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mpv/video/out/vo_drm.c

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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <sys/mman.h>
#include <poll.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <libswscale/swscale.h>
#include "drm_common.h"
#include "common/msg.h"
#include "osdep/timer.h"
#include "sub/osd.h"
#include "video/fmt-conversion.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"
#include "vo.h"
#define IMGFMT_XRGB8888 IMGFMT_BGR0
#if BYTE_ORDER == BIG_ENDIAN
#define IMGFMT_XRGB2101010 pixfmt2imgfmt(AV_PIX_FMT_GBRP10BE)
#else
#define IMGFMT_XRGB2101010 pixfmt2imgfmt(AV_PIX_FMT_GBRP10LE)
#endif
#define BYTES_PER_PIXEL 4
#define BITS_PER_PIXEL 32
#define USE_MASTER 0
struct framebuffer {
uint32_t width;
uint32_t height;
uint32_t stride;
uint32_t size;
uint32_t handle;
uint8_t *map;
uint32_t fb;
};
struct kms_frame {
struct framebuffer *fb;
struct drm_vsync_tuple vsync;
};
struct priv {
char *connector_spec;
int mode_id;
struct kms *kms;
drmModeCrtc *old_crtc;
drmEventContext ev;
bool vt_switcher_active;
struct vt_switcher vt_switcher;
int swapchain_depth;
unsigned int buf_count;
struct framebuffer *bufs;
int front_buf;
bool active;
bool waiting_for_flip;
bool still;
bool paused;
struct kms_frame **fb_queue;
unsigned int fb_queue_len;
struct framebuffer *cur_fb;
uint32_t drm_format;
enum mp_imgfmt imgfmt;
int32_t screen_w;
int32_t screen_h;
struct mp_image *last_input;
struct mp_image *cur_frame;
struct mp_image *cur_frame_cropped;
struct mp_rect src;
struct mp_rect dst;
struct mp_osd_res osd;
struct mp_sws_context *sws;
struct drm_vsync_tuple vsync;
struct vo_vsync_info vsync_info;
};
static void fb_destroy(int fd, struct framebuffer *buf)
{
if (buf->map) {
munmap(buf->map, buf->size);
}
if (buf->fb) {
drmModeRmFB(fd, buf->fb);
}
if (buf->handle) {
struct drm_mode_destroy_dumb dreq = {
.handle = buf->handle,
};
drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
}
}
static bool fb_setup_single(struct vo *vo, int fd, struct framebuffer *buf)
{
struct priv *p = vo->priv;
buf->handle = 0;
// create dumb buffer
struct drm_mode_create_dumb creq = {
.width = buf->width,
.height = buf->height,
.bpp = BITS_PER_PIXEL,
};
if (drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq) < 0) {
MP_ERR(vo, "Cannot create dumb buffer: %s\n", mp_strerror(errno));
goto err;
}
buf->stride = creq.pitch;
buf->size = creq.size;
buf->handle = creq.handle;
// create framebuffer object for the dumb-buffer
int ret = drmModeAddFB2(fd, buf->width, buf->height,
p->drm_format,
(uint32_t[4]){buf->handle, 0, 0, 0},
(uint32_t[4]){buf->stride, 0, 0, 0},
(uint32_t[4]){0, 0, 0, 0},
&buf->fb, 0);
if (ret) {
MP_ERR(vo, "Cannot create framebuffer: %s\n", mp_strerror(errno));
goto err;
}
// prepare buffer for memory mapping
struct drm_mode_map_dumb mreq = {
.handle = buf->handle,
};
if (drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq)) {
MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
goto err;
}
// perform actual memory mapping
