2009-10-27 21:40:43 +00:00
|
|
|
/*
|
|
|
|
* copyright (c) 2007 Bobby Bingham
|
|
|
|
*
|
|
|
|
* This file is part of FFmpeg.
|
|
|
|
*
|
|
|
|
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @file libavfilter/vf_format.c
|
2009-11-03 21:59:41 +00:00
|
|
|
* format and noformat video filters
|
2009-10-27 21:40:43 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include "avfilter.h"
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
/**
|
|
|
|
* List of flags telling if a given image format has been listed
|
|
|
|
* as argument to the filter.
|
|
|
|
*/
|
|
|
|
int listed_pix_fmt_flags[PIX_FMT_NB];
|
|
|
|
} FormatContext;
|
|
|
|
|
|
|
|
#define PIX_FMT_NAME_MAXSIZE 32
|
|
|
|
|
|
|
|
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
|
|
|
|
{
|
|
|
|
FormatContext *format = ctx->priv;
|
|
|
|
const char *cur, *sep;
|
|
|
|
char pix_fmt_name[PIX_FMT_NAME_MAXSIZE];
|
|
|
|
int pix_fmt_name_len;
|
|
|
|
enum PixelFormat pix_fmt;
|
|
|
|
|
|
|
|
/* parse the list of formats */
|
|
|
|
for (cur = args; cur; cur = sep ? sep+1 : NULL) {
|
|
|
|
if (!(sep = strchr(cur, ':')))
|
|
|
|
pix_fmt_name_len = strlen(cur);
|
|
|
|
else
|
|
|
|
pix_fmt_name_len = sep - cur;
|
|
|
|
if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(pix_fmt_name, cur, pix_fmt_name_len);
|
|
|
|
pix_fmt_name[pix_fmt_name_len] = 0;
|
|
|
|
pix_fmt = avcodec_get_pix_fmt(pix_fmt_name);
|
|
|
|
|
|
|
|
if (pix_fmt == PIX_FMT_NONE) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
format->listed_pix_fmt_flags[pix_fmt] = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static AVFilterFormats *make_format_list(FormatContext *format, int flag)
|
|
|
|
{
|
|
|
|
AVFilterFormats *formats;
|
|
|
|
enum PixelFormat pix_fmt;
|
|
|
|
|
|
|
|
formats = av_mallocz(sizeof(AVFilterFormats));
|
|
|
|
formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
|
|
|
|
|
|
|
|
for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
|
|
|
|
if (format->listed_pix_fmt_flags[pix_fmt] == flag)
|
|
|
|
formats->formats[formats->format_count++] = pix_fmt;
|
|
|
|
|
|
|
|
return formats;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int query_formats_format(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 1));
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int query_formats_noformat(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 0));
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-11-03 22:04:55 +00:00
|
|
|
static AVFilterPicRef *get_video_buffer(AVFilterLink *link, int perms,
|
|
|
|
int w, int h)
|
|
|
|
{
|
|
|
|
return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
|
|
|
|
}
|
|
|
|
|
2009-10-27 21:40:43 +00:00
|
|
|
static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
|
|
|
|
{
|
|
|
|
avfilter_start_frame(link->dst->outputs[0], picref);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void end_frame(AVFilterLink *link)
|
|
|
|
{
|
|
|
|
avfilter_end_frame(link->dst->outputs[0]);
|
|
|
|
}
|
|
|
|
|
2009-12-04 23:26:13 +00:00
|
|
|
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
|
2009-10-27 21:40:43 +00:00
|
|
|
{
|
2009-12-04 23:26:13 +00:00
|
|
|
avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
|
2009-10-27 21:40:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
AVFilter avfilter_vf_format = {
|
|
|
|
.name = "format",
|
|
|
|
.description = "Convert the input video to one of the specified pixel formats.",
|
|
|
|
|
|
|
|
.init = init,
|
|
|
|
|
|
|
|
.query_formats = query_formats_format,
|
|
|
|
|
|
|
|
.priv_size = sizeof(FormatContext),
|
|
|
|
|
|
|
|
.inputs = (AVFilterPad[]) {{ .name = "default",
|
|
|
|
.type = CODEC_TYPE_VIDEO,
|
2009-11-03 22:04:55 +00:00
|
|
|
.get_video_buffer= get_video_buffer,
|
2009-10-27 21:40:43 +00:00
|
|
|
.start_frame = start_frame,
|
|
|
|
.draw_slice = draw_slice,
|
|
|
|
.end_frame = end_frame, },
|
|
|
|
{ .name = NULL}},
|
|
|
|
.outputs = (AVFilterPad[]) {{ .name = "default",
|
|
|
|
.type = CODEC_TYPE_VIDEO },
|
|
|
|
{ .name = NULL}},
|
|
|
|
};
|
|
|
|
|
|
|
|
AVFilter avfilter_vf_noformat = {
|
|
|
|
.name = "noformat",
|
2009-11-03 21:57:21 +00:00
|
|
|
.description = "Force libavfilter not to use any of the specified pixel formats for the input to the next filter.",
|
2009-10-27 21:40:43 +00:00
|
|
|
|
|
|
|
.init = init,
|
|
|
|
|
|
|
|
.query_formats = query_formats_noformat,
|
|
|
|
|
|
|
|
.priv_size = sizeof(FormatContext),
|
|
|
|
|
|
|
|
.inputs = (AVFilterPad[]) {{ .name = "default",
|
|
|
|
.type = CODEC_TYPE_VIDEO,
|
2009-11-03 22:04:55 +00:00
|
|
|
.get_video_buffer= get_video_buffer,
|
2009-10-27 21:40:43 +00:00
|
|
|
.start_frame = start_frame,
|
|
|
|
.draw_slice = draw_slice,
|
|
|
|
.end_frame = end_frame, },
|
|
|
|
{ .name = NULL}},
|
|
|
|
.outputs = (AVFilterPad[]) {{ .name = "default",
|
|
|
|
.type = CODEC_TYPE_VIDEO },
|
|
|
|
{ .name = NULL}},
|
|
|
|
};
|