I tried to solve all the review comments from the last patchset,
please review in case I missed anything. Thanks
Στις Σάβ 17 Μαΐ 2025 στις 11:49 μ.μ., ο/η IndecisiveTurtle
<geoste...@gmail.com> έγραψε:
>
> From: IndecisiveTurtle <geoste...@gmail.com>
>
> Performance wise, encoding a 3440x1440 1-minute video is performed in about
> 2.4 minutes with the cpu encoder running on my Ryzen 5 4600H, while it takes
> about 1.3 minutes on my NVIDIA GTX 1650
>
> Haar shader has a subgroup optimized variant that applies when configured
> wavelet depth allows it
> ---
> configure | 1 +
> libavcodec/Makefile | 3 +
> libavcodec/allcodecs.c | 1 +
> libavcodec/vc2enc_vulkan.c | 775 +++++++++++++++++++
> libavcodec/vulkan/vc2_dwt_haar.comp | 82 ++
> libavcodec/vulkan/vc2_dwt_haar_subgroup.comp | 75 ++
> libavcodec/vulkan/vc2_dwt_hor_legall.comp | 82 ++
> libavcodec/vulkan/vc2_dwt_upload.comp | 96 +++
> libavcodec/vulkan/vc2_dwt_ver_legall.comp | 78 ++
> libavcodec/vulkan/vc2_encode.comp | 159 ++++
> libavcodec/vulkan/vc2_slice_sizes.comp | 170 ++++
> 11 files changed, 1522 insertions(+)
> create mode 100644 libavcodec/vc2enc_vulkan.c
> create mode 100644 libavcodec/vulkan/vc2_dwt_haar.comp
> create mode 100644 libavcodec/vulkan/vc2_dwt_haar_subgroup.comp
> create mode 100644 libavcodec/vulkan/vc2_dwt_hor_legall.comp
> create mode 100644 libavcodec/vulkan/vc2_dwt_upload.comp
> create mode 100644 libavcodec/vulkan/vc2_dwt_ver_legall.comp
> create mode 100644 libavcodec/vulkan/vc2_encode.comp
> create mode 100644 libavcodec/vulkan/vc2_slice_sizes.comp
>
> diff --git a/configure b/configure
> index 2e69b3c56c..09f9dff258 100755
> --- a/configure
> +++ b/configure
> @@ -3132,6 +3132,7 @@ utvideo_encoder_select="bswapdsp huffman llvidencdsp"
> vble_decoder_select="llviddsp"
> vbn_decoder_select="texturedsp"
> vbn_encoder_select="texturedspenc"
> +vc2_vulkan_encoder_select="vulkan spirv_compiler"
> vmix_decoder_select="idctdsp"
> vc1_decoder_select="blockdsp h264qpel intrax8 mpegvideodec qpeldsp vc1dsp"
> vc1image_decoder_select="vc1_decoder"
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index bdf0d6742e..20968520d7 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -772,6 +772,9 @@ OBJS-$(CONFIG_VC1_MMAL_DECODER) += mmaldec.o
> OBJS-$(CONFIG_VC1_QSV_DECODER) += qsvdec.o
> OBJS-$(CONFIG_VC1_V4L2M2M_DECODER) += v4l2_m2m_dec.o
> OBJS-$(CONFIG_VC2_ENCODER) += vc2enc.o vc2enc_dwt.o
> vc2enc_common.o diractab.o
> +OBJS-$(CONFIG_VC2_VULKAN_ENCODER) += vc2enc_vulkan.o
> vulkan/vc2_encode.o vulkan/vc2_slice_sizes.o \
> + vulkan/vc2_dwt_hor_legall.o
> vulkan/vc2_dwt_ver_legall.o \
> + vulkan/vc2_dwt_upload.o
> vulkan/vc2_dwt_haar.o vulkan/vc2_dwt_haar_subgroup.o
> OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o
> OBJS-$(CONFIG_VMDAUDIO_DECODER) += vmdaudio.o
> OBJS-$(CONFIG_VMDVIDEO_DECODER) += vmdvideo.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index cd4f6ecd59..cd23a9490c 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -367,6 +367,7 @@ extern const FFCodec ff_vc1_mmal_decoder;
> extern const FFCodec ff_vc1_qsv_decoder;
> extern const FFCodec ff_vc1_v4l2m2m_decoder;
> extern const FFCodec ff_vc2_encoder;
> +extern const FFCodec ff_vc2_vulkan_encoder;
> extern const FFCodec ff_vcr1_decoder;
> extern const FFCodec ff_vmdvideo_decoder;
> extern const FFCodec ff_vmix_decoder;
> diff --git a/libavcodec/vc2enc_vulkan.c b/libavcodec/vc2enc_vulkan.c
> new file mode 100644
> index 0000000000..23b204cf92
> --- /dev/null
> +++ b/libavcodec/vc2enc_vulkan.c
> @@ -0,0 +1,775 @@
> +/*
> + * Copyright (C) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#include "libavutil/avassert.h"
> +#include "libavutil/mem.h"
> +#include "libavutil/pixdesc.h"
> +#include "libavutil/opt.h"
> +#include "libavutil/thread.h"
> +#include "libavutil/version.h"
> +#include "libavutil/vulkan_spirv.h"
> +#include "libavutil/hwcontext_vulkan.h"
> +#include "libavutil/vulkan_loader.h"
> +#include "libavutil/vulkan.h"
> +#include "codec_internal.h"
> +#include "internal.h"
> +#include "encode.h"
> +#include "version.h"
> +#include "vc2enc_common.h"
> +#include "hwconfig.h"
> +
> +#define LEGALL_TILE_DIM 16
> +#define LEGALL_WORKGROUP_X 64
> +#define SLICE_WORKGROUP_X 128
> +#define MAX_NUM_PLANES 3
> +
> +extern const char *ff_source_common_comp;
> +extern const char *ff_source_vc2_encode_comp;
> +extern const char *ff_source_vc2_dwt_hor_legall_comp;
> +extern const char *ff_source_vc2_dwt_ver_legall_comp;
> +extern const char *ff_source_vc2_slice_sizes_comp;
> +extern const char *ff_source_vc2_dwt_upload_comp;
> +extern const char *ff_source_vc2_dwt_haar_comp;
> +extern const char *ff_source_vc2_dwt_haar_subgroup_comp;
> +
> +typedef struct VC2DwtPushData {
> + int s;
> + union {
> + int diff_offset;
> + int plane_idx;
> + };
> + int level;
> +} VC2DwtPushData;
> +
> +typedef struct VC2EncAuxData {
> + int quant[MAX_DWT_LEVELS][4];
> + int ff_dirac_qscale_tab[116];
> + uint16_t interleaved_ue_golomb_tab[256];
> + uint16_t top_interleaved_ue_golomb_tab[256];
> + uint8_t golomb_len_tab[256];
> +} VC2EncAuxData;
> +
> +typedef struct VC2EncPushData {
> + VkDeviceAddress pb;
> + int num_x;
> + int num_y;
> + int wavelet_depth;
> + int size_scaler;
> + int prefix_bytes;
> +} VC2EncPushData;
> +
> +typedef struct VC2EncSliceArgs {
> + int quant_idx;
> + int bytes;
> + int pb_start;
> + int pad;
> +} VC2EncSliceArgs;
> +
> +typedef struct VC2EncSliceCalcPushData {
> + int num_x;
> + int num_y;
> + int wavelet_depth;
> + int size_scaler;
> + int prefix_bytes;
> + int bits_ceil;
> + int bits_floor;
> +} VC2EncSliceCalcPushData;
> +
> +typedef struct VC2EncVulkanContext {
> + VC2EncContext base;
> + FFVkBuffer lut_buf;
> + FFVkBuffer slice_buf;
> + VC2EncSliceArgs *slice_args;
> +
> + /* Vulkan state */
> + FFVulkanContext vkctx;
> + AVVulkanDeviceQueueFamily *qf;
> + FFVkExecPool e;
> + FFVkExecContext *exec;
> +
> + FFVulkanShader dwt_haar_shd;
> + FFVulkanShader dwt_upload_shd;
> + FFVulkanShader dwt_hor_shd, dwt_ver_shd;
> + FFVulkanShader slice_shd;
> + FFVulkanShader enc_shd;
> + AVBufferPool* dwt_buf_pool;
> + int haar_subgroup;
> +
> + VkBuffer plane_buf;
> + VC2EncPushData enc_consts;
> + VC2DwtPushData dwt_consts;
> + VC2EncSliceCalcPushData calc_consts;
> +
> + /* Intermediate frame pool */
> + AVBufferRef *intermediate_frames_ref[3];
> + AVFrame *intermediate_frame[AV_NUM_DATA_POINTERS];
> + VkImageView intermediate_views[AV_NUM_DATA_POINTERS];
> +} VC2EncVulkanContext;
