--- /dev/null
+From 5e154b0357829007566930846f880b9f5fb404d9 Mon Sep 17 00:00:00 2001
+From: Jonas Karlman <jonas@kwiboo.se>
+Date: Mon, 3 Dec 2018 23:48:04 +0100
+Subject: [PATCH] avutil: add av_buffer_pool_flush()
+
+Used by V4L2 request API hwaccel
+
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ libavutil/buffer.c | 13 +++++++++++++
+ libavutil/buffer.h | 5 +++++
+ 2 files changed, 18 insertions(+)
+
+diff --git a/libavutil/buffer.c b/libavutil/buffer.c
+index 38a554208a90..b0fedabc3e7d 100644
+--- a/libavutil/buffer.c
++++ b/libavutil/buffer.c
+@@ -273,6 +273,19 @@ static void buffer_pool_free(AVBufferPool *pool)
+ av_freep(&pool);
+ }
+
++void av_buffer_pool_flush(AVBufferPool *pool)
++{
++ ff_mutex_lock(&pool->mutex);
++ while (pool->pool) {
++ BufferPoolEntry *buf = pool->pool;
++ pool->pool = buf->next;
++
++ buf->free(buf->opaque, buf->data);
++ av_freep(&buf);
++ }
++ ff_mutex_unlock(&pool->mutex);
++}
++
+ void av_buffer_pool_uninit(AVBufferPool **ppool)
+ {
+ AVBufferPool *pool;
+diff --git a/libavutil/buffer.h b/libavutil/buffer.h
+index c0f3f6cc9abe..998beec9ac5b 100644
+--- a/libavutil/buffer.h
++++ b/libavutil/buffer.h
+@@ -267,6 +267,11 @@ AVBufferPool *av_buffer_pool_init2(int size, void *opaque,
+ AVBufferRef* (*alloc)(void *opaque, int size),
+ void (*pool_free)(void *opaque));
+
++/**
++ * Free all available buffers in a buffer pool.
++ */
++ void av_buffer_pool_flush(AVBufferPool *pool);
++
+ /**
+ * Mark the pool as being available for freeing. It will actually be freed only
+ * once all the allocated buffers associated with the pool are released. Thus it
+From 01319970d90ffd3c073b054a3d2e4784f6ebea0d Mon Sep 17 00:00:00 2001
+From: Jonas Karlman <jonas@kwiboo.se>
+Date: Sat, 15 Dec 2018 22:32:16 +0100
+Subject: [PATCH] Add common V4L2 request API code
+
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ configure | 12 +
+ libavcodec/Makefile | 1 +
+ libavcodec/hwconfig.h | 2 +
+ libavcodec/v4l2_request.c | 984 ++++++++++++++++++++++++++++++++++++++
+ libavcodec/v4l2_request.h | 77 +++
+ 5 files changed, 1076 insertions(+)
+ create mode 100644 libavcodec/v4l2_request.c
+ create mode 100644 libavcodec/v4l2_request.h
+
+diff --git a/configure b/configure
+index 8569a60bf827..9f9909a23696 100755
+--- a/configure
++++ b/configure
+@@ -274,6 +274,7 @@ External library support:
+ --enable-libtls enable LibreSSL (via libtls), needed for https support
+ if openssl, gnutls or mbedtls is not used [no]
+ --enable-libtwolame enable MP2 encoding via libtwolame [no]
++ --enable-libudev enable libudev [no]
+ --enable-libv4l2 enable libv4l2/v4l-utils [no]
+ --enable-libvidstab enable video stabilization using vid.stab [no]
+ --enable-libvmaf enable vmaf filter via libvmaf [no]
+@@ -342,6 +343,7 @@ External library support:
+ --enable-omx-rpi enable OpenMAX IL code for Raspberry Pi [no]
+ --enable-rkmpp enable Rockchip Media Process Platform code [no]
+ --disable-v4l2-m2m disable V4L2 mem2mem code [autodetect]
++ --enable-v4l2-request enable V4L2 request API code [no]
+ --disable-vaapi disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
+ --disable-vdpau disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
+ --disable-videotoolbox disable VideoToolbox code [autodetect]
+@@ -1807,6 +1809,7 @@ EXTERNAL_LIBRARY_LIST="
+ libtesseract
+ libtheora
+ libtwolame
++ libudev
+ libv4l2
+ libvorbis
+ libvpx
+@@ -1861,6 +1864,7 @@ HWACCEL_LIBRARY_LIST="
+ mmal
+ omx
+ opencl
++ v4l2_request
+ vulkan
+ "
+
+@@ -2903,6 +2907,7 @@ d3d11va_deps="dxva_h ID3D11VideoDecoder ID3D11VideoContext"
+ dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32 user32"
+ ffnvcodec_deps_any="libdl LoadLibrary"
+ nvdec_deps="ffnvcodec"
++v4l2_request_deps="linux_videodev2_h linux_media_h v4l2_timeval_to_ns libdrm libudev"
+ vaapi_x11_deps="xlib"
+ videotoolbox_hwaccel_deps="videotoolbox pthreads"
+ videotoolbox_hwaccel_extralibs="-framework QuartzCore"
+@@ -6376,6 +6381,7 @@ enabled libtls && require_pkg_config libtls libtls tls.h tls_configur
+ enabled libtwolame && require libtwolame twolame.h twolame_init -ltwolame &&
+ { check_lib libtwolame twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
+ die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
++enabled libudev && require_pkg_config libudev libudev libudev.h udev_new
+ enabled libv4l2 && require_pkg_config libv4l2 libv4l2 libv4l2.h v4l2_ioctl
+ enabled libvidstab && require_pkg_config libvidstab "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
+ enabled libvmaf && require_pkg_config libvmaf "libvmaf >= 1.3.9" libvmaf.h compute_vmaf
+@@ -6475,6 +6481,10 @@ enabled rkmpp && { require_pkg_config rkmpp rockchip_mpp rockchip/r
+ { enabled libdrm ||
+ die "ERROR: rkmpp requires --enable-libdrm"; }
+ }
++enabled v4l2_request && { enabled libdrm ||
++ die "ERROR: v4l2-request requires --enable-libdrm"; } &&
++ { enabled libudev ||
++ die "ERROR: v4l2-request requires --enable-libudev"; }
+ enabled vapoursynth && require_pkg_config vapoursynth "vapoursynth-script >= 42" VSScript.h vsscript_init
+
+
+@@ -6556,6 +6566,8 @@ if enabled v4l2_m2m; then
+ check_cc vp9_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;"
+ fi
+
++check_func_headers "linux/media.h linux/videodev2.h" v4l2_timeval_to_ns
++
+ check_headers sys/videoio.h
+ test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+
+diff --git a/libavcodec/Makefile b/libavcodec/Makefile
+index 5a6ea59715af..d74220516826 100644
+--- a/libavcodec/Makefile
++++ b/libavcodec/Makefile
+@@ -153,6 +153,7 @@ OBJS-$(CONFIG_VP3DSP) += vp3dsp.o
+ OBJS-$(CONFIG_VP56DSP) += vp56dsp.o
+ OBJS-$(CONFIG_VP8DSP) += vp8dsp.o
+ OBJS-$(CONFIG_V4L2_M2M) += v4l2_m2m.o v4l2_context.o v4l2_buffers.o v4l2_fmt.o
++OBJS-$(CONFIG_V4L2_REQUEST) += v4l2_request.o
+ OBJS-$(CONFIG_WMA_FREQS) += wma_freqs.o
+ OBJS-$(CONFIG_WMV2DSP) += wmv2dsp.o
+
+diff --git a/libavcodec/hwconfig.h b/libavcodec/hwconfig.h
+index f421dc909f44..ee78d8ab8e89 100644
+--- a/libavcodec/hwconfig.h
++++ b/libavcodec/hwconfig.h
+@@ -80,6 +80,8 @@ typedef struct AVCodecHWConfigInternal {
+ HW_CONFIG_HWACCEL(0, 0, 1, D3D11VA_VLD, NONE, ff_ ## codec ## _d3d11va_hwaccel)
+ #define HWACCEL_XVMC(codec) \
+ HW_CONFIG_HWACCEL(0, 0, 1, XVMC, NONE, ff_ ## codec ## _xvmc_hwaccel)
++#define HWACCEL_V4L2REQUEST(codec) \
++ HW_CONFIG_HWACCEL(1, 0, 0, DRM_PRIME, DRM, ff_ ## codec ## _v4l2request_hwaccel)
+
+ #define HW_CONFIG_ENCODER(device, frames, ad_hoc, format, device_type_) \
+ &(const AVCodecHWConfigInternal) { \
+diff --git a/libavcodec/v4l2_request.c b/libavcodec/v4l2_request.c
+new file mode 100644
+index 000000000000..5234b5049b0d
+--- /dev/null
++++ b/libavcodec/v4l2_request.c
+@@ -0,0 +1,984 @@
++/*
++ * 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 <drm_fourcc.h>
++#include <linux/media.h>
++#include <sys/mman.h>
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++
++#include <sys/sysmacros.h>
++#include <libudev.h>
++
++#include "decode.h"
++#include "internal.h"
++#include "v4l2_request.h"
++
++uint64_t ff_v4l2_request_get_capture_timestamp(AVFrame *frame)
++{
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
++ return req ? v4l2_timeval_to_ns(&req->capture.buffer.timestamp) : 0;
++}
++
++int ff_v4l2_request_reset_frame(AVCodecContext *avctx, AVFrame *frame)
++{
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
