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avformat/concatdec: factorize the duration calculating function

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2018-11-22 00:57:01 +01:00
parent 87c165c237
commit 0a98622cbe
1 changed files with 23 additions and 14 deletions
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37
libavformat/concatdec.c
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@ -45,6 +45,7 @@ typedef struct {
int64_t file_start_time;
int64_t file_inpoint;
int64_t duration;
int64_t user_duration;
int64_t next_dts;
ConcatStream *streams;
int64_t inpoint;
@ -154,6 +155,7 @@ static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
file->next_dts = AV_NOPTS_VALUE;
file->inpoint = AV_NOPTS_VALUE;
file->outpoint = AV_NOPTS_VALUE;
file->user_duration = AV_NOPTS_VALUE;
return 0;
@ -314,6 +316,19 @@ static int match_streams(AVFormatContext *avf)
return 0;
}
static int64_t get_best_effort_duration(ConcatFile *file, AVFormatContext *avf)
{
if (file->user_duration != AV_NOPTS_VALUE)
return file->user_duration;
if (file->outpoint != AV_NOPTS_VALUE)
return file->outpoint - file->file_inpoint;
if (avf->duration > 0)
return avf->duration - (file->file_inpoint - file->file_start_time);
if (file->next_dts != AV_NOPTS_VALUE)
return file->next_dts - (file->file_inpoint - file->file_start_time);
return AV_NOPTS_VALUE;
}
static int open_file(AVFormatContext *avf, unsigned fileno)
{
ConcatContext *cat = avf->priv_data;
@ -346,8 +361,8 @@ static int open_file(AVFormatContext *avf, unsigned fileno)
cat->files[fileno - 1].duration;
file->file_start_time = (cat->avf->start_time == AV_NOPTS_VALUE) ? 0 : cat->avf->start_time;
file->file_inpoint = (file->inpoint == AV_NOPTS_VALUE) ? file->file_start_time : file->inpoint;
if (file->duration == AV_NOPTS_VALUE && file->outpoint != AV_NOPTS_VALUE)
file->duration = file->outpoint - file->file_inpoint;
if (file->duration == AV_NOPTS_VALUE)
file->duration = get_best_effort_duration(file, cat->avf);
if (cat->segment_time_metadata) {
av_dict_set_int(&file->metadata, "lavf.concatdec.start_time", file->start_time, 0);
@ -425,7 +440,7 @@ static int concat_read_header(AVFormatContext *avf)
goto fail;
}
if (!strcmp(keyword, "duration"))
file->duration = dur;
file->user_duration = dur;
else if (!strcmp(keyword, "inpoint"))
file->inpoint = dur;
else if (!strcmp(keyword, "outpoint"))
@ -484,12 +499,12 @@ static int concat_read_header(AVFormatContext *avf)
cat->files[i].start_time = time;
else
time = cat->files[i].start_time;
if (cat->files[i].duration == AV_NOPTS_VALUE) {
if (cat->files[i].user_duration == AV_NOPTS_VALUE) {
if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE)
break;
cat->files[i].duration = cat->files[i].outpoint - cat->files[i].inpoint;
cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint;
}
time += cat->files[i].duration;
time += cat->files[i].user_duration;
}
if (i == cat->nb_files) {
avf->duration = time;
@ -514,14 +529,8 @@ static int open_next_file(AVFormatContext *avf)
ConcatContext *cat = avf->priv_data;
unsigned fileno = cat->cur_file - cat->files;
if (cat->cur_file->duration == AV_NOPTS_VALUE) {
if (cat->avf->duration > 0 || cat->cur_file->next_dts == AV_NOPTS_VALUE) {
cat->cur_file->duration = cat->avf->duration;
} else {
cat->cur_file->duration = cat->cur_file->next_dts;
}
cat->cur_file->duration -= (cat->cur_file->file_inpoint - cat->cur_file->file_start_time);
}
if (cat->cur_file->duration == AV_NOPTS_VALUE)
cat->cur_file->duration = get_best_effort_duration(cat->cur_file, cat->avf);
if (++fileno >= cat->nb_files) {
cat->eof = 1;