/* 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){
*pfirst_index =
*plast_index = 1;
return 0;
}
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 img_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
VideoData *s = s1->priv_data;
char filename[1024];
int i;
int size[3]={0}, ret[3]={0};
ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
AVCodecContext *codec= &s1->streams[0]->codec;
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 && s->img_number > 1)
return AVERROR_IO;
for(i=0; i<3; i++){
if (url_fopen(f[i], filename, URL_RDONLY) < 0)
return AVERROR_IO;
size[i]= url_filesize(url_fileno(f[i]));
if(codec->codec_id != CODEC_ID_RAWVIDEO)
break;
filename[ strlen(filename) - 1 ]= 'U' + i;
}
if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
infer_size(&codec->width, &codec->height, size[0]);
} else {
f[0] = &s1->pb;
if (url_feof(f[0]))
return AVERROR_IO;
size[0]= 4096;
}
av_new_packet(pkt, size[0] + size[1] + size[2]);
pkt->stream_index = 0;
pkt->flags |= PKT_FLAG_KEY;
pkt->size= 0;
for(i=0; i<3; i++){
if(size[i]){
ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
if (!s->is_pipe)
url_fclose(f[i]);
if(ret[i]>0)
pkt->size += ret[i];
}
}
if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
av_free_packet(pkt);
return AVERROR_IO; /* signal EOF */
} else {
s->img_count++;
s->img_number++;
return 0;
}
}
static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
{
VideoData *img = s->priv_data;
ByteIOContext pb1, *pb;
char filename[1024];
if (!img->is_pipe) {
if (get_frame_filename(filename, sizeof(filename),
img->path, img->img_number) < 0 && img->img_number>1)
return AVERROR_IO;
pb = &pb1;
if (url_fopen(pb, filename, URL_WRONLY) < 0)
return AVERROR_IO;
} else {
pb = &s->pb;
}
put_buffer(pb, pkt->data, pkt->size);
put_flush_packet(pb);
if (!img->is_pipe) {
url_fclose(pb);
}
img->img_number++;
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 && s->img_number > 1)
return AVERROR_IO;
f = &f1;
if (url_fopen(f, filename, URL_RDONLY) < 0)
return AVERROR_IO;
} else {
f = &s1->pb;
if (url_feof(f))
return AVERROR_IO;
}
if (s->is_pipe) {
av_new_packet(pkt, 4096);
}else{
av_new_packet(pkt, url_filesize(url_fileno(f)));
}
pkt->stream_index = 0;
pkt->flags |= PKT_FLAG_KEY;
ret = get_buffer(f, pkt->data, pkt->size);
if (!s->is_pipe) {
url_fclose(f);
}
if (ret <= 0) {
av_free_packet(pkt);
return AVERROR_IO; /* signal EOF */
} else {
s->img_count++;
s->img_number++;
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 AVERROR_IO;
f = &f1;
if (url_fopen(f, filename, URL_RDONLY) < 0)
return AVERROR_IO;
} else {
f = &s1->pb;
if (url_feof(f))
return AVERROR_IO;
}
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 AVERROR_IO; /* 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->time_base.num, s1->streams[0]->time_base.den, s1->streams[0]->codec->time_base.den) / s1->streams[0]->time_base.num;
s->img_count++;
s->img_number++;
return 0;
}
}
static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
{
VideoData *img = s->priv_data;
ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
char filename[1024];
AVCodecContext *codec= &s->streams[ pkt->stream_index ]->codec;
int i;
if (!img->is_pipe) {
if (get_frame_filename(filename, sizeof(filename),
img->path, img->img_number) < 0 && img->img_number>1)
return AVERROR_IO;
for(i=0; i<3; i++){
if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
return AVERROR_IO;
if(codec->codec_id != CODEC_ID_RAWVIDEO)
break;
filename[ strlen(filename) - 1 ]= 'U' + i;
}
} else {
pb[0] = &s->pb;
}
if(codec->codec_id == CODEC_ID_RAWVIDEO){
int ysize = codec->width * codec->height;
put_buffer(pb[0], pkt->data , ysize);
put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
put_flush_packet(pb[1]);
put_flush_packet(pb[2]);
url_fclose(pb[1]);
url_fclose(pb[2]);
}else{
put_buffer(pb[0], pkt->data, pkt->size);
}
put_flush_packet(pb[0]);
if (!img->is_pipe) {
url_fclose(pb[0]);
}
img->img_number++;
return 0;
}
static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
{
VideoData *img = s->priv_data;
AVStream *st = s->streams[pkt->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 *)pkt->data;
if (!img->is_pipe) {
if (get_frame_filename(filename, sizeof(filename),
img->path, img->img_number) < 0)
return AVERROR_IO;
pb = &pb1;
if (url_fopen(pb, filename, URL_WRONLY) < 0)
return AVERROR_IO;
} else {
pb = &s->pb;
}
info.width = width;
info.height = height;
info.pix_fmt = st->codec->pix_fmt;
info.interleaved = 0; /* FIXME: there should be a way to set it right */
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_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) {
return -ENOMEM;
}
if (ap->image_format)
s->img_fmt = ap->image_format;
pstrcpy(s->path, sizeof(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->time_base.num) {
st->codec->time_base= (AVRational){1,25};
} else {
st->codec->time_base= ap->time_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 = last_index - first_index + 1;
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+15)&(~15), (s->height+15)&(~15));
return 0;
fail1:
if (!s->is_pipe)
url_fclose(f);
fail:
return AVERROR_IO;
}