avfilter/vf_yadif_cuda: CUDA accelerated yadif deinterlacer

This is a cuda implementation of yadif, which gives us a way to
do deinterlacing when using the nvdec hwaccel. In that scenario
we don't have access to the nvidia deinterlacer.

1 files changed, 426 insertions, 0 deletions

diff --git a/libavfilter/vf_yadif_cuda.c b/libavfilter/vf_yadif_cuda.c
new file mode 100644
index 0000000000..be22344d9d
--- /dev/null
+++ b/libavfilter/vf_yadif_cuda.c
@@ -0,0 +1,426 @@
+/*
+ * Copyright (C) 2018 Philip Langdale <philipl@overt.org>
+ *
+ * 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
+ */
+
+#include <cuda.h>
+#include "libavutil/avassert.h"
+#include "libavutil/hwcontext_cuda.h"
+#include "internal.h"
+#include "yadif.h"
+
+extern char vf_yadif_cuda_ptx[];
+
+typedef struct DeintCUDAContext {
+    YADIFContext yadif;
+
+    AVCUDADeviceContext *hwctx;
+    AVBufferRef         *device_ref;
+    AVBufferRef         *input_frames_ref;
+    AVHWFramesContext   *input_frames;
+
+    CUcontext   cu_ctx;
+    CUstream    stream;
+    CUmodule    cu_module;
+    CUfunction  cu_func_uchar;
+    CUfunction  cu_func_uchar2;
+    CUfunction  cu_func_ushort;
+    CUfunction  cu_func_ushort2;
+} DeintCUDAContext;
+
+#define DIV_UP(a, b) ( ((a) + (b) - 1) / (b) )
+#define ALIGN_UP(a, b) (((a) + (b) - 1) & ~((b) - 1))
+#define BLOCKX 32
+#define BLOCKY 16
+
+static int check_cu(AVFilterContext *avctx, CUresult err, const char *func)
+{
+    const char *err_name;
+    const char *err_string;
+
+    av_log(avctx, AV_LOG_TRACE, "Calling %s\n", func);
+
+    if (err == CUDA_SUCCESS)
+        return 0;
+
+    cuGetErrorName(err, &err_name);
+    cuGetErrorString(err, &err_string);
+
+    av_log(avctx, AV_LOG_ERROR, "%s failed", func);
+    if (err_name && err_string)
+        av_log(avctx, AV_LOG_ERROR, " -> %s: %s", err_name, err_string);
+    av_log(avctx, AV_LOG_ERROR, "\n");
+
+    return AVERROR_EXTERNAL;
+}
+
+#define CHECK_CU(x) check_cu(ctx, (x), #x)
+
+static CUresult call_kernel(AVFilterContext *ctx, CUfunction func,
+                            CUdeviceptr prev, CUdeviceptr cur, CUdeviceptr next,
+                            CUarray_format format, int channels,
+                            int src_width,  // Width is pixels per channel
+                            int src_height, // Height is pixels per channel
+                            int src_pitch,  // Pitch is bytes
+                            CUdeviceptr dst,
+                            int dst_width,  // Width is pixels per channel
+                            int dst_height, // Height is pixels per channel
+                            int dst_pitch,  // Pitch is pixels per channel
+                            int parity, int tff)
+{
+    DeintCUDAContext *s = ctx->priv;
+    CUtexObject tex_prev = 0, tex_cur = 0, tex_next = 0;
+    CUresult err;
+    int skip_spatial_check = s->yadif.mode&2;
+
+    void *args[] = { &dst, &tex_prev, &tex_cur, &tex_next,
+                     &dst_width, &dst_height, &dst_pitch,
+                     &src_width, &src_height, &parity, &tff,
+                     &skip_spatial_check };
+
+    CUDA_TEXTURE_DESC tex_desc = {
+        .filterMode = CU_TR_FILTER_MODE_POINT,
+        .flags = CU_TRSF_READ_AS_INTEGER,
+    };
+
+    CUDA_RESOURCE_DESC res_desc = {
+        .resType = CU_RESOURCE_TYPE_PITCH2D,
