/*
- * copyright (c) 2007 Bobby Bingham
+ * Copyright (c) 2007 Bobby Bingham
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavfilter/vf_format.c
- * video format and noformat filters
+ * @file
+ * format and noformat video filters
*/
+#include <string.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+
#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct FormatContext {
+ const AVClass *class;
+ char *pix_fmts;
-typedef struct {
/**
- * List of flags telling if a given image format has been listed
- * as argument to the filter.
+ * pix_fmts parsed into AVPixelFormats and terminated with
+ * AV_PIX_FMT_NONE
*/
- int listed_pix_fmt_flags[PIX_FMT_NB];
+ enum AVPixelFormat *formats;
} FormatContext;
-#define PIX_FMT_NAME_MAXSIZE 32
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ FormatContext *s = ctx->priv;
+ av_freep(&s->formats);
+}
-static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+static av_cold int init(AVFilterContext *ctx)
{
- 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;
+ FormatContext *s = ctx->priv;
+ char *cur, *sep;
+ int nb_formats = 1;
+ int i;
+
+ if (!s->pix_fmts) {
+ av_log(ctx, AV_LOG_ERROR, "Empty output format string.\n");
+ return AVERROR(EINVAL);
+ }
- /* 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;
- }
+ /* count the formats */
+ cur = s->pix_fmts;
+ while ((cur = strchr(cur, '|'))) {
+ nb_formats++;
+ if (*cur)
+ cur++;
+ }
- 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);
+ s->formats = av_malloc_array(nb_formats + 1, sizeof(*s->formats));
+ if (!s->formats)
+ return AVERROR(ENOMEM);
- if (pix_fmt == PIX_FMT_NONE) {
- av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name);
- return -1;
+ /* parse the list of formats */
+ cur = s->pix_fmts;
+ for (i = 0; i < nb_formats; i++) {
+ sep = strchr(cur, '|');
+ if (sep)
+ *sep++ = 0;
+
+ s->formats[i] = av_get_pix_fmt(cur);
+ if (s->formats[i] == AV_PIX_FMT_NONE) {
+ av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", cur);
+ return AVERROR(EINVAL);
}
- format->listed_pix_fmt_flags[pix_fmt] = 1;
+ cur = sep;
+ }
+ s->formats[nb_formats] = AV_PIX_FMT_NONE;
+
+ if (!strcmp(ctx->filter->name, "noformat")) {
+ const AVPixFmtDescriptor *desc = NULL;
+ enum AVPixelFormat *formats_allowed;
+ int nb_formats_lavu = 0, nb_formats_allowed = 0;;
+
+ /* count the formats known to lavu */
+ while ((desc = av_pix_fmt_desc_next(desc)))
+ nb_formats_lavu++;
+
+ formats_allowed = av_malloc_array(nb_formats_lavu + 1, sizeof(*formats_allowed));
+ if (!formats_allowed)
+ return AVERROR(ENOMEM);
+
+ /* for each format known to lavu, check if it's in the list of
+ * forbidden formats */
+ while ((desc = av_pix_fmt_desc_next(desc))) {
+ enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(desc);
+
+ for (i = 0; i < nb_formats; i++) {
+ if (s->formats[i] == pix_fmt)
+ break;
+ }
+ if (i < nb_formats)
+ continue;
+
+ formats_allowed[nb_formats_allowed++] = pix_fmt;
+ }
+ formats_allowed[nb_formats_allowed] = AV_PIX_FMT_NONE;
+ av_freep(&s->formats);
+ s->formats = formats_allowed;
}
return 0;
}
-static AVFilterFormats *make_format_list(FormatContext *format, int flag)
+static int query_formats(AVFilterContext *ctx)
{
- AVFilterFormats *formats;
- enum PixelFormat pix_fmt;
+ FormatContext *s = ctx->priv;
+ AVFilterFormats *formats = ff_make_format_list(s->formats);
- formats = av_mallocz(sizeof(AVFilterFormats));
- formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
+ if (!formats)
+ return AVERROR(ENOMEM);
- 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));
+ ff_set_common_formats(ctx, formats);
return 0;
}
-static int query_formats_noformat(AVFilterContext *ctx)
-{
- avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 0));
- return 0;
-}
-static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
-{
- avfilter_start_frame(link->dst->outputs[0], picref);
-}
+#define OFFSET(x) offsetof(FormatContext, x)
+static const AVOption options[] = {
+ { "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM },
+ { NULL },
+};
-static void end_frame(AVFilterLink *link)
-{
- avfilter_end_frame(link->dst->outputs[0]);
-}
+#if CONFIG_FORMAT_FILTER
+static const AVClass format_class = {
+ .class_name = "format",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
-static void draw_slice(AVFilterLink *link, int y, int h)
-{
- avfilter_draw_slice(link->dst->outputs[0], y, h);
-}
+static const AVFilterPad avfilter_vf_format_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = ff_null_get_video_buffer,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_format_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO
+ },
+ { NULL }
+};
-AVFilter avfilter_vf_format = {
+AVFilter ff_vf_format = {
.name = "format",
- .description = "Convert the input video to one of the specified pixel formats.",
+ .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
.init = init,
+ .uninit = uninit,
- .query_formats = query_formats_format,
+ .query_formats = query_formats,
.priv_size = sizeof(FormatContext),
+ .priv_class = &format_class,
+
+ .inputs = avfilter_vf_format_inputs,
+ .outputs = avfilter_vf_format_outputs,
+};
+#endif /* CONFIG_FORMAT_FILTER */
+
+#if CONFIG_NOFORMAT_FILTER
+static const AVClass noformat_class = {
+ .class_name = "noformat",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad avfilter_vf_noformat_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = ff_null_get_video_buffer,
+ },
+ { NULL }
+};
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO,
- .start_frame = start_frame,
- .draw_slice = draw_slice,
- .end_frame = end_frame, },
- { .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO },
- { .name = NULL}},
+static const AVFilterPad avfilter_vf_noformat_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO
+ },
+ { NULL }
};
-AVFilter avfilter_vf_noformat = {
+AVFilter ff_vf_noformat = {
.name = "noformat",
- .description = "Force libavfilter not to use any of the specified pixel formats as the input to the next filter.",
+ .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
.init = init,
+ .uninit = uninit,
- .query_formats = query_formats_noformat,
+ .query_formats = query_formats,
.priv_size = sizeof(FormatContext),
+ .priv_class = &noformat_class,
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO,
- .start_frame = start_frame,
- .draw_slice = draw_slice,
- .end_frame = end_frame, },
- { .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO },
- { .name = NULL}},
+ .inputs = avfilter_vf_noformat_inputs,
+ .outputs = avfilter_vf_noformat_outputs,
};
+#endif /* CONFIG_NOFORMAT_FILTER */
projects / ffmpeg / blobdiff