> +
> +static int init_vulkan_pipeline(VC2EncVulkanContext* s, FFVkSPIRVCompiler
> *spv,
> + FFVulkanShader* shd, int push_size,
> + int lg_x, int lg_y, int lg_z,
> + const char* pl_name, const char* pl_source,
> + int start_desc, int num_desc)
> +{
> + int err = 0;
> + uint8_t *spv_data;
> + size_t spv_len;
> + void *spv_opaque = NULL;
> + FFVulkanContext *vkctx = &s->vkctx;
> + FFVulkanDescriptorSetBinding *desc;
> +
> + ff_vk_shader_init(vkctx, shd, pl_name, VK_SHADER_STAGE_COMPUTE_BIT,
> + NULL, 0, lg_x, lg_y, lg_z, 0);
> +
> + av_bprintf(&shd->src, "struct SliceArgs {int quant_idx;int bytes;int
> pb_start;int pad;};\n");
> +
> + desc = (FFVulkanDescriptorSetBinding []) {
> + {
> + .name = "src_planes",
> + .type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
> + .mem_layout = ff_vk_shader_rep_fmt(vkctx->frames->sw_format,
> FF_VK_REP_UINT),
> + .dimensions = 2,
> + .elems = av_pix_fmt_count_planes(vkctx->frames->sw_format),
> + .stages = VK_SHADER_STAGE_COMPUTE_BIT,
> + },
> + {
> + .name = "coef_buf",
> + .type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
> + .mem_layout = "r32i",
> + .dimensions = 2,
> + .elems = 3,
> + .stages = VK_SHADER_STAGE_COMPUTE_BIT,
> + },
> + {
> + .name = "AuxData",
> + .type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
> + .stages = VK_SHADER_STAGE_COMPUTE_BIT,
> + .mem_layout = "scalar",
> + .buf_content = "int lut_quant[5][4]; int
> ff_dirac_qscale_tab[116]; "
> + "uint16_t interleaved_ue_golomb_tab[256]; "
> + "uint16_t top_interleaved_ue_golomb_tab[256]; "
> + "uint8_t golomb_len_tab[256];",
> + },
> + {
> + .name = "SliceBuffer",
> + .type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
> + .stages = VK_SHADER_STAGE_COMPUTE_BIT,
> + .mem_layout = "scalar",
> + .buf_content = "SliceArgs slice_args[];",
> + },
> + };
> + RET(ff_vk_shader_add_descriptor_set(vkctx, shd, desc + start_desc,
> num_desc, 0, 0));
> +
> + ff_vk_shader_add_push_const(shd, 0, push_size,
> VK_SHADER_STAGE_COMPUTE_BIT);
> + av_bprintf(&shd->src, "#define PB_UNALIGNED\n");
> + av_bprintf(&shd->src, "#define PLANE_FMT %d\n",
> vkctx->frames->sw_format);
> + GLSLD(ff_source_common_comp);
> + GLSLD(pl_source);
> +
> + /* Compile Haar shader */
> + RET(spv->compile_shader(vkctx, spv, shd, &spv_data, &spv_len, "main",
> &spv_opaque));
> + RET(ff_vk_shader_link(vkctx, shd, spv_data, spv_len, "main"));
> + RET(ff_vk_shader_register_exec(vkctx, &s->e, shd));
> +
> +fail:
> + return err;
> +}
> +
> +static int init_frame_pools(AVCodecContext *avctx)
> +{
> + int i, err = 0;
> + VC2EncVulkanContext *sv = avctx->priv_data;
> + AVHWFramesContext *frames_ctx;
> + AVVulkanFramesContext *vk_frames;
> + enum AVPixelFormat sw_format = AV_PIX_FMT_GRAY32;
> +
> + for (i = 0; i < 3; i++) {
> + sv->intermediate_frames_ref[i] =
> av_hwframe_ctx_alloc(sv->vkctx.device_ref);
> + if (!sv->intermediate_frames_ref[i])
> + return AVERROR(ENOMEM);
> +
> + frames_ctx = (AVHWFramesContext
> *)sv->intermediate_frames_ref[i]->data;
> + frames_ctx->format = AV_PIX_FMT_VULKAN;
> + frames_ctx->sw_format = sw_format;
> + frames_ctx->width = sv->base.plane[i].dwt_width;
> + frames_ctx->height = sv->base.plane[i].dwt_height;
> +
> + vk_frames = frames_ctx->hwctx;
> + vk_frames->tiling = VK_IMAGE_TILING_OPTIMAL;
> + vk_frames->usage = VK_IMAGE_USAGE_STORAGE_BIT;
> + vk_frames->img_flags = VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT;
> +
> + err = av_hwframe_ctx_init(sv->intermediate_frames_ref[i]);
> + if (err < 0) {
> + av_log(avctx, AV_LOG_ERROR, "Unable to initialize frame pool
> with format %s: %s\n",
> + av_get_pix_fmt_name(sw_format), av_err2str(err));
> + av_buffer_unref(&sv->intermediate_frames_ref[i]);
> + return err;
> + }
> + }
> +
> + return err;
> +}
> +
> +static void vulkan_bind_img_planes(FFVulkanContext *s, FFVkExecContext *e,
> + FFVulkanShader *shd, VkImageView *views,
> + int set, int binding)
> +{
> + for (int i = 0; i < 3; i++)
> + ff_vk_shader_update_img(s, e, shd, set, binding, i,
> + views[i], VK_IMAGE_LAYOUT_GENERAL,
> + VK_NULL_HANDLE);
> +}
> +
> +static void dwt_plane_haar(VC2EncVulkanContext *s, FFVkExecContext *exec,
> + VkImageMemoryBarrier2* img_bar, int nb_img_bar)
> +{
> + int p, group_x, group_y;
> + FFVulkanContext *vkctx = &s->vkctx;
> + FFVulkanFunctions *vk = &vkctx->vkfn;
> + Plane* plane;
> +
> + s->dwt_consts.level = s->base.wavelet_depth;
> + vulkan_bind_img_planes(vkctx, exec, &s->dwt_haar_shd,
> s->intermediate_views, 0, 0);
> + ff_vk_exec_bind_shader(vkctx, exec, &s->dwt_haar_shd);
> +
> + /* Haar pass */
> + for (p = 0; p < 3; p++) {
> + plane = &s->base.plane[p];
> + s->dwt_consts.plane_idx = p;
> + if (s->haar_subgroup) {
> + group_x = FFALIGN(plane->dwt_width, 8) >> 3;
> + group_y = FFALIGN(plane->dwt_height, 8) >> 3;
> + } else {
> + group_x = FFALIGN(plane->dwt_width, 32) >> 5;
> + group_y = FFALIGN(plane->dwt_height, 32) >> 5;
> + }
> +
> + ff_vk_shader_update_push_const(vkctx, exec, &s->dwt_haar_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2DwtPushData),
> &s->dwt_consts);
> + vk->CmdDispatch(exec->buf, group_x, group_y, 1);
> + }
> +
> + /* Wait for haar dispatches to complete */
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers = img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> +}
> +
> +static void dwt_plane_legall(VC2EncVulkanContext *s, FFVkExecContext *exec,
> + VkImageMemoryBarrier2* img_bar, int nb_img_bar)
> +{
> + FFVulkanContext *vkctx = &s->vkctx;
> + FFVulkanFunctions *vk = &vkctx->vkfn;
> + int legall_group_x = (s->base.plane[0].dwt_height + LEGALL_WORKGROUP_X -
> 1) >> 6;
> + int legall_group_y = (s->base.plane[0].dwt_width + LEGALL_WORKGROUP_X -
> 1) >> 6;
> + int i;
> +
> + /* Perform legall wavelet trasform */
> + for (i = 0; i < s->base.wavelet_depth; i++) {
> + s->dwt_consts.level = i;
> +
> + /* Horizontal legall pass */
> + vulkan_bind_img_planes(vkctx, exec, &s->dwt_hor_shd,
> s->intermediate_views, 0, 0);
> + ff_vk_exec_bind_shader(vkctx, exec, &s->dwt_hor_shd);
> + ff_vk_shader_update_push_const(vkctx, exec, &s->dwt_hor_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2DwtPushData),
> &s->dwt_consts);
> + vk->CmdDispatch(exec->buf, legall_group_x, 1, 3);
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers =
> img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> +
> + /* Vertical legall pass */
> + vulkan_bind_img_planes(vkctx, exec, &s->dwt_ver_shd,
> s->intermediate_views, 0, 0);
> + ff_vk_exec_bind_shader(vkctx, exec, &s->dwt_ver_shd);
