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avfilter/src_movie: add various commands

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add seek command
add get_duration command

Update to codecpar by commiter

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Muhammad Faiz 2016-02-17 23:20:08 +07:00 committed by Michael Niedermayer
parent d14deeb6bc
commit defab0825f
2 changed files with 69 additions and 0 deletions
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24
doc/filters.texi
View File

@ -16976,4 +16976,28 @@ movie=dvd.vob:s=v:0+#0x81 [video] [audio]
@end example
@end itemize
@subsection Commands
Both movie and amovie support the following commands:
@table @option
@item seek
Perform seek using "av_seek_frame".
The syntax is: seek @var{stream_index}|@var{timestamp}|@var{flags}
@itemize
@item
@var{stream_index}: If stream_index is -1, a default
stream is selected, and @var{timestamp} is automatically converted
from AV_TIME_BASE units to the stream specific time_base.
@item
@var{timestamp}: Timestamp in AVStream.time_base units
or, if no stream is specified, in AV_TIME_BASE units.
@item
@var{flags}: Flags which select direction and seeking mode.
@end itemize
@item get_duration
Get movie duration in AV_TIME_BASE units.
@end table
@c man end MULTIMEDIA SOURCES

45
libavfilter/src_movie.c
View File

@ -582,6 +582,49 @@ static int movie_request_frame(AVFilterLink *outlink)
}
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
MovieContext *movie = ctx->priv;
int ret = AVERROR(ENOSYS);
if (!strcmp(cmd, "seek")) {
int idx, flags, i;
int64_t ts;
char tail[2];
if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
return AVERROR(EINVAL);
ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
if (ret < 0)
return ret;
for (i = 0; i < ctx->nb_outputs; i++) {
avcodec_flush_buffers(movie->st[i].codec_ctx);
movie->st[i].done = 0;
}
return ret;
} else if (!strcmp(cmd, "get_duration")) {
int print_len;
char tail[2];
if (!res || res_len <= 0)
return AVERROR(EINVAL);
if (args && sscanf(args, "%1s", tail) == 1)
return AVERROR(EINVAL);
print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
if (print_len < 0 || print_len >= res_len)
return AVERROR(EINVAL);
return 0;
}
return ret;
}
#if CONFIG_MOVIE_FILTER
AVFILTER_DEFINE_CLASS(movie);
@ -598,6 +641,7 @@ AVFilter ff_avsrc_movie = {
.inputs = NULL,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
.process_command = process_command
};
#endif /* CONFIG_MOVIE_FILTER */
@ -619,6 +663,7 @@ AVFilter ff_avsrc_amovie = {
.outputs = NULL,
.priv_class = &amovie_class,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
.process_command = process_command,
};
#endif /* CONFIG_AMOVIE_FILTER */