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LibreELEC.tv/packages/multimedia/ffmpeg/patches/v4l2-request-api/ffmpeg-95.0002-Add-common-V4L2-request-API-code.patch
Matthias Reichl c4b17555e1 ffmpeg: move v4l2 request api patches to separate patch dir 
Signed-off-by: Matthias Reichl <hias@horus.com>
2019-06-27 21:22:13 +02:00

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From 0ba3c868e1d828520b8facaa4ce36d9b80339cc6 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Sat, 15 Dec 2018 22:32:16 +0100
Subject: [PATCH 2/6] Add common V4L2 request API code
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
configure | 12 +
libavcodec/Makefile | 1 +
libavcodec/hwaccel.h | 2 +
libavcodec/v4l2_request.c | 888 ++++++++++++++++++++++++++++++++++++++
libavcodec/v4l2_request.h | 65 +++
5 files changed, 968 insertions(+)
create mode 100644 libavcodec/v4l2_request.c
create mode 100644 libavcodec/v4l2_request.h
diff --git a/configure b/configure
index 172611bb4a..6401cae9e7 100755
--- a/configure
+++ b/configure
@@ -264,6 +264,7 @@ External library support:
--enable-libtls enable LibreSSL (via libtls), needed for https support
if openssl or gnutls 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]
@@ -324,6 +325,7 @@ 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]
@@ -1732,6 +1734,7 @@ EXTERNAL_LIBRARY_LIST="
libtesseract
libtheora
libtwolame
+ libudev
libv4l2
libvorbis
libvpx
@@ -1782,6 +1785,7 @@ HWACCEL_LIBRARY_LIST="
mmal
omx
opencl
+ v4l2_request
"
DOCUMENT_LIST="
@@ -2783,6 +2787,7 @@ 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"
videotoolbox_hwaccel_deps="videotoolbox pthreads"
videotoolbox_hwaccel_extralibs="-framework QuartzCore"
xvmc_deps="X11_extensions_XvMClib_h"
@@ -6063,6 +6068,7 @@ 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 >= 0.6.2" libvmaf.h compute_vmaf
@@ -6153,6 +6159,10 @@ 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"; }
if enabled gcrypt; then
GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"
@@ -6230,6 +6240,8 @@ check_cc h264_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_H264;"
check_cc vp8_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP8;"
check_cc vp9_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;"
+check_func_headers "linux/media.h linux/videodev2.h" v4l2_timeval_to_ns
+
check_header sys/videoio.h
test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4b8ad121db..48f6e06545 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -143,6 +143,7 @@ OBJS-$(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/hwaccel.h b/libavcodec/hwaccel.h
index 3aaa92571c..2eefc91e7e 100644
--- a/libavcodec/hwaccel.h
+++ b/libavcodec/hwaccel.h
@@ -80,5 +80,7 @@ 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)
#endif /* AVCODEC_HWACCEL_H */
diff --git a/libavcodec/v4l2_request.c b/libavcodec/v4l2_request.c
new file mode 100644
index 0000000000..4589209e60
--- /dev/null
+++ b/libavcodec/v4l2_request.c
@@ -0,0 +1,888 @@
+/*
+ * 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];
+ memcpy(req->output.addr + req->output.used, data, size);
+ req->output.used += size;
+ return 0;
+}
+
+static int v4l2_request_set_controls(V4L2RequestContext *ctx, int request_fd, 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, VIDIOC_S_EXT_CTRLS, &controls);
+}
+
+static int v4l2_request_queue_buffer(V4L2RequestContext *ctx, int request_fd, V4L2RequestBuffer *buf)
+{
+ struct v4l2_plane planes[1] = {};
+ struct v4l2_buffer buffer = {
+ .type = buf->buffer.type,
+ .memory = buf->buffer.memory,
+ .index = buf->index,
+ .timestamp.tv_usec = buf->index + 1,
+ .bytesused = buf->used,
+ .request_fd = request_fd,
+ .flags = (request_fd >= 0) ? V4L2_BUF_FLAG_REQUEST_FD : 0,
+ };
+
+ 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;
+}
+
+int ff_v4l2_request_decode_frame(AVCodecContext *avctx, AVFrame *frame, struct v4l2_ext_control *control, int count)
+{
+ 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\n", __func__, avctx, req->output.used, count, req->capture.index, req->capture.fd, req->request_fd);
+
+ 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);
+
+ ret = v4l2_request_queue_buffer(ctx, req->request_fd, &req->output);
+ 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;
+ }
+
+ ret = v4l2_request_queue_buffer(ctx, -1, &req->capture);
+ 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;
+ }
+
+ 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;
+ }
+
+ return v4l2_request_set_drm_descriptor(req, &ctx->format);
+
+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;
+}
+
+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_ERROR, "%s: try output format failed\n", __func__);
+ 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_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_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;
+
+ 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_reclaim(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->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;
+ }
+
+ buf->buffer.timestamp.tv_usec = buf->index + 1;
+
+ 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_reclaim(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 0000000000..688962ca94
--- /dev/null
+++ b/libavcodec/v4l2_request.h
@@ -0,0 +1,65 @@
+/*
+ * 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;
+} V4L2RequestContext;
+
+typedef struct V4L2RequestBuffer {
+ int index;
+ int fd;
+ uint8_t *addr;
+ uint32_t width;
+ uint32_t height;
+ uint32_t size;
+ uint32_t used;
+ 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_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 */
--
2.21.0
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