> + ff_vk_shader_update_push_const(vkctx, exec, &s->dwt_ver_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2DwtPushData),
> &s->dwt_consts);
> + vk->CmdDispatch(exec->buf, legall_group_y, 1, 3);
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers =
> img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> + }
> +}
> +
> +static int dwt_planes(VC2EncVulkanContext *s, AVFrame *frame)
> +{
> + int i, err = 0, nb_img_bar = 0;
> + int wavelet_idx = s->base.wavelet_idx;
> + int group_x = s->base.plane[0].dwt_width >> 3;
> + int group_y = s->base.plane[0].dwt_height >> 3;
> + FFVulkanContext *vkctx = &s->vkctx;
> + FFVulkanFunctions *vk = &vkctx->vkfn;
> + FFVkExecContext *exec = s->exec;
> + VkImageView views[AV_NUM_DATA_POINTERS];
> + VkImageMemoryBarrier2 img_bar[AV_NUM_DATA_POINTERS];
> +
> + /* Generate barriers and image views for frame images. */
> + RET(ff_vk_exec_add_dep_frame(vkctx, exec, frame,
> + VK_PIPELINE_STAGE_2_ALL_COMMANDS_BIT,
> + VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT));
> + RET(ff_vk_create_imageviews(vkctx, exec, views, frame, FF_VK_REP_UINT));
> + ff_vk_frame_barrier(vkctx, exec, frame, img_bar, &nb_img_bar,
> + VK_PIPELINE_STAGE_2_ALL_COMMANDS_BIT,
> + VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT,
> + VK_ACCESS_SHADER_READ_BIT,
> + VK_IMAGE_LAYOUT_GENERAL,
> + VK_QUEUE_FAMILY_IGNORED);
> +
> + /* Submit the image barriers. */
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers = img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> +
> + /* Create a temporaty frames */
> + nb_img_bar = 0;
> + for (i = 0; i < 3; i++) {
> + s->intermediate_frame[i] = av_frame_alloc();
> + if (!s->intermediate_frame[i])
> + return AVERROR(ENOMEM);
> +
> + RET(av_hwframe_get_buffer(s->intermediate_frames_ref[i],
> + s->intermediate_frame[i], 0));
> + RET(ff_vk_exec_add_dep_frame(vkctx, exec, s->intermediate_frame[i],
> + VK_PIPELINE_STAGE_2_ALL_COMMANDS_BIT,
> +
> VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT));
> + RET(ff_vk_create_imageviews(vkctx, exec, &s->intermediate_views[i],
> + s->intermediate_frame[i],
> FF_VK_REP_INT));
> + ff_vk_frame_barrier(vkctx, exec, s->intermediate_frame[i], img_bar,
> &nb_img_bar,
> + VK_PIPELINE_STAGE_2_ALL_COMMANDS_BIT,
> + VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT,
> + VK_ACCESS_SHADER_READ_BIT,
> + VK_IMAGE_LAYOUT_GENERAL,
> + VK_QUEUE_FAMILY_IGNORED);
> + }
> +
> + /* Submit the image barriers. */
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers = img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> +
> + /* Bind input images to the shader. */
> + ff_vk_shader_update_img_array(vkctx, exec, &s->dwt_upload_shd, frame,
> views, 0, 0,
> + VK_IMAGE_LAYOUT_GENERAL, VK_NULL_HANDLE);
> + vulkan_bind_img_planes(vkctx, exec, &s->dwt_upload_shd,
> s->intermediate_views, 0, 1);
> +
> + /* Upload coefficients from planes to the buffer. */
> + s->dwt_consts.diff_offset = s->base.diff_offset;
> + ff_vk_exec_bind_shader(vkctx, exec, &s->dwt_upload_shd);
> + ff_vk_shader_update_push_const(vkctx, exec, &s->dwt_upload_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2DwtPushData),
> &s->dwt_consts);
> + vk->CmdDispatch(exec->buf, group_x, group_y, 1);
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType =
> VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pImageMemoryBarriers = img_bar,
> + .imageMemoryBarrierCount =
> nb_img_bar,
> + });
> +
> + /* Perform wavelet trasform. */
> + if (wavelet_idx == VC2_TRANSFORM_HAAR || wavelet_idx ==
> VC2_TRANSFORM_HAAR_S)
> + dwt_plane_haar(s, exec, img_bar, nb_img_bar);
> + else if (wavelet_idx == VC2_TRANSFORM_5_3)
> + dwt_plane_legall(s, exec, img_bar, nb_img_bar);
> +
> +fail:
> + return err;
> +}
> +
> +static void encode_slices(VC2EncContext *s)
> +{
> + VC2EncVulkanContext *sv = (VC2EncVulkanContext*)s;
> + FFVkExecContext *exec = sv->exec;
> + int num_slices = s->num_x * s->num_y;
> + int num_slice_groups = (num_slices + SLICE_WORKGROUP_X - 1) >> 7;
> + int i, skip = 0;
> + FFVulkanContext *vkctx = &sv->vkctx;
> + FFVulkanFunctions *vk = &vkctx->vkfn;
> +
> + /* Calculate slice sizes. */
> + vulkan_bind_img_planes(vkctx, exec, &sv->slice_shd,
> sv->intermediate_views, 0, 0);
> + ff_vk_shader_update_desc_buffer(vkctx, exec, &sv->slice_shd,
> + 0, 1, 0, &sv->lut_buf, 0,
> + sizeof(VC2EncAuxData),
> + VK_FORMAT_UNDEFINED);
> + ff_vk_shader_update_desc_buffer(vkctx, exec, &sv->slice_shd,
> + 0, 2, 0, &sv->slice_buf, 0,
> + sv->slice_buf.size,
> + VK_FORMAT_UNDEFINED);
> + ff_vk_exec_bind_shader(vkctx, exec, &sv->slice_shd);
> + ff_vk_shader_update_push_const(vkctx, exec, &sv->slice_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2EncSliceCalcPushData),
> &sv->calc_consts);
> + vk->CmdDispatch(exec->buf, num_slice_groups, 1, 1);
> +
> + flush_put_bits(&s->pb);
> + sv->enc_consts.pb += put_bytes_output(&s->pb);
> +
> + /* Wait for slice sizes to be written. */
> + vk->CmdPipelineBarrier2(exec->buf, &(VkDependencyInfo) {
> + .sType = VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
> + .pBufferMemoryBarriers = &(VkBufferMemoryBarrier2) {
> + .sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER_2,
> + .srcStageMask = VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT,
> + .dstStageMask = VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT,
> + .srcAccessMask = VK_ACCESS_2_SHADER_WRITE_BIT,
> + .dstAccessMask = VK_ACCESS_2_SHADER_READ_BIT,
> + .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
> + .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
> + .buffer = sv->slice_buf.buf,
> + .size = sizeof(VC2EncSliceArgs) * num_slices,
> + .offset = 0,
> + },
> + .bufferMemoryBarrierCount = 1U,
> + });
> +
> + /* Perform the encoding. */
> + vulkan_bind_img_planes(vkctx, exec, &sv->enc_shd,
> sv->intermediate_views, 0, 0);
> + ff_vk_shader_update_desc_buffer(vkctx, exec, &sv->enc_shd,
> + 0, 1, 0, &sv->lut_buf, 0,
> + sizeof(VC2EncAuxData),
> + VK_FORMAT_UNDEFINED);
> + ff_vk_shader_update_desc_buffer(vkctx, exec, &sv->enc_shd,
> + 0, 2, 0, &sv->slice_buf, 0,
> + sv->slice_buf.size,
> + VK_FORMAT_UNDEFINED);
> + ff_vk_exec_bind_shader(vkctx, exec, &sv->enc_shd);
> + ff_vk_shader_update_push_const(vkctx, exec, &sv->enc_shd,
> VK_SHADER_STAGE_COMPUTE_BIT,
> + 0, sizeof(VC2EncPushData),
> &sv->enc_consts);
> +
> + vk->CmdDispatch(exec->buf, num_slice_groups, 1, 1);
> +
> + ff_vk_exec_submit(vkctx, exec);
> + ff_vk_exec_wait(vkctx, exec);
