avfilter: add vf_overlay_cuda

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

1 files changed, 438 insertions, 0 deletions

diff --git a/libavfilter/vf_overlay_cuda.c b/libavfilter/vf_overlay_cuda.c
new file mode 100644
index 0000000000..2f0f860e50
--- /dev/null
+++ b/libavfilter/vf_overlay_cuda.c
@@ -0,0 +1,438 @@
+/*
+ * Copyright (c) 2020 Yaroslav Pogrebnyak <yyyaroslav@gmail.com>
+ *
+ * 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
+ * Overlay one video on top of another using cuda hardware acceleration
+ */
+
+#include "libavutil/log.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_cuda_internal.h"
+#include "libavutil/cuda_check.h"
+
+#include "avfilter.h"
+#include "framesync.h"
+#include "internal.h"
+
+#define CHECK_CU(x) FF_CUDA_CHECK_DL(ctx, ctx->hwctx->internal->cuda_dl, x)
+#define DIV_UP(a, b) ( ((a) + (b) - 1) / (b) )
+
+#define BLOCK_X 32
+#define BLOCK_Y 16
+
+static const enum AVPixelFormat supported_main_formats[] = {
+    AV_PIX_FMT_NV12,
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_NONE,
+};
+
+static const enum AVPixelFormat supported_overlay_formats[] = {
+    AV_PIX_FMT_NV12,
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_YUVA420P,
+    AV_PIX_FMT_NONE,
+};
+
+/**
+ * OverlayCUDAContext
+ */
+typedef struct OverlayCUDAContext {
+    const AVClass      *class;
+
+    enum AVPixelFormat in_format_overlay;
+    enum AVPixelFormat in_format_main;
+
+    AVCUDADeviceContext *hwctx;
+
+    CUcontext cu_ctx;
+    CUmodule cu_module;
+    CUfunction cu_func;
+    CUstream cu_stream;
+
+    FFFrameSync fs;
+
+    int x_position;
+    int y_position;
+
+} OverlayCUDAContext;
+
+/**
+ * Helper to find out if provided format is supported by filter
+ */
+static int format_is_supported(const enum AVPixelFormat formats[], enum AVPixelFormat fmt)
+{
+    for (int i = 0; formats[i] != AV_PIX_FMT_NONE; i++)
+        if (formats[i] == fmt)
+            return 1;
+    return 0;
+}
+
+/**
+ * Helper checks if we can process main and overlay pixel formats
+ */
+static int formats_match(const enum AVPixelFormat format_main, const enum AVPixelFormat format_overlay) {
+    switch(format_main) {
+    case AV_PIX_FMT_NV12:
+        return format_overlay == AV_PIX_FMT_NV12;
+    case AV_PIX_FMT_YUV420P:
+        return format_overlay == AV_PIX_FMT_YUV420P ||
+               format_overlay == AV_PIX_FMT_YUVA420P;
+    default:
+        return 0;
+    }
+}
+
+/**
+ * Call overlay kernell for a plane
+ */
+static int overlay_cuda_call_kernel(
+    OverlayCUDAContext *ctx,
+    int x_position, int y_position,
+    uint8_t* main_data, int main_linesize,
+    int main_width, int main_height,
+    uint8_t* overlay_data, int overlay_linesize,
+    int overlay_width, int overlay_height,
+    uint8_t* alpha_data, int alpha_linesize,
+    int alpha_adj_x, int alpha_adj_y) {
+
+    CudaFunctions *cu = ctx->hwctx->internal->cuda_dl;
+
+    void* kernel_args[] = {
+        &x_position, &y_position,
+        &main_data, &main_linesize,
+        &overlay_data, &overlay_linesize,
+        &overlay_width, &overlay_height,
+        &alpha_data, &alpha_linesize,
+        &alpha_adj_x, &alpha_adj_y,
+    };
+
+    return CHECK_CU(cu->cuLaunchKernel(
+        ctx->cu_func,
+        DIV_UP(main_width, BLOCK_X), DIV_UP(main_height, BLOCK_Y), 1,
+        BLOCK_X, BLOCK_Y, 1,
+        0, ctx->cu_stream, kernel_args, NULL));
+}
+
+/**
+ * Perform blend overlay picture over main picture
+ */
+static int overlay_cuda_blend(FFFrameSync *fs)
+{
+    int ret;
+
+    AVFilterContext *avctx = fs->parent;
+    OverlayCUDAContext *ctx = avctx->priv;
+    AVFilterLink *outlink = avctx->outputs[0];
+
+    CudaFunctions *cu = ctx->hwctx->internal->cuda_dl;
+    CUcontext dummy, cuda_ctx = ctx->hwctx->cuda_ctx;
+
+    AVFrame *input_main, *input_overlay;
+
+    ctx->cu_ctx = cuda_ctx;
+
+    // read main and overlay frames from inputs
+    ret = ff_framesync_dualinput_get(fs, &input_main, &input_overlay);
+    if (ret < 0)
+        return ret;
+
+    if (!input_main || !input_overlay)
+        return AVERROR_BUG;
+
+    ret = av_frame_make_writable(input_main);
+    if (ret < 0) {
+        av_frame_free(&input_main);
+        return ret;
+    }
+
+    // push cuda context
+
+    ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx));