++ memset(&req->drm, 0, sizeof(AVDRMFrameDescriptor));
++ req->output.used = 0;
++ return 0;
++}
++
++int ff_v4l2_request_append_output_buffer(AVCodecContext *avctx, AVFrame *frame, const uint8_t *data, uint32_t size)
++{
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
++ if (req->output.used + size + (AV_INPUT_BUFFER_PADDING_SIZE * 4) <= req->output.size) {
++ memcpy(req->output.addr + req->output.used, data, size);
++ req->output.used += size;
++ } else {
++ av_log(avctx, AV_LOG_ERROR, "%s: output.used=%u output.size=%u size=%u\n", __func__, req->output.used, req->output.size, size);
++ }
++ return 0;
++}
++
++static int v4l2_request_controls(V4L2RequestContext *ctx, int request_fd, unsigned long type, struct v4l2_ext_control *control, int count)
++{
++ struct v4l2_ext_controls controls = {
++ .controls = control,
++ .count = count,
++ .request_fd = request_fd,
++ .which = (request_fd >= 0) ? V4L2_CTRL_WHICH_REQUEST_VAL : 0,
++ };
++
++ if (!control || !count)
++ return 0;
++
++ return ioctl(ctx->video_fd, type, &controls);
++}
++
++static int v4l2_request_set_controls(V4L2RequestContext *ctx, int request_fd, struct v4l2_ext_control *control, int count)
++{
++ return v4l2_request_controls(ctx, request_fd, VIDIOC_S_EXT_CTRLS, control, count);
++}
++
++int ff_v4l2_request_set_controls(AVCodecContext *avctx, struct v4l2_ext_control *control, int count)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++
++ ret = v4l2_request_controls(ctx, -1, VIDIOC_S_EXT_CTRLS, control, count);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: set controls failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return AVERROR(EINVAL);
++ }
++
++ return ret;
++}
++
++int ff_v4l2_request_get_controls(AVCodecContext *avctx, struct v4l2_ext_control *control, int count)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++
++ ret = v4l2_request_controls(ctx, -1, VIDIOC_G_EXT_CTRLS, control, count);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get controls failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return AVERROR(EINVAL);
++ }
++
++ return ret;
++}
++
++int ff_v4l2_request_query_control(AVCodecContext *avctx, struct v4l2_query_ext_ctrl *control)
++{
++ int ret;
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++
++ ret = ioctl(ctx->video_fd, VIDIOC_QUERY_EXT_CTRL, control);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: query control failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return AVERROR(EINVAL);
++ }
++
++ return 0;
++}
++
++int ff_v4l2_request_query_control_default_value(AVCodecContext *avctx, uint32_t id)
++{
++ int ret;
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ struct v4l2_queryctrl control = {
++ .id = id,
++ };
++
++ ret = ioctl(ctx->video_fd, VIDIOC_QUERYCTRL, &control);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: query control failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return AVERROR(EINVAL);
++ }
++
++ return control.default_value;
++}
++
++static int v4l2_request_queue_buffer(V4L2RequestContext *ctx, int request_fd, V4L2RequestBuffer *buf, uint32_t flags)
++{
++ struct v4l2_plane planes[1] = {};
++ struct v4l2_buffer buffer = {
++ .type = buf->buffer.type,
++ .memory = buf->buffer.memory,
++ .index = buf->index,
++ .timestamp.tv_usec = ctx->timestamp,
++ .bytesused = buf->used,
++ .request_fd = request_fd,
++ .flags = ((request_fd >= 0) ? V4L2_BUF_FLAG_REQUEST_FD : 0) | flags,
++ };
++
++ buf->buffer.timestamp = buffer.timestamp;
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(buf->buffer.type)) {
++ planes[0].bytesused = buf->used;
++ buffer.bytesused = 0;
++ buffer.length = 1;
++ buffer.m.planes = planes;
++ }
++
++ return ioctl(ctx->video_fd, VIDIOC_QBUF, &buffer);
++}
++
++static int v4l2_request_dequeue_buffer(V4L2RequestContext *ctx, V4L2RequestBuffer *buf)
++{
++ int ret;
++ struct v4l2_plane planes[1] = {};
++ struct v4l2_buffer buffer = {
++ .type = buf->buffer.type,
++ .memory = buf->buffer.memory,
++ .index = buf->index,
++ };
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(buf->buffer.type)) {
++ buffer.length = 1;
++ buffer.m.planes = planes;
++ }
++
++ ret = ioctl(ctx->video_fd, VIDIOC_DQBUF, &buffer);
++ if (ret < 0)
++ return ret;
++
++ buf->buffer.timestamp = buffer.timestamp;
++ return 0;
++}
++
++const uint32_t v4l2_request_capture_pixelformats[] = {
++ V4L2_PIX_FMT_NV12,
++#ifdef DRM_FORMAT_MOD_ALLWINNER_TILED
++ V4L2_PIX_FMT_SUNXI_TILED_NV12,
++#endif
++};
++
++static int v4l2_request_set_drm_descriptor(V4L2RequestDescriptor *req, struct v4l2_format *format)
++{
++ AVDRMFrameDescriptor *desc = &req->drm;
++ AVDRMLayerDescriptor *layer = &desc->layers[0];
++ uint32_t pixelformat = V4L2_TYPE_IS_MULTIPLANAR(format->type) ? format->fmt.pix_mp.pixelformat : format->fmt.pix.pixelformat;
++
++ switch (pixelformat) {
++ case V4L2_PIX_FMT_NV12:
++ layer->format = DRM_FORMAT_NV12;
++ desc->objects[0].format_modifier = DRM_FORMAT_MOD_LINEAR;
++ break;
++#ifdef DRM_FORMAT_MOD_ALLWINNER_TILED
++ case V4L2_PIX_FMT_SUNXI_TILED_NV12:
++ layer->format = DRM_FORMAT_NV12;
++ desc->objects[0].format_modifier = DRM_FORMAT_MOD_ALLWINNER_TILED;
++ break;
++#endif
++ default:
++ return -1;
++ }
++
++ desc->nb_objects = 1;
++ desc->objects[0].fd = req->capture.fd;
++ desc->objects[0].size = req->capture.size;
++
++ desc->nb_layers = 1;
++ layer->nb_planes = 2;
++
++ layer->planes[0].object_index = 0;
++ layer->planes[0].offset = 0;
++ layer->planes[0].pitch = V4L2_TYPE_IS_MULTIPLANAR(format->type) ? format->fmt.pix_mp.plane_fmt[0].bytesperline : format->fmt.pix.bytesperline;
++
++ layer->planes[1].object_index = 0;
++ layer->planes[1].offset = layer->planes[0].pitch * (V4L2_TYPE_IS_MULTIPLANAR(format->type) ? format->fmt.pix_mp.height : format->fmt.pix.height);
++ layer->planes[1].pitch = layer->planes[0].pitch;
++
++ return 0;
++}
++
++static int v4l2_request_queue_decode(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count, int first_slice, int last_slice)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
++ struct timeval tv = { 2, 0 };
++ fd_set except_fds;
++ int ret;
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p used=%u controls=%d index=%d fd=%d request_fd=%d first_slice=%d last_slice=%d\n", __func__, avctx, req->output.used, count, req->capture.index, req->capture.fd, req->request_fd, first_slice, last_slice);
++
++ if (first_slice)
++ ctx->timestamp++;
++
++ ret = v4l2_request_set_controls(ctx, req->request_fd, control, count);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: set controls failed for request %d, %s (%d)\n", __func__, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++
++ memset(req->output.addr + req->output.used, 0, AV_INPUT_BUFFER_PADDING_SIZE * 4);
++
++ ret = v4l2_request_queue_buffer(ctx, req->request_fd, &req->output, last_slice ? 0 : V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: queue output buffer %d failed for request %d, %s (%d)\n", __func__, req->output.index, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++
++ if (first_slice) {
++ ret = v4l2_request_queue_buffer(ctx, -1, &req->capture, 0);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: queue capture buffer %d failed for request %d, %s (%d)\n", __func__, req->capture.index, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++ }
++
++ // NOTE: do we need to dequeue when request fails/timeout?
