[vlc-devel] [PATCH v4] linux: kernel mode setting (KMS) vout plugin
Juha-Pekka Heikkila
juhapekka.heikkila at gmail.com
Mon Jun 11 14:34:20 CEST 2018
Add new kernel mode setting video output plugin.
By default it tries to match vlc suggested video mode to anything
kms api offers. There are command line parameters to control
which video format to use for both vlc and for drm.
kms-vlc-chroma parameter to force VLC to use FourCC as output.
kms-drm-chroma parameter to overide DRM requested framebuffer type.
v4: rebase
v3: Increased HW frame amount to 3 to be able to reduce stall
from kernel. HW frame amount can be now changed by changing
defined MAXHWBUF. General cleanup.
Rémi Denis-Courmont: I kept module description in beginning
of kms.c, otherwise my plugin look different from all other
plugins in this. I changed desciption for my commandline
parameters in hope to underline their different function.
Destruction of HW buffers is now moved to picture destroy
callback.
v2, Rémi Denis-Courmont: Multiple picture pools are gone as well as
TTY code which I found out I don't need.
vlc_fourcc_GetYUVFallback/vlc_fourcc_GetRGBFallback I didn't find
easy way to do back'n'forth mapping of what kernel offers and what
vlc offers thus I have simple table of most common formats which
my plugin uses to find 'best' match.
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
---
configure.ac | 5 +
modules/video_output/Makefile.am | 10 +
modules/video_output/kms.c | 829 +++++++++++++++++++++++++++++++++++++++
3 files changed, 844 insertions(+)
create mode 100644 modules/video_output/kms.c
diff --git a/configure.ac b/configure.ac
index dfb8ecd..564c32b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3392,6 +3392,11 @@ AC_CHECK_HEADER([linux/fb.h], [
])
dnl
+dnl Linux kernel mode setting module
+dnl
+PKG_ENABLE_MODULES_VLC([KMS], [], [libdrm >= 2.4.83], [Linux kernel mode setting output], [auto])
+
+dnl
dnl libcaca plugin
dnl
PKG_ENABLE_MODULES_VLC([CACA], [], [caca >= 0.99.beta14], [libcaca output],[auto])
diff --git a/modules/video_output/Makefile.am b/modules/video_output/Makefile.am
index 5d18a36..2be8758 100644
--- a/modules/video_output/Makefile.am
+++ b/modules/video_output/Makefile.am
@@ -422,6 +422,16 @@ EXTRA_LTLIBRARIES += libfb_plugin.la
vout_LTLIBRARIES += $(LTLIBfb)
+### Kernel Mode Setting ###
+
+libkms_plugin_la_SOURCES = video_output/kms.c
+libkms_plugin_la_CFLAGS = $(AM_CFLAGS) $(KMS_CFLAGS)
+libkms_plugin_la_LIBADD = $(KMS_LIBS)
+libkms_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)'
+EXTRA_LTLIBRARIES += libkms_plugin.la
+vout_LTLIBRARIES += $(LTLIBkms)
+
+
### Coloured ASCII art ###
libcaca_plugin_la_SOURCES = video_output/caca.c
libcaca_plugin_la_CFLAGS = $(AM_CFLAGS) $(CACA_CFLAGS)
diff --git a/modules/video_output/kms.c b/modules/video_output/kms.c
new file mode 100644
index 0000000..e26c38b
--- /dev/null
+++ b/modules/video_output/kms.c
@@ -0,0 +1,829 @@
+/*****************************************************************************
+ * kms.c : kernel mode setting plugin for vlc
+ *****************************************************************************
+ * Copyright © 2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+#include <drm_fourcc.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_vout_display.h>
+#include <vlc_picture_pool.h>
+#include <vlc_fs.h>
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define KMS_VAR "kms"
+
+#define DEVICE_TEXT N_("Framebuffer device")
+#define DEVICE_LONGTEXT N_(\
+ "Framebuffer device to use for rendering (usually /dev/dri/card0).")