+    if (ret < 0) {
+        av_frame_free(&input_main);
+        return ret;
+    }
+
+    // overlay first plane
+
+    overlay_cuda_call_kernel(ctx,
+        ctx->x_position, ctx->y_position,
+        input_main->data[0], input_main->linesize[0],
+        input_main->width, input_main->height,
+        input_overlay->data[0], input_overlay->linesize[0],
+        input_overlay->width, input_overlay->height,
+        input_overlay->data[3], input_overlay->linesize[3], 1, 1);
+
+    // overlay rest planes depending on pixel format
+
+    switch(ctx->in_format_overlay) {
+    case AV_PIX_FMT_NV12:
+        overlay_cuda_call_kernel(ctx,
+            ctx->x_position, ctx->y_position / 2,
+            input_main->data[1], input_main->linesize[1],
+            input_main->width, input_main->height / 2,
+            input_overlay->data[1], input_overlay->linesize[1],
+            input_overlay->width, input_overlay->height / 2,
+            0, 0, 0, 0);
+        break;
+    case AV_PIX_FMT_YUV420P:
+    case AV_PIX_FMT_YUVA420P:
+        overlay_cuda_call_kernel(ctx,
+            ctx->x_position / 2 , ctx->y_position / 2,
+            input_main->data[1], input_main->linesize[1],
+            input_main->width / 2, input_main->height / 2,
+            input_overlay->data[1], input_overlay->linesize[1],
+            input_overlay->width / 2, input_overlay->height / 2,
+            input_overlay->data[3], input_overlay->linesize[3], 2, 2);
+
+        overlay_cuda_call_kernel(ctx,
+            ctx->x_position / 2 , ctx->y_position / 2,
+            input_main->data[2], input_main->linesize[2],
+            input_main->width / 2, input_main->height / 2,
+            input_overlay->data[2], input_overlay->linesize[2],
+            input_overlay->width / 2, input_overlay->height / 2,
+            input_overlay->data[3], input_overlay->linesize[3], 2, 2);
+        break;
+    default:
+        av_log(ctx, AV_LOG_ERROR, "Passed unsupported overlay pixel format\n");
+        av_frame_free(&input_main);
+        CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+        return AVERROR_BUG;
+    }
+
+    CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+
+    return ff_filter_frame(outlink, input_main);
+}
+
+/**
+ * Initialize overlay_cuda
+ */
+static av_cold int overlay_cuda_init(AVFilterContext *avctx)
+{
+    OverlayCUDAContext* ctx = avctx->priv;
+    ctx->fs.on_event = &overlay_cuda_blend;
+
+    return 0;
+}
+
+/**
+ * Uninitialize overlay_cuda
+ */
+static av_cold void overlay_cuda_uninit(AVFilterContext *avctx)
+{
+    OverlayCUDAContext* ctx = avctx->priv;
+
+    ff_framesync_uninit(&ctx->fs);
+
+    if (ctx->hwctx && ctx->cu_module) {
+        CUcontext dummy;
+        CudaFunctions *cu = ctx->hwctx->internal->cuda_dl;
+        CHECK_CU(cu->cuCtxPushCurrent(ctx->cu_ctx));
+        CHECK_CU(cu->cuModuleUnload(ctx->cu_module));
+        CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+    }
+}
+
+/**
+ * Activate overlay_cuda
+ */
+static int overlay_cuda_activate(AVFilterContext *avctx)
+{
+    OverlayCUDAContext *ctx = avctx->priv;
+
+    return ff_framesync_activate(&ctx->fs);
+}
+
+/**
+ * Query formats
+ */
+static int overlay_cuda_query_formats(AVFilterContext *avctx)
+{
+    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(avctx, pix_fmts);
+}
+
+/**
+ * Configure output
+ */
+static int overlay_cuda_config_output(AVFilterLink *outlink)
+{
+
+    extern char vf_overlay_cuda_ptx[];
+
+    int err;
+    AVFilterContext* avctx = outlink->src;
+    OverlayCUDAContext* ctx = avctx->priv;
+
+    AVFilterLink *inlink = avctx->inputs[0];
+    AVHWFramesContext  *frames_ctx = (AVHWFramesContext*)inlink->hw_frames_ctx->data;
+
+    AVFilterLink *inlink_overlay = avctx->inputs[1];
+    AVHWFramesContext  *frames_ctx_overlay = (AVHWFramesContext*)inlink_overlay->hw_frames_ctx->data;
+
+    CUcontext dummy, cuda_ctx;
+    CudaFunctions *cu;
+
+    // check main input formats
+
+    if (!frames_ctx) {
+        av_log(ctx, AV_LOG_ERROR, "No hw context provided on main input\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->in_format_main = frames_ctx->sw_format;
+    if (!format_is_supported(supported_main_formats, ctx->in_format_main)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported main input format: %s\n",