++
++ // 4. queue request and wait
++ ret = ioctl(req->request_fd, MEDIA_REQUEST_IOC_QUEUE, NULL);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: queue request %d failed, %s (%d)\n", __func__, req->request_fd, strerror(errno), errno);
++ goto fail;
++ }
++
++ FD_ZERO(&except_fds);
++ FD_SET(req->request_fd, &except_fds);
++
++ ret = select(req->request_fd + 1, NULL, NULL, &except_fds, &tv);
++ if (ret == 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: request %d timeout\n", __func__, req->request_fd);
++ goto fail;
++ } else if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: select request %d failed, %s (%d)\n", __func__, req->request_fd, strerror(errno), errno);
++ goto fail;
++ }
++
++ ret = v4l2_request_dequeue_buffer(ctx, &req->output);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: dequeue output buffer %d failed for request %d, %s (%d)\n", __func__, req->output.index, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++
++ if (last_slice) {
++ ret = v4l2_request_dequeue_buffer(ctx, &req->capture);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: dequeue capture buffer %d failed for request %d, %s (%d)\n", __func__, req->capture.index, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++ }
++
++ // TODO: check errors
++ // buffer.flags & V4L2_BUF_FLAG_ERROR
++
++ ret = ioctl(req->request_fd, MEDIA_REQUEST_IOC_REINIT, NULL);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: reinit request %d failed, %s (%d)\n", __func__, req->request_fd, strerror(errno), errno);
++ return -1;
++ }
++
++ if (last_slice)
++ return v4l2_request_set_drm_descriptor(req, &ctx->format);
++
++ return 0;
++
++fail:
++ ret = v4l2_request_dequeue_buffer(ctx, &req->output);
++ if (ret < 0)
++ av_log(avctx, AV_LOG_ERROR, "%s: dequeue output buffer %d failed for request %d, %s (%d)\n", __func__, req->output.index, req->request_fd, strerror(errno), errno);
++
++ ret = v4l2_request_dequeue_buffer(ctx, &req->capture);
++ if (ret < 0)
++ av_log(avctx, AV_LOG_ERROR, "%s: dequeue capture buffer %d failed for request %d, %s (%d)\n", __func__, req->capture.index, req->request_fd, strerror(errno), errno);
++
++ ret = ioctl(req->request_fd, MEDIA_REQUEST_IOC_REINIT, NULL);
++ if (ret < 0)
++ av_log(avctx, AV_LOG_ERROR, "%s: reinit request %d failed, %s (%d)\n", __func__, req->request_fd, strerror(errno), errno);
++
++ return -1;
++}
++
++int ff_v4l2_request_decode_slice(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count, int first_slice, int last_slice)
++{
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
++
++ // fall back to queue each slice as a full frame
++ if ((req->output.capabilities & V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF) != V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF)
++ return v4l2_request_queue_decode(avctx, frame, control, count, 1, 1);
++
++ return v4l2_request_queue_decode(avctx, frame, control, count, first_slice, last_slice);
++}
++
++int ff_v4l2_request_decode_frame(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count)
++{
++ return v4l2_request_queue_decode(avctx, frame, control, count, 1, 1);
++}
++
++static int v4l2_request_try_format(AVCodecContext *avctx, enum v4l2_buf_type type, uint32_t pixelformat)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ struct v4l2_fmtdesc fmtdesc = {
++ .index = 0,
++ .type = type,
++ };
++
++ if (V4L2_TYPE_IS_OUTPUT(type)) {
++ struct v4l2_create_buffers buffers = {
++ .count = 0,
++ .memory = V4L2_MEMORY_MMAP,
++ .format.type = type,
++ };
++
++ if (ioctl(ctx->video_fd, VIDIOC_CREATE_BUFS, &buffers) < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: create buffers failed for type %u, %s (%d)\n", __func__, type, strerror(errno), errno);
++ return -1;
++ }
++
++ if ((buffers.capabilities & V4L2_BUF_CAP_SUPPORTS_REQUESTS) != V4L2_BUF_CAP_SUPPORTS_REQUESTS) {
++ av_log(avctx, AV_LOG_INFO, "%s: output buffer type do not support requests, capabilities %u\n", __func__, buffers.capabilities);
++ return -1;
++ }
++ }
++
++ while (ioctl(ctx->video_fd, VIDIOC_ENUM_FMT, &fmtdesc) >= 0) {
++ if (fmtdesc.pixelformat == pixelformat)
++ return 0;
++
++ fmtdesc.index++;
++ }
++
++ av_log(avctx, AV_LOG_INFO, "%s: pixelformat %u not supported for type %u\n", __func__, pixelformat, type);
++ return -1;
++}
++
++static int v4l2_request_set_format(AVCodecContext *avctx, enum v4l2_buf_type type, uint32_t pixelformat, uint32_t buffersize)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ struct v4l2_format format = {
++ .type = type,
++ };
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
++ format.fmt.pix_mp.width = avctx->coded_width;
++ format.fmt.pix_mp.height = avctx->coded_height;
++ format.fmt.pix_mp.pixelformat = pixelformat;
++ format.fmt.pix_mp.plane_fmt[0].sizeimage = buffersize;
++ format.fmt.pix_mp.num_planes = 1;
++ } else {
++ format.fmt.pix.width = avctx->coded_width;
++ format.fmt.pix.height = avctx->coded_height;
++ format.fmt.pix.pixelformat = pixelformat;
++ format.fmt.pix.sizeimage = buffersize;
++ }
++
++ return ioctl(ctx->video_fd, VIDIOC_S_FMT, &format);
++}
++
++static int v4l2_request_select_capture_format(AVCodecContext *avctx)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ enum v4l2_buf_type type = ctx->format.type;
++
++#if 0
++ struct v4l2_format format = {
++ .type = type,
++ };
++ struct v4l2_fmtdesc fmtdesc = {
++ .index = 0,
++ .type = type,
++ };
++ uint32_t pixelformat;
++ int i;
++
++ if (ioctl(ctx->video_fd, VIDIOC_G_FMT, &format) < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get capture format failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return -1;
++ }
++
++ pixelformat = V4L2_TYPE_IS_MULTIPLANAR(type) ? format.fmt.pix_mp.pixelformat : format.fmt.pix.pixelformat;
++
++ for (i = 0; i < FF_ARRAY_ELEMS(v4l2_request_capture_pixelformats); i++) {
++ if (pixelformat == v4l2_request_capture_pixelformats[i])
++ return v4l2_request_set_format(avctx, type, pixelformat, 0);
++ }
++
++ while (ioctl(ctx->video_fd, VIDIOC_ENUM_FMT, &fmtdesc) >= 0) {
++ for (i = 0; i < FF_ARRAY_ELEMS(v4l2_request_capture_pixelformats); i++) {
++ if (fmtdesc.pixelformat == v4l2_request_capture_pixelformats[i])
++ return v4l2_request_set_format(avctx, type, fmtdesc.pixelformat, 0);
++ }
++
++ fmtdesc.index++;
++ }
++#else
++ for (int i = 0; i < FF_ARRAY_ELEMS(v4l2_request_capture_pixelformats); i++) {
++ uint32_t pixelformat = v4l2_request_capture_pixelformats[i];
++ if (!v4l2_request_try_format(avctx, type, pixelformat))
++ return v4l2_request_set_format(avctx, type, pixelformat, 0);
++ }
++#endif
++
++ return -1;
++}
++
++static int v4l2_request_probe_video_device(struct udev_device *device, AVCodecContext *avctx, uint32_t pixelformat, uint32_t buffersize, struct v4l2_ext_control *control, int count)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret = AVERROR(EINVAL);
++ struct v4l2_capability capability = {0};
++ unsigned int capabilities = 0;
++
++ const char *path = udev_device_get_devnode(device);
++ if (!path) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get video device devnode failed\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ctx->video_fd = open(path, O_RDWR | O_NONBLOCK, 0);
++ if (ctx->video_fd < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: opening %s failed, %s (%d)\n", __func__, path, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = ioctl(ctx->video_fd, VIDIOC_QUERYCAP, &capability);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get video capability failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ if (capability.capabilities & V4L2_CAP_DEVICE_CAPS)
++ capabilities = capability.device_caps;
++ else
++ capabilities = capability.capabilities;
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p ctx=%p path=%s capabilities=%u\n", __func__, avctx, ctx, path, capabilities);
++
++ if ((capabilities & V4L2_CAP_STREAMING) != V4L2_CAP_STREAMING) {
++ av_log(avctx, AV_LOG_ERROR, "%s: missing required streaming capability\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ if ((capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) == V4L2_CAP_VIDEO_M2M_MPLANE) {
++ ctx->output_type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
++ ctx->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
++ } else if ((capabilities & V4L2_CAP_VIDEO_M2M) == V4L2_CAP_VIDEO_M2M) {
++ ctx->output_type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
++ ctx->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
++ } else {