> +
> + for (int slice_y = 0; slice_y < s->num_y; slice_y++) {
> + for (int slice_x = 0; slice_x < s->num_x; slice_x++) {
> + VC2EncSliceArgs *args = &sv->slice_args[s->num_x * slice_y +
> slice_x];
> + skip += args->bytes;
> + }
> + }
> +
> + /* Skip forward to write end header */
> + skip_put_bytes(&s->pb, skip);
> +
> + /* Free allocated intermediate frames */
> + for (i = 0; i < 3; i++)
> + av_frame_free(&sv->intermediate_frame[i]);
> +}
> +
> +static int encode_frame(VC2EncVulkanContext *sv, AVPacket *avpkt,
> + const AVFrame *frame, const int header_size)
> +{
> + int ret;
> + int64_t max_frame_bytes;
> + AVBufferRef *avpkt_buf = NULL;
> + FFVkBuffer* buf_vk = NULL;
> + VC2EncContext* s = &sv->base;
> + FFVulkanContext *vkctx = &sv->vkctx;
> +
> + /* Perform wavelet pass on the input data. */
> + ret = dwt_planes(sv, (AVFrame*)frame);
> + if (ret)
> + return ret;
> +
> + /* Allocate a buffer that can fit at all all 3 planes of data */
> + max_frame_bytes = header_size + MAX_NUM_PLANES * s->avctx->width
> + * s->avctx->height
> + * sizeof(dwtcoef);
> +
> + /* Get a pooled device local host visible buffer for writing output data
> */
> + ret = ff_vk_get_pooled_buffer(vkctx, &sv->dwt_buf_pool, &avpkt_buf,
> + VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
> + VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT,
> NULL,
> + max_frame_bytes,
> + VK_MEMORY_PROPERTY_HOST_CACHED_BIT |
> + VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
> + VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
> + if (ret < 0)
> + return ret;
> +
> + ff_vk_exec_add_dep_buf(vkctx, sv->exec, &avpkt_buf, 1, 1);
> + buf_vk = (FFVkBuffer *)avpkt_buf->data;
> + sv->enc_consts.pb = buf_vk->address;
> +
> + /* Initialize packet. */
> + avpkt->buf = avpkt_buf;
> + avpkt->data = buf_vk->mapped_mem;
> + avpkt->size = max_frame_bytes;
> + init_put_bits(&s->pb, avpkt->data, avpkt->size);
> +
> + /* Encode frame */
> + ff_vc2_encode_frame(s, encode_slices);
> +
> + return 0;
> +}
> +
> +static av_cold int vc2_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
> + const AVFrame *frame, int *got_packet)
> +{
> + int ret = 0;
> + VC2EncVulkanContext *sv = avctx->priv_data;
> + VC2EncContext *s = &sv->base;
> + const int bitexact = avctx->flags & AV_CODEC_FLAG_BITEXACT;
> + const int aux_data_size = bitexact ? sizeof("Lavc") :
> sizeof(LIBAVCODEC_IDENT);
> + const int header_size = 100 + aux_data_size;
> +
> + ret = ff_vc2_frame_init_properties(avctx, s);
> + if (ret)
> + return ret;
> +
> + sv->calc_consts.size_scaler = s->size_scaler;
> + sv->calc_consts.bits_ceil = s->slice_max_bytes << 3;
> + sv->calc_consts.bits_floor = s->slice_min_bytes << 3;
> + sv->enc_consts.prefix_bytes = 0;
> + sv->enc_consts.size_scaler = s->size_scaler;
> +
> + sv->exec = ff_vk_exec_get(&sv->vkctx, &sv->e);
> + ff_vk_exec_start(&sv->vkctx, sv->exec);
> +
> + ret = encode_frame(sv, avpkt, frame, header_size);
> + if (ret)
> + return ret;
> +
> + flush_put_bits(&s->pb);
> + av_shrink_packet(avpkt, put_bytes_output(&s->pb));
> + avpkt->flags |= AV_PKT_FLAG_KEY;
> + *got_packet = 1;
> +
> + return 0;
> +}
> +
> +static av_cold int vc2_encode_end(AVCodecContext *avctx)
> +{
> + VC2EncVulkanContext *sv = avctx->priv_data;
> + FFVulkanContext *vkctx = &sv->vkctx;
> + int i;
> +
> + ff_vk_exec_pool_free(vkctx, &sv->e);
> +
> + ff_vk_shader_free(vkctx, &sv->dwt_upload_shd);
> + ff_vk_shader_free(vkctx, &sv->dwt_haar_shd);
> + ff_vk_shader_free(vkctx, &sv->dwt_hor_shd);
> + ff_vk_shader_free(vkctx, &sv->dwt_ver_shd);
> + ff_vk_shader_free(vkctx, &sv->slice_shd);
> + ff_vk_shader_free(vkctx, &sv->enc_shd);
> +
> + ff_vk_free_buf(vkctx, &sv->slice_buf);
> + ff_vk_free_buf(vkctx, &sv->lut_buf);
> +
> + for (i = 0; i < 3; i++) {
> + ff_vc2enc_free_transforms(&sv->base.transform_args[i].t);
> + av_buffer_unref(&sv->intermediate_frames_ref[i]);
> + }
> +
> + av_buffer_pool_uninit(&sv->dwt_buf_pool);
> + ff_vk_uninit(vkctx);
> +
> + return 0;
> +}
> +
> +static av_cold int vc2_encode_init(AVCodecContext *avctx)
> +{
> + int err = 0, depth;
> + const AVPixFmtDescriptor *fmt;
> + VC2EncVulkanContext *sv = avctx->priv_data;
> + VC2EncContext *s = &sv->base;
> + FFVulkanContext *vkctx = &sv->vkctx;
> + FFVkSPIRVCompiler *spv;
> + VC2EncAuxData *ad = NULL;
> + unsigned int subgroup_size = vkctx->subgroup_props.maxSubgroupSize;
> +
> + /* Init vulkan */
> + err = ff_vk_init(&sv->vkctx, avctx, NULL, avctx->hw_frames_ctx);
> + if (err < 0)
> + return err;
> +
> + sv->qf = ff_vk_qf_find(vkctx, VK_QUEUE_COMPUTE_BIT, 0);
> + if (!sv->qf) {
> + av_log(avctx, AV_LOG_ERROR, "Device has no compute queues!\n");
> + return AVERROR(ENOTSUP);
> + }
> +
> + spv = ff_vk_spirv_init();
> + if (!spv) {
> + av_log(avctx, AV_LOG_ERROR, "Unable to initialize SPIR-V
> compiler!\n");
> + return AVERROR_EXTERNAL;
> + }
> +
> + ff_vk_exec_pool_init(vkctx, sv->qf, &sv->e, 1, 0, 0, 0, NULL);
> +
> + /* Chroma subsampling */
> + err = av_pix_fmt_get_chroma_sub_sample(vkctx->frames->sw_format,
> &s->chroma_x_shift,
> +
> &s->chroma_y_shift);
> + if (err < 0)
> + return err;
> +
> + /* Bit depth and color range index */
> + fmt = av_pix_fmt_desc_get(vkctx->frames->sw_format);
> + depth = fmt->comp[0].depth;
> +
> + /* 16-bit depth is unsupported by this encoder */
> + if (depth == 16) {
> + av_log(avctx, AV_LOG_ERROR, "16-bit pixel format depth is
> unsupported by this encoder\n");
> + return AVERROR(ENOTSUP);
> + }
> +
> + /* Perform common initialization. */
> + err = ff_vc2_encode_init(avctx, depth);
> + if (err < 0)
> + return err;
> +
> + /* Initialize Haar push data */
> + sv->dwt_consts.diff_offset = s->diff_offset;
> + sv->dwt_consts.s = s->wavelet_idx == VC2_TRANSFORM_HAAR_S ? 1 : 0;
> + sv->dwt_consts.level = 0;
> +
> + /* Initializer slice calculation push data */
> + sv->calc_consts.num_x = s->num_x;
> + sv->calc_consts.num_y = s->num_y;
> + sv->calc_consts.wavelet_depth = s->wavelet_depth;
> + sv->calc_consts.prefix_bytes = s->prefix_bytes;
> +
> + /* Initialize encoder push data */
> + sv->enc_consts.wavelet_depth = s->wavelet_depth;
> + sv->enc_consts.num_x = s->num_x;
> + sv->enc_consts.num_y = s->num_y;
> +
> + /* Create buffer for encoder auxilary data. */
> + RET(ff_vk_create_buf(vkctx, &sv->lut_buf, sizeof(VC2EncAuxData), NULL,
> NULL,
> + VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT |
> + VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT,
> + VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT |
> + VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT));
> + RET(ff_vk_map_buffer(vkctx, &sv->lut_buf, (void *)&ad, 0));
> + ff_vc2_init_quant_matrix(s, ad->quant);
> + memcpy(ad->ff_dirac_qscale_tab, ff_dirac_qscale_tab,
> sizeof(ff_dirac_qscale_tab));
> + memcpy(ad->interleaved_ue_golomb_tab, interleaved_ue_golomb_tab,
> sizeof(interleaved_ue_golomb_tab));
> + memcpy(ad->top_interleaved_ue_golomb_tab, top_interleaved_ue_golomb_tab,
> sizeof(top_interleaved_ue_golomb_tab));
> + memcpy(ad->golomb_len_tab, golomb_len_tab, sizeof(golomb_len_tab));
> + RET(ff_vk_unmap_buffer(vkctx, &sv->lut_buf, 1));
> +
> + /* Create buffer for encoder auxilary data. */
> + RET(ff_vk_create_buf(vkctx, &sv->slice_buf,
> + sizeof(VC2EncSliceArgs) * s->num_x * s->num_y,
> + NULL, NULL,
> + VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
> + VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT,
> + VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT |
> + VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT));
> + RET(ff_vk_map_buffer(vkctx, &sv->slice_buf, (void *)&sv->slice_args, 0));
> + memset(sv->slice_args, 0, sv->slice_buf.size);
> +
> + /* Initialize intermediate frame pool. */
> + RET(init_frame_pools(avctx));
> +
> + /* Initialize encoding pipelines */
> + init_vulkan_pipeline(sv, spv, &sv->dwt_upload_shd,
> sizeof(VC2DwtPushData),
> + 8, 8, 1, "dwt_upload_pl",
> ff_source_vc2_dwt_upload_comp, 0, 2);
> + init_vulkan_pipeline(sv, spv, &sv->slice_shd, sizeof(VC2EncPushData),
> + SLICE_WORKGROUP_X, 1, 1, "slice_pl",
> ff_source_vc2_slice_sizes_comp, 1, 3);
> + init_vulkan_pipeline(sv, spv, &sv->enc_shd, sizeof(VC2EncPushData),
> + SLICE_WORKGROUP_X, 1, 1, "enc_pl",
> ff_source_vc2_encode_comp, 1, 3);
> + sv->haar_subgroup = 0;
> +
> + if (s->wavelet_idx == VC2_TRANSFORM_HAAR || s->wavelet_idx ==
> VC2_TRANSFORM_HAAR_S) {
> + if (subgroup_size == 32 && s->wavelet_depth < 3) {
> + init_vulkan_pipeline(sv, spv, &sv->dwt_haar_shd,
> sizeof(VC2DwtPushData),
> + 64, 1, 1, "dwt_haar_pl",
> ff_source_vc2_dwt_haar_subgroup_comp, 1, 1);
> + sv->haar_subgroup = 1;
> + } else if (subgroup_size == 64 && s->wavelet_depth < 4) {
> + init_vulkan_pipeline(sv, spv, &sv->dwt_haar_shd,
> sizeof(VC2DwtPushData),
> + 64, 1, 1, "dwt_haar_pl",
> ff_source_vc2_dwt_haar_subgroup_comp, 1, 1);
> + sv->haar_subgroup = 1;
> + } else {
> + init_vulkan_pipeline(sv, spv, &sv->dwt_haar_shd,
> sizeof(VC2DwtPushData),
> + 32, 32, 1, "dwt_haar_pl",
> ff_source_vc2_dwt_haar_comp, 1, 1);
> + }
> + } else if (s->wavelet_idx == VC2_TRANSFORM_5_3) {
> + init_vulkan_pipeline(sv, spv, &sv->dwt_hor_shd,
> sizeof(VC2DwtPushData),
> + LEGALL_WORKGROUP_X, 1, 1, "dwt_hor_pl",
> ff_source_vc2_dwt_hor_legall_comp, 1, 1);
> + init_vulkan_pipeline(sv, spv, &sv->dwt_ver_shd,
> sizeof(VC2DwtPushData),
> + LEGALL_WORKGROUP_X, 1, 1, "dwt_ver_pl",
> ff_source_vc2_dwt_ver_legall_comp, 1, 1);
> + }
> +
> +fail:
> + return err;
> +}
> +
> +#define VC2ENC_FLAGS (AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
> +static const AVOption vc2enc_options[] = {
> + {"tolerance", "Max undershoot in percent", offsetof(VC2EncContext,
> tolerance), AV_OPT_TYPE_DOUBLE, {.dbl = 5.0f}, 0.0f, 45.0f, VC2ENC_FLAGS,
> .unit = "tolerance"},
> + {"slice_width", "Slice width", offsetof(VC2EncContext, slice_width),
> AV_OPT_TYPE_INT, {.i64 = 32}, 32, 1024, VC2ENC_FLAGS, .unit = "slice_width"},
> + {"slice_height", "Slice height", offsetof(VC2EncContext, slice_height),
> AV_OPT_TYPE_INT, {.i64 = 16}, 8, 1024, VC2ENC_FLAGS, .unit = "slice_height"},
> + {"wavelet_depth", "Transform depth", offsetof(VC2EncContext,
> wavelet_depth), AV_OPT_TYPE_INT, {.i64 = 4}, 1, 5, VC2ENC_FLAGS, .unit =
> "wavelet_depth"},
> + {"wavelet_type", "Transform type", offsetof(VC2EncContext,
> wavelet_idx), AV_OPT_TYPE_INT, {.i64 = VC2_TRANSFORM_5_3}, 0,
> VC2_TRANSFORMS_NB, VC2ENC_FLAGS, .unit = "wavelet_idx"},
> + {"5_3", "LeGall (5,3)", 0, AV_OPT_TYPE_CONST,
> {.i64 = VC2_TRANSFORM_5_3}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit =
> "wavelet_idx"},
> + {"haar", "Haar (with shift)", 0, AV_OPT_TYPE_CONST,
> {.i64 = VC2_TRANSFORM_HAAR_S}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit =
> "wavelet_idx"},
> + {"haar_noshift", "Haar (without shift)", 0, AV_OPT_TYPE_CONST,
> {.i64 = VC2_TRANSFORM_HAAR}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit =
> "wavelet_idx"},
> + {"qm", "Custom quantization matrix", offsetof(VC2EncContext,
> quant_matrix), AV_OPT_TYPE_INT, {.i64 = VC2_QM_DEF}, 0, VC2_QM_NB,
> VC2ENC_FLAGS, .unit = "quant_matrix"},
> + {"default", "Default from the specifications", 0,
> AV_OPT_TYPE_CONST, {.i64 = VC2_QM_DEF}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit
> = "quant_matrix"},
> + {"color", "Prevents low bitrate discoloration", 0,
> AV_OPT_TYPE_CONST, {.i64 = VC2_QM_COL}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit
> = "quant_matrix"},
> + {"flat", "Optimize for PSNR", 0, AV_OPT_TYPE_CONST, {.i64 =
> VC2_QM_FLAT}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "quant_matrix"},
> + {NULL}
> +};
> +
> +static const AVClass vc2enc_class = {
> + .class_name = "vc2_vulkan_encoder",
> + .category = AV_CLASS_CATEGORY_ENCODER,
> + .option = vc2enc_options,
> + .item_name = av_default_item_name,
> + .version = LIBAVUTIL_VERSION_INT
> +};
> +
> +static const FFCodecDefault vc2enc_defaults[] = {
> + { "b", "600000000" },
> + { NULL },
> +};
> +
> +static const AVCodecHWConfigInternal *const ff_vc2_hw_configs[] = {
> + HW_CONFIG_ENCODER_FRAMES(VULKAN, VULKAN),
> + HW_CONFIG_ENCODER_DEVICE(NONE, VULKAN),
> + NULL,
> +};
> +
> +const FFCodec ff_vc2_vulkan_encoder = {
> + .p.name = "vc2_vulkan",
> + CODEC_LONG_NAME("SMPTE VC-2"),
> + .p.type = AVMEDIA_TYPE_VIDEO,
> + .p.id = AV_CODEC_ID_DIRAC,
> + .p.capabilities = AV_CODEC_CAP_HARDWARE,
> + .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
> + .priv_data_size = sizeof(VC2EncVulkanContext),
> + .init = vc2_encode_init,
> + .close = vc2_encode_end,
> + FF_CODEC_ENCODE_CB(vc2_encode_frame),
> + .p.priv_class = &vc2enc_class,
> + .defaults = vc2enc_defaults,
> + CODEC_PIXFMTS(AV_PIX_FMT_VULKAN),
> + .hw_configs = ff_vc2_hw_configs,
> +};
> diff --git a/libavcodec/vulkan/vc2_dwt_haar.comp
> b/libavcodec/vulkan/vc2_dwt_haar.comp
> new file mode 100644
> index 0000000000..4806cca729
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_dwt_haar.comp
> @@ -0,0 +1,82 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_buffer_reference : require
