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Lakka-v5.x
Lakka-LibreELEC/packages/multimedia/ffmpeg/patches/vf-deinterlace-v4l2m2m/ffmpeg-001-vf-deinterlace-v4l2m2m.patch
Matthias Reichl 347c09b30b ffmpeg: update vf-deinterlace-v4l2m2m patch 
Patch created using revisions ea3d24b..d38cb51
from branch vf-deinterlace-v4l2m2m-n6.0 of https://github.com/jernejsk/FFmpeg
2023-04-01 17:46:52 +02:00

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From d38cb51a9362250b53aa9c7637b17d90718f5f65 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Tue, 3 Dec 2019 21:01:18 +0100
Subject: [PATCH] Add V4L2 m2m deinterlace filter
Signed-off-by: Alex Bee <knaerzche@gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_deinterlace_v4l2m2m.c | 1009 ++++++++++++++++++++++++++
3 files changed, 1011 insertions(+)
create mode 100644 libavfilter/vf_deinterlace_v4l2m2m.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index b3d3d981dd..9103e3b395 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -262,6 +262,7 @@ OBJS-$(CONFIG_DEFLATE_FILTER) += vf_neighbor.o
OBJS-$(CONFIG_DEFLICKER_FILTER) += vf_deflicker.o
OBJS-$(CONFIG_DEINTERLACE_QSV_FILTER) += vf_vpp_qsv.o
OBJS-$(CONFIG_DEINTERLACE_VAAPI_FILTER) += vf_deinterlace_vaapi.o vaapi_vpp.o
+OBJS-$(CONFIG_DEINTERLACE_V4L2M2M_FILTER) += vf_deinterlace_v4l2m2m.o
OBJS-$(CONFIG_DEJUDDER_FILTER) += vf_dejudder.o
OBJS-$(CONFIG_DELOGO_FILTER) += vf_delogo.o
OBJS-$(CONFIG_DENOISE_VAAPI_FILTER) += vf_misc_vaapi.o vaapi_vpp.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d7db46c2af..075f065f3c 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -240,6 +240,7 @@ extern const AVFilter ff_vf_dedot;
extern const AVFilter ff_vf_deflate;
extern const AVFilter ff_vf_deflicker;
extern const AVFilter ff_vf_deinterlace_qsv;
+extern const AVFilter ff_vf_deinterlace_v4l2m2m;
extern const AVFilter ff_vf_deinterlace_vaapi;
extern const AVFilter ff_vf_dejudder;
extern const AVFilter ff_vf_delogo;
diff --git a/libavfilter/vf_deinterlace_v4l2m2m.c b/libavfilter/vf_deinterlace_v4l2m2m.c
new file mode 100644
index 0000000000..ff5ed500a9
--- /dev/null
+++ b/libavfilter/vf_deinterlace_v4l2m2m.c
@@ -0,0 +1,1009 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * deinterlace video filter - V4L2 M2M
+ */
+
+#include <drm_fourcc.h>
+
+#include <linux/videodev2.h>
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stdatomic.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/common.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_drm.h"
+#include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/time.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct V4L2Queue V4L2Queue;
+typedef struct DeintV4L2M2MContextShared DeintV4L2M2MContextShared;
+
+typedef struct V4L2PlaneInfo {
+ int bytesperline;
+ size_t length;
+} V4L2PlaneInfo;
+
+typedef struct V4L2Buffer {
+ int enqueued;
+ int reenqueue;
+ int fd;
+ struct v4l2_buffer buffer;
+ struct v4l2_plane planes[VIDEO_MAX_PLANES];
+ int num_planes;
+ V4L2PlaneInfo plane_info[VIDEO_MAX_PLANES];
+ AVDRMFrameDescriptor drm_frame;
+ V4L2Queue *q;
+} V4L2Buffer;
+
+typedef struct V4L2Queue {
+ struct v4l2_format format;
+ int num_buffers;