++ av_log(avctx, AV_LOG_ERROR, "%s: missing required mem2mem capability\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = v4l2_request_try_format(avctx, ctx->output_type, pixelformat);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_WARNING, "%s: try output format failed\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = v4l2_request_set_format(avctx, ctx->output_type, pixelformat, buffersize);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: set output format failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = v4l2_request_set_controls(ctx, -1, control, count);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: set controls failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = v4l2_request_select_capture_format(avctx);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_WARNING, "%s: select capture format failed\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ return 0;
++
++fail:
++ if (ctx->video_fd >= 0) {
++ close(ctx->video_fd);
++ ctx->video_fd = -1;
++ }
++ return ret;
++}
++
++static int v4l2_request_init_context(AVCodecContext *avctx)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++
++ ret = ioctl(ctx->video_fd, VIDIOC_G_FMT, &ctx->format);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get capture format failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(ctx->format.type)) {
++ av_log(avctx, AV_LOG_DEBUG, "%s: pixelformat=%d width=%u height=%u bytesperline=%u sizeimage=%u num_planes=%u\n", __func__, ctx->format.fmt.pix_mp.pixelformat, ctx->format.fmt.pix_mp.width, ctx->format.fmt.pix_mp.height, ctx->format.fmt.pix_mp.plane_fmt[0].bytesperline, ctx->format.fmt.pix_mp.plane_fmt[0].sizeimage, ctx->format.fmt.pix_mp.num_planes);
++ } else {
++ av_log(avctx, AV_LOG_DEBUG, "%s: pixelformat=%d width=%u height=%u bytesperline=%u sizeimage=%u\n", __func__, ctx->format.fmt.pix.pixelformat, ctx->format.fmt.pix.width, ctx->format.fmt.pix.height, ctx->format.fmt.pix.bytesperline, ctx->format.fmt.pix.sizeimage);
++ }
++
++ ret = ff_decode_get_hw_frames_ctx(avctx, AV_HWDEVICE_TYPE_DRM);
++ if (ret < 0)
++ goto fail;
++
++ ret = ioctl(ctx->video_fd, VIDIOC_STREAMON, &ctx->output_type);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: output stream on failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = ioctl(ctx->video_fd, VIDIOC_STREAMON, &ctx->format.type);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: capture stream on failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ return 0;
++
++fail:
++ ff_v4l2_request_uninit(avctx);
++ return ret;
++}
++
++static int v4l2_request_probe_media_device(struct udev_device *device, AVCodecContext *avctx, uint32_t pixelformat, uint32_t buffersize, struct v4l2_ext_control *control, int count)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++ struct media_device_info device_info = {0};
++ struct media_v2_topology topology = {0};
++ struct media_v2_interface *interfaces = NULL;
++ struct udev *udev = udev_device_get_udev(device);
++ struct udev_device *video_device;
++ dev_t devnum;
++
++ const char *path = udev_device_get_devnode(device);
++ if (!path) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get media device devnode failed\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ctx->media_fd = open(path, O_RDWR, 0);
++ if (ctx->media_fd < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: opening %s failed, %s (%d)\n", __func__, path, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = ioctl(ctx->media_fd, MEDIA_IOC_DEVICE_INFO, &device_info);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get media device info failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p ctx=%p path=%s driver=%s\n", __func__, avctx, ctx, path, device_info.driver);
++
++ ret = ioctl(ctx->media_fd, MEDIA_IOC_G_TOPOLOGY, &topology);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get media topology failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ if (topology.num_interfaces <= 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: media device has no interfaces\n", __func__);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ interfaces = av_mallocz(topology.num_interfaces * sizeof(struct media_v2_interface));
++ if (!interfaces) {
++ av_log(avctx, AV_LOG_ERROR, "%s: allocating media interface struct failed\n", __func__);
++ ret = AVERROR(ENOMEM);
++ goto fail;
++ }
++
++ topology.ptr_interfaces = (__u64)(uintptr_t)interfaces;
++ ret = ioctl(ctx->media_fd, MEDIA_IOC_G_TOPOLOGY, &topology);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get media topology failed, %s (%d)\n", __func__, strerror(errno), errno);
++ ret = AVERROR(EINVAL);
++ goto fail;
++ }
++
++ ret = AVERROR(EINVAL);
++ for (int i = 0; i < topology.num_interfaces; i++) {
++ if (interfaces[i].intf_type != MEDIA_INTF_T_V4L_VIDEO)
++ continue;
++
++ devnum = makedev(interfaces[i].devnode.major, interfaces[i].devnode.minor);
++ video_device = udev_device_new_from_devnum(udev, 'c', devnum);
++ if (!video_device) {
++ av_log(avctx, AV_LOG_ERROR, "%s: video_device=%p\n", __func__, video_device);
++ continue;
++ }
++
++ ret = v4l2_request_probe_video_device(video_device, avctx, pixelformat, buffersize, control, count);
++ udev_device_unref(video_device);
++
++ if (!ret)
++ break;
++ }
++
++ av_freep(&interfaces);
++ return ret;
++
++fail:
++ av_freep(&interfaces);
++ if (ctx->media_fd >= 0) {
++ close(ctx->media_fd);
++ ctx->media_fd = -1;
++ }
++ return ret;
++}
++
++int ff_v4l2_request_init(AVCodecContext *avctx, uint32_t pixelformat, uint32_t buffersize, struct v4l2_ext_control *control, int count)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret = AVERROR(EINVAL);
++ struct udev *udev;
++ struct udev_enumerate *enumerate;
++ struct udev_list_entry *devices;
++ struct udev_list_entry *entry;
++ struct udev_device *device;
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p hw_device_ctx=%p hw_frames_ctx=%p\n", __func__, avctx, avctx->hw_device_ctx, avctx->hw_frames_ctx);
++
++ ctx->media_fd = -1;
++ ctx->video_fd = -1;
++ ctx->timestamp = 0;
++
++ udev = udev_new();
++ if (!udev) {
++ av_log(avctx, AV_LOG_ERROR, "%s: allocating udev context failed\n", __func__);
++ ret = AVERROR(ENOMEM);
++ goto fail;
++ }
++
++ enumerate = udev_enumerate_new(udev);
++ if (!enumerate) {
++ av_log(avctx, AV_LOG_ERROR, "%s: allocating udev enumerator failed\n", __func__);
++ ret = AVERROR(ENOMEM);
++ goto fail;
++ }
++
++ udev_enumerate_add_match_subsystem(enumerate, "media");
++ udev_enumerate_scan_devices(enumerate);
++
++ devices = udev_enumerate_get_list_entry(enumerate);
++ udev_list_entry_foreach(entry, devices) {
++ const char *path = udev_list_entry_get_name(entry);
++ if (!path)
++ continue;
++
++ device = udev_device_new_from_syspath(udev, path);
++ if (!device)
++ continue;
++
++ ret = v4l2_request_probe_media_device(device, avctx, pixelformat, buffersize, control, count);
++ udev_device_unref(device);
++
++ if (!ret)
++ break;
++ }
++
++ udev_enumerate_unref(enumerate);
++
++ if (!ret)
++ ret = v4l2_request_init_context(avctx);
++
++fail:
++ udev_unref(udev);
++ return ret;
++}
++
++int ff_v4l2_request_uninit(AVCodecContext *avctx)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p ctx=%p\n", __func__, avctx, ctx);
++
++ if (ctx->video_fd >= 0) {
++ ret = ioctl(ctx->video_fd, VIDIOC_STREAMOFF, &ctx->output_type);
++ if (ret < 0)
++ av_log(avctx, AV_LOG_ERROR, "%s: output stream off failed, %s (%d)\n", __func__, strerror(errno), errno);
++
++ ret = ioctl(ctx->video_fd, VIDIOC_STREAMOFF, &ctx->format.type);
++ if (ret < 0)
++ av_log(avctx, AV_LOG_ERROR, "%s: capture stream off failed, %s (%d)\n", __func__, strerror(errno), errno);
++ }
++
++ if (avctx->hw_frames_ctx) {
++ AVHWFramesContext *hwfc = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
++ av_buffer_pool_flush(hwfc->pool);
++ }
++
++ if (ctx->video_fd >= 0)
++ close(ctx->video_fd);
++
++ if (ctx->media_fd >= 0)
++ close(ctx->media_fd);
++
++ return 0;
++}
++
++static int v4l2_request_buffer_alloc(AVCodecContext *avctx, V4L2RequestBuffer *buf, enum v4l2_buf_type type)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ int ret;
++ struct v4l2_plane planes[1] = {};
++ struct v4l2_create_buffers buffers = {
++ .count = 1,
++ .memory = V4L2_MEMORY_MMAP,
++ .format.type = type,
++ };
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p buf=%p type=%u\n", __func__, avctx, buf, type);
++
++ ret = ioctl(ctx->video_fd, VIDIOC_G_FMT, &buffers.format);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: get format failed for type %u, %s (%d)\n", __func__, type, strerror(errno), errno);
++ return ret;
++ }
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(buffers.format.type)) {
++ av_log(avctx, AV_LOG_DEBUG, "%s: pixelformat=%d width=%u height=%u bytesperline=%u sizeimage=%u num_planes=%u\n", __func__, buffers.format.fmt.pix_mp.pixelformat, buffers.format.fmt.pix_mp.width, buffers.format.fmt.pix_mp.height, buffers.format.fmt.pix_mp.plane_fmt[0].bytesperline, buffers.format.fmt.pix_mp.plane_fmt[0].sizeimage, buffers.format.fmt.pix_mp.num_planes);