> +
> +#define LOCAL_X 1024
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + int s;
> + int plane_idx;
> + int wavelet_depth;
> +};
> +
> +shared int local_coef[LOCAL_X];
> +
> +void main()
> +{
> + ivec2 coord = ivec2(gl_GlobalInvocationID.xy);
> + ivec2 dwt_dim = imageSize(coef_buf[plane_idx]);
> + int value = imageLoad(coef_buf[plane_idx], coord).x;
> +
> + /* Perform Haar wavelet on the 32x32 local workgroup with shared memory
> */
> + for (int i = 0; i < wavelet_depth; i++)
> + {
> + ivec2 mask = ivec2((1 << i) - 1);
> + if (any(notEqual(coord & mask, ivec2(0))))
> + break;
> +
> + /* Offset between valid hor pixels for each level, +1, +2, +4 etc */
> + int dist = (1 << i);
> +
> + local_coef[gl_LocalInvocationIndex] = value;
> + barrier();
> +
> + /* Horizontal haar wavelet */
> + uint other_id = gl_LocalInvocationIndex ^ dist;
> + int other = local_coef[other_id];
> + int a = gl_LocalInvocationIndex < other_id ? value : other;
> + int b = gl_LocalInvocationIndex < other_id ? other : value;
> + int dst_b = (b - a) * (1 << s);
> + int dst_a = a * (1 << s) + ((dst_b + 1) >> 1);
> + value = gl_LocalInvocationIndex < other_id ? dst_a : dst_b;
> +
> + /* Offset between valid ver pixels for each level, +1, +2, +4 etc */
> + dist <<= 5;
> +
> + local_coef[gl_LocalInvocationIndex] = value;
> + barrier();
> +
> + /* Vertical haar wavelet */
> + other_id = gl_LocalInvocationIndex ^ dist;
> + other = local_coef[other_id];
> + a = gl_LocalInvocationIndex < other_id ? value : other;
> + b = gl_LocalInvocationIndex < other_id ? other : value;
> + dst_b = b - a;
> + dst_a = a + ((dst_b + 1) >> 1);
> + value = gl_LocalInvocationIndex < other_id ? dst_a : dst_b;
> + }
> +
> + /* Store value */
> + imageStore(coef_buf[plane_idx], coord, ivec4(value));
> +}
> diff --git a/libavcodec/vulkan/vc2_dwt_haar_subgroup.comp
> b/libavcodec/vulkan/vc2_dwt_haar_subgroup.comp
> new file mode 100644
> index 0000000000..81b0964271
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_dwt_haar_subgroup.comp
> @@ -0,0 +1,75 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_KHR_shader_subgroup_basic : require
> +#extension GL_KHR_shader_subgroup_shuffle : require
> +
> +#define TILE_DIM 8
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + int s;
> + int plane_idx;
> + int wavelet_depth;
> +};
> +
> +void main()
> +{
> + ivec2 tile_coord = ivec2(gl_WorkGroupID.xy);
> + ivec2 local_coord = ivec2(gl_LocalInvocationIndex & 7,
> gl_LocalInvocationIndex >> 3);
> + ivec2 coord = tile_coord * ivec2(TILE_DIM) + local_coord;
> +
> + int value = imageLoad(coef_buf[plane_idx], coord).x;
> + for (int i = 0; i < wavelet_depth; i++)
> + {
> + ivec2 mask = ivec2((1 << i) - 1);
> + if (any(notEqual(local_coord & mask, ivec2(0))))
> + break;
> +
> + /* Offset between valid hor pixels for each level, +1, +2, +4 etc */
> + int dist = (1 << i);
> +
> + /* Horizontal haar wavelet */
> + uint other_sub_id = gl_SubgroupInvocationID ^ dist;
> + int other = subgroupShuffle(value, other_sub_id);
> + int a = gl_SubgroupInvocationID < other_sub_id ? value : other;
> + int b = gl_SubgroupInvocationID < other_sub_id ? other : value;
> + int dst_b = (b - a) * (1 << s);
> + int dst_a = a * (1 << s) + ((dst_b + 1) >> 1);
> + value = gl_SubgroupInvocationID < other_sub_id ? dst_a : dst_b;
> +
> + /* Offset between valid ver pixels for each level, +1, +2, +4 etc */
> + dist <<= 3;
> +
> + /* Vertical haar wavelet */
> + other_sub_id = gl_SubgroupInvocationID ^ dist;
> + other = subgroupShuffle(value, other_sub_id);
> + a = gl_SubgroupInvocationID < other_sub_id ? value : other;
> + b = gl_SubgroupInvocationID < other_sub_id ? other : value;
> + dst_b = b - a;
> + dst_a = a + ((dst_b + 1) >> 1);
> + value = gl_SubgroupInvocationID < other_sub_id ? dst_a : dst_b;
> + }
> +
> + /* Store value */
> + imageStore(coef_buf[plane_idx], coord, ivec4(value));
> +}
> diff --git a/libavcodec/vulkan/vc2_dwt_hor_legall.comp
> b/libavcodec/vulkan/vc2_dwt_hor_legall.comp
> new file mode 100644
> index 0000000000..bada2ee1fd
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_dwt_hor_legall.comp
> @@ -0,0 +1,82 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_buffer_reference : require
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + int s;
> + int diff_offset;
> + int level;
> +};
> +
> +int image_load(int coord_x)
> +{
> + int coord_y = int(gl_GlobalInvocationID.x);
> + return imageLoad(coef_buf[gl_GlobalInvocationID.z], ivec2(coord_x,
> coord_y)).x;
> +}
> +
> +void image_store(int coord_x, int value)
> +{
> + int coord_y = int(gl_GlobalInvocationID.x);
> + imageStore(coef_buf[gl_GlobalInvocationID.z], ivec2(coord_x, coord_y),
> ivec4(value));
> +}
> +
> +void main()
> +{
> + int coord_y = int(gl_GlobalInvocationID.x);
> + uint plane_idx = gl_GlobalInvocationID.z;
> + ivec2 work_area = imageSize(coef_buf[plane_idx]);
> + int dist = 1 << level;
> + if (coord_y >= work_area.y || (coord_y & (dist - 1)) != 0)
> + return;
> +
> + // Shift in one bit that is used for additional precision
> + for (int x = 0; x < work_area.x; x += dist)
> + image_store(x, image_load(x) << 1);
> +
> + // Lifting stage 2
> + for (int x = 0; x < work_area.x - 2 * dist; x += 2 * dist) {
> + int lhs = image_load(x);
> + int rhs = image_load(x + 2 * dist);
> + int value = image_load(x + dist);
> + value -= (lhs + rhs + 1) >> 1;
> + image_store(x + dist, value);
> + }
> + int lhs = image_load(work_area.x - 2 * dist);
> + int value = image_load(work_area.x - dist);
> + value -= (2 * lhs + 1) >> 1;
> + image_store(work_area.x - dist, value);
> +
> + // Lifting stage 1
> + lhs = image_load(dist);
> + value = image_load(0);
> + value += (2 * lhs + 2) >> 2;
> + image_store(0, value);
> + for (int x = 2 * dist; x <= work_area.x - 2 * dist; x += 2 * dist) {
> + int lhs = image_load(x - dist);
> + int rhs = image_load(x + dist);
> + int value = image_load(x);
> + value += (lhs + rhs + 2) >> 2;
> + image_store(x, value);
> + }
> +}
> diff --git a/libavcodec/vulkan/vc2_dwt_upload.comp
> b/libavcodec/vulkan/vc2_dwt_upload.comp
> new file mode 100644
> index 0000000000..c758fd867f
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_dwt_upload.comp
> @@ -0,0 +1,96 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_shader_explicit_arithmetic_types : require
> +
> +#define AV_PIX_FMT_XV30 214
> +#define AV_PIX_FMT_XV36 216
> +#define AV_PIX_FMT_XV48 242
> +#define AV_PIX_FMT_P212 222