+ V4L2Buffer *buffers;
+ DeintV4L2M2MContextShared *ctx;
+} V4L2Queue;
+
+typedef struct DeintV4L2M2MContextShared {
+ int fd;
+ int done;
+ int width;
+ int height;
+ int orig_width;
+ int orig_height;
+ uint64_t drm_in_format;
+ uint64_t drm_out_format;
+
+ atomic_uint refcount;
+
+ AVBufferRef *hw_frames_ctx;
+
+ /*
+ * TODO: check if its really neccessary to hold this
+ * ref, it's only used for freeing av_frame on decoding
+ * end/abort
+ */
+ AVFrame *cur_in_frame;
+ AVFrame *prev_in_frame;
+ unsigned int field_order;
+
+ V4L2Queue output;
+ V4L2Queue capture;
+} DeintV4L2M2MContextShared;
+
+typedef struct DeintV4L2M2MContext {
+ const AVClass *class;
+
+ DeintV4L2M2MContextShared *shared;
+} DeintV4L2M2MContext;
+
+static inline uint32_t v4l2_pix_fmt_from_drm_format(uint64_t drm_format)
+{
+ switch(drm_format) {
+#if defined(V4L2_PIX_FMT_SUNXI_TILED_NV12) && defined(DRM_FORMAT_MOD_ALLWINNER_TILED)
+ case DRM_FORMAT_MOD_ALLWINNER_TILED:
+ return V4L2_PIX_FMT_SUNXI_TILED_NV12;
+#endif
+ case DRM_FORMAT_NV12:
+ return V4L2_PIX_FMT_NV12;
+#if defined(V4L2_PIX_FMT_NV15) && defined(DRM_FORMAT_NV15)
+ case DRM_FORMAT_NV15:
+ return V4L2_PIX_FMT_NV15;
+#endif
+ case DRM_FORMAT_NV16:
+ return V4L2_PIX_FMT_NV16;
+#if defined(V4L2_PIX_FMT_NV20) && defined(DRM_FORMAT_NV20)
+ case DRM_FORMAT_NV20:
+ return V4L2_PIX_FMT_NV20;
+#endif
+ case DRM_FORMAT_NV21:
+ return V4L2_PIX_FMT_NV21;
+ case DRM_FORMAT_NV61:
+ return V4L2_PIX_FMT_NV61;
+ default:
+ av_log(NULL, AV_LOG_WARNING, "%s unknown drm format 0x%llx using default v4l2_pix_fmt 0x%x\n",
+ __func__ , drm_format, V4L2_PIX_FMT_NV12);
+ return V4L2_PIX_FMT_NV12;
+ }
+}
+
+static inline uint64_t drm_format_from_v4l2_pix_fmt(uint32_t v4l2_pix_fmt)
+{
+ switch(v4l2_pix_fmt) {
+ case V4L2_PIX_FMT_NV12:
+ return DRM_FORMAT_NV12;
+#if defined(V4L2_PIX_FMT_NV15) && defined(DRM_FORMAT_NV15)
+ case V4L2_PIX_FMT_NV15:
+ return DRM_FORMAT_NV15;
+#endif
+ case V4L2_PIX_FMT_NV16:
+ return DRM_FORMAT_NV16;
+#if defined(V4L2_PIX_FMT_NV20) && defined(DRM_FORMAT_NV20)
+ case V4L2_PIX_FMT_NV20:
+ return DRM_FORMAT_NV20;
+#endif
+ case V4L2_PIX_FMT_NV21:
+ return DRM_FORMAT_NV21;
+ case V4L2_PIX_FMT_NV61:
+ return DRM_FORMAT_NV61;
+#if defined(V4L2_PIX_FMT_SUNXI_TILED_NV12) && defined(DRM_FORMAT_MOD_ALLWINNER_TILED)
+ case V4L2_PIX_FMT_SUNXI_TILED_NV12:
+ return DRM_FORMAT_MOD_ALLWINNER_TILED;
+#endif
+ default:
+ av_log(NULL, AV_LOG_WARNING, "%s unknown v4l2_pix_fmt format 0x%x using default drm_format 0x%x\n",
+ __func__ , v4l2_pix_fmt, DRM_FORMAT_NV12);
+ return DRM_FORMAT_NV12;
+ }
+}
+
+static inline uint64_t drm_format_modifier(uint64_t drm_format)
+{
+#ifdef DRM_FORMAT_MOD_ALLWINNER_TILED
+ if (drm_format == DRM_FORMAT_MOD_ALLWINNER_TILED)
+ return DRM_FORMAT_MOD_ALLWINNER_TILED;
+#endif
+ return DRM_FORMAT_MOD_LINEAR;
+
+}
+
+static int deint_v4l2m2m_prepare_context(DeintV4L2M2MContextShared *ctx)
+{
+ struct v4l2_capability cap;
+ int ret;
+
+ memset(&cap, 0, sizeof(cap));
+ ret = ioctl(ctx->fd, VIDIOC_QUERYCAP, &cap);
+ if (ret < 0)
+ return ret;
+
+ if (!(cap.capabilities & V4L2_CAP_STREAMING))
+ return AVERROR(EINVAL);
+
+ if (cap.capabilities & V4L2_CAP_VIDEO_M2M) {