+        .res.pitch2D.format = format,
+        .res.pitch2D.numChannels = channels,
+        .res.pitch2D.width = src_width,
+        .res.pitch2D.height = src_height,
+        .res.pitch2D.pitchInBytes = src_pitch,
+    };
+
+    res_desc.res.pitch2D.devPtr = (CUdeviceptr)prev;
+    err = CHECK_CU(cuTexObjectCreate(&tex_prev, &res_desc, &tex_desc, NULL));
+    if (err != CUDA_SUCCESS) {
+        goto exit;
+    }
+
+    res_desc.res.pitch2D.devPtr = (CUdeviceptr)cur;
+    err = CHECK_CU(cuTexObjectCreate(&tex_cur, &res_desc, &tex_desc, NULL));
+    if (err != CUDA_SUCCESS) {
+        goto exit;
+    }
+
+    res_desc.res.pitch2D.devPtr = (CUdeviceptr)next;
+    err = CHECK_CU(cuTexObjectCreate(&tex_next, &res_desc, &tex_desc, NULL));
+    if (err != CUDA_SUCCESS) {
+        goto exit;
+    }
+
+    err = CHECK_CU(cuLaunchKernel(func,
+                                  DIV_UP(dst_width, BLOCKX), DIV_UP(dst_height, BLOCKY), 1,
+                                  BLOCKX, BLOCKY, 1,
+                                  0, s->stream, args, NULL));
+
+exit:
+    if (tex_prev)
+        CHECK_CU(cuTexObjectDestroy(tex_prev));
+    if (tex_cur)
+        CHECK_CU(cuTexObjectDestroy(tex_cur));
+    if (tex_next)
+        CHECK_CU(cuTexObjectDestroy(tex_next));
+
+    return err;
+}
+
+static void filter(AVFilterContext *ctx, AVFrame *dst,
+                   int parity, int tff)
+{
+    DeintCUDAContext *s = ctx->priv;
+    YADIFContext *y = &s->yadif;
+    CUcontext dummy;
+    CUresult err;
+    int i;
+
+    err = CHECK_CU(cuCtxPushCurrent(s->cu_ctx));
+    if (err != CUDA_SUCCESS) {
+        goto exit;
+    }
+
+    for (i = 0; i < y->csp->nb_components; i++) {
+        CUfunction func;
+        CUarray_format format;
+        int pixel_size, channels;
+        const AVComponentDescriptor *comp = &y->csp->comp[i];
+
+        if (comp->plane < i) {
+            // We process planes as a whole, so don't reprocess
+            // them for additional components
+            continue;
+        }
+
+        pixel_size = (comp->depth + comp->shift) / 8;
+        channels = comp->step / pixel_size;
+        if (pixel_size > 2 || channels > 2) {
+            av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %s\n", y->csp->name);
+            goto exit;
+        }
+        switch (pixel_size) {
+        case 1:
+            func = channels == 1 ? s->cu_func_uchar : s->cu_func_uchar2;
+            format = CU_AD_FORMAT_UNSIGNED_INT8;
+            break;
+        case 2:
+            func = channels == 1 ? s->cu_func_ushort : s->cu_func_ushort2;
+            format = CU_AD_FORMAT_UNSIGNED_INT16;
+            break;
+        default:
+            av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %s\n", y->csp->name);
+            goto exit;
+        }
+        av_log(ctx, AV_LOG_TRACE,
+               "Deinterlacing plane %d: pixel_size: %d channels: %d\n",
+               comp->plane, pixel_size, channels);
+        call_kernel(ctx, func,
+                    (CUdeviceptr)y->prev->data[i],
+                    (CUdeviceptr)y->cur->data[i],
+                    (CUdeviceptr)y->next->data[i],
+                    format, channels,
+                    AV_CEIL_RSHIFT(y->cur->width, i ? y->csp->log2_chroma_w : 0),
+                    AV_CEIL_RSHIFT(y->cur->height, i ? y->csp->log2_chroma_h : 0),