++ } else {
++ av_log(avctx, AV_LOG_DEBUG, "%s: pixelformat=%d width=%u height=%u bytesperline=%u sizeimage=%u\n", __func__, buffers.format.fmt.pix.pixelformat, buffers.format.fmt.pix.width, buffers.format.fmt.pix.height, buffers.format.fmt.pix.bytesperline, buffers.format.fmt.pix.sizeimage);
++ }
++
++ ret = ioctl(ctx->video_fd, VIDIOC_CREATE_BUFS, &buffers);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: create buffers failed for type %u, %s (%d)\n", __func__, type, strerror(errno), errno);
++ return ret;
++ }
++
++ if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
++ buf->width = buffers.format.fmt.pix_mp.width;
++ buf->height = buffers.format.fmt.pix_mp.height;
++ buf->size = buffers.format.fmt.pix_mp.plane_fmt[0].sizeimage;
++ buf->buffer.length = 1;
++ buf->buffer.m.planes = planes;
++ } else {
++ buf->width = buffers.format.fmt.pix.width;
++ buf->height = buffers.format.fmt.pix.height;
++ buf->size = buffers.format.fmt.pix.sizeimage;
++ }
++
++ buf->index = buffers.index;
++ buf->capabilities = buffers.capabilities;
++ buf->used = 0;
++
++ buf->buffer.type = type;
++ buf->buffer.memory = V4L2_MEMORY_MMAP;
++ buf->buffer.index = buf->index;
++
++ ret = ioctl(ctx->video_fd, VIDIOC_QUERYBUF, &buf->buffer);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: query buffer %d failed, %s (%d)\n", __func__, buf->index, strerror(errno), errno);
++ return ret;
++ }
++
++ if (V4L2_TYPE_IS_OUTPUT(type)) {
++ void *addr = mmap(NULL, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED, ctx->video_fd, V4L2_TYPE_IS_MULTIPLANAR(type) ? buf->buffer.m.planes[0].m.mem_offset : buf->buffer.m.offset);
++ if (addr == MAP_FAILED) {
++ av_log(avctx, AV_LOG_ERROR, "%s: mmap failed, %s (%d)\n", __func__, strerror(errno), errno);
++ return -1;
++ }
++
++ buf->addr = (uint8_t*)addr;
++ } else {
++ struct v4l2_exportbuffer exportbuffer = {
++ .type = type,
++ .index = buf->index,
++ .flags = O_RDONLY,
++ };
++
++ ret = ioctl(ctx->video_fd, VIDIOC_EXPBUF, &exportbuffer);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: export buffer %d failed, %s (%d)\n", __func__, buf->index, strerror(errno), errno);
++ return ret;
++ }
++
++ buf->fd = exportbuffer.fd;
++ }
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: buf=%p index=%d fd=%d addr=%p width=%u height=%u size=%u\n", __func__, buf, buf->index, buf->fd, buf->addr, buf->width, buf->height, buf->size);
++ return 0;
++}
++
++static void v4l2_request_buffer_free(V4L2RequestBuffer *buf)
++{
++ av_log(NULL, AV_LOG_DEBUG, "%s: buf=%p index=%d fd=%d addr=%p width=%u height=%u size=%u\n", __func__, buf, buf->index, buf->fd, buf->addr, buf->width, buf->height, buf->size);
++
++ if (buf->addr)
++ munmap(buf->addr, buf->size);
++
++ if (buf->fd >= 0)
++ close(buf->fd);
++}
++
++static void v4l2_request_frame_free(void *opaque, uint8_t *data)
++{
++ AVCodecContext *avctx = opaque;
++ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)data;
++
++ av_log(NULL, AV_LOG_DEBUG, "%s: avctx=%p data=%p request_fd=%d\n", __func__, avctx, data, req->request_fd);
++
++ if (req->request_fd >= 0)
++ close(req->request_fd);
++
++ v4l2_request_buffer_free(&req->capture);
++ v4l2_request_buffer_free(&req->output);
++
++ av_free(data);
++}
++
++static AVBufferRef *v4l2_request_frame_alloc(void *opaque, int size)
++{
++ AVCodecContext *avctx = opaque;
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ V4L2RequestDescriptor *req;
++ AVBufferRef *ref;
++ uint8_t *data;
++ int ret;
++
++ data = av_mallocz(size);
++ if (!data)
++ return NULL;
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p size=%d data=%p\n", __func__, avctx, size, data);
++
++ ref = av_buffer_create(data, size, v4l2_request_frame_free, avctx, 0);
++ if (!ref) {
++ av_freep(&data);
++ return NULL;
++ }
++
++ req = (V4L2RequestDescriptor*)data;
++ req->request_fd = -1;
++ req->output.fd = -1;
++ req->capture.fd = -1;
++
++ ret = v4l2_request_buffer_alloc(avctx, &req->output, ctx->output_type);
++ if (ret < 0) {
++ av_buffer_unref(&ref);
++ return NULL;
++ }
++
++ ret = v4l2_request_buffer_alloc(avctx, &req->capture, ctx->format.type);
++ if (ret < 0) {
++ av_buffer_unref(&ref);
++ return NULL;
++ }
++
++ ret = ioctl(ctx->media_fd, MEDIA_IOC_REQUEST_ALLOC, &req->request_fd);
++ if (ret < 0) {
++ av_log(avctx, AV_LOG_ERROR, "%s: request alloc failed, %s (%d)\n", __func__, strerror(errno), errno);
++ av_buffer_unref(&ref);
++ return NULL;
++ }
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p size=%d data=%p request_fd=%d\n", __func__, avctx, size, data, req->request_fd);
++ return ref;
++}
++
++static void v4l2_request_pool_free(void *opaque)
++{
++ av_log(NULL, AV_LOG_DEBUG, "%s: opaque=%p\n", __func__, opaque);
++}
++
++static void v4l2_request_hwframe_ctx_free(AVHWFramesContext *hwfc)
++{
++ av_log(NULL, AV_LOG_DEBUG, "%s: hwfc=%p pool=%p\n", __func__, hwfc, hwfc->pool);
++
++ av_buffer_pool_flush(hwfc->pool);
++ av_buffer_pool_uninit(&hwfc->pool);
++}
++
++int ff_v4l2_request_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
++{
++ V4L2RequestContext *ctx = avctx->internal->hwaccel_priv_data;
++ AVHWFramesContext *hwfc = (AVHWFramesContext*)hw_frames_ctx->data;
++
++ hwfc->format = AV_PIX_FMT_DRM_PRIME;
++ hwfc->sw_format = AV_PIX_FMT_NV12;
++ if (V4L2_TYPE_IS_MULTIPLANAR(ctx->format.type)) {
++ hwfc->width = ctx->format.fmt.pix_mp.width;
++ hwfc->height = ctx->format.fmt.pix_mp.height;
++ } else {
++ hwfc->width = ctx->format.fmt.pix.width;
++ hwfc->height = ctx->format.fmt.pix.height;
++ }
++
++ hwfc->pool = av_buffer_pool_init2(sizeof(V4L2RequestDescriptor), avctx, v4l2_request_frame_alloc, v4l2_request_pool_free);
++ if (!hwfc->pool)
++ return AVERROR(ENOMEM);
++
++ hwfc->free = v4l2_request_hwframe_ctx_free;
++
++ hwfc->initial_pool_size = 1;
++
++ switch (avctx->codec_id) {
++ case AV_CODEC_ID_VP9:
++ hwfc->initial_pool_size += 8;
++ break;
++ case AV_CODEC_ID_VP8:
++ hwfc->initial_pool_size += 3;
++ break;
++ default:
++ hwfc->initial_pool_size += 2;
++ }
++
++ av_log(avctx, AV_LOG_DEBUG, "%s: avctx=%p ctx=%p hw_frames_ctx=%p hwfc=%p pool=%p width=%d height=%d initial_pool_size=%d\n", __func__, avctx, ctx, hw_frames_ctx, hwfc, hwfc->pool, hwfc->width, hwfc->height, hwfc->initial_pool_size);
++
++ return 0;
++}
+diff --git a/libavcodec/v4l2_request.h b/libavcodec/v4l2_request.h
+new file mode 100644
+index 000000000000..58d2aa70af80
+--- /dev/null
++++ b/libavcodec/v4l2_request.h
+@@ -0,0 +1,77 @@
++/*
++ * 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
++ */
++
++#ifndef AVCODEC_V4L2_REQUEST_H
++#define AVCODEC_V4L2_REQUEST_H
++
++#include <linux/videodev2.h>
++
++#include "libavutil/hwcontext_drm.h"
++
++typedef struct V4L2RequestContext {
++ int video_fd;
++ int media_fd;
++ enum v4l2_buf_type output_type;
++ struct v4l2_format format;
++ int timestamp;
++} V4L2RequestContext;
++
++typedef struct V4L2RequestBuffer {
++ int index;
++ int fd;
++ uint8_t *addr;
++ uint32_t width;
++ uint32_t height;
++ uint32_t size;
++ uint32_t used;
++ uint32_t capabilities;
++ struct v4l2_buffer buffer;
++} V4L2RequestBuffer;
++
++typedef struct V4L2RequestDescriptor {
++ AVDRMFrameDescriptor drm;
++ int request_fd;
++ V4L2RequestBuffer output;
++ V4L2RequestBuffer capture;
++} V4L2RequestDescriptor;
++
++uint64_t ff_v4l2_request_get_capture_timestamp(AVFrame *frame);
++
++int ff_v4l2_request_reset_frame(AVCodecContext *avctx, AVFrame *frame);
++
++int ff_v4l2_request_append_output_buffer(AVCodecContext *avctx, AVFrame *frame, const uint8_t *data, uint32_t size);
++
++int ff_v4l2_request_set_controls(AVCodecContext *avctx, struct v4l2_ext_control *control, int count);
++
++int ff_v4l2_request_get_controls(AVCodecContext *avctx, struct v4l2_ext_control *control, int count);
++
++int ff_v4l2_request_query_control(AVCodecContext *avctx, struct v4l2_query_ext_ctrl *control);
++
++int ff_v4l2_request_query_control_default_value(AVCodecContext *avctx, uint32_t id);
++
++int ff_v4l2_request_decode_slice(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count, int first_slice, int last_slice);
++
++int ff_v4l2_request_decode_frame(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count);
++
++int ff_v4l2_request_init(AVCodecContext *avctx, uint32_t pixelformat, uint32_t buffersize, struct v4l2_ext_control *control, int count);
++
++int ff_v4l2_request_uninit(AVCodecContext *avctx);
++
++int ff_v4l2_request_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx);
++
++#endif /* AVCODEC_V4L2_REQUEST_H */
+From a0a5b816593e3911aeedd201baa8057b64a89a39 Mon Sep 17 00:00:00 2001
+From: Ezequiel Garcia <ezequiel@collabora.com>
+Date: Wed, 20 Feb 2019 11:18:00 -0300
+Subject: [PATCH] h264dec: add idr_pic_id to slice context
+
