range) |
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break; |
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last_index += range; |
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} |
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*pfirst_index = first_index; |
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*plast_index = last_index; |
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return 0; |
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fail: |
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return -1; |
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} |
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static int image_probe(AVProbeData *p) |
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{ |
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if (filename_number_test(p->filename) >= 0 && av_str2id(img_tags, p->filename)) |
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return AVPROBE_SCORE_MAX; |
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else |
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return 0; |
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} |
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enum CodecID av_guess_image2_codec(const char *filename){ |
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return av_str2id(img_tags, filename); |
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} |
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static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap) |
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{ |
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VideoData *s = s1->priv_data; |
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int first_index, last_index; |
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AVStream *st; |
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s1->ctx_flags |= AVFMTCTX_NOHEADER; |
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st = av_new_stream(s1, 0); |
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if (!st) { |
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return -ENOMEM; |
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} |
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pstrcpy(s->path, sizeof(s->path), s1->filename); |
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s->img_number = 0; |
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s->img_count = 0; |
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/* find format */ |
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if (s1->iformat->flags & AVFMT_NOFILE) |
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s->is_pipe = 0; |
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else{ |
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s->is_pipe = 1; |
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st->need_parsing= 1; |
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} |
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if (!ap || !ap->time_base.num) { |
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av_set_pts_info(st, 60, 1, 25); |
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} else { |
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av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den); |
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} |
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if(ap && ap->width && ap->height){ |
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st->codec.width = ap->width; |
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st->codec.height= ap->height; |
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} |
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if (!s->is_pipe) { |
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if (find_image_range(&first_index, &last_index, s->path) < 0) |
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return AVERROR_IO; |
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s->img_first = first_index; |
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s->img_last = last_index; |
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s->img_number = first_index; |
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/* compute duration */ |
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st->start_time = 0; |
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st->duration = last_index - first_index + 1; |
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} |
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if(ap->video_codec_id){ |
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st->codec.codec_type = CODEC_TYPE_VIDEO; |
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st->codec.codec_id = ap->video_codec_id; |
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}else if(ap->audio_codec_id){ |
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st->codec.codec_type = CODEC_TYPE_AUDIO; |
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st->codec.codec_id = ap->audio_codec_id; |
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}else{ |
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st->codec.codec_type = CODEC_TYPE_VIDEO; |
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st->codec.codec_id = av_str2id(img_tags, s->path); |
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} |
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if(st->codec.codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE) |
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st->codec.pix_fmt = ap->pix_fmt; |
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return 0; |
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} |
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static int img_read_packet(AVFormatContext *s1, AVPacket *pkt) |
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{ |
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VideoData *s = s1->priv_data; |
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char filename[1024]; |
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int i; |
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int size[3]={0}, ret[3]={0}; |
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ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]}; |
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AVCodecContext *codec= &s1->streams[0]->codec; |
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if (!s->is_pipe) { |
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/* loop over input */ |
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if (loop_input && s->img_number > s->img_last) { |
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s->img_number = s->img_first; |
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} |
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if (get_frame_filename(filename, sizeof(filename), |
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s->path, s->img_number)<0 && s->img_number > 1) |
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return AVERROR_IO; |
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for(i=0; i<3; i++){ |
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if (url_fopen(f[i], filename, URL_RDONLY) < 0) |
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return AVERROR_IO; |
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size[i]= url_filesize(url_fileno(f[i])); |
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if(codec->codec_id != CODEC_ID_RAWVIDEO) |
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break; |
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filename[ strlen(filename) - 1 ]= 'U' + i; |
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} |
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if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width) |
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infer_size(&codec->width, &codec->height, size[0]); |
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} else { |
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f[0] = &s1->pb; |
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if (url_feof(f[0])) |
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return AVERROR_IO; |
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size[0]= 4096; |
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} |
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av_new_packet(pkt, size[0] + size[1] + size[2]); |
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pkt->stream_index = 0; |
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pkt->flags |= PKT_FLAG_KEY; |
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pkt->size= 0; |
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for(i=0; i<3; i++){ |
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if(size[i]){ |
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ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]); |
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if (!s->is_pipe) |
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url_fclose(f[i]); |
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if(ret[i]>0) |
