+++ /dev/null
-/*
- * Image format
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-/* XXX: this is a hack */
-int loop_input = 0;
-
-typedef struct {
- int width;
- int height;
- int img_first;
- int img_last;
- int img_number;
- int img_count;
- int img_size;
- AVImageFormat *img_fmt;
- int pix_fmt;
- int is_pipe;
- char path[1024];
- /* temporary usage */
- void *ptr;
-} VideoData;
-
-
-/* return -1 if no image found */
-static int find_image_range(int *pfirst_index, int *plast_index,
- const char *path)
-{
- char buf[1024];
- int range, last_index, range1, first_index;
-
- /* find the first image */
- for(first_index = 0; first_index < 5; first_index++) {
- if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0)
- goto fail;
- if (url_exist(buf))
- break;
- }
- if (first_index == 5)
- goto fail;
-
- /* find the last image */
- last_index = first_index;
- for(;;) {
- range = 0;
- for(;;) {
- if (!range)
- range1 = 1;
- else
- range1 = 2 * range;
- if (get_frame_filename(buf, sizeof(buf), path,
- last_index + range1) < 0)
- goto fail;
- if (!url_exist(buf))
- break;
- range = range1;
- /* just in case... */
- if (range >= (1 << 30))
- goto fail;
- }
- /* we are sure than image last_index + range exists */
- if (!range)
- break;
- last_index += range;
- }
- *pfirst_index = first_index;
- *plast_index = last_index;
- return 0;
- fail:
- return -1;
-}
-
-
-static int image_probe(AVProbeData *p)
-{
- if (filename_number_test(p->filename) >= 0 && guess_image_format(p->filename))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static int read_header_alloc_cb(void *opaque, AVImageInfo *info)
-{
- VideoData *s = opaque;
-
- s->width = info->width;
- s->height = info->height;
- s->pix_fmt = info->pix_fmt;
- /* stop image reading but no error */
- return 1;
-}
-
-static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
-{
- VideoData *s = s1->priv_data;
- int ret, first_index, last_index;
- char buf[1024];
- ByteIOContext pb1, *f = &pb1;
- AVStream *st;
-
- st = av_new_stream(s1, 0);
- if (!st) {
- av_free(s);
- return -ENOMEM;
- }
-
- if (ap && ap->image_format)
- s->img_fmt = ap->image_format;
-
- strcpy(s->path, s1->filename);
- s->img_number = 0;
- s->img_count = 0;
-
- /* find format */
- if (s1->iformat->flags & AVFMT_NOFILE)
- s->is_pipe = 0;
- else
- s->is_pipe = 1;
-
- if (!ap || !ap->frame_rate) {
- st->codec.frame_rate = 25;
- st->codec.frame_rate_base = 1;
- } else {
- st->codec.frame_rate = ap->frame_rate;
- st->codec.frame_rate_base = ap->frame_rate_base;
- }
-
- if (!s->is_pipe) {
- if (find_image_range(&first_index, &last_index, s->path) < 0)
- goto fail;
- s->img_first = first_index;
- s->img_last = last_index;
- s->img_number = first_index;
- /* compute duration */
- st->start_time = 0;
- st->duration = ((int64_t)AV_TIME_BASE *
- (last_index - first_index + 1) *
- st->codec.frame_rate_base) / st->codec.frame_rate;
- if (get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0)
- goto fail;
- if (url_fopen(f, buf, URL_RDONLY) < 0)
- goto fail;
- } else {
- f = &s1->pb;
- }
-
- ret = av_read_image(f, s1->filename, s->img_fmt, read_header_alloc_cb, s);
- if (ret < 0)
- goto fail1;
-
- if (!s->is_pipe) {
- url_fclose(f);
- } else {
- url_fseek(f, 0, SEEK_SET);
- }
-
- st->codec.codec_type = CODEC_TYPE_VIDEO;
- st->codec.codec_id = CODEC_ID_RAWVIDEO;
- st->codec.width = s->width;
- st->codec.height = s->height;
- st->codec.pix_fmt = s->pix_fmt;
- s->img_size = avpicture_get_size(s->pix_fmt, s->width, s->height);
-
- return 0;
- fail1:
- if (!s->is_pipe)
- url_fclose(f);
- fail:
- av_free(s);
- return -EIO;
-}
-
-static int read_packet_alloc_cb(void *opaque, AVImageInfo *info)
-{
- VideoData *s = opaque;
-
- if (info->width != s->width ||
- info->height != s->height)
- return -1;
- avpicture_fill(&info->pict, s->ptr, info->pix_fmt, info->width, info->height);
- return 0;
-}
-
-static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
-{
- VideoData *s = s1->priv_data;
- char filename[1024];
- int ret;
- ByteIOContext f1, *f;
-
- if (!s->is_pipe) {
- /* loop over input */
- if (loop_input && s->img_number > s->img_last) {
- s->img_number = s->img_first;
