mirror of
https://git.videolan.org/git/ffmpeg.git
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360 lines
8.2 KiB
C
360 lines
8.2 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 <unistd.h>
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#include "avformat.h"
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#ifdef __MINGW32__
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# include <windows.h>
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# define usleep(t) Sleep((t) / 1000)
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#endif
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#ifdef __BEOS__
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# ifndef usleep
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# include <OS.h>
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# define usleep(t) snooze((bigtime_t)(t))
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# endif
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#endif
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#if defined(CONFIG_OS2)
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# include <stdlib.h>
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# define usleep(t) _sleep2((t) / 1000)
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#endif
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typedef struct {
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int width;
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int height;
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int img_number;
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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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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;
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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 i, ret;
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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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strcpy(s->path, s1->filename);
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s->img_number = 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 (!s->is_pipe) {
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/* try to find the first image */
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for(i=0;i<5;i++) {
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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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break;
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s->img_number++;
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}
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if (i == 5)
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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, s->height);
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if (!ap || !ap->frame_rate)
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st->codec.frame_rate = 25 * FRAME_RATE_BASE;
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else
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st->codec.frame_rate = ap->frame_rate;
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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 -EIO;
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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, info->height);
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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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if (get_frame_filename(filename, sizeof(filename),
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s->path, s->img_number) < 0)
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return -EIO;
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f = &f1;
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if (url_fopen(f, filename, URL_RDONLY) < 0)
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return -EIO;
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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 -EIO;
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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 -EIO; /* signal EOF */
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} else {
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pkt->pts = ((int64_t)s->img_number * s1->pts_den * FRAME_RATE_BASE) / (s1->streams[0]->codec.frame_rate * s1->pts_num);
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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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strcpy(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, int stream_index,
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uint8_t *buf, int size, int force_pts)
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{
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VideoData *img = s->priv_data;
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AVStream *st = s->streams[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 *)buf;
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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 -EIO;
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pb = &pb1;
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if (url_fopen(pb, filename, URL_WRONLY) < 0)
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return -EIO;
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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.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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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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