+ ctx->capture.format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ ctx->output.format.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+
+ return 0;
+ }
+
+ if (cap.capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) {
+ ctx->capture.format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ ctx->output.format.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+
+ return 0;
+ }
+
+ return AVERROR(EINVAL);
+}
+
+static int deint_v4l2m2m_try_format(V4L2Queue *queue, uint64_t drm_format)
+{
+ struct v4l2_format *fmt = &queue->format;
+ DeintV4L2M2MContextShared *ctx = queue->ctx;
+ int ret, field;
+ uint32_t v4l2_pix_fmt = v4l2_pix_fmt_from_drm_format(drm_format);
+
+ ret = ioctl(ctx->fd, VIDIOC_G_FMT, fmt);
+ if (ret)
+ av_log(NULL, AV_LOG_ERROR, "VIDIOC_G_FMT failed: %d\n", ret);
+
+ if (V4L2_TYPE_IS_OUTPUT(fmt->type))
+ field = V4L2_FIELD_INTERLACED_TB;
+ else
+ field = V4L2_FIELD_NONE;
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(fmt->type)) {
+ fmt->fmt.pix_mp.pixelformat = v4l2_pix_fmt;
+ fmt->fmt.pix_mp.field = field;
+ fmt->fmt.pix_mp.width = ctx->width;
+ fmt->fmt.pix_mp.height = ctx->height;
+ } else {
+ fmt->fmt.pix.pixelformat = v4l2_pix_fmt;
+ fmt->fmt.pix.field = field;
+ fmt->fmt.pix.width = ctx->width;
+ fmt->fmt.pix.height = ctx->height;
+ }
+
+ ret = ioctl(ctx->fd, VIDIOC_TRY_FMT, fmt);
+ if (ret)
+ return AVERROR(EINVAL);
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(fmt->type)) {
+ if (fmt->fmt.pix_mp.pixelformat != v4l2_pix_fmt ||
+ fmt->fmt.pix_mp.field != field) {
+ av_log(NULL, AV_LOG_DEBUG, "format not supported for type %d\n", fmt->type);
+
+ return AVERROR(EINVAL);
+ }
+ } else {
+ if (fmt->fmt.pix.pixelformat != v4l2_pix_fmt ||
+ fmt->fmt.pix.field != field) {
+ av_log(NULL, AV_LOG_DEBUG, "format not supported for type %d\n", fmt->type);
+
+ return AVERROR(EINVAL);
+ }
+ }
+
+ return 0;
+}
+static int deint_v4l2m2m_set_format(V4L2Queue *queue, uint32_t field, int width, int height, uint64_t drm_format)
+{
+ struct v4l2_format *fmt = &queue->format;
+ DeintV4L2M2MContextShared *ctx = queue->ctx;
+ int ret;
+ uint32_t v4l2_pix_fmt = v4l2_pix_fmt_from_drm_format(drm_format);
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(fmt->type)) {
+ fmt->fmt.pix_mp.pixelformat = v4l2_pix_fmt;
+ fmt->fmt.pix_mp.field = field;
+ fmt->fmt.pix_mp.width = width;
+ fmt->fmt.pix_mp.height = height;
+ /* TODO: bytesperline and imagesize */
+ } else {
+ fmt->fmt.pix.pixelformat = v4l2_pix_fmt;
+ fmt->fmt.pix.field = field;
+ fmt->fmt.pix.width = width;
+ fmt->fmt.pix.height = height;
+ fmt->fmt.pix.sizeimage = 0;
+ fmt->fmt.pix.bytesperline = 0;
+ }
+
+ ret = ioctl(ctx->fd, VIDIOC_S_FMT, fmt);
+ if (ret)
+ av_log(NULL, AV_LOG_ERROR, "VIDIOC_S_FMT failed: %d\n", ret);
+
+ else if (!V4L2_TYPE_IS_OUTPUT(queue->format.type)) {
+ if (V4L2_TYPE_IS_MULTIPLANAR(fmt->type) && fmt->fmt.pix_mp.pixelformat != v4l2_pix_fmt) {
+ ctx->drm_out_format = drm_format_from_v4l2_pix_fmt(fmt->fmt.pix_mp.pixelformat);
+ av_log(NULL, AV_LOG_DEBUG, "%s driver updated v4l2_pixfmt from: %x to %x, so now using %llx as drm output format\n",