+
+#define VLC_CHROMA_TEXT N_("Image format used by VLC")
+#define VLC_CHROMA_LONGTEXT N_("Chroma fourcc request to VLC for output format")
+
+#define DRM_CHROMA_TEXT N_("Image format used by DRM")
+#define DRM_CHROMA_LONGTEXT N_("Chroma fourcc override for DRM framebuffer format selection")
+
+static int Open (vlc_object_t *);
+static void Close(vlc_object_t *);
+
+vlc_module_begin ()
+ set_shortname("kms")
+ set_category(CAT_VIDEO)
+ set_subcategory(SUBCAT_VIDEO_VOUT)
+ add_loadfile(KMS_VAR, "/dev/dri/card0", DEVICE_TEXT, DEVICE_LONGTEXT)
+
+ add_string( "kms-vlc-chroma", NULL, VLC_CHROMA_TEXT, VLC_CHROMA_LONGTEXT,
+ true)
+ add_string( "kms-drm-chroma", NULL, DRM_CHROMA_TEXT, DRM_CHROMA_LONGTEXT,
+ true)
+ set_description(N_("Linux kernel mode setting video output"))
+ set_capability("vout display", 30)
+ set_callbacks(Open, Close)
+vlc_module_end ()
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+
+/*
+ * how many hw buffers are allocated for page flipping. I think
+ * 3 is enough so we shouldn't get unexpected stall from kernel.
+ */
+#define MAXHWBUF 3
+
+typedef enum { drvSuccess, drvTryNext, drvFail } deviceRval;
+
+struct vout_display_sys_t {
+/*
+ * buffer information
+ */
+ uint32_t width;
+ uint32_t height;
+ uint32_t stride;
+ uint32_t size;
+ uint32_t offsets[PICTURE_PLANE_MAX];
+
+ uint32_t handle[MAXHWBUF];
+ uint8_t *map[MAXHWBUF];
+
+ uint32_t fb[MAXHWBUF];
+ picture_t *picture;
+ picture_pool_t *pool;
+
+ unsigned int front_buf;
+
+ bool forced_drm_fourcc;
+ uint32_t drm_fourcc;
+ vlc_fourcc_t vlc_fourcc;
+
+/*
+ * modeset information
+ */
+ uint32_t crtc;
+ uint32_t plane_id;
+
+/*
+ * other generic stuff
+ */
+ int drm_fd;
+};
+
+typedef struct {
+ vout_display_sys_t *p_voutsys;
+} picture_sys_t;
+
+
+static void DestroyFB(vout_display_sys_t const *sys, uint32_t const buf)
+{
+ struct drm_mode_destroy_dumb destroy_req = { .handle = sys->handle[buf] };
+
+ munmap(sys->map[buf], sys->size);
+ drmModeRmFB(sys->drm_fd, sys->fb[buf]);
+ drmIoctl(sys->drm_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_req);
+}
+
+
+#define ALIGN(v, a) (((v) + (a)-1) & ~((a)-1))
+
+static deviceRval CreateFB(vout_display_t *vd, const int buf)
+{
+ vout_display_sys_t *sys = vd->sys;
+ struct drm_mode_create_dumb create_req = { .width = sys->width*2,
+ .height = sys->height,
+ .bpp = 16 };
+ struct drm_mode_destroy_dumb destroy_req;
+ struct drm_mode_map_dumb modify_req = {};
+ unsigned int tile_width = 512, tile_height = 16;
+ deviceRval ret;
+ int i;
+ uint32_t offsets[] = {0,0,0,0}, handles[] = {0,0,0,0},
+ pitches[] = {0,0,0,0};
+
+ switch(sys->drm_fourcc) {
+#ifdef DRM_FORMAT_P010
+ case DRM_FORMAT_P010:
+#endif
+#ifdef DRM_FORMAT_P012
+ case DRM_FORMAT_P012:
+#endif
+#ifdef DRM_FORMAT_P016
+ case DRM_FORMAT_P016:
+#endif
+#if defined(DRM_FORMAT_P010) || defined(DRM_FORMAT_P012) || defined(DRM_FORMAT_P016)
+ sys->stride = ALIGN(sys->width*2, tile_width);
+ sys->offsets[1] = sys->stride*ALIGN(sys->height, tile_height);
+ create_req.height = ALIGN(sys->height*2, tile_height);
+ break;
+#endif
+ case DRM_FORMAT_NV12:
+ sys->stride = ALIGN(sys->width, tile_width);
+ sys->offsets[1] = sys->stride*ALIGN(sys->height, tile_height);
+ create_req.height = ALIGN(sys->height*2, tile_height);
+ break;
+ default:
+ create_req.height = ALIGN(sys->height*2, tile_height);
+
+ /*
+ * width *4 so there's enough space for anything.
