--- /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