+ __func__, v4l2_pix_fmt, fmt->fmt.pix_mp.pixelformat, ctx->drm_out_format);
+ } else if (fmt->fmt.pix.pixelformat != v4l2_pix_fmt) {
+ ctx->drm_out_format = drm_format_from_v4l2_pix_fmt(fmt->fmt.pix.pixelformat);
+ av_log(NULL, AV_LOG_DEBUG, "%s driver updated v4l2_pixfmt from: %x to %x, so now using %llx as drm output format\n",
+ __func__, v4l2_pix_fmt, fmt->fmt.pix.pixelformat, ctx->drm_out_format);
+ }
+ }
+
+ return ret;
+}
+
+static int deint_v4l2m2m_probe_device(DeintV4L2M2MContextShared *ctx, char *node)
+{
+ int ret;
+
+ ctx->fd = open(node, O_RDWR | O_NONBLOCK, 0);
+ if (ctx->fd < 0)
+ return AVERROR(errno);
+
+ ret = deint_v4l2m2m_prepare_context(ctx);
+ if (ret)
+ goto fail;
+
+ ret = deint_v4l2m2m_try_format(&ctx->capture, ctx->drm_out_format);
+ if (ret)
+ goto fail;
+
+ ret = deint_v4l2m2m_try_format(&ctx->output, ctx->drm_in_format);
+ if (ret)
+ goto fail;
+
+ return 0;
+
+fail:
+ close(ctx->fd);
+ ctx->fd = -1;
+
+ return ret;
+}
+
+static int deint_v4l2m2m_find_device(DeintV4L2M2MContextShared *ctx)
+{
+ int ret = AVERROR(EINVAL);
+ struct dirent *entry;
+ char node[PATH_MAX];
+ DIR *dirp;
+
+ dirp = opendir("/dev");
+ if (!dirp)
+ return AVERROR(errno);
+
+ for (entry = readdir(dirp); entry; entry = readdir(dirp)) {
+
+ if (strncmp(entry->d_name, "video", 5))
+ continue;
+
+ snprintf(node, sizeof(node), "/dev/%s", entry->d_name);
+ av_log(NULL, AV_LOG_DEBUG, "probing device %s\n", node);
+ ret = deint_v4l2m2m_probe_device(ctx, node);
+ if (!ret)
+ break;
+ }
+
+ closedir(dirp);
+
+ if (ret) {
+ av_log(NULL, AV_LOG_ERROR, "Could not find a valid device\n");
+ ctx->fd = -1;
+
+ return ret;
+ }
+
+ av_log(NULL, AV_LOG_INFO, "Using device %s\n", node);
+
+ return 0;
+}
+
+static int deint_v4l2m2m_enqueue_buffer(V4L2Buffer *buf)
+{
+ int ret;
+
+ ret = ioctl(buf->q->ctx->fd, VIDIOC_QBUF, &buf->buffer);
+ if (ret < 0)
+ return AVERROR(errno);
+
+ buf->enqueued = 1;
+
+ return 0;
+}
+
+static int v4l2_buffer_export_drm(V4L2Buffer* avbuf, uint64_t drm_format)
+{
+ struct v4l2_exportbuffer expbuf;
+ int i, ret;
+
+ for (i = 0; i < avbuf->num_planes; i++) {
+ memset(&expbuf, 0, sizeof(expbuf));
+
+ expbuf.index = avbuf->buffer.index;
+ expbuf.type = avbuf->buffer.type;
+ expbuf.plane = i;
+
+ ret = ioctl(avbuf->q->ctx->fd, VIDIOC_EXPBUF, &expbuf);
+ if (ret < 0)
+ return AVERROR(errno);
+
+ avbuf->fd = expbuf.fd;
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(avbuf->buffer.type)) {
+ /* drm frame */
+ avbuf->drm_frame.objects[i].size = avbuf->buffer.m.planes[i].length;
+ avbuf->drm_frame.objects[i].fd = expbuf.fd;
+ avbuf->drm_frame.objects[i].format_modifier = drm_format_modifier(drm_format);
+ } else {
+ /* drm frame */
+ avbuf->drm_frame.objects[0].size = avbuf->buffer.length;
+ avbuf->drm_frame.objects[0].fd = expbuf.fd;
+ avbuf->drm_frame.objects[0].format_modifier = drm_format_modifier(drm_format);
+ }
+ }
+
+ return 0;
+}
+
+static int deint_v4l2m2m_allocate_buffers(V4L2Queue *queue)
+{
+ struct v4l2_format *fmt = &queue->format;
+ DeintV4L2M2MContextShared *ctx = queue->ctx;
+ struct v4l2_requestbuffers req;
+ int ret, i, j, multiplanar;
+ uint32_t memory;
+
+ memory = V4L2_TYPE_IS_OUTPUT(fmt->type) ?
