/*
* 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
* scale video filter
*/
#include <nppi.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_cuda_internal.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "scale.h"
#include "video.h"
static const enum AVPixelFormat supported_formats[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NV12,
AV_PIX_FMT_YUV444P,
};
static const enum AVPixelFormat deinterleaved_formats[][2] = {
{ AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P },
};
enum ScaleStage {
STAGE_DEINTERLEAVE,
STAGE_RESIZE,
STAGE_INTERLEAVE,
STAGE_NB,
};
typedef struct NPPScaleStageContext {
int stage_needed;
enum AVPixelFormat in_fmt;
enum AVPixelFormat out_fmt;
struct {
int width;
int height;
} planes_in[3], planes_out[3];
AVBufferRef *frames_ctx;
AVFrame *frame;
} NPPScaleStageContext;
typedef struct NPPScaleContext {
const AVClass *class;
NPPScaleStageContext stages[STAGE_NB];
AVFrame *tmp_frame;
int passthrough;
int shift_width, shift_height;
/**
* New dimensions. Special values are:
* 0 = original width/height
* -1 = keep original aspect
*/
int w, h;
/**
* Output sw format. AV_PIX_FMT_NONE for no conversion.
*/
enum AVPixelFormat format;
char *w_expr; ///< width expression string
char *h_expr; ///< height expression string
char *format_str;
int interp_algo;
} NPPScaleContext;
static int nppscale_init(AVFilterContext *ctx)
{
NPPScaleContext *s = ctx->priv;
int i;
if (!strcmp(s->format_str, "same")) {
s->format = AV_PIX_FMT_NONE;
} else {
s->format = av_get_pix_fmt(s->format_str);
if (s->format == AV_PIX_FMT_NONE) {
av_log(ctx, AV_LOG_ERROR, "Unrecognized pixel format: %s\n", s->format_str);
return AVERROR(EINVAL);
}
}
for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
s->stages[i].frame = av_frame_alloc();
if (!s->stages[i].frame)
return AVERROR(ENOMEM);
}
s->tmp_frame = av_frame_alloc();
if (!s->tmp_frame)
return AVERROR(ENOMEM);
return 0;
}
static void nppscale_uninit(AVFilterContext *ctx)
{
NPPScaleContext *s = ctx->priv;
int i;
for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
av_frame_free(&s->stages[i].frame);
av_buffer_unref(&s->stages[i].frames_ctx);
}
av_frame_free(&s->tmp_frame);
}
static int nppscale_query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pixel_formats[] = {
AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,
};
AVFilterFormats *pix_fmts = ff_make_format_list(pixel_formats);
return ff_set_common_formats(ctx, pix_fmts);
}
static int init_stage(NPPScaleStageContext *stage, AVBufferRef *device_ctx)
{
AVBufferRef *out_ref = NULL;
AVHWFramesContext *out_ctx;
int in_sw, in_sh, out_sw, out_sh;
int ret, i;
av_pix_fmt_get_chroma_sub_sample(stage->in_fmt, &in_sw, &in_sh);
av_pix_fmt_get_chroma_sub_sample(stage->out_fmt, &out_sw, &out_sh);
if (!stage->planes_out[0].width) {
stage->planes_out[0].width = stage->planes_in[0].width;
stage->planes_out[0].height = stage->planes_in[0].height;
}
for (i = 1; i < FF_ARRAY_ELEMS(stage->planes_in); i++) {
stage->planes_in[i].width = stage->planes_in[0].width >> in_sw;
stage->planes_in[i].height = stage->planes_in[0].height >> in_sh;
stage->planes_out[i].width = stage->planes_out[0].width >> out_sw;
stage->planes_out[i].height = stage->planes_out[0].height >> out_sh;
}
out_ref = av_hwframe_ctx_alloc(device_ctx);
if (!out_ref)
return AVERROR(ENOMEM);
out_ctx = (AVHWFramesContext*)out_ref->data;
out_ctx->format = AV_PIX_FMT_CUDA;
out_ctx->sw_format = stage->out_fmt;
out_ctx->width = FFALIGN(stage->planes_out[0].width, 32);
out_ctx->height = FFALIGN(stage->planes_out[0].height, 32);
ret = av_hwframe_ctx_init(out_ref);
if (ret < 0)
goto fail;
av_frame_unref(stage->frame);
ret = av_hwframe_get_buffer(out_ref, stage->frame, 0);
if (ret < 0)
goto fail;
stage->frame->width = stage->planes_out[0].width;