+                    y->cur->linesize[i],
+                    (CUdeviceptr)dst->data[i],
+                    AV_CEIL_RSHIFT(dst->width, i ? y->csp->log2_chroma_w : 0),
+                    AV_CEIL_RSHIFT(dst->height, i ? y->csp->log2_chroma_h : 0),
+                    dst->linesize[i] / comp->step,
+                    parity, tff);
+    }
+
+    err = CHECK_CU(cuStreamSynchronize(s->stream));
+    if (err != CUDA_SUCCESS) {
+        goto exit;
+    }
+
+exit:
+    CHECK_CU(cuCtxPopCurrent(&dummy));
+    return;
+}
+
+static av_cold void deint_cuda_uninit(AVFilterContext *ctx)
+{
+    CUcontext dummy;
+    DeintCUDAContext *s = ctx->priv;
+    YADIFContext *y = &s->yadif;
+
+    if (s->cu_module) {
+        CHECK_CU(cuCtxPushCurrent(s->cu_ctx));
+        CHECK_CU(cuModuleUnload(s->cu_module));
+        CHECK_CU(cuCtxPopCurrent(&dummy));
+    }
+
+    av_frame_free(&y->prev);
+    av_frame_free(&y->cur);
+    av_frame_free(&y->next);
+
+    av_buffer_unref(&s->device_ref);
+    s->hwctx = NULL;
+    av_buffer_unref(&s->input_frames_ref);
+    s->input_frames = NULL;
+}
+
+static int deint_cuda_query_formats(AVFilterContext *ctx)
+{
+    enum AVPixelFormat pix_fmts[] = {
+        AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,
+    };
+    int ret;
+
+    if ((ret = ff_formats_ref(ff_make_format_list(pix_fmts),
+                              &ctx->inputs[0]->out_formats)) < 0)
+        return ret;
+    if ((ret = ff_formats_ref(ff_make_format_list(pix_fmts),
+                              &ctx->outputs[0]->in_formats)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+    AVFilterContext *ctx = inlink->dst;
+    DeintCUDAContext *s  = ctx->priv;
+
+    if (!inlink->hw_frames_ctx) {
+        av_log(ctx, AV_LOG_ERROR, "A hardware frames reference is "
+               "required to associate the processing device.\n");
+        return AVERROR(EINVAL);
+    }
+
+    s->input_frames_ref = av_buffer_ref(inlink->hw_frames_ctx);
+    if (!s->input_frames_ref) {
+        av_log(ctx, AV_LOG_ERROR, "A input frames reference create "
+               "failed.\n");
+        return AVERROR(ENOMEM);
+    }
+    s->input_frames = (AVHWFramesContext*)s->input_frames_ref->data;
+
+    return 0;
+}
+
+static int config_output(AVFilterLink *link)
+{
+    AVHWFramesContext *output_frames;
+    AVFilterContext *ctx = link->src;
+    DeintCUDAContext *s = ctx->priv;
+    YADIFContext *y = &s->yadif;
+    int ret = 0;
+    CUcontext dummy;
+    CUresult err;
+
+    av_assert0(s->input_frames);
+    s->device_ref = av_buffer_ref(s->input_frames->device_ref);
+    if (!s->device_ref) {
+        av_log(ctx, AV_LOG_ERROR, "A device reference create "
+               "failed.\n");
+        return AVERROR(ENOMEM);
+    }
+    s->hwctx = ((AVHWDeviceContext*)s->device_ref->data)->hwctx;
+    s->cu_ctx = s->hwctx->cuda_ctx;
+    s->stream = s->hwctx->stream;
+
+    link->hw_frames_ctx = av_hwframe_ctx_alloc(s->device_ref);
+    if (!link->hw_frames_ctx) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to create HW frame context "
+               "for output.\n");
+        ret = AVERROR(ENOMEM);
+        goto exit;
+    }
+
+    output_frames = (AVHWFramesContext*)link->hw_frames_ctx->data;
+
+    output_frames->format    = AV_PIX_FMT_CUDA;
+    output_frames->sw_format = s->input_frames->sw_format;