buf->map = mmap(0, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, mreq.offset);
if (buf->map == MAP_FAILED) {
MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
goto err;
}
memset(buf->map, 0, buf->size);
return true;
err:
fb_destroy(fd, buf);
return false;
}
static bool fb_setup_buffers(struct vo *vo)
{
struct priv *p = vo->priv;
p->bufs = talloc_zero_array(p, struct framebuffer, p->buf_count);
p->front_buf = 0;
for (unsigned int i = 0; i < p->buf_count; i++) {
p->bufs[i].width = p->kms->mode.mode.hdisplay;
p->bufs[i].height = p->kms->mode.mode.vdisplay;
}
for (unsigned int i = 0; i < p->buf_count; i++) {
if (!fb_setup_single(vo, p->kms->fd, &p->bufs[i])) {
MP_ERR(vo, "Cannot create framebuffer\n");
for (unsigned int j = 0; j < i; j++) {
fb_destroy(p->kms->fd, &p->bufs[j]);
}
return false;
}
}
p->cur_fb = &p->bufs[0];
return true;
}
static void get_vsync(struct vo *vo, struct vo_vsync_info *info)
{
struct priv *p = vo->priv;
*info = p->vsync_info;
}
static bool crtc_setup(struct vo *vo)
{
struct priv *p = vo->priv;
if (p->active)
return true;
p->old_crtc = drmModeGetCrtc(p->kms->fd, p->kms->crtc_id);
int ret = drmModeSetCrtc(p->kms->fd, p->kms->crtc_id,
p->cur_fb->fb,
0, 0, &p->kms->connector->connector_id, 1,
&p->kms->mode.mode);
p->active = true;
return ret == 0;
}
static void crtc_release(struct vo *vo)
{
struct priv *p = vo->priv;
if (!p->active)
return;
p->active = false;
// wait for current page flip
while (p->waiting_for_flip) {
int ret = drmHandleEvent(p->kms->fd, &p->ev);
if (ret) {
MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
break;
}
}
if (p->old_crtc) {
drmModeSetCrtc(p->kms->fd, p->old_crtc->crtc_id,
p->old_crtc->buffer_id,
p->old_crtc->x, p->old_crtc->y,
&p->kms->connector->connector_id, 1,
&p->old_crtc->mode);
drmModeFreeCrtc(p->old_crtc);
p->old_crtc = NULL;
}
}
static void release_vt(void *data)
{
struct vo *vo = data;
crtc_release(vo);
if (USE_MASTER) {
//this function enables support for switching to x, weston etc.
//however, for whatever reason, it can be called only by root users.
//until things change, this is commented.
struct priv *p = vo->priv;
if (drmDropMaster(p->kms->fd)) {
MP_WARN(vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
}
}
}
static void acquire_vt(void *data)
{
struct vo *vo = data;
if (USE_MASTER) {
struct priv *p = vo->priv;
if (drmSetMaster(p->kms->fd)) {
MP_WARN(vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
}
}
crtc_setup(vo);
}
static void wait_events(struct vo *vo, int64_t until_time_us)
{
struct priv *p = vo->priv;
if (p->vt_switcher_active) {
int64_t wait_us = until_time_us - mp_time_us();
int timeout_ms = MPCLAMP((wait_us + 500) / 1000, 0, 10000);
vt_switcher_poll(&p->vt_switcher, timeout_ms);
} else {
vo_wait_default(vo, until_time_us);
}
}
static void wakeup(struct vo *vo)
{
struct priv *p = vo->priv;
if (p->vt_switcher_active)
vt_switcher_interrupt_poll(&p->vt_switcher);
}
static int reconfig(struct vo *vo, struct mp_image_params *params)
{
struct priv *p = vo->priv;
vo->dwidth = p->screen_w;
vo->dheight = p->screen_h;
vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);
int w = p->dst.x1 - p->dst.x0;
int h = p->dst.y1 - p->dst.y0;
p->sws->src = *params;
p->sws->dst = (struct mp_image_params) {
.imgfmt = p->imgfmt,
.w = w,
.h = h,
.p_w = 1,
.p_h = 1,
};
talloc_free(p->cur_frame);
p->cur_frame = mp_image_alloc(p->imgfmt, p->screen_w, p->screen_h);
mp_image_params_guess_csp(&p->sws->dst);
mp_image_set_params(p->cur_frame, &p->sws->dst);
p->cur_frame[0].w = p->screen_w;
p->cur_frame[0].h = p->screen_h;
talloc_free(p->cur_frame_cropped);
p->cur_frame_cropped = mp_image_new_dummy_ref(p->cur_frame);
mp_image_crop_rc(p->cur_frame_cropped, p->dst);
talloc_free(p->last_input);
p->last_input = NULL;
if (mp_sws_reinit(p->sws) < 0)
return -1;
p->vsync_info.vsync_duration = 0;
p->vsync_info.skipped_vsyncs = -1;
p->vsync_info.last_queue_display_time = -1;
vo->want_redraw = true;
return 0;
}
static void wait_on_flip(struct vo *vo)
{
struct priv *p = vo->priv;
// poll page flip finish event
while (p->waiting_for_flip) {
const int timeout_ms = 3000;
struct pollfd fds[1] = { { .events = POLLIN, .fd = p->kms->fd } };
poll(fds, 1, timeout_ms);
if (fds[0].revents & POLLIN) {
const int ret = drmHandleEvent(p->kms->fd, &p->ev);
if (ret != 0) {
MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
return;
}
}
}
}
static struct framebuffer *get_new_fb(struct vo *vo)
{
struct priv *p = vo->priv;
p->front_buf++;
p->front_buf %= p->buf_count;
return &p->bufs[p->front_buf];
}
static void draw_image(struct vo *vo, mp_image_t *mpi, struct framebuffer *front_buf)
{
struct priv *p = vo->priv;
if (p->active && front_buf != NULL) {
if (mpi) {
struct mp_image src = *mpi;
struct mp_rect src_rc = p->src;
src_rc.x0 = MP_ALIGN_DOWN(src_rc.x0, mpi->fmt.align_x);
src_rc.y0 = MP_ALIGN_DOWN(src_rc.y0, mpi->fmt.align_y);
mp_image_crop_rc(&src, src_rc);
mp_image_clear(p->cur_frame, 0, 0, p->cur_frame->w, p->dst.y0);
mp_image_clear(p->cur_frame, 0, p->dst.y1, p->cur_frame->w, p->cur_frame->h);
mp_image_clear(p->cur_frame, 0, p->dst.y0, p->dst.x0, p->dst.y1);
mp_image_clear(p->cur_frame, p->dst.x1, p->dst.y0, p->cur_frame->w, p->dst.y1);
mp_sws_scale(p->sws, p->cur_frame_cropped, &src);
osd_draw_on_image(vo->osd, p->osd, src.pts, 0, p->cur_frame);
} else {
mp_image_clear(p->cur_frame, 0, 0, p->cur_frame->w, p->cur_frame->h);
osd_draw_on_image(vo->osd, p->osd, 0, 0, p->cur_frame);
}
if (p->drm_format == DRM_FORMAT_XRGB2101010) {
// Pack GBRP10 image into XRGB2101010 for DRM
const int w = p->cur_frame->w;
const int h = p->cur_frame->h;
const int g_padding = p->cur_frame->stride[0]/sizeof(uint16_t) - w;
const int b_padding = p->cur_frame->stride[1]/sizeof(uint16_t) - w;
const int r_padding = p->cur_frame->stride[2]/sizeof(uint16_t) - w;
const int fbuf_padding = front_buf->stride/sizeof(uint32_t) - w;
uint16_t *g_ptr = (uint16_t*)p->cur_frame->planes[0];
uint16_t *b_ptr = (uint16_t*)p->cur_frame->planes[1];
uint16_t *r_ptr = (uint16_t*)p->cur_frame->planes[2];
uint32_t *fbuf_ptr = (uint32_t*)front_buf->map;
for (unsigned y = 0; y < h; ++y) {
for (unsigned x = 0; x < w; ++x) {