stage->frame->height = stage->planes_out[0].height;
av_buffer_unref(&stage->frames_ctx);
stage->frames_ctx = out_ref;
return 0;
fail:
av_buffer_unref(&out_ref);
return ret;
}
static int format_is_supported(enum AVPixelFormat fmt)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
if (supported_formats[i] == fmt)
return 1;
return 0;
}
static enum AVPixelFormat get_deinterleaved_format(enum AVPixelFormat fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
int i, planes;
planes = av_pix_fmt_count_planes(fmt);
if (planes == desc->nb_components)
return fmt;
for (i = 0; i < FF_ARRAY_ELEMS(deinterleaved_formats); i++)
if (deinterleaved_formats[i][0] == fmt)
return deinterleaved_formats[i][1];
return AV_PIX_FMT_NONE;
}
static int init_processing_chain(AVFilterContext *ctx, int in_width, int in_height,
int out_width, int out_height)
{
NPPScaleContext *s = ctx->priv;
AVHWFramesContext *in_frames_ctx;
enum AVPixelFormat in_format;
enum AVPixelFormat out_format;
enum AVPixelFormat in_deinterleaved_format;
enum AVPixelFormat out_deinterleaved_format;
int i, ret, last_stage = -1;
/* check that we have a hw context */
if (!ctx->inputs[0]->hw_frames_ctx) {
av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n");
return AVERROR(EINVAL);
}
in_frames_ctx = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;
in_format = in_frames_ctx->sw_format;
out_format = (s->format == AV_PIX_FMT_NONE) ? in_format : s->format;
if (!format_is_supported(in_format)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n",
av_get_pix_fmt_name(in_format));
return AVERROR(ENOSYS);
}
if (!format_is_supported(out_format)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported output format: %s\n",
av_get_pix_fmt_name(out_format));
return AVERROR(ENOSYS);
}
in_deinterleaved_format = get_deinterleaved_format(in_format);
out_deinterleaved_format = get_deinterleaved_format(out_format);
if (in_deinterleaved_format == AV_PIX_FMT_NONE ||
out_deinterleaved_format == AV_PIX_FMT_NONE)
return AVERROR_BUG;
/* figure out which stages need to be done */
if (in_width != out_width || in_height != out_height ||
in_deinterleaved_format != out_deinterleaved_format) {
s->stages[STAGE_RESIZE].stage_needed = 1;
if (s->interp_algo == NPPI_INTER_SUPER &&
(out_width > in_width && out_height > in_height)) {
s->interp_algo = NPPI_INTER_LANCZOS;
av_log(ctx, AV_LOG_WARNING, "super-sampling not supported for output dimensions, using lanczos instead.\n");
}
if (s->interp_algo == NPPI_INTER_SUPER &&
!(out_width < in_width && out_height < in_height)) {
s->interp_algo = NPPI_INTER_CUBIC;
av_log(ctx, AV_LOG_WARNING, "super-sampling not supported for output dimensions, using cubic instead.\n");
}
}
if (!s->stages[STAGE_RESIZE].stage_needed && in_format == out_format)
s->passthrough = 1;
if (!s->passthrough) {
if (in_format != in_deinterleaved_format)
s->stages[STAGE_DEINTERLEAVE].stage_needed = 1;
if (out_format != out_deinterleaved_format)
s->stages[STAGE_INTERLEAVE].stage_needed = 1;
}
s->stages[STAGE_DEINTERLEAVE].in_fmt = in_format;
s->stages[STAGE_DEINTERLEAVE].out_fmt = in_deinterleaved_format;
s->stages[STAGE_DEINTERLEAVE].planes_in[0].width = in_width;
s->stages[STAGE_DEINTERLEAVE].planes_in[0].height = in_height;
s->stages[STAGE_RESIZE].in_fmt = in_deinterleaved_format;
s->stages[STAGE_RESIZE].out_fmt = out_deinterleaved_format;
s->stages[STAGE_RESIZE].planes_in[0].width = in_width;
s->stages[STAGE_RESIZE].planes_in[0].height = in_height;
s->stages[STAGE_RESIZE].planes_out[0].width = out_width;
s->stages[STAGE_RESIZE].planes_out[0].height = out_height;
s->stages[STAGE_INTERLEAVE].in_fmt = out_deinterleaved_format;
s->stages[STAGE_INTERLEAVE].out_fmt = out_format;
s->stages[STAGE_INTERLEAVE].planes_in[0].width = out_width;
s->stages[STAGE_INTERLEAVE].planes_in[0].height = out_height;