+    output_frames->width     = ctx->inputs[0]->w;
+    output_frames->height    = ctx->inputs[0]->h;
+
+    output_frames->initial_pool_size = 4;
+
+    ret = ff_filter_init_hw_frames(ctx, link, 10);
+    if (ret < 0)
+        goto exit;
+
+    ret = av_hwframe_ctx_init(link->hw_frames_ctx);
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to initialise CUDA frame "
+               "context for output: %d\n", ret);
+        goto exit;
+    }
+
+    link->time_base.num = ctx->inputs[0]->time_base.num;
+    link->time_base.den = ctx->inputs[0]->time_base.den * 2;
+    link->w             = ctx->inputs[0]->w;
+    link->h             = ctx->inputs[0]->h;
+
+    if(y->mode & 1)
+        link->frame_rate = av_mul_q(ctx->inputs[0]->frame_rate,
+                                    (AVRational){2, 1});
+
+    if (link->w < 3 || link->h < 3) {
+        av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
+        ret = AVERROR(EINVAL);
+        goto exit;
+    }
+
+    y->csp = av_pix_fmt_desc_get(output_frames->sw_format);
+    y->filter = filter;
+
+    err = CHECK_CU(cuCtxPushCurrent(s->cu_ctx));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_EXTERNAL;
+        goto exit;
+    }
+
+    err = CHECK_CU(cuModuleLoadData(&s->cu_module, vf_yadif_cuda_ptx));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_INVALIDDATA;
+        goto exit;
+    }
+
+    err = CHECK_CU(cuModuleGetFunction(&s->cu_func_uchar, s->cu_module, "yadif_uchar"));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_INVALIDDATA;
+        goto exit;
+    }
+
+    err = CHECK_CU(cuModuleGetFunction(&s->cu_func_uchar2, s->cu_module, "yadif_uchar2"));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_INVALIDDATA;
+        goto exit;
+    }
+
+    err= CHECK_CU(cuModuleGetFunction(&s->cu_func_ushort, s->cu_module, "yadif_ushort"));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_INVALIDDATA;
+        goto exit;
+    }
+
+    err = CHECK_CU(cuModuleGetFunction(&s->cu_func_ushort2, s->cu_module, "yadif_ushort2"));
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_INVALIDDATA;
+        goto exit;
+    }
+
+exit:
+    CHECK_CU(cuCtxPopCurrent(&dummy));
+
+    return ret;
+}
+
+static const AVClass yadif_cuda_class = {
+    .class_name = "yadif_cuda",
+    .item_name  = av_default_item_name,
+    .option     = ff_yadif_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_FILTER,
+};
+
+static const AVFilterPad deint_cuda_inputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .filter_frame  = ff_yadif_filter_frame,
+        .config_props  = config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad deint_cuda_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .request_frame = ff_yadif_request_frame,
+        .config_props  = config_output,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_yadif_cuda = {
+    .name           = "yadif_cuda",
+    .description    = NULL_IF_CONFIG_SMALL("Deinterlace CUDA frames"),
+    .priv_size      = sizeof(DeintCUDAContext),
+    .priv_class     = &yadif_cuda_class,
+    .uninit         = deint_cuda_uninit,
+    .query_formats  = deint_cuda_query_formats,
+    .inputs         = deint_cuda_inputs,
+    .outputs        = deint_cuda_outputs,
+    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
+    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};