+ */
+ sys->stride = ALIGN(sys->width*4, tile_width);
+ break;
+ }
+
+ ret = drmIoctl(sys->drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_req);
+ if (ret < 0) {
+ msg_Err(vd, "Cannot create dumb buffer");
+ return drvFail;
+ }
+
+ sys->size = create_req.size;
+ sys->handle[buf] = create_req.handle;
+
+ /*
+ * create framebuffer object for the dumb-buffer
+ * index 0 has to be filled in any case.
+ */
+ for (i = 0; i < 4 && (sys->offsets[i] || i < 1); i++) {
+ handles[i] = create_req.handle;
+ pitches[i] = sys->stride;
+ offsets[i] = sys->offsets[i];
+ }
+
+ ret = drmModeAddFB2(sys->drm_fd, sys->width, sys->height, sys->drm_fourcc,
+ handles, pitches, offsets, &sys->fb[buf], 1<<1);
+
+ if (ret) {
+ msg_Err(vd, "Cannot create frame buffer");
+ ret = drvFail;
+ goto err_destroy;
+ }
+
+ modify_req.handle = sys->handle[buf];
+ ret = drmIoctl(sys->drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &modify_req);
+ if (ret) {
+ msg_Err(vd, "Cannot map dumb buffer");
+ ret = drvFail;
+ goto err_fb;
+ }
+
+ sys->map[buf] = mmap(0, sys->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ sys->drm_fd, modify_req.offset);
+
+ if (sys->map[buf] == MAP_FAILED) {
+ msg_Err(vd, "Cannot mmap dumb buffer");
+ ret = drvFail;
+ goto err_fb;
+ }
+ return drvSuccess;
+
+err_fb:
+ drmModeRmFB(sys->drm_fd, sys->fb[buf]);
+ sys->fb[buf] = 0;
+
+err_destroy:
+ memset(&destroy_req, 0, sizeof(destroy_req));
+ destroy_req.handle = sys->handle[buf];
+ drmIoctl(sys->drm_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_req);
+ return ret;
+}
+
+
+static deviceRval FindCRTC(vout_display_t *vd, drmModeRes const *res,
+ drmModeConnector const *conn)
+{
+ vout_display_sys_t *sys = vd->sys;
+ drmModeEncoder *enc;
+ int i, j;
+
+ /*
+ * Try current encoder and CRTC combo
+ */
+ if (conn->encoder_id) {
+ enc = drmModeGetEncoder(sys->drm_fd, conn->encoder_id);
+ if (enc) {
+ if (enc->crtc_id) {
+ msg_Dbg(vd, "Got CRTC %d from current encoder", enc->crtc_id);
+
+ sys->crtc = enc->crtc_id;
+ drmModeFreeEncoder(enc);
+ return drvSuccess;
+ }
+ drmModeFreeEncoder(enc);
+ }
+ }
+
+ /*
+ * Iterate all available encoders to find CRTC
+ */
+ for (i = 0; i < conn->count_encoders; i++) {
+ enc = drmModeGetEncoder(sys->drm_fd, conn->encoders[i]);
+
+ for (j = 0; enc && j < res->count_crtcs; ++j) {
+ if (ffs(enc->possible_crtcs) == j && res->crtcs[j]) {
+ msg_Dbg(vd, "Got CRTC %d", res->crtcs[j]);
+ sys->crtc = res->crtcs[j];
+ drmModeFreeEncoder(enc);
+ return drvSuccess;
+ }
+ }
+ drmModeFreeEncoder(enc);
+ }
+
+ msg_Err(vd , "Cannot find CRTC for connector %d", conn->connector_id);