+ V4L2_MEMORY_DMABUF : V4L2_MEMORY_MMAP;
+
+ multiplanar = V4L2_TYPE_IS_MULTIPLANAR(fmt->type);
+
+ memset(&req, 0, sizeof(req));
+ req.count = queue->num_buffers;
+ req.memory = memory;
+ req.type = fmt->type;
+
+ ret = ioctl(ctx->fd, VIDIOC_REQBUFS, &req);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR, "VIDIOC_REQBUFS failed: %s\n", strerror(errno));
+
+ return AVERROR(errno);
+ }
+
+ queue->num_buffers = req.count;
+ queue->buffers = av_mallocz(queue->num_buffers * sizeof(V4L2Buffer));
+ if (!queue->buffers) {
+ av_log(NULL, AV_LOG_ERROR, "malloc enomem\n");
+
+ return AVERROR(ENOMEM);
+ }
+
+ for (i = 0; i < queue->num_buffers; i++) {
+ V4L2Buffer *buf = &queue->buffers[i];
+
+ buf->enqueued = 0;
+ buf->fd = -1;
+ buf->q = queue;
+
+ buf->buffer.type = fmt->type;
+ buf->buffer.memory = memory;
+ buf->buffer.index = i;
+
+ if (multiplanar) {
+ buf->buffer.length = VIDEO_MAX_PLANES;
+ buf->buffer.m.planes = buf->planes;
+ }
+
+ ret = ioctl(ctx->fd, VIDIOC_QUERYBUF, &buf->buffer);
+ if (ret < 0) {
+ ret = AVERROR(errno);
+
+ goto fail;
+ }
+
+ if (multiplanar)
+ buf->num_planes = buf->buffer.length;
+ else
+ buf->num_planes = 1;
+
+ for (j = 0; j < buf->num_planes; j++) {
+ V4L2PlaneInfo *info = &buf->plane_info[j];
+
+ if (multiplanar) {
+ info->bytesperline = fmt->fmt.pix_mp.plane_fmt[j].bytesperline;
+ info->length = buf->buffer.m.planes[j].length;
+ } else {
+ info->bytesperline = fmt->fmt.pix.bytesperline;
+ info->length = buf->buffer.length;
+ }
+ }
+
+ if (!V4L2_TYPE_IS_OUTPUT(fmt->type)) {
+ ret = deint_v4l2m2m_enqueue_buffer(buf);
+ if (ret)
+ goto fail;
+
+ ret = v4l2_buffer_export_drm(buf, ctx->drm_out_format);
+ if (ret)
+ goto fail;
+ }
+ }
+
+ return 0;
+
+fail:
+ for (i = 0; i < queue->num_buffers; i++)
+ if (queue->buffers[i].fd >= 0)
+ close(queue->buffers[i].fd);
+ av_free(queue->buffers);
+ queue->buffers = NULL;
+
+ return ret;
+}
+
+static int deint_v4l2m2m_streamon(V4L2Queue *queue)
+{
+ int type = queue->format.type;
+ int ret;
+
+ ret = ioctl(queue->ctx->fd, VIDIOC_STREAMON, &type);
+ if (ret < 0)
+ return AVERROR(errno);
+
+ return 0;
+}
+
+static int deint_v4l2m2m_streamoff(V4L2Queue *queue)
+{
+ int type = queue->format.type;
+ int ret;
+
+ ret = ioctl(queue->ctx->fd, VIDIOC_STREAMOFF, &type);
+ if (ret < 0)
+ return AVERROR(errno);
+
+ return 0;
+}
+
+static V4L2Buffer* deint_v4l2m2m_dequeue_buffer(V4L2Queue *queue, int timeout)
+{
+ struct v4l2_plane planes[VIDEO_MAX_PLANES];
+ DeintV4L2M2MContextShared *ctx = queue->ctx;
+ struct v4l2_buffer buf = { 0 };
+ V4L2Buffer* avbuf = NULL;
+ struct pollfd pfd;
+ short events;
+ int ret;
+
+ if (V4L2_TYPE_IS_OUTPUT(queue->format.type))
+ events = POLLOUT | POLLWRNORM;
+ else
+ events = POLLIN | POLLRDNORM;
+
+ pfd.events = events;
+ pfd.fd = ctx->fd;
+
+ for (;;) {
+ ret = poll(&pfd, 1, timeout);
+ if (ret > 0)
+ break;
+ if (errno == EINTR)
+ continue;
+ return NULL;
+ }
+
+ if (pfd.revents & POLLERR)
+ return NULL;
+
+ if (pfd.revents & events) {
+ memset(&buf, 0, sizeof(buf));
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.type = queue->format.type;
+ if (V4L2_TYPE_IS_MULTIPLANAR(queue->format.type)) {
+ memset(planes, 0, sizeof(planes));
+ buf.length = VIDEO_MAX_PLANES;
+ buf.m.planes = planes;
+ }
+
+ ret = ioctl(ctx->fd, VIDIOC_DQBUF, &buf);
+ if (ret) {
+ if (errno != EAGAIN)
+ av_log(NULL, AV_LOG_DEBUG, "VIDIOC_DQBUF, errno (%s)\n",
+ av_err2str(AVERROR(errno)));
+ return NULL;
+ }
+
+ avbuf = &queue->buffers[buf.index];
+ avbuf->enqueued = 0;
+ avbuf->buffer = buf;
+ if (V4L2_TYPE_IS_MULTIPLANAR(queue->format.type)) {
