412 lines
9.9 KiB
C
412 lines
9.9 KiB
C
/*
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* Image format
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
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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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int loop_input = 0;
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typedef struct {
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int width;
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int height;
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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 img_size;
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AVImageFormat *img_fmt;
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int pix_fmt;
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int is_pipe;
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char path[1024];
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/* temporary usage */
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void *ptr;
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} VideoData;
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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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goto fail;
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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 && guess_image_format(p->filename))
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return AVPROBE_SCORE_MAX-1;
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else
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return 0;
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}
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static int read_header_alloc_cb(void *opaque, AVImageInfo *info)
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{
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VideoData *s = opaque;
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s->width = info->width;
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s->height = info->height;
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s->pix_fmt = info->pix_fmt;
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/* stop image reading but no error */
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return 1;
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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 ret, first_index, last_index;
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char buf[1024];
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ByteIOContext pb1, *f = &pb1;
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AVStream *st;
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st = av_new_stream(s1, 0);
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if (!st) {
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av_free(s);
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return -ENOMEM;
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}
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if (ap && ap->image_format)
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s->img_fmt = ap->image_format;
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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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if (!ap || !ap->time_base.num) {
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st->codec.time_base= (AVRational){1,25};
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} else {
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st->codec.time_base= ap->time_base;
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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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goto fail;
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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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if (get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0)
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goto fail;
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if (url_fopen(f, buf, URL_RDONLY) < 0)
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goto fail;
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} else {
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f = &s1->pb;
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}
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ret = av_read_image(f, s1->filename, s->img_fmt, read_header_alloc_cb, s);
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if (ret < 0)
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goto fail1;
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if (!s->is_pipe) {
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url_fclose(f);
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} else {
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url_fseek(f, 0, SEEK_SET);
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}
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st->codec.codec_type = CODEC_TYPE_VIDEO;
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st->codec.codec_id = CODEC_ID_RAWVIDEO;
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st->codec.width = s->width;
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st->codec.height = s->height;
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st->codec.pix_fmt = s->pix_fmt;
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s->img_size = avpicture_get_size(s->pix_fmt, (s->width+15)&(~15), (s->height+15)&(~15));
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return 0;
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fail1:
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if (!s->is_pipe)
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url_fclose(f);
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fail:
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av_free(s);
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return AVERROR_IO;
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}
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static int read_packet_alloc_cb(void *opaque, AVImageInfo *info)
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{
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VideoData *s = opaque;
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if (info->width != s->width ||
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info->height != s->height)
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return -1;
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avpicture_fill(&info->pict, s->ptr, info->pix_fmt, (info->width+15)&(~15), (info->height+15)&(~15));
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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 ret;
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ByteIOContext f1, *f;
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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)
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return AVERROR_IO;
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f = &f1;
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if (url_fopen(f, filename, URL_RDONLY) < 0)
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return AVERROR_IO;
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} else {
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f = &s1->pb;
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if (url_feof(f))
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return AVERROR_IO;
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}
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av_new_packet(pkt, s->img_size);
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pkt->stream_index = 0;
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s->ptr = pkt->data;
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ret = av_read_image(f, filename, s->img_fmt, read_packet_alloc_cb, s);
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if (!s->is_pipe) {
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url_fclose(f);
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}
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if (ret < 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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/* XXX: computing this pts is not necessary as it is done in
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the generic code too */
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pkt->pts = av_rescale((int64_t)s->img_count * s1->streams[0]->codec.time_base.num, s1->streams[0]->time_base.den, s1->streams[0]->codec.time_base.den) / s1->streams[0]->time_base.num;
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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_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
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{
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VideoData *img = s->priv_data;
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AVStream *st;
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AVImageFormat *img_fmt;
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int i;
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/* find output image format */
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if (ap && ap->image_format) {
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img_fmt = ap->image_format;
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} else {
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img_fmt = guess_image_format(s->filename);
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}
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if (!img_fmt)
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return -1;
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if (s->nb_streams != 1)
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return -1;
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st = s->streams[0];
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/* we select the first matching format */
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for(i=0;i<PIX_FMT_NB;i++) {
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if (img_fmt->supported_pixel_formats & (1 << i))
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break;
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}
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if (i >= PIX_FMT_NB)
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return -1;
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img->img_fmt = img_fmt;
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img->pix_fmt = i;
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st->codec.pix_fmt = img->pix_fmt;
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return 0;
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}
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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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AVStream *st = s->streams[pkt->stream_index];
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ByteIOContext pb1, *pb;
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AVPicture *picture;
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int width, height, ret;
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char filename[1024];
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AVImageInfo info;
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width = st->codec.width;
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height = st->codec.height;
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picture = (AVPicture *)pkt->data;
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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)
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return AVERROR_IO;
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pb = &pb1;
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if (url_fopen(pb, filename, URL_WRONLY) < 0)
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return AVERROR_IO;
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} else {
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pb = &s->pb;
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}
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info.width = width;
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info.height = height;
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info.pix_fmt = st->codec.pix_fmt;
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info.interleaved = 0; /* FIXME: there should be a way to set it right */
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info.pict = *picture;
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ret = av_write_image(pb, img->img_fmt, &info);
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if (!img->is_pipe) {
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url_fclose(pb);
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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 image_iformat = {
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"image",
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"image 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 | AVFMT_NEEDNUMBER,
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};
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static AVInputFormat imagepipe_iformat = {
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"imagepipe",
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"piped image 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 image_oformat = {
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"image",
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"image 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_RAWVIDEO,
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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 | AVFMT_NEEDNUMBER | AVFMT_RAWPICTURE,
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img_set_parameters,
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};
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static AVOutputFormat imagepipe_oformat = {
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"imagepipe",
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"piped image 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_RAWVIDEO,
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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_RAWPICTURE,
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img_set_parameters,
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};
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int img_init(void)
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{
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av_register_input_format(&image_iformat);
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av_register_output_format(&image_oformat);
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av_register_input_format(&imagepipe_iformat);
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av_register_output_format(&imagepipe_oformat);
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return 0;
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}
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