- }
- if (get_frame_filename(filename, sizeof(filename),
- s->path, s->img_number) < 0)
- return -EIO;
- f = &f1;
- if (url_fopen(f, filename, URL_RDONLY) < 0)
- return -EIO;
- } else {
- f = &s1->pb;
- if (url_feof(f))
- return -EIO;
- }
-
- av_new_packet(pkt, s->img_size);
- pkt->stream_index = 0;
-
- s->ptr = pkt->data;
- ret = av_read_image(f, filename, s->img_fmt, read_packet_alloc_cb, s);
- if (!s->is_pipe) {
- url_fclose(f);
- }
-
- if (ret < 0) {
- av_free_packet(pkt);
- return -EIO; /* signal EOF */
- } else {
- /* XXX: computing this pts is not necessary as it is done in
- the generic code too */
- pkt->pts = av_rescale((int64_t)s->img_count * s1->streams[0]->codec.frame_rate_base, s1->pts_den, s1->streams[0]->codec.frame_rate) / s1->pts_num;
- s->img_count++;
- s->img_number++;
- return 0;
- }
-}
-
-static int img_read_close(AVFormatContext *s1)
-{
- return 0;
-}
-
-/******************************************************/
-/* image output */
-
-static int img_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
-{
- VideoData *img = s->priv_data;
- AVStream *st;
- AVImageFormat *img_fmt;
- int i;
-
- /* find output image format */
- if (ap && ap->image_format) {
- img_fmt = ap->image_format;
- } else {
- img_fmt = guess_image_format(s->filename);
- }
- if (!img_fmt)
- return -1;
-
- if (s->nb_streams != 1)
- return -1;
-
- st = s->streams[0];
- /* we select the first matching format */
- for(i=0;i<PIX_FMT_NB;i++) {
- if (img_fmt->supported_pixel_formats & (1 << i))
- break;
- }
- if (i >= PIX_FMT_NB)
- return -1;
- img->img_fmt = img_fmt;
- img->pix_fmt = i;
- st->codec.pix_fmt = img->pix_fmt;
- return 0;
-}
-
-static int img_write_header(AVFormatContext *s)
-{
- VideoData *img = s->priv_data;
-
- img->img_number = 1;
- strcpy(img->path, s->filename);
-
- /* find format */
- if (s->oformat->flags & AVFMT_NOFILE)
- img->is_pipe = 0;
- else
- img->is_pipe = 1;
-
- return 0;
-}
-
-static int img_write_packet(AVFormatContext *s, int stream_index,
- const uint8_t *buf, int size, int64_t pts)
-{
- VideoData *img = s->priv_data;
- AVStream *st = s->streams[stream_index];
- ByteIOContext pb1, *pb;
- AVPicture *picture;
- int width, height, ret;
- char filename[1024];
- AVImageInfo info;
-
- width = st->codec.width;
- height = st->codec.height;
-
- picture = (AVPicture *)buf;
-
- if (!img->is_pipe) {
- if (get_frame_filename(filename, sizeof(filename),
- img->path, img->img_number) < 0)
- return -EIO;
- pb = &pb1;
- if (url_fopen(pb, filename, URL_WRONLY) < 0)
- return -EIO;
- } else {
- pb = &s->pb;
- }
- info.width = width;
- info.height = height;
- info.pix_fmt = st->codec.pix_fmt;
- info.pict = *picture;
- ret = av_write_image(pb, img->img_fmt, &info);
- if (!img->is_pipe) {
- url_fclose(pb);
- }
-
- img->img_number++;
- return 0;
-}
-
-static int img_write_trailer(AVFormatContext *s)
-{
- return 0;
-}
-
-/* input */
-
-static AVInputFormat image_iformat = {
- "image",
- "image sequence",
- sizeof(VideoData),
- image_probe,
- img_read_header,
- img_read_packet,
- img_read_close,
- NULL,
- AVFMT_NOFILE | AVFMT_NEEDNUMBER,
-};
-
-static AVInputFormat imagepipe_iformat = {
- "imagepipe",
- "piped image sequence",
- sizeof(VideoData),
- NULL, /* no probe */
- img_read_header,
- img_read_packet,
- img_read_close,
- NULL,
-};
-
-
-/* output */
-
-static AVOutputFormat image_oformat = {
- "image",
- "image sequence",
- "",
- "",
- sizeof(VideoData),
- CODEC_ID_NONE,
- CODEC_ID_RAWVIDEO,
- img_write_header,
- img_write_packet,
- img_write_trailer,
- AVFMT_NOFILE | AVFMT_NEEDNUMBER | AVFMT_RAWPICTURE,
- img_set_parameters,
-};
-
-static AVOutputFormat imagepipe_oformat = {
- "imagepipe",
- "piped image sequence",
- "",
- "",
- sizeof(VideoData),
- CODEC_ID_NONE,
- CODEC_ID_RAWVIDEO,
- img_write_header,
- img_write_packet,
- img_write_trailer,
- AVFMT_RAWPICTURE,
- img_set_parameters,
-};
-
-int img_init(void)
-{
- av_register_input_format(&image_iformat);
- av_register_output_format(&image_oformat);
-
- av_register_input_format(&imagepipe_iformat);
- av_register_output_format(&imagepipe_oformat);
-
- return 0;
-}
projects / synfig.git / blobdiff