+ memcpy(avbuf->planes, planes, sizeof(planes));
+ avbuf->buffer.m.planes = avbuf->planes;
+ }
+
+ return avbuf;
+ }
+
+ return NULL;
+}
+
+static V4L2Buffer *deint_v4l2m2m_find_free_buf(V4L2Queue *queue)
+{
+ int i;
+
+ for (i = 0; i < queue->num_buffers; i++)
+ if (!queue->buffers[i].enqueued)
+ return &queue->buffers[i];
+
+ return NULL;
+}
+
+static int deint_v4l2m2m_enqueue(V4L2Queue *queue, const AVFrame* frame)
+{
+ AVDRMFrameDescriptor *drm_desc = (AVDRMFrameDescriptor *)frame->data[0];
+ V4L2Buffer *buf;
+ int i;
+
+ if (V4L2_TYPE_IS_OUTPUT(queue->format.type))
+ while (deint_v4l2m2m_dequeue_buffer(queue, 0));
+
+ buf = deint_v4l2m2m_find_free_buf(queue);
+ if (!buf)
+ return AVERROR(ENOMEM);
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(buf->buffer.type))
+ for (i = 0; i < drm_desc->nb_objects; i++)
+ buf->buffer.m.planes[i].m.fd = drm_desc->objects[i].fd;
+ else
+ buf->buffer.m.fd = drm_desc->objects[0].fd;
+
+ return deint_v4l2m2m_enqueue_buffer(buf);
+}
+
+static void deint_v4l2m2m_destroy_context(DeintV4L2M2MContextShared *ctx)
+{
+ if (atomic_fetch_sub(&ctx->refcount, 1) == 1) {
+ V4L2Queue *capture = &ctx->capture;
+ V4L2Queue *output = &ctx->output;
+ int i;
+
+ av_log(NULL, AV_LOG_DEBUG, "%s - destroying context\n", __func__);
+
+ if (ctx->fd >= 0) {
+ deint_v4l2m2m_streamoff(capture);
+ deint_v4l2m2m_streamoff(output);
+ }
+
+ if (capture->buffers)
+ for (i = 0; i < capture->num_buffers; i++) {
+ capture->buffers[i].q = NULL;
+ if (capture->buffers[i].fd >= 0)
+ close(capture->buffers[i].fd);
+ }
+
+ if (ctx->cur_in_frame)
+ av_frame_free(&ctx->cur_in_frame);
+
+ if (ctx->prev_in_frame)
+ av_frame_free(&ctx->prev_in_frame);
+
+ av_buffer_unref(&ctx->hw_frames_ctx);
+
+ if (capture->buffers)
+ av_free(capture->buffers);
+
+ if (output->buffers)
+ av_free(output->buffers);
+
+ if (ctx->fd >= 0) {
+ close(ctx->fd);
+ ctx->fd = -1;
+ }
+
+ av_free(ctx);
+ }
+}
+
+static void v4l2_free_buffer(void *opaque, uint8_t *unused)
+{
+ V4L2Buffer *buf = opaque;
+ DeintV4L2M2MContextShared *ctx = buf->q->ctx;
+
+ if (!ctx->done)
+ deint_v4l2m2m_enqueue_buffer(buf);
+
+ deint_v4l2m2m_destroy_context(ctx);
+}
+
+static uint8_t *v4l2_get_drm_frame(V4L2Buffer *avbuf, int height, uint64_t drm_format)
+{
+ AVDRMFrameDescriptor *drm_desc = &avbuf->drm_frame;
+ AVDRMLayerDescriptor *layer;
+
+ /* fill the DRM frame descriptor */
+ drm_desc->nb_objects = avbuf->num_planes;
+ drm_desc->nb_layers = 1;
+
+ layer = &drm_desc->layers[0];
+ layer->nb_planes = avbuf->num_planes;
+
+ for (int i = 0; i < avbuf->num_planes; i++) {
+ layer->planes[i].object_index = i;
+ layer->planes[i].offset = 0;
+ layer->planes[i].pitch = avbuf->plane_info[i].bytesperline;
+ }
+
+ layer->format = drm_format;
+
+ if (avbuf->num_planes == 1) {
+ layer->nb_planes = 2;
+
+ layer->planes[1].object_index = 0;
+ layer->planes[1].offset = avbuf->plane_info[0].bytesperline * height;
+ layer->planes[1].pitch = avbuf->plane_info[0].bytesperline;
+ }
+
+ return (uint8_t *)drm_desc;
+}
+
+static int deint_v4l2m2m_dequeue_frame(V4L2Queue *queue, AVFrame* frame, int timeout)
+{
+ DeintV4L2M2MContextShared *ctx = queue->ctx;
+ V4L2Buffer* avbuf;
+
+ avbuf = deint_v4l2m2m_dequeue_buffer(queue, timeout);
+ if (!avbuf) {
+ av_log(NULL, AV_LOG_ERROR, "dequeueing failed\n");
+ return AVERROR(EINVAL);
+ }
+
+ frame->buf[0] = av_buffer_create((uint8_t *) &avbuf->drm_frame,
+ sizeof(avbuf->drm_frame), v4l2_free_buffer,
+ avbuf, AV_BUFFER_FLAG_READONLY);
+ if (!frame->buf[0])
+ return AVERROR(ENOMEM);
+
+ atomic_fetch_add(&ctx->refcount, 1);
+