*fbuf_ptr++ = (*r_ptr++ << 20) | (*g_ptr++ << 10) | (*b_ptr++);
}
g_ptr += g_padding;
b_ptr += b_padding;
r_ptr += r_padding;
fbuf_ptr += fbuf_padding;
}
} else { // p->drm_format == DRM_FORMAT_XRGB8888
memcpy_pic(front_buf->map, p->cur_frame->planes[0],
p->cur_frame->w * BYTES_PER_PIXEL, p->cur_frame->h,
front_buf->stride,
p->cur_frame->stride[0]);
}
}
if (mpi != p->last_input) {
talloc_free(p->last_input);
p->last_input = mpi;
}
}
static void enqueue_frame(struct vo *vo, struct framebuffer *fb)
{
struct priv *p = vo->priv;
p->vsync.sbc++;
struct kms_frame *new_frame = talloc(p, struct kms_frame);
new_frame->fb = fb;
new_frame->vsync = p->vsync;
MP_TARRAY_APPEND(p, p->fb_queue, p->fb_queue_len, new_frame);
}
static void dequeue_frame(struct vo *vo)
{
struct priv *p = vo->priv;
talloc_free(p->fb_queue[0]);
MP_TARRAY_REMOVE_AT(p->fb_queue, p->fb_queue_len, 0);
}
static void swapchain_step(struct vo *vo)
{
struct priv *p = vo->priv;
if (p->fb_queue_len > 0) {
dequeue_frame(vo);
}
}
static void draw_frame(struct vo *vo, struct vo_frame *frame)
{
struct priv *p = vo->priv;
if (!p->active)
return;
p->still = frame->still;
// we redraw the entire image when OSD needs to be redrawn
const bool repeat = frame->repeat && !frame->redraw;
struct framebuffer *fb = &p->bufs[p->front_buf];
if (!repeat) {
fb = get_new_fb(vo);
draw_image(vo, mp_image_new_ref(frame->current), fb);
}
enqueue_frame(vo, fb);
}
static void queue_flip(struct vo *vo, struct kms_frame *frame)
{
int ret = 0;
struct priv *p = vo->priv;
p->cur_fb = frame->fb;
// Alloc and fill the data struct for the page flip callback
struct drm_pflip_cb_closure *data = talloc(p, struct drm_pflip_cb_closure);
data->frame_vsync = &frame->vsync;
data->vsync = &p->vsync;
data->vsync_info = &p->vsync_info;
data->waiting_for_flip = &p->waiting_for_flip;
data->log = vo->log;
ret = drmModePageFlip(p->kms->fd, p->kms->crtc_id,
p->cur_fb->fb,
DRM_MODE_PAGE_FLIP_EVENT, data);
if (ret) {
MP_WARN(vo, "Failed to queue page flip: %s\n", mp_strerror(errno));
} else {
p->waiting_for_flip = true;
}
}
static void flip_page(struct vo *vo)
{
struct priv *p = vo->priv;
const bool drain = p->paused || p->still;
if (!p->active)
return;
while (drain || p->fb_queue_len > p->swapchain_depth) {
if (p->waiting_for_flip) {
wait_on_flip(vo);
swapchain_step(vo);
}
if (p->fb_queue_len <= 1)
break;
if (!p->fb_queue[1] || !p->fb_queue[1]->fb) {
MP_ERR(vo, "Hole in swapchain?\n");
swapchain_step(vo);
continue;
}
queue_flip(vo, p->fb_queue[1]);
}
}
static void uninit(struct vo *vo)
{
struct priv *p = vo->priv;
crtc_release(vo);
while (p->fb_queue_len > 0) {
swapchain_step(vo);
}
if (p->kms) {
for (unsigned int i = 0; i < p->buf_count; i++)
fb_destroy(p->kms->fd, &p->bufs[i]);
kms_destroy(p->kms);
p->kms = NULL;
}
if (p->vt_switcher_active)
vt_switcher_destroy(&p->vt_switcher);
talloc_free(p->last_input);
talloc_free(p->cur_frame);
talloc_free(p->cur_frame_cropped);
}
static int preinit(struct vo *vo)
{
struct priv *p = vo->priv;
p->sws = mp_sws_alloc(vo);
p->sws->log = vo->log;