> +#define AV_PIX_FMT_P012 209
> +#define AV_PIX_FMT_P210 198
> +#define AV_PIX_FMT_P016 169
> +#define AV_PIX_FMT_P010 158
> +#define AV_PIX_FMT_NV16 101
> +#define AV_PIX_FMT_NV12 23
> +
> +#define Y 0
> +#define U 1
> +#define V 2
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + int s;
> + int diff_offset;
> + int level;
> +};
> +
> +uvec4 load_plane(uint plane_idx)
> +{
> + ivec2 coord = ivec2(gl_GlobalInvocationID.xy);
> + return imageLoad(src_planes[plane_idx], coord);
> +}
> +
> +void store_plane(uint plane_idx, uint value)
> +{
> + int result = int(value - diff_offset);
> + ivec2 coord = ivec2(gl_GlobalInvocationID.xy);
> + imageStore(coef_buf[plane_idx], coord, ivec4(result));
> +}
> +
> +void main()
> +{
> + uvec4 p0 = load_plane(0);
> +#if PLANE_FMT == AV_PIX_FMT_XV30
> + store_plane(Y, (p0.x >> 10) & 0x3FF);
> + store_plane(U, p0.x & 0x3FF);
> + store_plane(V, (p0.x >> 20) & 0x3FF);
> +#elif PLANE_FMT == AV_PIX_FMT_XV36
> + store_plane(Y, p0.y >> 4);
> + store_plane(U, p0.x >> 4);
> + store_plane(V, p0.z >> 4);
> +#elif PLANE_FMT == AV_PIX_FMT_NV12
> + uvec4 p1 = load_plane(1);
> + store_plane(Y, p0.x | p0.y << 8);
> + store_plane(U, p1.x);
> + store_plane(V, p1.y);
> +#elif PLANE_FMT == AV_PIX_FMT_NV16
> + uvec4 p1 = load_plane(1);
> + store_plane(Y, p0.x);
> + store_plane(U, p1.x);
> + store_plane(V, p1.y);
> +#elif PLANE_FMT == AV_PIX_FMT_P010 || PLANE_FMT == AV_PIX_FMT_P210
> + uvec4 p1 = load_plane(1);
> + store_plane(Y, p0.x >> 6);
> + store_plane(U, p1.x >> 6);
> + store_plane(V, p1.y >> 6);
> +#elif PLANE_FMT == AV_PIX_FMT_P012 || PLANE_FMT == AV_PIX_FMT_P212
> + uvec4 p1 = load_plane(1);
> + store_plane(Y, p0.x >> 4);
> + store_plane(U, p1.x >> 4);
> + store_plane(V, p1.y >> 4);
> +#else
> + store_plane(Y, p0.x);
> + store_plane(U, load_plane(1).x);
> + store_plane(V, load_plane(2).x);
> +#endif
> +}
> diff --git a/libavcodec/vulkan/vc2_dwt_ver_legall.comp
> b/libavcodec/vulkan/vc2_dwt_ver_legall.comp
> new file mode 100644
> index 0000000000..ca391cc8d8
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_dwt_ver_legall.comp
> @@ -0,0 +1,78 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_buffer_reference : require
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + int s;
> + int diff_offset;
> + int level;
> +};
> +
> +int image_load(int coord_y)
> +{
> + int coord_x = int(gl_GlobalInvocationID.x);
> + return imageLoad(coef_buf[gl_GlobalInvocationID.z], ivec2(coord_x,
> coord_y)).x;
> +}
> +
> +void image_store(int coord_y, int value)
> +{
> + int coord_x = int(gl_GlobalInvocationID.x);
> + imageStore(coef_buf[gl_GlobalInvocationID.z], ivec2(coord_x, coord_y),
> ivec4(value));
> +}
> +
> +void main()
> +{
> + int coord_x = int(gl_GlobalInvocationID.x);
> + uint plane_idx = gl_GlobalInvocationID.z;
> + ivec2 work_area = imageSize(coef_buf[plane_idx]);
> + int dist = 1 << level;
> + if (coord_x >= work_area.x || (coord_x & (dist - 1)) != 0)
> + return;
> +
> + // Lifting stage 2
> + for (int y = dist; y < work_area.y - 2 * dist; y += 2 * dist) {
> + int lhs = image_load(y - dist);
> + int rhs = image_load(y + dist);
> + int value = image_load(y);
> + value -= (lhs + rhs + 1) >> 1;
> + image_store(y, value);
> + }
> + int lhs = image_load(work_area.y - 2 * dist);
> + int value = image_load(work_area.y - dist);
> + value -= (2 * lhs + 1) >> 1;
> + image_store(work_area.y - dist, value);
> +
> + // Lifting stage 1
> + lhs = image_load(dist);
> + value = image_load(0);
> + value += (2 * lhs + 2) >> 2;
> + image_store(0, value);
> + for (int y = 2 * dist; y <= work_area.y - 2 * dist; y += 2 * dist) {
> + int lhs = image_load(y + dist);
> + int rhs = image_load(y - dist);
> + int value = image_load(y);
> + value += (lhs + rhs + 2) >> 2;
> + image_store(y, value);
> + }
> +}
> diff --git a/libavcodec/vulkan/vc2_encode.comp
> b/libavcodec/vulkan/vc2_encode.comp
> new file mode 100644
> index 0000000000..4d8adcca61
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_encode.comp
> @@ -0,0 +1,159 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_shader_explicit_arithmetic_types : require
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_buffer_reference : require
> +#extension GL_EXT_debug_printf : require
> +
> +#define MAX_DWT_LEVELS (5)
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + u8buf bytestream;
> + ivec2 num_slices;
> + int wavelet_depth;
> + int size_scaler;
> + int prefix_bytes;
> +};
> +
> +void put_vc2_ue_uint(inout PutBitContext pb, uint val)
> +{
> + uint32_t pbits = 1;
> + int bits = 1;
> +
> + ++val;
> +
> + while ((val >> 8) != 0)
> + {
> + pbits |= uint32_t(interleaved_ue_golomb_tab[val & 0xff]) << bits;
> + val >>= 8;
> + bits += 16;
> + }
> +
> + pbits |= uint32_t(top_interleaved_ue_golomb_tab[val]) << bits;
> + bits += golomb_len_tab[val];
> + put_bits(pb, bits, pbits);
> +}
> +
> +int quants[MAX_DWT_LEVELS][4];
> +
> +int subband_coord(int index, int h, int lvl)
> +{
> + int coord = index;
> + coord <<= 1;
> + coord |= h;
> + coord <<= (wavelet_depth-lvl-1);
> + return coord;
> +}
> +
> +void main()
> +{
> + int slice_index = int(gl_GlobalInvocationID.x);
> + int max_index = num_slices.x * num_slices.y;
> + if (slice_index >= max_index)
> + return;
> +
> + /* Step 2. Quantize and encode */
> + int pb_start = slice_args[slice_index].pb_start;
> + int workgroup_x = int(gl_WorkGroupSize.x);
> + for (int i = 0, index = workgroup_x - 1; i < gl_WorkGroupID.x; i++) {
> + pb_start += slice_args[index].pb_start + slice_args[index].bytes;
> + index += workgroup_x;
> + }
> + ivec2 slice_coord = ivec2(slice_index % num_slices.x, slice_index /
> num_slices.x);
> + int slice_bytes_max = slice_args[slice_index].bytes;
> + int quant_index = slice_args[slice_index].quant_idx;
> +
> + PutBitContext pb;
> + init_put_bits(pb, OFFBUF(u8buf, bytestream, pb_start), slice_bytes_max);
> +
> + for (int level = 0; level < wavelet_depth; level++)
> + for (int orientation = int(level > 0); orientation < 4;
> orientation++)
> + quants[level][orientation] = max(quant_index -
> lut_quant[level][orientation], 0);
> +
> + /* Write quant index for this slice */
> + put_bits(pb, 8, quant_index);
> +
> + /* Luma + 2 Chroma planes */
> + for (int p = 0; p < 3; p++)
> + {
> + int pad_s, pad_c;
> + int bytes_start = int32_t(put_bytes_count(pb));
> +
> + /* Save current location and write a zero value */
> + uint64_t write_ptr_start = pb.buf;
> + int bit_left_start = pb.bit_left;
> + put_bits(pb, 8, 0);
> +