+ frame->data[0] = (uint8_t *)v4l2_get_drm_frame(avbuf, ctx->orig_height, ctx->drm_out_format);
+ frame->format = AV_PIX_FMT_DRM_PRIME;
+ frame->hw_frames_ctx = av_buffer_ref(ctx->hw_frames_ctx);
+ frame->height = ctx->height;
+ frame->width = ctx->width;
+
+ if (avbuf->buffer.flags & V4L2_BUF_FLAG_ERROR) {
+ av_log(NULL, AV_LOG_ERROR, "driver decode error\n");
+ frame->decode_error_flags |= FF_DECODE_ERROR_INVALID_BITSTREAM;
+ }
+
+ return 0;
+}
+
+static int deint_v4l2m2m_dequeue(AVFilterContext *avctx, AVFrame *input_frame)
+{
+ DeintV4L2M2MContext *priv = avctx->priv;
+ DeintV4L2M2MContextShared *ctx = priv->shared;
+ AVFilterLink *outlink = avctx->outputs[0];
+ AVFrame *output_frame_1, *output_frame_2;
+ int64_t first_pts = AV_NOPTS_VALUE;
+ int err;
+
+ av_log(priv, AV_LOG_DEBUG, "input pts: %"PRId64" (field %d)\n",
+ input_frame->pts, ctx->field_order);
+
+ output_frame_1 = av_frame_alloc();
+ if (!output_frame_1)
+ return AVERROR(ENOMEM);
+
+ err = deint_v4l2m2m_dequeue_frame(&ctx->capture, output_frame_1, 500);
+ if (err < 0) {
+ av_log(priv, AV_LOG_ERROR, "no 1st frame (field %d)\n", ctx->field_order);
+ goto fail_out1;
+ }
+
+ err = av_frame_copy_props(output_frame_1, input_frame);
+ if (err < 0)
+ goto fail_out1;
+
+ output_frame_1->interlaced_frame = 0;
+
+ output_frame_2 = av_frame_alloc();
+ if (!output_frame_2) {
+ err = AVERROR(ENOMEM);
+ goto fail_out1;
+ }
+
+ err = deint_v4l2m2m_dequeue_frame(&ctx->capture, output_frame_2, 500);
+ if (err < 0) {
+ av_log(priv, AV_LOG_ERROR, "no 2nd frame (field %d)\n", ctx->field_order);
+ goto fail_out2;
+ }
+
+ err = av_frame_copy_props(output_frame_2, input_frame);
+ if (err < 0)
+ goto fail_out2;
+
+ output_frame_2->interlaced_frame = 0;
+
+ if (ctx->prev_in_frame && ctx->prev_in_frame->pts != AV_NOPTS_VALUE
+ && input_frame->pts != AV_NOPTS_VALUE) {
+ first_pts = (ctx->prev_in_frame->pts + input_frame->pts) / 2;
+ av_log(priv, AV_LOG_DEBUG, "calculated first pts %"PRId64"\n", first_pts);
+ }
+
+ output_frame_1->pts = first_pts;
+
+ err = ff_filter_frame(outlink, output_frame_1);
+ if (err < 0) {
+ av_frame_free(&output_frame_2);
+ return err;
+ }
+ err = ff_filter_frame(outlink, output_frame_2);
+
+ if (err < 0)
+ return err;
+
+ av_log(priv, AV_LOG_DEBUG, "1st frame pts: %"PRId64" 2nd frame pts: %"PRId64" first pts: %"PRId64" (field %d)\n",
+ output_frame_1->pts, output_frame_2->pts, first_pts, ctx->field_order);
+
+ return 0;
+
+fail_out2:
+ av_frame_free(&output_frame_2);
+fail_out1:
+ av_frame_free(&output_frame_1);
+ return err;
+}
+
+static int deint_v4l2m2m_config_props(AVFilterLink *outlink)
+{
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ AVFilterContext *avctx = outlink->src;
+ DeintV4L2M2MContext *priv = avctx->priv;
+ DeintV4L2M2MContextShared *ctx = priv->shared;
+ int ret;
+
+ ctx->height = avctx->inputs[0]->h;
+ ctx->width = avctx->inputs[0]->w;
+
+ outlink->frame_rate = av_mul_q(inlink->frame_rate,
+ (AVRational){ 2, 1 });
+ outlink->time_base = av_mul_q(inlink->time_base,
+ (AVRational){ 1, 2 });
+
+ ret = deint_v4l2m2m_find_device(ctx);
+ if (ret)
+ return ret;
+
+ if (!inlink->hw_frames_ctx) {
+ av_log(priv, AV_LOG_ERROR, "No hw context provided on input\n");
+ return AVERROR(EINVAL);
+ }
+
+ ctx->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
+ if (!ctx->hw_frames_ctx)
+ return AVERROR(ENOMEM);
+
+ return 0;
+}
+
+static int deint_v4l2m2m_query_formats(AVFilterContext *avctx)
+{
+ static const enum AVPixelFormat pixel_formats[] = {
+ AV_PIX_FMT_DRM_PRIME,
+ AV_PIX_FMT_NONE,
+ };
+
+ return ff_set_common_formats(avctx, ff_make_format_list(pixel_formats));