mp_sws_enable_cmdline_opts(p->sws, vo->global);
p->ev.version = DRM_EVENT_CONTEXT_VERSION;
p->ev.page_flip_handler = &drm_pflip_cb;
p->vt_switcher_active = vt_switcher_init(&p->vt_switcher, vo->log);
if (p->vt_switcher_active) {
vt_switcher_acquire(&p->vt_switcher, acquire_vt, vo);
vt_switcher_release(&p->vt_switcher, release_vt, vo);
} else {
MP_WARN(vo, "Failed to set up VT switcher. Terminal switching will be unavailable.\n");
}
p->kms = kms_create(vo->log,
vo->opts->drm_opts->drm_connector_spec,
vo->opts->drm_opts->drm_mode_spec,
0, 0, false);
if (!p->kms) {
MP_ERR(vo, "Failed to create KMS.\n");
goto err;
}
if (vo->opts->drm_opts->drm_format == DRM_OPTS_FORMAT_XRGB2101010) {
p->drm_format = DRM_FORMAT_XRGB2101010;
p->imgfmt = IMGFMT_XRGB2101010;
} else {
p->drm_format = DRM_FORMAT_XRGB8888;;
p->imgfmt = IMGFMT_XRGB8888;
}
p->swapchain_depth = vo->opts->swapchain_depth;
p->buf_count = p->swapchain_depth + 1;
if (!fb_setup_buffers(vo)) {
MP_ERR(vo, "Failed to set up buffers.\n");
goto err;
}
uint64_t has_dumb = 0;
if (drmGetCap(p->kms->fd, DRM_CAP_DUMB_BUFFER, &has_dumb) < 0
|| has_dumb == 0) {
MP_ERR(vo, "Card \"%d\" does not support dumb buffers.\n",
p->kms->card_no);
goto err;
}
p->screen_w = p->bufs[0].width;
p->screen_h = p->bufs[0].height;
if (!crtc_setup(vo)) {
MP_ERR(vo, "Cannot set CRTC: %s\n", mp_strerror(errno));
goto err;
}
if (vo->opts->force_monitor_aspect != 0.0) {
vo->monitor_par = p->screen_w / (double) p->screen_h /
vo->opts->force_monitor_aspect;
} else {
vo->monitor_par = 1 / vo->opts->monitor_pixel_aspect;
}
mp_verbose(vo->log, "Monitor pixel aspect: %g\n", vo->monitor_par);
p->vsync_info.vsync_duration = 0;
p->vsync_info.skipped_vsyncs = -1;
p->vsync_info.last_queue_display_time = -1;
return 0;
err:
uninit(vo);
return -1;
}
static int query_format(struct vo *vo, int format)
{
return sws_isSupportedInput(imgfmt2pixfmt(format));
}
static int control(struct vo *vo, uint32_t request, void *arg)
{
struct priv *p = vo->priv;
switch (request) {
case VOCTRL_SCREENSHOT_WIN:
*(struct mp_image**)arg = mp_image_new_copy(p->cur_frame);
return VO_TRUE;
case VOCTRL_SET_PANSCAN:
if (vo->config_ok)
reconfig(vo, vo->params);
return VO_TRUE;
case VOCTRL_GET_DISPLAY_FPS: {
double fps = kms_get_display_fps(p->kms);
if (fps <= 0)
break;
*(double*)arg = fps;
return VO_TRUE;
}
case VOCTRL_PAUSE:
vo->want_redraw = true;
p->paused = true;
return VO_TRUE;
case VOCTRL_RESUME:
p->paused = false;
p->vsync_info.last_queue_display_time = -1;
p->vsync_info.skipped_vsyncs = 0;
p->vsync.ust = 0;
p->vsync.msc = 0;
return VO_TRUE;
}
return VO_NOTIMPL;
}
#define OPT_BASE_STRUCT struct priv
const struct vo_driver video_out_drm = {
.name = "drm",
.description = "Direct Rendering Manager (software scaling)",
.preinit = preinit,
.query_format = query_format,
.reconfig = reconfig,
.control = control,
.draw_frame = draw_frame,
.flip_page = flip_page,
.get_vsync = get_vsync,
.uninit = uninit,
.wait_events = wait_events,
.wakeup = wakeup,
.priv_size = sizeof(struct priv),
};
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