+Used by V4L2 request API h264 hwaccel
+
+Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ libavcodec/h264_slice.c | 2 +-
+ libavcodec/h264dec.h | 1 +
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
+index db8363e4cc98..a19635a23d44 100644
+--- a/libavcodec/h264_slice.c
++++ b/libavcodec/h264_slice.c
+@@ -1818,7 +1818,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
+ }
+
+ if (nal->type == H264_NAL_IDR_SLICE)
+- get_ue_golomb_long(&sl->gb); /* idr_pic_id */
++ sl->idr_pic_id = get_ue_golomb_long(&sl->gb);
+
+ if (sps->poc_type == 0) {
+ sl->poc_lsb = get_bits(&sl->gb, sps->log2_max_poc_lsb);
+diff --git a/libavcodec/h264dec.h b/libavcodec/h264dec.h
+index a419615124b2..316dc6a2c890 100644
+--- a/libavcodec/h264dec.h
++++ b/libavcodec/h264dec.h
+@@ -335,6 +335,7 @@ typedef struct H264SliceContext {
+ int delta_poc[2];
+ int curr_pic_num;
+ int max_pic_num;
++ int idr_pic_id;
+ } H264SliceContext;
+
+ /**
+From 6349ae1e10d1b68c47c3b883b27567f9678c6e0c Mon Sep 17 00:00:00 2001
+From: Boris Brezillon <boris.brezillon@collabora.com>
+Date: Wed, 22 May 2019 14:44:22 +0200
+Subject: [PATCH] h264dec: add ref_pic_marking and pic_order_cnt bit_size to
+ slice context
+
+Used by V4L2 request API h264 hwaccel
+
+Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ libavcodec/h264_slice.c | 6 +++++-
+ libavcodec/h264dec.h | 2 ++
+ 2 files changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
+index a19635a23d44..5a5ceb09352c 100644
+--- a/libavcodec/h264_slice.c
++++ b/libavcodec/h264_slice.c
+@@ -1736,7 +1736,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
+ unsigned int slice_type, tmp, i;
+ int field_pic_flag, bottom_field_flag;
+ int first_slice = sl == h->slice_ctx && !h->current_slice;
+- int picture_structure;
++ int picture_structure, pos;
+
+ if (first_slice)
+ av_assert0(!h->setup_finished);
+@@ -1820,6 +1820,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
+ if (nal->type == H264_NAL_IDR_SLICE)
+ sl->idr_pic_id = get_ue_golomb_long(&sl->gb);
+
++ pos = sl->gb.index;
+ if (sps->poc_type == 0) {
+ sl->poc_lsb = get_bits(&sl->gb, sps->log2_max_poc_lsb);
+
+@@ -1833,6 +1834,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
+ if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
+ sl->delta_poc[1] = get_se_golomb(&sl->gb);
+ }
++ sl->pic_order_cnt_bit_size = sl->gb.index - pos;
+
+ sl->redundant_pic_count = 0;
+ if (pps->redundant_pic_cnt_present)
+@@ -1872,9 +1874,11 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
+
+ sl->explicit_ref_marking = 0;
+ if (nal->ref_idc) {
++ pos = sl->gb.index;
+ ret = ff_h264_decode_ref_pic_marking(sl, &sl->gb, nal, h->avctx);
+ if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
+ return AVERROR_INVALIDDATA;
++ sl->ref_pic_marking_bit_size = sl->gb.index - pos;
+ }
+
+ if (sl->slice_type_nos != AV_PICTURE_TYPE_I && pps->cabac) {
+diff --git a/libavcodec/h264dec.h b/libavcodec/h264dec.h
+index 316dc6a2c890..f2cabac468d0 100644
+--- a/libavcodec/h264dec.h
++++ b/libavcodec/h264dec.h
+@@ -328,6 +328,7 @@ typedef struct H264SliceContext {
+ MMCO mmco[MAX_MMCO_COUNT];
+ int nb_mmco;
+ int explicit_ref_marking;
++ int ref_pic_marking_bit_size;
+
+ int frame_num;
+ int poc_lsb;
+@@ -336,6 +337,7 @@ typedef struct H264SliceContext {
+ int curr_pic_num;
+ int max_pic_num;
+ int idr_pic_id;
++ int pic_order_cnt_bit_size;
+ } H264SliceContext;
+
+ /**
+From 650875c24687c35290b2393ef39f77074ca49813 Mon Sep 17 00:00:00 2001
+From: Jernej Skrabec <jernej.skrabec@siol.net>
+Date: Sat, 15 Dec 2018 22:32:16 +0100
+Subject: [PATCH] Add V4L2 request API h264 hwaccel
+
+Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ configure | 3 +
+ libavcodec/Makefile | 1 +
+ libavcodec/h264_slice.c | 4 +
+ libavcodec/h264dec.c | 3 +
+ libavcodec/hwaccels.h | 1 +
+ libavcodec/v4l2_request_h264.c | 456 +++++++++++++++++++++++++++++++++
+ 6 files changed, 468 insertions(+)
+ create mode 100644 libavcodec/v4l2_request_h264.c
+
+diff --git a/configure b/configure
+index 9f9909a23696..293d0447f683 100755
+--- a/configure
++++ b/configure
+@@ -2925,6 +2925,8 @@ h264_dxva2_hwaccel_deps="dxva2"
+ h264_dxva2_hwaccel_select="h264_decoder"
+ h264_nvdec_hwaccel_deps="nvdec"
+ h264_nvdec_hwaccel_select="h264_decoder"
++h264_v4l2request_hwaccel_deps="v4l2_request"
++h264_v4l2request_hwaccel_select="h264_decoder"
+ h264_vaapi_hwaccel_deps="vaapi"
+ h264_vaapi_hwaccel_select="h264_decoder"
+ h264_vdpau_hwaccel_deps="vdpau"
+@@ -6567,6 +6569,7 @@ if enabled v4l2_m2m; then
+ fi
+
+ check_func_headers "linux/media.h linux/videodev2.h" v4l2_timeval_to_ns
++check_cc h264_v4l2_request linux/videodev2.h "int i = V4L2_PIX_FMT_H264_SLICE;"
+
+ check_headers sys/videoio.h
+ test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+diff --git a/libavcodec/Makefile b/libavcodec/Makefile
+index d74220516826..4f6e7fc2515c 100644
+--- a/libavcodec/Makefile
++++ b/libavcodec/Makefile
+@@ -903,6 +903,7 @@ OBJS-$(CONFIG_H264_D3D11VA_HWACCEL) += dxva2_h264.o
+ OBJS-$(CONFIG_H264_DXVA2_HWACCEL) += dxva2_h264.o
+ OBJS-$(CONFIG_H264_NVDEC_HWACCEL) += nvdec_h264.o
+ OBJS-$(CONFIG_H264_QSV_HWACCEL) += qsvdec_h2645.o
++OBJS-$(CONFIG_H264_V4L2REQUEST_HWACCEL) += v4l2_request_h264.o
+ OBJS-$(CONFIG_H264_VAAPI_HWACCEL) += vaapi_h264.o
+ OBJS-$(CONFIG_H264_VDPAU_HWACCEL) += vdpau_h264.o
+ OBJS-$(CONFIG_H264_VIDEOTOOLBOX_HWACCEL) += videotoolbox.o
+diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
+index 5a5ceb09352c..4ed267317184 100644
+--- a/libavcodec/h264_slice.c
++++ b/libavcodec/h264_slice.c
+@@ -759,6 +759,7 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
+ #define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
+ (CONFIG_H264_D3D11VA_HWACCEL * 2) + \
+ CONFIG_H264_NVDEC_HWACCEL + \
++ CONFIG_H264_V4L2REQUEST_HWACCEL + \
+ CONFIG_H264_VAAPI_HWACCEL + \
+ CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
+ CONFIG_H264_VDPAU_HWACCEL)
+@@ -843,6 +844,9 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
+ #endif
+ #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
+ *fmt++ = AV_PIX_FMT_VIDEOTOOLBOX;
++#endif
++#if CONFIG_H264_V4L2REQUEST_HWACCEL
++ *fmt++ = AV_PIX_FMT_DRM_PRIME;
+ #endif
+ if (h->avctx->codec->pix_fmts)
+ choices = h->avctx->codec->pix_fmts;
+diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
+index 5eedeb3c275d..a504c89565c7 100644
+--- a/libavcodec/h264dec.c
++++ b/libavcodec/h264dec.c
+@@ -1102,6 +1102,9 @@ AVCodec ff_h264_decoder = {
+ #endif
+ #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
+ HWACCEL_VIDEOTOOLBOX(h264),
++#endif
++#if CONFIG_H264_V4L2REQUEST_HWACCEL
++ HWACCEL_V4L2REQUEST(h264),
+ #endif
+ NULL
+ },
+diff --git a/libavcodec/hwaccels.h b/libavcodec/hwaccels.h
+index 6109c89bd63c..f758c34ddcf9 100644
+--- a/libavcodec/hwaccels.h
++++ b/libavcodec/hwaccels.h
+@@ -27,6 +27,7 @@ extern const AVHWAccel ff_h264_d3d11va_hwaccel;
+ extern const AVHWAccel ff_h264_d3d11va2_hwaccel;
+ extern const AVHWAccel ff_h264_dxva2_hwaccel;
+ extern const AVHWAccel ff_h264_nvdec_hwaccel;
++extern const AVHWAccel ff_h264_v4l2request_hwaccel;
+ extern const AVHWAccel ff_h264_vaapi_hwaccel;
+ extern const AVHWAccel ff_h264_vdpau_hwaccel;
+ extern const AVHWAccel ff_h264_videotoolbox_hwaccel;
+diff --git a/libavcodec/v4l2_request_h264.c b/libavcodec/v4l2_request_h264.c
+new file mode 100644
+index 000000000000..88da8f0a2db0
+--- /dev/null
++++ b/libavcodec/v4l2_request_h264.c
+@@ -0,0 +1,456 @@
++/*
++ * 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 "h264dec.h"
++#include "hwconfig.h"
++#include "v4l2_request.h"
++
++typedef struct V4L2RequestControlsH264 {
++ struct v4l2_ctrl_h264_sps sps;
++ struct v4l2_ctrl_h264_pps pps;
++ struct v4l2_ctrl_h264_scaling_matrix scaling_matrix;
++ struct v4l2_ctrl_h264_decode_params decode_params;
++ struct v4l2_ctrl_h264_slice_params slice_params;
++ struct v4l2_ctrl_h264_pred_weights pred_weights;
++ int pred_weights_required;
++ int first_slice;
++ int num_slices;
++} V4L2RequestControlsH264;
++
++typedef struct V4L2RequestContextH264 {
++ V4L2RequestContext base;
++ int decode_mode;
++ int start_code;
++} V4L2RequestContextH264;
++
++static uint8_t nalu_slice_start_code[] = { 0x00, 0x00, 0x01 };
++
++static void fill_weight_factors(struct v4l2_h264_weight_factors *factors, int list, const H264SliceContext *sl)
++{
++ for (int i = 0; i < sl->ref_count[list]; i++) {
++ if (sl->pwt.luma_weight_flag[list]) {
++ factors->luma_weight[i] = sl->pwt.luma_weight[i][list][0];
++ factors->luma_offset[i] = sl->pwt.luma_weight[i][list][1];
++ } else {
++ factors->luma_weight[i] = 1 << sl->pwt.luma_log2_weight_denom;
++ factors->luma_offset[i] = 0;
++ }
++ for (int j = 0; j < 2; j++) {
++ if (sl->pwt.chroma_weight_flag[list]) {
++ factors->chroma_weight[i][j] = sl->pwt.chroma_weight[i][list][j][0];