+}
+
+static int deint_v4l2m2m_filter_frame(AVFilterLink *link, AVFrame *in)
+{
+ AVFilterContext *avctx = link->dst;
+ DeintV4L2M2MContext *priv = avctx->priv;
+ DeintV4L2M2MContextShared *ctx = priv->shared;
+ V4L2Queue *capture = &ctx->capture;
+ V4L2Queue *output = &ctx->output;
+ int ret;
+
+ av_log(priv, AV_LOG_DEBUG, "input pts: %"PRId64" field :%d interlaced: %d\n",
+ in->pts, in->top_field_first, in->interlaced_frame);
+
+ ctx->cur_in_frame = in;
+
+ if (ctx->field_order == V4L2_FIELD_ANY) {
+ AVDRMFrameDescriptor *drm_desc = (AVDRMFrameDescriptor *)in->data[0];
+ ctx->orig_width = drm_desc->layers[0].planes[0].pitch;
+ ctx->orig_height = drm_desc->layers[0].planes[1].offset / ctx->orig_width;
+ ctx->drm_in_format = drm_desc->layers->format;
+ ctx->drm_out_format = drm_desc->layers->format;
+
+ if (in->top_field_first)
+ ctx->field_order = V4L2_FIELD_INTERLACED_TB;
+ else
+ ctx->field_order = V4L2_FIELD_INTERLACED_BT;
+
+ ret = deint_v4l2m2m_set_format(output, ctx->field_order,
+ ctx->orig_width, ctx->orig_height,
+ ctx->drm_in_format);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_set_format(capture, V4L2_FIELD_NONE,
+ ctx->orig_width, ctx->orig_height,
+ ctx->drm_out_format);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_allocate_buffers(capture);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_streamon(capture);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_allocate_buffers(output);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_streamon(output);
+ if (ret)
+ return ret;
+ }
+
+ ret = deint_v4l2m2m_enqueue(output, in);
+ if (ret)
+ return ret;
+
+ ret = deint_v4l2m2m_dequeue(avctx, in);
+ if (ret)
+ return ret;
+
+ if (ctx->prev_in_frame)
+ av_frame_free(&ctx->prev_in_frame);
+
+ ctx->prev_in_frame = in;
+ ctx->cur_in_frame = NULL;
+
+ return 0;
+}
+
+static av_cold int deint_v4l2m2m_init(AVFilterContext *avctx)
+{
+ DeintV4L2M2MContext *priv = avctx->priv;
+ DeintV4L2M2MContextShared *ctx;
+
+ ctx = av_mallocz(sizeof(DeintV4L2M2MContextShared));
+ if (!ctx)
+ return AVERROR(ENOMEM);
+
+ priv->shared = ctx;
+ ctx->fd = -1;
+ ctx->output.ctx = ctx;
+ ctx->output.num_buffers = 6;
+ ctx->capture.ctx = ctx;
+ ctx->capture.num_buffers = 6;
+ ctx->done = 0;
+ ctx->field_order = V4L2_FIELD_ANY;
+ ctx->cur_in_frame = NULL;
+ ctx->prev_in_frame = NULL;
+ ctx->drm_in_format = DRM_FORMAT_NV12;
+ ctx->drm_out_format = DRM_FORMAT_NV12;
+ atomic_init(&ctx->refcount, 1);
+
+ return 0;
+}
+
+static void deint_v4l2m2m_uninit(AVFilterContext *avctx)
+{
+ DeintV4L2M2MContext *priv = avctx->priv;
+ DeintV4L2M2MContextShared *ctx = priv->shared;
+
+ ctx->done = 1;
+ deint_v4l2m2m_destroy_context(ctx);
+}
+
+static const AVOption deinterlace_v4l2m2m_options[] = {
+ { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(deinterlace_v4l2m2m);
+
+static const AVFilterPad deint_v4l2m2m_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = deint_v4l2m2m_filter_frame,
+ },
+};
+
+static const AVFilterPad deint_v4l2m2m_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = deint_v4l2m2m_config_props,
+ },
+};
+
+AVFilter ff_vf_deinterlace_v4l2m2m = {
+ .name = "deinterlace_v4l2m2m",
+ .description = NULL_IF_CONFIG_SMALL("V4L2 M2M deinterlacer"),
+ .priv_size = sizeof(DeintV4L2M2MContext),
+ .init = &deint_v4l2m2m_init,
+ .uninit = &deint_v4l2m2m_uninit,
+ FILTER_QUERY_FUNC(&deint_v4l2m2m_query_formats),
+ FILTER_INPUTS(deint_v4l2m2m_inputs),
+ FILTER_OUTPUTS(deint_v4l2m2m_outputs),
+ .priv_class = &deinterlace_v4l2m2m_class,
+};
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