+ return drvTryNext;
+}
+
+
+static deviceRval SetupDevice(vout_display_t *vd, drmModeRes const *res,
+ drmModeConnector const *conn)
+{
+ vout_display_sys_t *sys = vd->sys;
+ deviceRval ret;
+ int c, c2;
+
+ if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0)
+ return drvTryNext;
+
+ sys->width = conn->modes[0].hdisplay;
+ sys->height = conn->modes[0].vdisplay;
+ msg_Dbg(vd, "Mode resolution for connector %u is %ux%u",
+ conn->connector_id, sys->width, sys->height);
+
+ ret = FindCRTC(vd, res, conn);
+ if (ret != drvSuccess) {
+ msg_Dbg(vd , "No valid CRTC for connector %d", conn->connector_id);
+ return ret;
+ }
+
+ for (c = 0; c < MAXHWBUF; c++) {
+ ret = CreateFB(vd, c);
+ if (ret != drvSuccess) {
+ msg_Err(vd, "Cannot create framebuffer %d for connector %d", c,
+ conn->connector_id);
+ for (c2 = 0; c2 < c; c2++)
+ DestroyFB(sys, c2);
+
+ return ret;
+ } else {
+ msg_Dbg(vd, "Created HW framebuffer %d/%d", c+1, MAXHWBUF);
+ }
+ }
+ return drvSuccess;
+}
+
+
+/** fourccmatching, matching drm to vlc fourccs and see if it was present
+ * in HW. Here really is two lists, one in RGB and second in YUV. They're
+ * listed in order of preference.
+ *
+ * fourccmatching::drm DRM fourcc code from drm_fourcc.h
+ * fourccmatching::vlc VLC fourcc code from vlc_fourcc.h under title 'Chromas'
+ * fourccmatching::plane_id from which plane this DRM fourcc was found
+ * fourccmatching::present if this mode was available in HW
+ * fourccmatching::isYUV as name suggest..
+ */
+static struct
+{
+ uint32_t drm;
+ vlc_fourcc_t vlc;
+ uint32_t plane_id;
+ bool present;
+ bool isYUV;
+} fourccmatching[] = {
+ { .drm = DRM_FORMAT_XRGB8888, .vlc = VLC_CODEC_RGB32, .isYUV = false },
+ { .drm = DRM_FORMAT_RGB565, .vlc = VLC_CODEC_RGB16, .isYUV = false },
+#if defined DRM_FORMAT_P010
+ { .drm = DRM_FORMAT_P010, .vlc = VLC_CODEC_P010, .isYUV = true },
+#endif
+ { .drm = DRM_FORMAT_NV12, .vlc = VLC_CODEC_NV12, .isYUV = true },
+ { .drm = DRM_FORMAT_YUYV, .vlc = VLC_CODEC_YUYV, .isYUV = true },
+ { .drm = DRM_FORMAT_YVYU, .vlc = VLC_CODEC_YVYU, .isYUV = true },
+ { .drm = DRM_FORMAT_UYVY, .vlc = VLC_CODEC_UYVY, .isYUV = true },
+ { .drm = DRM_FORMAT_VYUY, .vlc = VLC_CODEC_VYUY, .isYUV = true },
+};
+
+
+static void CheckFourCCList(uint32_t drmfourcc, uint32_t plane_id)
+{
+ unsigned i;
+
+ for (i = 0; i < ARRAY_SIZE(fourccmatching); i++) {
+ if (fourccmatching[i].drm == drmfourcc) {
+ if (fourccmatching[i].present)
+ /* this drmfourcc already has a plane_id found where it
+ * could be used, we'll stay with earlier findings.