++ factors->chroma_offset[i][j] = sl->pwt.chroma_weight[i][list][j][1];
++ } else {
++ factors->chroma_weight[i][j] = 1 << sl->pwt.chroma_log2_weight_denom;
++ factors->chroma_offset[i][j] = 0;
++ }
++ }
++ }
++}
++
++static void fill_dpb_entry(struct v4l2_h264_dpb_entry *entry, const H264Picture *pic)
++{
++ entry->reference_ts = ff_v4l2_request_get_capture_timestamp(pic->f);
++ entry->pic_num = pic->pic_id;
++ entry->frame_num = pic->frame_num;
++ entry->fields = pic->reference & V4L2_H264_FRAME_REF;
++ entry->flags = V4L2_H264_DPB_ENTRY_FLAG_VALID;
++ if (entry->fields)
++ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_ACTIVE;
++ if (pic->long_ref)
++ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM;
++ if (pic->field_picture)
++ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_FIELD;
++ if (pic->field_poc[0] != INT_MAX)
++ entry->top_field_order_cnt = pic->field_poc[0];
++ if (pic->field_poc[1] != INT_MAX)
++ entry->bottom_field_order_cnt = pic->field_poc[1];
++}
++
++static void fill_dpb(struct v4l2_ctrl_h264_decode_params *decode, const H264Context *h)
++{
++ int entries = 0;
++
++ for (int i = 0; i < h->short_ref_count; i++) {
++ const H264Picture *pic = h->short_ref[i];
++ if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
++ fill_dpb_entry(&decode->dpb[entries++], pic);
++ }
++
++ if (!h->long_ref_count)
++ return;
++
++ for (int i = 0; i < FF_ARRAY_ELEMS(h->long_ref); i++) {
++ const H264Picture *pic = h->long_ref[i];
++ if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
++ fill_dpb_entry(&decode->dpb[entries++], pic);
++ }
++}
++
++static void fill_ref_list(struct v4l2_h264_reference *reference, struct v4l2_ctrl_h264_decode_params *decode, const H264Ref *ref)
++{
++ uint64_t timestamp;
++
++ if (!ref->parent)
++ return;
++
++ timestamp = ff_v4l2_request_get_capture_timestamp(ref->parent->f);
++
++ for (uint8_t i = 0; i < FF_ARRAY_ELEMS(decode->dpb); i++) {
++ struct v4l2_h264_dpb_entry *entry = &decode->dpb[i];
++ if ((entry->flags & V4L2_H264_DPB_ENTRY_FLAG_VALID) &&
++ entry->reference_ts == timestamp) {
++ reference->fields = ref->reference & V4L2_H264_FRAME_REF;
++ reference->index = i;
++ return;
++ }
++ }
++}
++
++static void fill_sps(struct v4l2_ctrl_h264_sps *ctrl, const H264Context *h)
++{
++ const SPS *sps = h->ps.sps;
++
++ *ctrl = (struct v4l2_ctrl_h264_sps) {
++ .profile_idc = sps->profile_idc,
++ .constraint_set_flags = sps->constraint_set_flags,
++ .level_idc = sps->level_idc,
++ .seq_parameter_set_id = sps->sps_id,
++ .chroma_format_idc = sps->chroma_format_idc,
++ .bit_depth_luma_minus8 = sps->bit_depth_luma - 8,
++ .bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
++ .log2_max_frame_num_minus4 = sps->log2_max_frame_num - 4,
++ .pic_order_cnt_type = sps->poc_type,
++ .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
++ .max_num_ref_frames = sps->ref_frame_count,
++ .num_ref_frames_in_pic_order_cnt_cycle = sps->poc_cycle_length,
++ .offset_for_non_ref_pic = sps->offset_for_non_ref_pic,
++ .offset_for_top_to_bottom_field = sps->offset_for_top_to_bottom_field,
++ .pic_width_in_mbs_minus1 = h->mb_width - 1,
++ .pic_height_in_map_units_minus1 = sps->frame_mbs_only_flag ? h->mb_height - 1 : h->mb_height / 2 - 1,
++ };
++
++ if (sps->poc_cycle_length > 0 && sps->poc_cycle_length <= 255)
++ memcpy(ctrl->offset_for_ref_frame, sps->offset_for_ref_frame, sps->poc_cycle_length * sizeof(ctrl->offset_for_ref_frame[0]));
++
++ if (sps->residual_color_transform_flag)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
++ if (sps->transform_bypass)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
++ if (sps->delta_pic_order_always_zero_flag)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO;
++ if (sps->gaps_in_frame_num_allowed_flag)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED;
++ if (sps->frame_mbs_only_flag)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY;
++ if (sps->mb_aff)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
++ if (sps->direct_8x8_inference_flag)
++ ctrl->flags |= V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE;
++}
++
++static void fill_pps(struct v4l2_ctrl_h264_pps *ctrl, const H264Context *h)
++{
++ const SPS *sps = h->ps.sps;
++ const PPS *pps = h->ps.pps;
++ const H264SliceContext *sl = &h->slice_ctx[0];
++ int qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
++
++ *ctrl = (struct v4l2_ctrl_h264_pps) {
++ .pic_parameter_set_id = sl->pps_id,
++ .seq_parameter_set_id = pps->sps_id,
++ .num_slice_groups_minus1 = pps->slice_group_count - 1,
++ .num_ref_idx_l0_default_active_minus1 = pps->ref_count[0] - 1,
++ .num_ref_idx_l1_default_active_minus1 = pps->ref_count[1] - 1,
++ .weighted_bipred_idc = pps->weighted_bipred_idc,
++ .pic_init_qp_minus26 = pps->init_qp - 26 - qp_bd_offset,
++ .pic_init_qs_minus26 = pps->init_qs - 26 - qp_bd_offset,
++ .chroma_qp_index_offset = pps->chroma_qp_index_offset[0],
++ .second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1],
++ };
++
++ if (pps->cabac)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE;
++ if (pps->pic_order_present)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT;
++ if (pps->weighted_pred)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_WEIGHTED_PRED;
++ if (pps->deblocking_filter_parameters_present)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT;
++ if (pps->constrained_intra_pred)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED;
++ if (pps->redundant_pic_cnt_present)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT;
++ if (pps->transform_8x8_mode)
++ ctrl->flags |= V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE;
++
++ /* FFmpeg always provide a scaling matrix */
++ ctrl->flags |= V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT;
++}
++
++static int v4l2_request_h264_start_frame(AVCodecContext *avctx,
++ av_unused const uint8_t *buffer,
++ av_unused uint32_t size)
++{
++ const H264Context *h = avctx->priv_data;
++ const PPS *pps = h->ps.pps;
++ const SPS *sps = h->ps.sps;
++ const H264SliceContext *sl = &h->slice_ctx[0];
++ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
++
++ fill_sps(&controls->sps, h);
++ fill_pps(&controls->pps, h);
++
++ memcpy(controls->scaling_matrix.scaling_list_4x4, pps->scaling_matrix4, sizeof(controls->scaling_matrix.scaling_list_4x4));
++ memcpy(controls->scaling_matrix.scaling_list_8x8[0], pps->scaling_matrix8[0], sizeof(controls->scaling_matrix.scaling_list_8x8[0]));
++ memcpy(controls->scaling_matrix.scaling_list_8x8[1], pps->scaling_matrix8[3], sizeof(controls->scaling_matrix.scaling_list_8x8[1]));
++
++ if (sps->chroma_format_idc == 3) {
++ memcpy(controls->scaling_matrix.scaling_list_8x8[2], pps->scaling_matrix8[1], sizeof(controls->scaling_matrix.scaling_list_8x8[2]));
++ memcpy(controls->scaling_matrix.scaling_list_8x8[3], pps->scaling_matrix8[4], sizeof(controls->scaling_matrix.scaling_list_8x8[3]));
++ memcpy(controls->scaling_matrix.scaling_list_8x8[4], pps->scaling_matrix8[2], sizeof(controls->scaling_matrix.scaling_list_8x8[4]));
++ memcpy(controls->scaling_matrix.scaling_list_8x8[5], pps->scaling_matrix8[5], sizeof(controls->scaling_matrix.scaling_list_8x8[5]));
++ }
++
++ controls->decode_params = (struct v4l2_ctrl_h264_decode_params) {
++ .nal_ref_idc = h->nal_ref_idc,
++ .frame_num = h->poc.frame_num,
++ .top_field_order_cnt = h->cur_pic_ptr->field_poc[0] != INT_MAX ? h->cur_pic_ptr->field_poc[0] : 0,
++ .bottom_field_order_cnt = h->cur_pic_ptr->field_poc[1] != INT_MAX ? h->cur_pic_ptr->field_poc[1] : 0,
++ .idr_pic_id = sl->idr_pic_id,
++ .pic_order_cnt_lsb = sl->poc_lsb,
++ .delta_pic_order_cnt_bottom = sl->delta_poc_bottom,
++ .delta_pic_order_cnt0 = sl->delta_poc[0],
++ .delta_pic_order_cnt1 = sl->delta_poc[1],
++ /* Size in bits of dec_ref_pic_marking() syntax element. */
++ .dec_ref_pic_marking_bit_size = sl->ref_pic_marking_bit_size,
++ /* Size in bits of pic order count syntax. */
++ .pic_order_cnt_bit_size = sl->pic_order_cnt_bit_size,
++ .slice_group_change_cycle = 0, /* slice group not supported by FFmpeg */
++ };
++
++ if (h->picture_idr)
++ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC;
++ if (FIELD_PICTURE(h))
++ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC;
++ if (h->picture_structure == PICT_BOTTOM_FIELD)
++ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD;
++
++ fill_dpb(&controls->decode_params, h);
++
++ controls->first_slice = !FIELD_PICTURE(h) || h->first_field;
++ controls->num_slices = 0;
++
++ return ff_v4l2_request_reset_frame(avctx, h->cur_pic_ptr->f);
++}
++
++static int v4l2_request_h264_queue_decode(AVCodecContext *avctx, int last_slice)
++{
++ const H264Context *h = avctx->priv_data;
++ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
++ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