> + ivec2 dwt_dim = imageSize(coef_buf[p]);
> + for (int level = 0; level < wavelet_depth; level++)
> + {
> + ivec2 band_size = dwt_dim >> (wavelet_depth - level);
> + for (int o = int(level > 0); o < 4; o++)
> + {
> + /* Encode subband */
> + int left = band_size.x * (slice_coord.x) / num_slices.x;
> + int right = band_size.x * (slice_coord.x+1) / num_slices.x;
> + int top = band_size.y * (slice_coord.y) / num_slices.y;
> + int bottom = band_size.y * (slice_coord.y+1) / num_slices.y;
> +
> + const int q_idx = quants[level][o];
> + const int qfactor = ff_dirac_qscale_tab[q_idx];
> +
> + const int yh = o >> 1;
> + const int xh = o & 1;
> +
> + for (int y = top; y < bottom; y++)
> + {
> + for (int x = left; x < right; x++)
> + {
> + int sx = subband_coord(x, xh, level);
> + int sy = subband_coord(y, yh, level);
> + int coef = imageLoad(coef_buf[p], ivec2(sx, sy)).x;
> + uint c_abs = uint(abs(coef));
> + c_abs = (c_abs << 2) / qfactor;
> + put_vc2_ue_uint(pb, c_abs);
> + if (c_abs != 0)
> + put_bits(pb, 1, int(coef < 0));
> + }
> + }
> + }
> + }
> + flush_put_bits(pb);
> + int bytes_len = int32_t(put_bytes_count(pb)) - bytes_start - 1;
> + if (p == 2)
> + {
> + int len_diff = slice_bytes_max - int32_t(put_bytes_count(pb));
> + pad_s = align((bytes_len + len_diff), size_scaler)/size_scaler;
> + pad_c = (pad_s*size_scaler) - bytes_len;
> + }
> + else
> + {
> + pad_s = align(bytes_len, size_scaler)/size_scaler;
> + pad_c = (pad_s*size_scaler) - bytes_len;
> + }
> + uint64_t start_ptr = write_ptr_start + ((BUF_BITS - bit_left_start)
> >> 3);
> + u8buf(start_ptr).v = uint8_t(pad_s);
> + /* vc2-reference uses that padding that decodes to '0' coeffs */
> + skip_put_bytes(pb, pad_c);
> + }
> +}
> diff --git a/libavcodec/vulkan/vc2_slice_sizes.comp
> b/libavcodec/vulkan/vc2_slice_sizes.comp
> new file mode 100644
> index 0000000000..61070c1dc2
> --- /dev/null
> +++ b/libavcodec/vulkan/vc2_slice_sizes.comp
> @@ -0,0 +1,170 @@
> +/*
> + * VC2 codec
> + *
> + * Copyright (c) 2025 raphaelthegreat <geoste...@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
> + */
> +
> +#extension GL_EXT_shader_explicit_arithmetic_types : require
> +#extension GL_EXT_scalar_block_layout : require
> +#extension GL_EXT_buffer_reference : require
> +
> +#define DIRAC_MAX_QUANT_INDEX 116
> +#define MAX_DWT_LEVELS 5
> +
> +layout(push_constant, scalar) uniform ComputeInfo {
> + ivec2 num_slices;
> + int wavelet_depth;
> + int size_scaler;
> + int prefix_bytes;
> + int bits_ceil;
> + int bits_floor;
> +};
> +
> +int count_vc2_ue_uint(uint val)
> +{
> + return 2 * findMSB(val + 1) + 1;
> +}
> +
> +int cache[DIRAC_MAX_QUANT_INDEX];
> +int quants[MAX_DWT_LEVELS][4];
> +shared int slice_sizes[gl_WorkGroupSize.x];
> +
> +int subband_coord(int index, int h, int lvl)
> +{
> + int coord = index;
> + coord <<= 1;
> + coord |= h;
> + coord <<= (wavelet_depth-lvl-1);
> + return coord;
> +}
> +
> +int count_hq_slice(int quant_index)
> +{
> + int bits = 0;
> + if (cache[quant_index] != 0)
> + return cache[quant_index];
> +
> + bits += 8*prefix_bytes;
> + bits += 8; /* quant_idx */
> +
> + for (int level = 0; level < wavelet_depth; level++)
> + for (int orientation = int(level > 0); orientation < 4;
> orientation++)
> + quants[level][orientation] = max(quant_index -
> lut_quant[level][orientation], 0);
> +
> + int slice_index = int(gl_GlobalInvocationID.x);
> + ivec2 slice_coord = ivec2(slice_index % num_slices.x, slice_index /
> num_slices.x);
> + for (int p = 0; p < 3; p++)
> + {
> + int bytes_start = bits >> 3;
> + bits += 8;
> +
> + ivec2 dwt_dim = imageSize(coef_buf[p]);
> + for (int level = 0; level < wavelet_depth; level++)
> + {
> + ivec2 band_dim = dwt_dim >> (wavelet_depth - level);
> + for (int o = int(level > 0); o < 4; o++)
> + {
> + const int left = band_dim.x * slice_coord.x / num_slices.x;
> + const int right = band_dim.x * (slice_coord.x+1) /
> num_slices.x;
> + const int top = band_dim.y * slice_coord.y / num_slices.y;
> + const int bottom = band_dim.y * (slice_coord.y+1) /
> num_slices.y;
> +
> + const int q_idx = quants[level][o];
> + const int qfactor = ff_dirac_qscale_tab[q_idx];
> +
> + const int yh = o >> 1;
> + const int xh = o & 1;
> +
> + for (int y = top; y < bottom; y++)
> + {
> + for (int x = left; x < right; x++)
> + {
> + int sx = subband_coord(x, xh, level);
> + int sy = subband_coord(y, yh, level);
> + int coef = imageLoad(coef_buf[p], ivec2(sx, sy)).x;
> + uint c_abs = uint(abs(coef));
> + c_abs = (c_abs << 2) / qfactor;
> + bits += count_vc2_ue_uint(c_abs);
> + bits += int(c_abs > 0);
> + }
> + }
> + }
> + }
> + bits += align(bits, 8) - bits;
> + int bytes_len = (bits >> 3) - bytes_start - 1;
> + int pad_s = align(bytes_len, size_scaler) / size_scaler;
> + int pad_c = (pad_s * size_scaler) - bytes_len;
> + bits += pad_c * 8;
> + }
> +
> + cache[quant_index] = bits;
> + return bits;
> +}
> +
> +int ssize_round(int b)
> +{
> + return align(b, size_scaler) + 4 + prefix_bytes;
> +}
> +
> +void main()
> +{
> + int slice_index = int(gl_GlobalInvocationID.x);
> + int max_index = num_slices.x * num_slices.y;
> + if (slice_index >= max_index)
> + return;
> +
> + for (int i = 0; i < DIRAC_MAX_QUANT_INDEX; i++)
> + cache[i] = 0;
> +
> + const int q_ceil = DIRAC_MAX_QUANT_INDEX;
> + const int top = bits_ceil;
> + const int bottom = bits_floor;
> + int quant_buf[2] = int[2](-1, -1);
> + int quant = slice_args[slice_index].quant_idx;
> + int step = 1;
> + int bits_last = 0;
> + int bits = count_hq_slice(quant);
> + while ((bits > top) || (bits < bottom))
> + {
> + const int signed_step = bits > top ? +step : -step;
> + quant = clamp(quant + signed_step, 0, q_ceil-1);
> + bits = count_hq_slice(quant);
> + if (quant_buf[1] == quant)
> + {
> + quant = max(quant_buf[0], quant);
> + bits = quant == quant_buf[0] ? bits_last : bits;
> + break;
> + }
> + step = clamp(step / 2, 1, (q_ceil - 1) / 2);
> + quant_buf[1] = quant_buf[0];
> + quant_buf[0] = quant;
> + bits_last = bits;
> + }
> + int bytes = ssize_round(bits >> 3);
> + slice_args[slice_index].quant_idx = clamp(quant, 0, q_ceil-1);
> + slice_args[slice_index].bytes = bytes;
> + slice_sizes[gl_LocalInvocationIndex] = bytes;
> + barrier();
> +
> + /* Prefix sum for all slices in current workgroup */
> + int total_bytes = 0;
> + for (int i = 0; i < gl_LocalInvocationIndex; i++)
> + total_bytes += slice_sizes[i];
> + slice_args[slice_index].pb_start = total_bytes;
> +}
> --
> 2.49.0
>
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