* video field order filter, heavily influenced by vf_pad.c
*/
-/* #define DEBUG */
+#include <stdio.h>
+#include <string.h>
#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
-typedef struct
-{
- unsigned int dst_tff; ///< output bff/tff
+typedef struct FieldOrderContext {
+ const AVClass *class;
+ int dst_tff; ///< output bff/tff
int line_size[4]; ///< bytes of pixel data per line for each plane
} FieldOrderContext;
-static av_cold int init(AVFilterContext *ctx, const char *args)
-{
- FieldOrderContext *fieldorder = ctx->priv;
-
- const char *tff = "tff";
- const char *bff = "bff";
-
- if (!args) {
- fieldorder->dst_tff = 1;
- } else if (sscanf(args, "%u", &fieldorder->dst_tff) == 1) {
- fieldorder->dst_tff = !!fieldorder->dst_tff;
- } else if (!strcmp(tff, args)) {
- fieldorder->dst_tff = 1;
- } else if (!strcmp(bff, args)) {
- fieldorder->dst_tff = 0;
- } else {
- av_log(ctx, AV_LOG_ERROR, "Invalid argument '%s'.\n", args);
- return AVERROR(EINVAL);
- }
-
- av_log(ctx, AV_LOG_VERBOSE, "output field order: %s\n",
- fieldorder->dst_tff ? tff : bff);
-
- return 0;
-}
-
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats;
- enum PixelFormat pix_fmt;
+ enum AVPixelFormat pix_fmt;
int ret;
/** accept any input pixel format that is not hardware accelerated, not
* a bitstream format, and does not have vertically sub-sampled chroma */
if (ctx->inputs[0]) {
+ const AVPixFmtDescriptor *desc = NULL;
formats = NULL;
- for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
- if (!( av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL
- || av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_BITSTREAM)
- && av_pix_fmt_descriptors[pix_fmt].nb_components
- && !av_pix_fmt_descriptors[pix_fmt].log2_chroma_h
- && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
+ while ((desc = av_pix_fmt_desc_next(desc))) {
+ pix_fmt = av_pix_fmt_desc_get_id(desc);
+ if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
+ desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
+ desc->nb_components && !desc->log2_chroma_h &&
+ (ret = ff_add_format(&formats, pix_fmt)) < 0) {
ff_formats_unref(&formats);
return ret;
}
+ }
ff_formats_ref(formats, &ctx->inputs[0]->out_formats);
ff_formats_ref(formats, &ctx->outputs[0]->in_formats);
}
static int config_input(AVFilterLink *inlink)
{
- AVFilterContext *ctx = inlink->dst;
- FieldOrderContext *fieldorder = ctx->priv;
+ AVFilterContext *ctx = inlink->dst;
+ FieldOrderContext *s = ctx->priv;
int plane;
/** full an array with the number of bytes that the video
* data occupies per line for each plane of the input video */
for (plane = 0; plane < 4; plane++) {
- fieldorder->line_size[plane] = av_image_get_linesize(
- inlink->format,
- inlink->w,
- plane);
+ s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w,
+ plane);
}
return 0;
}
-static AVFilterBufferRef *get_video_buffer(AVFilterLink *inlink, int perms, int w, int h)
-{
- AVFilterContext *ctx = inlink->dst;
- AVFilterLink *outlink = ctx->outputs[0];
-
- return ff_get_video_buffer(outlink, perms, w, h);
-}
-
-static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
-{
- AVFilterContext *ctx = inlink->dst;
- AVFilterLink *outlink = ctx->outputs[0];
-
- AVFilterBufferRef *outpicref, *for_next_filter;
-
- outpicref = avfilter_ref_buffer(inpicref, ~0);
- outlink->out_buf = outpicref;
-
- for_next_filter = avfilter_ref_buffer(outpicref, ~0);
- ff_start_frame(outlink, for_next_filter);
-}
-
-static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
- AVFilterContext *ctx = inlink->dst;
- FieldOrderContext *fieldorder = ctx->priv;
- AVFilterLink *outlink = ctx->outputs[0];
-
- AVFilterBufferRef *inpicref = inlink->cur_buf;
-
- /** can only currently do slices if this filter is doing nothing
- * because this filter is moving picture content, the output
- * slice will contain different video lines than the input slice
- * and that complexity will be added later */
- if ( !inpicref->video->interlaced
- || inpicref->video->top_field_first == fieldorder->dst_tff) {
- ff_draw_slice(outlink, y, h, slice_dir);
+ AVFilterContext *ctx = inlink->dst;
+ FieldOrderContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ int h, plane, line_step, line_size, line;
+ uint8_t *data;
+
+ if (!frame->interlaced_frame ||
+ frame->top_field_first == s->dst_tff) {
+ av_log(ctx, AV_LOG_VERBOSE,
+ "Skipping %s.\n",
+ frame->interlaced_frame ?