+ */
+ break;
+
+ fourccmatching[i].present = true;
+ fourccmatching[i].plane_id = plane_id;
+ break;
+ }
+ }
+}
+
+
+static bool ChromaNegotiation(vout_display_t *vd)
+{
+ vout_display_sys_t *sys = vd->sys;
+ unsigned i, c, propi;
+ uint32_t planetype;
+ const char types[][16] = { "OVERLAY", "PRIMARY", "CURSOR", "UNKNOWN" };
+ drmModePlaneRes *plane_res = NULL;
+ drmModePlane *plane;
+ drmModeObjectProperties *props;
+ drmModePropertyPtr pp;
+ bool YUVFormat;
+
+ /*
+ * For convenience print out in debug prints all supported
+ * DRM modes so they can be seen if use verbose mode.
+ */
+ plane_res = drmModeGetPlaneResources(sys->drm_fd);
+ sys->plane_id = 0;
+
+ if (plane_res != NULL && plane_res->count_planes > 0) {
+ msg_Dbg(vd, "List of DRM supported modes on this machine:");
+ for (c = 0; c < plane_res->count_planes; c++) {
+
+ plane = drmModeGetPlane(sys->drm_fd, plane_res->planes[c]);
+ if (plane != NULL && plane->count_formats > 0) {
+ props = drmModeObjectGetProperties(sys->drm_fd,
+ plane->plane_id,
+ DRM_MODE_OBJECT_PLANE);
+
+ planetype = 3;
+ pp = NULL;
+ for (propi = 0; propi < props->count_props; propi++) {
+ pp = drmModeGetProperty(sys->drm_fd, props->props[propi]);
+ if (strcmp(pp->name, "type") == 0) {
+ break;
+ }
+ drmModeFreeProperty(pp);
+ }
+
+ if (pp != NULL) {
+ drmModeFreeProperty(pp);
+ planetype = props->prop_values[propi];
+ }
+
+ for (i = 0; i < plane->count_formats; i++) {
+ CheckFourCCList(plane->formats[i], plane->plane_id);
+
+ if (sys->forced_drm_fourcc && sys->plane_id == 0 &&
+ plane->formats[i] == sys->drm_fourcc) {
+ sys->plane_id = plane->plane_id;
+ }
+
+ /*
+ * we don't advertise about cursor plane because
+ * of its special limitations.
+ */
+ if (planetype != DRM_PLANE_TYPE_CURSOR) {
+ msg_Dbg(vd, "plane id %d type %s pipe %c format %2d: %.4s",
+ plane->plane_id, types[planetype],
+ ('@'+ffs(plane->possible_crtcs)), i,
+ (char*)&plane->formats[i]);
+ }
+ }
+ drmModeFreePlane(plane);
+ } else {
+ msg_Err(vd, "Couldn't get list of DRM formats");
+ drmModeFreePlaneResources(plane_res);
+ return false;
+ }
+ }
+ drmModeFreePlaneResources(plane_res);
+ }
+
+ if (sys->forced_drm_fourcc) {
+ for (c = i = 0; c < ARRAY_SIZE(fourccmatching); c++) {
+ if (fourccmatching[c].drm == sys->drm_fourcc) {
+ sys->vlc_fourcc = fourccmatching[c].vlc;
+ break;
+ }
+ }
+ if (sys->plane_id == 0) {
+ msg_Err(vd, "Forced DRM fourcc (%.4s) not available in kernel.",
+ (char*)&sys->drm_fourcc);
+ return false;
+ }
+ return true;
+ }
+
+ /*
+ * favor yuv format according to YUVFormat flag.