++
++ struct v4l2_ext_control control[] = {
++ {
++ .id = V4L2_CID_STATELESS_H264_SPS,
++ .ptr = &controls->sps,
++ .size = sizeof(controls->sps),
++ },
++ {
++ .id = V4L2_CID_STATELESS_H264_PPS,
++ .ptr = &controls->pps,
++ .size = sizeof(controls->pps),
++ },
++ {
++ .id = V4L2_CID_STATELESS_H264_SCALING_MATRIX,
++ .ptr = &controls->scaling_matrix,
++ .size = sizeof(controls->scaling_matrix),
++ },
++ {
++ .id = V4L2_CID_STATELESS_H264_DECODE_PARAMS,
++ .ptr = &controls->decode_params,
++ .size = sizeof(controls->decode_params),
++ },
++ {
++ .id = V4L2_CID_STATELESS_H264_SLICE_PARAMS,
++ .ptr = &controls->slice_params,
++ .size = sizeof(controls->slice_params),
++ },
++ {
++ .id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS,
++ .ptr = &controls->pred_weights,
++ .size = sizeof(controls->pred_weights),
++ },
++ };
++
++ if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED) {
++ int count = FF_ARRAY_ELEMS(control) - (controls->pred_weights_required ? 0 : 1);
++ return ff_v4l2_request_decode_slice(avctx, h->cur_pic_ptr->f, control, count, controls->first_slice, last_slice);
++ }
++
++ return ff_v4l2_request_decode_frame(avctx, h->cur_pic_ptr->f, control, FF_ARRAY_ELEMS(control) - 2);
++}
++
++static int v4l2_request_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
++{
++ const H264Context *h = avctx->priv_data;
++ const PPS *pps = h->ps.pps;
++ const H264SliceContext *sl = &h->slice_ctx[0];
++ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
++ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
++ int i, ret, count;
++
++ if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED && controls->num_slices) {
++ ret = v4l2_request_h264_queue_decode(avctx, 0);
++ if (ret)
++ return ret;
++
++ ff_v4l2_request_reset_frame(avctx, h->cur_pic_ptr->f);
++ controls->first_slice = 0;
++ }
++
++ if (ctx->start_code == V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
++ ret = ff_v4l2_request_append_output_buffer(avctx, h->cur_pic_ptr->f, nalu_slice_start_code, 3);
++ if (ret)
++ return ret;
++ }
++
++ ret = ff_v4l2_request_append_output_buffer(avctx, h->cur_pic_ptr->f, buffer, size);
++ if (ret)
++ return ret;
++
++ if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED)
++ return 0;
++
++ controls->slice_params = (struct v4l2_ctrl_h264_slice_params) {
++ /* Offset in bits to slice_data() from the beginning of this slice. */
++ .header_bit_size = get_bits_count(&sl->gb),
++
++ .first_mb_in_slice = sl->first_mb_addr,
++
++ .slice_type = ff_h264_get_slice_type(sl),
++ .colour_plane_id = 0, /* separate colour plane not supported by FFmpeg */
++ .redundant_pic_cnt = sl->redundant_pic_count,
++ .cabac_init_idc = sl->cabac_init_idc,
++ .slice_qp_delta = sl->qscale - pps->init_qp,
++ .slice_qs_delta = 0, /* not implemented by FFmpeg */
++ .disable_deblocking_filter_idc = sl->deblocking_filter < 2 ? !sl->deblocking_filter : sl->deblocking_filter,
++ .slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2,
++ .slice_beta_offset_div2 = sl->slice_beta_offset / 2,
++ .num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0,
++ .num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0,
++ };
++
++ if (sl->slice_type == AV_PICTURE_TYPE_B && sl->direct_spatial_mv_pred)
++ controls->slice_params.flags |= V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
++ /* V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH: not implemented by FFmpeg */
++
++ controls->pred_weights_required = V4L2_H264_CTRL_PRED_WEIGHTS_REQUIRED(&controls->pps, &controls->slice_params);
++ if (controls->pred_weights_required) {
++ controls->pred_weights.chroma_log2_weight_denom = sl->pwt.chroma_log2_weight_denom;
++ controls->pred_weights.luma_log2_weight_denom = sl->pwt.luma_log2_weight_denom;
++ }
++
++ count = sl->list_count > 0 ? sl->ref_count[0] : 0;
++ for (i = 0; i < count; i++)
++ fill_ref_list(&controls->slice_params.ref_pic_list0[i], &controls->decode_params, &sl->ref_list[0][i]);
++ if (count && controls->pred_weights_required)
++ fill_weight_factors(&controls->pred_weights.weight_factors[0], 0, sl);
++
++ count = sl->list_count > 1 ? sl->ref_count[1] : 0;
++ for (i = 0; i < count; i++)
++ fill_ref_list(&controls->slice_params.ref_pic_list1[i], &controls->decode_params, &sl->ref_list[1][i]);
++ if (count && controls->pred_weights_required)
++ fill_weight_factors(&controls->pred_weights.weight_factors[1], 1, sl);
++
++ controls->num_slices++;
++ return 0;
++}
++
++static int v4l2_request_h264_end_frame(AVCodecContext *avctx)
++{
++ const H264Context *h = avctx->priv_data;
++ return v4l2_request_h264_queue_decode(avctx, !FIELD_PICTURE(h) || !h->first_field);
++}
++
++static int v4l2_request_h264_set_controls(AVCodecContext *avctx)
++{
++ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
++
++ struct v4l2_ext_control control[] = {
++ { .id = V4L2_CID_STATELESS_H264_DECODE_MODE, },
++ { .id = V4L2_CID_STATELESS_H264_START_CODE, },
++ };
++
++ ctx->decode_mode = ff_v4l2_request_query_control_default_value(avctx, V4L2_CID_STATELESS_H264_DECODE_MODE);
++ if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED &&
++ ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED) {
++ av_log(avctx, AV_LOG_ERROR, "%s: unsupported decode mode, %d\n", __func__, ctx->decode_mode);
++ return AVERROR(EINVAL);
++ }
++
++ ctx->start_code = ff_v4l2_request_query_control_default_value(avctx, V4L2_CID_STATELESS_H264_START_CODE);
++ if (ctx->start_code != V4L2_STATELESS_H264_START_CODE_NONE &&
++ ctx->start_code != V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
++ av_log(avctx, AV_LOG_ERROR, "%s: unsupported start code, %d\n", __func__, ctx->start_code);
++ return AVERROR(EINVAL);
++ }
++
++ control[0].value = ctx->decode_mode;
++ control[1].value = ctx->start_code;
++
++ return ff_v4l2_request_set_controls(avctx, control, FF_ARRAY_ELEMS(control));
++}
++
++static int v4l2_request_h264_init(AVCodecContext *avctx)
++{
++ const H264Context *h = avctx->priv_data;
++ struct v4l2_ctrl_h264_sps sps;
++ int ret;
++
++ struct v4l2_ext_control control[] = {
++ {
++ .id = V4L2_CID_STATELESS_H264_SPS,
++ .ptr = &sps,
++ .size = sizeof(sps),
++ },
++ };
++
++ fill_sps(&sps, h);
++
++ ret = ff_v4l2_request_init(avctx, V4L2_PIX_FMT_H264_SLICE, 4 * 1024 * 1024, control, FF_ARRAY_ELEMS(control));
++ if (ret)
++ return ret;
++
++ return v4l2_request_h264_set_controls(avctx);
++}
++
++const AVHWAccel ff_h264_v4l2request_hwaccel = {
++ .name = "h264_v4l2request",
++ .type = AVMEDIA_TYPE_VIDEO,
++ .id = AV_CODEC_ID_H264,
++ .pix_fmt = AV_PIX_FMT_DRM_PRIME,
++ .start_frame = v4l2_request_h264_start_frame,
++ .decode_slice = v4l2_request_h264_decode_slice,
++ .end_frame = v4l2_request_h264_end_frame,
++ .frame_priv_data_size = sizeof(V4L2RequestControlsH264),
++ .init = v4l2_request_h264_init,
++ .uninit = ff_v4l2_request_uninit,
++ .priv_data_size = sizeof(V4L2RequestContextH264),
++ .frame_params = ff_v4l2_request_frame_params,
++ .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
++};
+From f9f4a89058a6fac25712cc385eab72f70e9ac4c8 Mon Sep 17 00:00:00 2001
+From: Jonas Karlman <jonas@kwiboo.se>
+Date: Mon, 29 Apr 2019 22:08:59 +0000
+Subject: [PATCH] HACK: hwcontext_drm: do not require drm device
+
+Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
+---
+ libavutil/hwcontext_drm.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/libavutil/hwcontext_drm.c b/libavutil/hwcontext_drm.c
+index 32cbde82ebfa..aa4794c5e665 100644
+--- a/libavutil/hwcontext_drm.c
++++ b/libavutil/hwcontext_drm.c
+@@ -43,6 +43,11 @@ static int drm_device_create(AVHWDeviceContext *hwdev, const char *device,
+ AVDRMDeviceContext *hwctx = hwdev->hwctx;
+ drmVersionPtr version;
+
++ if (device == NULL) {
++ hwctx->fd = -1;
++ return 0;
++ }
++
+ hwctx->fd = open(device, O_RDWR);
+ if (hwctx->fd < 0)
+ return AVERROR(errno);
+From fa7165e391287bf970569e36b0b19bff947b084f Mon Sep 17 00:00:00 2001
+From: Jonas Karlman <jonas@kwiboo.se>
+Date: Mon, 27 Jul 2020 23:15:45 +0000
+Subject: [PATCH] HACK: define drm NV15 and NV20 format
+
+---
+ libavcodec/v4l2_request.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/libavcodec/v4l2_request.c b/libavcodec/v4l2_request.c
+index 0b294feff2eb..a8f0ee79eeef 100644
+--- a/libavcodec/v4l2_request.c
++++ b/libavcodec/v4l2_request.c
+@@ -30,6 +30,14 @@
+ #include "internal.h"
+ #include "v4l2_request.h"
+
++#ifndef DRM_FORMAT_NV15
++#define DRM_FORMAT_NV15 fourcc_code('N', 'V', '1', '5')
++#endif
++
++#ifndef DRM_FORMAT_NV20
++#define DRM_FORMAT_NV20 fourcc_code('N', 'V', '2', '0')
++#endif
++
+ uint64_t ff_v4l2_request_get_capture_timestamp(AVFrame *frame)
+ {
+ V4L2RequestDescriptor *req = (V4L2RequestDescriptor*)frame->data[0];
projects / packages / ffmpeg.git / commitdiff