+ "frame with same field order" : "progressive frame");
+ return ff_filter_frame(outlink, frame);
}
-}
-static void end_frame(AVFilterLink *inlink)
-{
- AVFilterContext *ctx = inlink->dst;
- FieldOrderContext *fieldorder = ctx->priv;
- AVFilterLink *outlink = ctx->outputs[0];
-
- AVFilterBufferRef *inpicref = inlink->cur_buf;
- AVFilterBufferRef *outpicref = outlink->out_buf;
-
- int h, plane, line_step, line_size, line;
- uint8_t *cpy_src, *cpy_dst;
-
- if ( inpicref->video->interlaced
- && inpicref->video->top_field_first != fieldorder->dst_tff) {
- av_dlog(ctx,
- "picture will move %s one line\n",
- fieldorder->dst_tff ? "up" : "down");
- h = inpicref->video->h;
- for (plane = 0; plane < 4 && inpicref->data[plane]; plane++) {
- line_step = inpicref->linesize[plane];
- line_size = fieldorder->line_size[plane];
- cpy_src = inpicref->data[plane];
- cpy_dst = outpicref->data[plane];
- if (fieldorder->dst_tff) {
- /** Move every line up one line, working from
- * the top to the bottom of the frame.
- * The original top line is lost.
- * The new last line is created as a copy of the
- * penultimate line from that field. */
- for (line = 0; line < h; line++) {
- if (1 + line < outpicref->video->h) {
- memcpy(cpy_dst, cpy_src + line_step, line_size);
- } else {
- memcpy(cpy_dst, cpy_src - line_step - line_step, line_size);
- }
- cpy_src += line_step;
- cpy_dst += line_step;
+ av_log(ctx, AV_LOG_TRACE,
+ "picture will move %s one line\n",
+ s->dst_tff ? "up" : "down");
+ h = frame->height;
+ for (plane = 0; plane < 4 && frame->data[plane]; plane++) {
+ line_step = frame->linesize[plane];
+ line_size = s->line_size[plane];
+ data = frame->data[plane];
+ if (s->dst_tff) {
+ /** Move every line up one line, working from
+ * the top to the bottom of the frame.
+ * The original top line is lost.
+ * The new last line is created as a copy of the
+ * penultimate line from that field. */
+ for (line = 0; line < h; line++) {
+ if (1 + line < frame->height) {
+ memcpy(data, data + line_step, line_size);
+ } else {
+ memcpy(data, data - line_step - line_step, line_size);
}
- } else {
- /** Move every line down one line, working from
- * the bottom to the top of the frame.
- * The original bottom line is lost.
- * The new first line is created as a copy of the
- * second line from that field. */
- cpy_src += (h - 1) * line_step;
- cpy_dst += (h - 1) * line_step;
- for (line = h - 1; line >= 0 ; line--) {
- if (line > 0) {
- memcpy(cpy_dst, cpy_src - line_step, line_size);
- } else {
- memcpy(cpy_dst, cpy_src + line_step + line_step, line_size);
- }
- cpy_src -= line_step;
- cpy_dst -= line_step;
+ data += line_step;
+ }
+ } else {
+ /** Move every line down one line, working from
+ * the bottom to the top of the frame.
+ * The original bottom line is lost.
+ * The new first line is created as a copy of the
+ * second line from that field. */
+ data += (h - 1) * line_step;
+ for (line = h - 1; line >= 0 ; line--) {
+ if (line > 0) {
+ memcpy(data, data - line_step, line_size);
+ } else {
+ memcpy(data, data + line_step + line_step, line_size);
}
+ data -= line_step;
}
}
- outpicref->video->top_field_first = fieldorder->dst_tff;
- ff_draw_slice(outlink, 0, h, 1);
- } else {
- av_dlog(ctx,
- "not interlaced or field order already correct\n");
}
+ frame->top_field_first = s->dst_tff;
- ff_end_frame(outlink);
+ return ff_filter_frame(outlink, frame);
}
-AVFilter avfilter_vf_fieldorder = {
+#define OFFSET(x) offsetof(FieldOrderContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption options[] = {
+ { "order", "output field order", OFFSET(dst_tff), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "order" },
+ { "bff", "bottom field first", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .unit = "order" },
+ { "tff", "top field first", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .unit = "order" },
+ { NULL },
+};
+
+static const AVClass fieldorder_class = {
+ .class_name = "fieldorder",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad avfilter_vf_fieldorder_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ .needs_writable = 1,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_fieldorder_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_fieldorder = {
.name = "fieldorder",
.description = NULL_IF_CONFIG_SMALL("Set the field order."),
- .init = init,
.priv_size = sizeof(FieldOrderContext),
+ .priv_class = &fieldorder_class,
.query_formats = query_formats,
- .inputs = (const AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .config_props = config_input,
- .start_frame = start_frame,
- .get_video_buffer = get_video_buffer,
- .draw_slice = draw_slice,
- .end_frame = end_frame,
- .min_perms = AV_PERM_READ,
- .rej_perms = AV_PERM_REUSE2|AV_PERM_PRESERVE,},
- { .name = NULL}},
- .outputs = (const AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO, },
- { .name = NULL}},
+ .inputs = avfilter_vf_fieldorder_inputs,
+ .outputs = avfilter_vf_fieldorder_outputs,
};
projects / ffmpeg / blobdiff