+ * check for exact match first, then YUVFormat and then !YUVFormat
+ */
+ YUVFormat = vlc_fourcc_IsYUV(sys->vlc_fourcc);
+ for (c = i = 0; c < ARRAY_SIZE(fourccmatching); c++) {
+ if (fourccmatching[c].vlc == sys->vlc_fourcc) {
+ if (!sys->forced_drm_fourcc && fourccmatching[c].present) {
+ sys->drm_fourcc = fourccmatching[c].drm;
+ sys->plane_id = fourccmatching[c].plane_id;
+ }
+
+ if (!sys->drm_fourcc) {
+ msg_Err(vd, "Forced VLC fourcc (%.4s) not matching anything available in kernel, please set manually",
+ (char*)&sys->vlc_fourcc);
+ return false;
+ }
+ return true;
+ }
+ }
+
+ for (c = i = 0; c < ARRAY_SIZE(fourccmatching); c++) {
+ if (fourccmatching[c].isYUV == YUVFormat
+ && fourccmatching[c].present) {
+ if (!sys->forced_drm_fourcc) {
+ sys->drm_fourcc = fourccmatching[c].drm;
+ sys->plane_id = fourccmatching[c].plane_id;
+ }
+
+ sys->vlc_fourcc = fourccmatching[c].vlc;
+ return true;
+ }
+ }
+
+ for (i = 0; c < ARRAY_SIZE(fourccmatching); c++) {
+ if (!fourccmatching[c].isYUV != YUVFormat
+ && fourccmatching[c].present) {
+ if (!sys->forced_drm_fourcc) {
+ sys->drm_fourcc = fourccmatching[c].drm;
+ sys->plane_id = fourccmatching[c].plane_id;
+ }
+
+ sys->vlc_fourcc = fourccmatching[c].vlc;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+static int OpenDisplay(vout_display_t *vd)
+{
+ vout_display_sys_t *sys = vd->sys;
+ char *psz_device;
+ int ret;
+ uint64_t dumbRet;
+ drmModeConnector *conn;
+ drmModeRes *modeRes;
+ int c;
+ bool found_connector = false;
+
+ /*
+ * Open framebuffer device
+ */
+ psz_device = var_InheritString(vd, KMS_VAR);
+ if (psz_device == NULL) {
+ msg_Err(vd, "Don't know which DRM device to open");
+ return VLC_EGENERIC;
+ }
+
+ sys->drm_fd = vlc_open(psz_device, O_RDWR);
+ if (sys->drm_fd == -1) {
+ msg_Err(vd, "cannot open %s", psz_device);
+ free(psz_device);
+ return VLC_EGENERIC;
+ }
+
+ ret = drmSetMaster(sys->drm_fd);
+ if (ret < 0) {
+ msg_Err(vd, "Cannot become DRM master on %s", psz_device);
+
+ free(psz_device);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+ free(psz_device);
+
+ drmSetClientCap(sys->drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+
+ if (!ChromaNegotiation(vd)) {
+ drmDropMaster(sys->drm_fd);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+
+ msg_Dbg(vd, "Using VLC chroma '%.4s', DRM chroma '%.4s'",
+ (char*)&sys->vlc_fourcc, (char*)&sys->drm_fourcc);
+
+ ret = drmGetCap(sys->drm_fd, DRM_CAP_DUMB_BUFFER, &dumbRet);
+ if (ret < 0 || !dumbRet) {
+ msg_Err(vd, "Device '%s' does not support dumb buffers", psz_device);
+ drmDropMaster(sys->drm_fd);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+
+ modeRes = drmModeGetResources(sys->drm_fd);
+ if (modeRes == NULL) {
+ msg_Err(vd, "Didn't get DRM resources");
+ vlc_close(sys->drm_fd);
+ drmDropMaster(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+
+ for (c = 0; c < modeRes->count_connectors && sys->crtc == 0; c++) {
+