/* init the hardware contexts */
for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
if (!s->stages[i].stage_needed)
continue;
ret = init_stage(&s->stages[i], in_frames_ctx->device_ref);
if (ret < 0)
return ret;
last_stage = i;
}
if (last_stage >= 0)
ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->stages[last_stage].frames_ctx);
else
ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(ctx->inputs[0]->hw_frames_ctx);
if (!ctx->outputs[0]->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
static int nppscale_config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = outlink->src->inputs[0];
NPPScaleContext *s = ctx->priv;
int w, h;
int ret;
if ((ret = ff_scale_eval_dimensions(s,
s->w_expr, s->h_expr,
inlink, outlink,
&w, &h)) < 0)
goto fail;
if (((int64_t)h * inlink->w) > INT_MAX ||
((int64_t)w * inlink->h) > INT_MAX)
av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
outlink->w = w;
outlink->h = h;
ret = init_processing_chain(ctx, inlink->w, inlink->h, w, h);
if (ret < 0)
return ret;
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d\n",
inlink->w, inlink->h, outlink->w, outlink->h);
if (inlink->sample_aspect_ratio.num)
outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w,
outlink->w*inlink->h},
inlink->sample_aspect_ratio);
else
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
return 0;
fail:
return ret;
}
static int nppscale_deinterleave(AVFilterContext *ctx, NPPScaleStageContext *stage,
AVFrame *out, AVFrame *in)
{
AVHWFramesContext *in_frames_ctx = (AVHWFramesContext*)in->hw_frames_ctx->data;
NppStatus err;
switch (in_frames_ctx->sw_format) {
case AV_PIX_FMT_NV12:
err = nppiYCbCr420_8u_P2P3R(in->data[0], in->linesize[0],
in->data[1], in->linesize[1],
out->data, out->linesize,
(NppiSize){ in->width, in->height });
break;
default:
return AVERROR_BUG;
}
if (err != NPP_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
return AVERROR_UNKNOWN;
}
return 0;
}
static int nppscale_resize(AVFilterContext *ctx, NPPScaleStageContext *stage,
AVFrame *out, AVFrame *in)
{
NPPScaleContext *s = ctx->priv;
NppStatus err;
int i;
for (i = 0; i < FF_ARRAY_ELEMS(stage->planes_in) && i < FF_ARRAY_ELEMS(in->data) && in->data[i]; i++) {
int iw = stage->planes_in[i].width;
int ih = stage->planes_in[i].height;
int ow = stage->planes_out[i].width;
int oh = stage->planes_out[i].height;
err = nppiResizeSqrPixel_8u_C1R(in->data[i], (NppiSize){ iw, ih },
in->linesize[i], (NppiRect){ 0, 0, iw, ih },
out->data[i], out->linesize[i],
(NppiRect){ 0, 0, ow, oh },
(double)ow / iw, (double)oh / ih,
0.0, 0.0, s->interp_algo);
if (err != NPP_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "NPP resize error: %d\n", err);
return AVERROR_UNKNOWN;
}
}
return 0;
}
static int nppscale_interleave(AVFilterContext *ctx, NPPScaleStageContext *stage,
AVFrame *out, AVFrame *in)
{
AVHWFramesContext *out_frames_ctx = (AVHWFramesContext*)out->hw_frames_ctx->data;
NppStatus err;
switch (out_frames_ctx->sw_format) {
case AV_PIX_FMT_NV12:
err = nppiYCbCr420_8u_P3P2R((const uint8_t**)in->data,
in->linesize,
out->data[0], out->linesize[0],
out->data[1], out->linesize[1],
(NppiSize){ in->width, in->height });
break;
default:
return AVERROR_BUG;
}
if (err != NPP_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
return AVERROR_UNKNOWN;
}
return 0;
}
static int (*const nppscale_process[])(AVFilterContext *ctx, NPPScaleStageContext *stage,
AVFrame *out, AVFrame *in) = {
[STAGE_DEINTERLEAVE] = nppscale_deinterleave,
[STAGE_RESIZE] = nppscale_resize,
[STAGE_INTERLEAVE] = nppscale_interleave,
};
static int nppscale_scale(AVFilterContext *ctx, AVFrame *out, AVFrame *in)
{
NPPScaleContext *s = ctx->priv;
AVFrame *src = in;
int i, ret, last_stage = -1;
for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
if (!s->stages[i].stage_needed)