+               av_get_pix_fmt_name(ctx->in_format_main));
+        return AVERROR(ENOSYS);
+    }
+
+    // check overlay input formats
+
+    if (!frames_ctx_overlay) {
+        av_log(ctx, AV_LOG_ERROR, "No hw context provided on overlay input\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->in_format_overlay = frames_ctx_overlay->sw_format;
+    if (!format_is_supported(supported_overlay_formats, ctx->in_format_overlay)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported overlay input format: %s\n",
+            av_get_pix_fmt_name(ctx->in_format_overlay));
+        return AVERROR(ENOSYS);
+    }
+
+    // check we can overlay pictures with those pixel formats
+
+    if (!formats_match(ctx->in_format_main, ctx->in_format_overlay)) {
+        av_log(ctx, AV_LOG_ERROR, "Can't overlay %s on %s \n",
+            av_get_pix_fmt_name(ctx->in_format_overlay), av_get_pix_fmt_name(ctx->in_format_main));
+        return AVERROR(EINVAL);
+    }
+
+    // initialize
+
+    ctx->hwctx = frames_ctx->device_ctx->hwctx;
+    cuda_ctx = ctx->hwctx->cuda_ctx;
+    ctx->fs.time_base = inlink->time_base;
+
+    ctx->cu_stream = ctx->hwctx->stream;
+
+    outlink->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
+
+    // load functions
+
+    cu = ctx->hwctx->internal->cuda_dl;
+
+    err = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx));
+    if (err < 0) {
+        return err;
+    }
+
+    err = CHECK_CU(cu->cuModuleLoadData(&ctx->cu_module, vf_overlay_cuda_ptx));
+    if (err < 0) {
+        CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+        return err;
+    }
+
+    err = CHECK_CU(cu->cuModuleGetFunction(&ctx->cu_func, ctx->cu_module, "Overlay_Cuda"));
+    if (err < 0) {
+        CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+        return err;
+    }
+
+    CHECK_CU(cu->cuCtxPopCurrent(&dummy));
+
+    // init dual input
+
+    err = ff_framesync_init_dualinput(&ctx->fs, avctx);
+    if (err < 0) {
+        return err;
+    }
+
+    return ff_framesync_configure(&ctx->fs);
+}
+
+
+#define OFFSET(x) offsetof(OverlayCUDAContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+
+static const AVOption overlay_cuda_options[] = {
+    { "x", "Overlay x position",
+      OFFSET(x_position), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, .flags = FLAGS },
+    { "y", "Overlay y position",
+      OFFSET(y_position), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, .flags = FLAGS },
+    { "eof_action", "Action to take when encountering EOF from secondary input ",
+        OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
+        EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
+        { "repeat", "Repeat the previous frame.",   0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
+        { "endall", "End both streams.",            0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
+        { "pass",   "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS },   .flags = FLAGS, "eof_action" },
+    { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
+    { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
+    { NULL },
+};
+
+FRAMESYNC_DEFINE_CLASS(overlay_cuda, OverlayCUDAContext, fs);
+
+static const AVFilterPad overlay_cuda_inputs[] = {
+    {
+        .name         = "main",
+        .type         = AVMEDIA_TYPE_VIDEO,
+    },
+    {
+        .name         = "overlay",
+        .type         = AVMEDIA_TYPE_VIDEO,
+    },
+    { NULL }
+};
+
+static const AVFilterPad overlay_cuda_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .config_props  = &overlay_cuda_config_output,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_overlay_cuda = {
+    .name            = "overlay_cuda",
+    .description     = NULL_IF_CONFIG_SMALL("Overlay one video on top of another using CUDA"),
+    .priv_size       = sizeof(OverlayCUDAContext),
+    .priv_class      = &overlay_cuda_class,
+    .init            = &overlay_cuda_init,
+    .uninit          = &overlay_cuda_uninit,
+    .activate        = &overlay_cuda_activate,
+    .query_formats   = &overlay_cuda_query_formats,
+    .inputs          = overlay_cuda_inputs,
+    .outputs         = overlay_cuda_outputs,
+    .preinit         = overlay_cuda_framesync_preinit,
+    .flags_internal  = FF_FILTER_FLAG_HWFRAME_AWARE,
+};