+ conn = drmModeGetConnector(sys->drm_fd, modeRes->connectors[c]);
+ if (conn == NULL)
+ continue;
+
+ found_connector = true;
+
+ ret = SetupDevice(vd, modeRes, conn);
+ if (ret != drvSuccess) {
+ if (ret != drvTryNext) {
+ msg_Err(vd, "Cannot do setup for connector %u:%u", c,
+ modeRes->connectors[c]);
+
+ drmModeFreeConnector(conn);
+ drmModeFreeResources(modeRes);
+ drmDropMaster(sys->drm_fd);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+ drmModeFreeConnector(conn);
+ found_connector = false;
+ continue;
+ }
+ drmModeFreeConnector(conn);
+ }
+ drmModeFreeResources(modeRes);
+ if (!found_connector) {
+ drmModeFreeResources(modeRes);
+ drmDropMaster(sys->drm_fd);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
+
+
+static int Control(vout_display_t *vd, int query, va_list args)
+{
+ VLC_UNUSED(vd);
+ VLC_UNUSED(query);
+ VLC_UNUSED(args);
+ return VLC_EGENERIC;
+}
+
+
+static void CustomDestroyPicture(picture_t *p_picture)
+{
+ picture_sys_t *psys = (picture_sys_t*)p_picture->p_sys;
+ vout_display_sys_t *sys = (vout_display_sys_t *)psys->p_voutsys;
+ int c;
+
+ for (c = 0; c < MAXHWBUF; c++)
+ DestroyFB(sys, c);
+
+ drmSetClientCap(sys->drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 0);
+ drmDropMaster(sys->drm_fd);
+ vlc_close(sys->drm_fd);
+ sys->drm_fd = 0;
+ free(p_picture->p_sys);
+ free(p_picture);
+}
+
+
+static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
+{
+ VLC_UNUSED(count);
+ vout_display_sys_t *sys = vd->sys;
+ picture_sys_t *psys;
+ picture_resource_t rsc;
+ int i;
+
+ if (!sys->pool && !sys->picture) {
+ memset(&rsc, 0, sizeof(rsc));
+
+ for (i = 0; i < PICTURE_PLANE_MAX; i++) {
+ rsc.p[i].p_pixels = sys->map[0]+sys->offsets[i];
+ rsc.p[i].i_lines = sys->height;
+ rsc.p[i].i_pitch = sys->stride;
+ }
+
+ psys = calloc(1, sizeof(*psys));
+ if (psys == NULL)
+ return NULL;
+
+ psys->p_voutsys = sys;
+ rsc.p_sys = psys;
+ rsc.pf_destroy = CustomDestroyPicture;
+
+ sys->picture = picture_NewFromResource(&vd->fmt, &rsc);
+
+ if (!sys->picture) {
+ free((void*)psys);
+ return NULL;
+ }
+
+ sys->pool = picture_pool_New(1, &sys->picture);
+ if (!sys->pool)
+ picture_Release(sys->picture);
+ }
+
+ return sys->pool;
+}
+
+
+static void Display(vout_display_t *vd, picture_t *picture,
+ subpicture_t *subpicture)
+{
+ VLC_UNUSED(subpicture);
+ vout_display_sys_t *sys = vd->sys;
+ int i;
+
+ if (drmModeSetPlane(sys->drm_fd, sys->plane_id, sys->crtc,
+ sys->fb[sys->front_buf], 1<<1,
+ 0, 0, sys->width, sys->height,
+ 0, 0, sys->width << 16, sys->height << 16))
+ {
+ msg_Err(vd, "Cannot do set plane for plane id %u, fb %x",
+ sys->plane_id,
+ sys->fb[sys->front_buf]);
+ } else {
+ sys->front_buf++;
+ sys->front_buf %= MAXHWBUF;
+
+ for (i = 0; i < PICTURE_PLANE_MAX; i++)
+ sys->picture->p[i].p_pixels =
+ sys->map[sys->front_buf]+sys->offsets[i];
+ }
+ picture_Release(picture);
+}
+
+
+/**
+ * This function allocates and initializes a KMS vout method.