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pkt->size += ret[i]; |
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} |
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} |
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if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) { |
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av_free_packet(pkt); |
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return AVERROR_IO; /* signal EOF */ |
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} else { |
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s->img_count++; |
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s->img_number++; |
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return 0; |
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} |
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} |
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static int img_read_close(AVFormatContext *s1) |
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{ |
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return 0; |
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} |
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/******************************************************/ |
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/* image output */ |
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static int img_write_header(AVFormatContext *s) |
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{ |
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VideoData *img = s->priv_data; |
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img->img_number = 1; |
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pstrcpy(img->path, sizeof(img->path), s->filename); |
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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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return 0; |
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} |
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static int img_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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VideoData *img = s->priv_data; |
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ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]}; |
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char filename[1024]; |
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AVCodecContext *codec= &s->streams[ pkt->stream_index ]->codec; |
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int i; |
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if (!img->is_pipe) { |
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if (get_frame_filename(filename, sizeof(filename), |
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img->path, img->img_number) < 0 && img->img_number>1) |
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return AVERROR_IO; |
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for(i=0; i<3; i++){ |
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if (url_fopen(pb[i], filename, URL_WRONLY) < 0) |
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return AVERROR_IO; |
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if(codec->codec_id != CODEC_ID_RAWVIDEO) |
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break; |
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filename[ strlen(filename) - 1 ]= 'U' + 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(codec->codec_id == CODEC_ID_RAWVIDEO){ |
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int ysize = codec->width * codec->height; |
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put_buffer(pb[0], pkt->data , ysize); |
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put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2); |
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put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2); |
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put_flush_packet(pb[1]); |
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put_flush_packet(pb[2]); |
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url_fclose(pb[1]); |
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url_fclose(pb[2]); |
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}else{ |
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put_buffer(pb[0], pkt->data, pkt->size); |
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} |
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put_flush_packet(pb[0]); |
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if (!img->is_pipe) { |
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url_fclose(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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static int img_write_trailer(AVFormatContext *s) |
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{ |
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return 0; |
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} |
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/* input */ |
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static AVInputFormat image2_iformat = { |
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"image2", |
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"image2 sequence", |
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sizeof(VideoData), |
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image_probe, |
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img_read_header, |
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img_read_packet, |
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img_read_close, |
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NULL, |
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NULL, |
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AVFMT_NOFILE, |
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}; |
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static AVInputFormat image2pipe_iformat = { |
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"image2pipe", |
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"piped image2 sequence", |
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sizeof(VideoData), |
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NULL, /* no probe */ |
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img_read_header, |
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img_read_packet, |
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img_read_close, |
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NULL, |
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}; |
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/* output */ |
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static AVOutputFormat image2_oformat = { |
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"image2", |
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"image2 sequence", |
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"", |
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"", |
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sizeof(VideoData), |
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CODEC_ID_NONE, |
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CODEC_ID_MJPEG, |
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img_write_header, |
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img_write_packet, |
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img_write_trailer, |
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AVFMT_NOFILE, |
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}; |
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static AVOutputFormat image2pipe_oformat = { |
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"image2pipe", |
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"piped image2 sequence", |
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"", |
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"", |
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sizeof(VideoData), |
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CODEC_ID_NONE, |
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CODEC_ID_MJPEG, |
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img_write_header, |
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img_write_packet, |
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img_write_trailer, |
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}; |
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int img2_init(void) |
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{ |
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av_register_input_format(&image2_iformat); |
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av_register_output_format(&image2_oformat); |
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av_register_input_format(&image2pipe_iformat); |
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av_register_output_format(&image2pipe_oformat); |
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return 0; |
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}
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