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image2: Add "start_number" private option to the demuxer

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Currently if a pattern is given we search for up to the fifth file name in
that sequence. This option sets that limit to an arbitrary number.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mashiat Sarker Shakkhar 2012-06-24 13:40:50 +06:00 committed by Michael Niedermayer
parent eeddd3962e
commit 98b3f17bd7
1 changed files with 6 additions and 4 deletions
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10
libavformat/img2dec.c
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@ -58,6 +58,7 @@ typedef struct {
#if HAVE_GLOB
glob_t globstate;
#endif
int start_number;
} VideoDemuxData;
static const int sizes[][2] = {
@ -109,13 +110,13 @@ static int is_glob(const char *path)
/* return -1 if no image found */
static int find_image_range(int *pfirst_index, int *plast_index,
const char *path)
const char *path, int max_start)
{
char buf[1024];
int range, last_index, range1, first_index;
/* find the first image */
for(first_index = 0; first_index < 5; first_index++) {
for(first_index = max_start; first_index < max_start + 5; first_index++) {
if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
*pfirst_index =
*plast_index = 1;
@ -251,8 +252,8 @@ static int read_header(AVFormatContext *s1)
last_index = s->globstate.gl_pathc - 1;
#endif
} else {
if (find_image_range(&first_index, &last_index, s->path) < 0)
return AVERROR(ENOENT);
if (find_image_range(&first_index, &last_index, s->path, s->start_number - 1) < 0)
return AVERROR(ENOENT);
}
s->img_first = first_index;
s->img_last = last_index;
@ -375,6 +376,7 @@ static const AVOption options[] = {
{ "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
{ "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, DEC },
{ "start_number", "first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.dbl = 1}, 1, INT_MAX, DEC },
{ NULL },
};