+ */
+static int Open(vlc_object_t *object)
+{
+ vout_display_t *vd = (vout_display_t *)object;
+ vout_display_sys_t *sys;
+ vlc_fourcc_t local_vlc_chroma;
+ uint32_t local_drm_chroma;
+ video_format_t fmt = {};
+ char *chroma;
+
+ if (vout_display_IsWindowed(vd))
+ return VLC_EGENERIC;
+
+ /*
+ * Allocate instance and initialize some members
+ */
+ vd->sys = sys = calloc(1, sizeof(*sys));
+ if (!sys)
+ return VLC_ENOMEM;
+
+ sys->pool = NULL;
+ sys->drm_fourcc = 0;
+ sys->vlc_fourcc = 0;
+
+ chroma = var_InheritString(vd, "kms-vlc-chroma");
+ if (chroma) {
+ local_vlc_chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, chroma);
+
+ if (local_vlc_chroma) {
+ sys->vlc_fourcc = local_vlc_chroma;
+ msg_Dbg(vd, "Forcing VLC to use chroma '%4s'", chroma);
+ } else {
+ sys->vlc_fourcc = vd->fmt.i_chroma;
+ msg_Dbg(vd, "Chroma %4s invalid, using default", chroma);
+ }
+
+ free(chroma);
+ chroma = NULL;
+ } else {
+ sys->vlc_fourcc = vd->fmt.i_chroma;
+ msg_Dbg(vd, "Chroma %4s invalid, using default", chroma);
+ }
+
+ chroma = var_InheritString(vd, "kms-drm-chroma");
+ if (chroma) {
+ local_drm_chroma = VLC_FOURCC(chroma[0], chroma[1], chroma[2],
+ chroma[3]);
+
+ if (local_drm_chroma) {
+ sys->forced_drm_fourcc = true;
+ sys->drm_fourcc = local_drm_chroma;
+ msg_Dbg(vd, "Setting DRM chroma to '%4s'", chroma);
+ }
+ else
+ msg_Dbg(vd, "Chroma %4s invalid, using default", chroma);
+
+ free(chroma);
+ chroma = NULL;
+ }
+
+ if (OpenDisplay(vd)) {
+ Close(VLC_OBJECT(vd));
+ return VLC_EGENERIC;
+ }
+
+ video_format_ApplyRotation(&fmt, &vd->fmt);
+
+ fmt.i_width = fmt.i_visible_width = sys->width;
+ fmt.i_height = fmt.i_visible_height = sys->height;
+ fmt.i_chroma = sys->vlc_fourcc;
+
+ vd->fmt = fmt;
+ vd->pool = Pool;
+ vd->prepare = NULL;
+ vd->display = Display;
+ vd->control = Control;
+
+ vout_window_ReportSize(vd->cfg->window, sys->width, sys->height);
+ return VLC_SUCCESS;
+}
+
+
+static void CloseDisplay(vout_display_t *vd)
+{
+ vout_display_sys_t *sys = vd->sys;
+
+ if (sys->pool)
+ picture_pool_Release(sys->pool);
+
+ if (sys->drm_fd)
+ drmDropMaster(sys->drm_fd);
+
+ free(sys);
+}
+
+
+/**
+ * Terminate an output method created by Open
+ */
+static void Close(vlc_object_t *object)
+{
+ vout_display_t *vd = (vout_display_t *)object;
+
+ CloseDisplay(vd);
+}
--
2.7.4
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