continue;
ret = nppscale_process[i](ctx, &s->stages[i], s->stages[i].frame, src);
if (ret < 0)
return ret;
src = s->stages[i].frame;
last_stage = i;
}
if (last_stage < 0)
return AVERROR_BUG;
ret = av_hwframe_get_buffer(src->hw_frames_ctx, s->tmp_frame, 0);
if (ret < 0)
return ret;
av_frame_move_ref(out, src);
av_frame_move_ref(src, s->tmp_frame);
ret = av_frame_copy_props(out, in);
if (ret < 0)
return ret;
return 0;
}
static int nppscale_filter_frame(AVFilterLink *link, AVFrame *in)
{
AVFilterContext *ctx = link->dst;
NPPScaleContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)outlink->hw_frames_ctx->data;
AVCUDADeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx;
AVFrame *out = NULL;
CUresult err;
CUcontext dummy;
int ret = 0;
if (s->passthrough)
return ff_filter_frame(outlink, in);
out = av_frame_alloc();
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}
err = device_hwctx->internal->cuda_dl->cuCtxPushCurrent(device_hwctx->cuda_ctx);
if (err != CUDA_SUCCESS) {
ret = AVERROR_UNKNOWN;
goto fail;
}
ret = nppscale_scale(ctx, out, in);
device_hwctx->internal->cuda_dl->cuCtxPopCurrent(&dummy);
if (ret < 0)
goto fail;
av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
(int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
(int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
INT_MAX);
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
av_frame_free(&out);
return ret;
}
#define OFFSET(x) offsetof(NPPScaleContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption options[] = {
{ "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str = "iw" }, .flags = FLAGS },
{ "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str = "ih" }, .flags = FLAGS },
{ "format", "Output pixel format", OFFSET(format_str), AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },
{ "interp_algo", "Interpolation algorithm used for resizing", OFFSET(interp_algo), AV_OPT_TYPE_INT, { .i64 = NPPI_INTER_CUBIC }, 0, INT_MAX, FLAGS, "interp_algo" },
{ "nn", "nearest neighbour", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_NN }, 0, 0, FLAGS, "interp_algo" },
{ "linear", "linear", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_LINEAR }, 0, 0, FLAGS, "interp_algo" },
{ "cubic", "cubic", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC }, 0, 0, FLAGS, "interp_algo" },
{ "cubic2p_bspline", "2-parameter cubic (B=1, C=0)", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_BSPLINE }, 0, 0, FLAGS, "interp_algo" },
{ "cubic2p_catmullrom", "2-parameter cubic (B=0, C=1/2)", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_CATMULLROM }, 0, 0, FLAGS, "interp_algo" },
{ "cubic2p_b05c03", "2-parameter cubic (B=1/2, C=3/10)", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_B05C03 }, 0, 0, FLAGS, "interp_algo" },
{ "super", "supersampling", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_SUPER }, 0, 0, FLAGS, "interp_algo" },
{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_LANCZOS }, 0, 0, FLAGS, "interp_algo" },
{ NULL },
};
static const AVClass nppscale_class = {
.class_name = "nppscale",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad nppscale_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = nppscale_filter_frame,
},
{ NULL }
};
static const AVFilterPad nppscale_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = nppscale_config_props,
},
{ NULL }
};
AVFilter ff_vf_scale_npp = {
.name = "scale_npp",
.description = NULL_IF_CONFIG_SMALL("NVIDIA Performance Primitives video "
"scaling and format conversion"),
.init = nppscale_init,
.uninit = nppscale_uninit,
.query_formats = nppscale_query_formats,
.priv_size = sizeof(NPPScaleContext),
.priv_class = &nppscale_class,
.inputs = nppscale_inputs,
.outputs = nppscale_outputs,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};