mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 16:33:02 +00:00
9c5cbbf5d7
They're already pulled in by drm_common.h.
492 lines
13 KiB
C
492 lines
13 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <sys/mman.h>
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#include <poll.h>
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#include <unistd.h>
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#include <libswscale/swscale.h>
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#include "drm_common.h"
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#include "common/msg.h"
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#include "osdep/timer.h"
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#include "sub/osd.h"
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#include "video/fmt-conversion.h"
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#include "video/mp_image.h"
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#include "video/sws_utils.h"
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#include "vo.h"
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#define IMGFMT IMGFMT_BGR0
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#define BYTES_PER_PIXEL 4
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#define BITS_PER_PIXEL 32
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#define USE_MASTER 0
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#define BUF_COUNT 2
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struct framebuffer {
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uint32_t width;
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uint32_t height;
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uint32_t stride;
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uint32_t size;
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uint32_t handle;
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uint8_t *map;
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uint32_t fb;
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};
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struct priv {
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char *connector_spec;
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int mode_id;
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struct kms *kms;
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drmModeCrtc *old_crtc;
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drmEventContext ev;
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bool vt_switcher_active;
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struct vt_switcher vt_switcher;
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struct framebuffer bufs[BUF_COUNT];
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int front_buf;
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bool active;
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bool pflip_happening;
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int32_t screen_w;
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int32_t screen_h;
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struct mp_image *last_input;
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struct mp_image *cur_frame;
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struct mp_rect src;
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struct mp_rect dst;
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struct mp_osd_res osd;
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struct mp_sws_context *sws;
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};
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static void fb_destroy(int fd, struct framebuffer *buf)
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{
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if (buf->map) {
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munmap(buf->map, buf->size);
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}
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if (buf->fb) {
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drmModeRmFB(fd, buf->fb);
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}
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if (buf->handle) {
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struct drm_mode_destroy_dumb dreq = {
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.handle = buf->handle,
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};
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drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
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}
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}
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static bool fb_setup_single(struct vo *vo, int fd, struct framebuffer *buf)
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{
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buf->handle = 0;
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// create dumb buffer
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struct drm_mode_create_dumb creq = {
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.width = buf->width,
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.height = buf->height,
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.bpp = BITS_PER_PIXEL,
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};
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if (drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq) < 0) {
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MP_ERR(vo, "Cannot create dumb buffer: %s\n", mp_strerror(errno));
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goto err;
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}
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buf->stride = creq.pitch;
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buf->size = creq.size;
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buf->handle = creq.handle;
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// create framebuffer object for the dumb-buffer
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if (drmModeAddFB(fd, buf->width, buf->height, 24, creq.bpp, buf->stride,
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buf->handle, &buf->fb)) {
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MP_ERR(vo, "Cannot create framebuffer: %s\n", mp_strerror(errno));
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goto err;
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}
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// prepare buffer for memory mapping
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struct drm_mode_map_dumb mreq = {
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.handle = buf->handle,
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};
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if (drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq)) {
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MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
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goto err;
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}
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// perform actual memory mapping
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buf->map = mmap(0, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
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fd, mreq.offset);
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if (buf->map == MAP_FAILED) {
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MP_ERR(vo, "Cannot map dumb buffer: %s\n", mp_strerror(errno));
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goto err;
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}
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memset(buf->map, 0, buf->size);
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return true;
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err:
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fb_destroy(fd, buf);
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return false;
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}
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static bool fb_setup_double_buffering(struct vo *vo)
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{
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struct priv *p = vo->priv;
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p->front_buf = 0;
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for (unsigned int i = 0; i < 2; i++) {
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p->bufs[i].width = p->kms->mode.hdisplay;
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p->bufs[i].height = p->kms->mode.vdisplay;
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}
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for (unsigned int i = 0; i < BUF_COUNT; i++) {
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if (!fb_setup_single(vo, p->kms->fd, &p->bufs[i])) {
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MP_ERR(vo, "Cannot create framebuffer\n");
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for (unsigned int j = 0; j < i; j++) {
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fb_destroy(p->kms->fd, &p->bufs[j]);
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}
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return false;
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}
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}
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return true;
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}
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static void page_flipped(int fd, unsigned int frame, unsigned int sec,
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unsigned int usec, void *data)
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{
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struct priv *p = data;
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p->pflip_happening = false;
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}
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static bool crtc_setup(struct vo *vo)
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{
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struct priv *p = vo->priv;
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if (p->active)
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return true;
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p->old_crtc = drmModeGetCrtc(p->kms->fd, p->kms->crtc_id);
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int ret = drmModeSetCrtc(p->kms->fd, p->kms->crtc_id,
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p->bufs[p->front_buf + BUF_COUNT - 1].fb,
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0, 0, &p->kms->connector->connector_id, 1,
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&p->kms->mode);
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p->active = true;
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return ret == 0;
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}
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static void crtc_release(struct vo *vo)
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{
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struct priv *p = vo->priv;
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if (!p->active)
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return;
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p->active = false;
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// wait for current page flip
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while (p->pflip_happening) {
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int ret = drmHandleEvent(p->kms->fd, &p->ev);
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if (ret) {
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MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
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break;
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}
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}
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if (p->old_crtc) {
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drmModeSetCrtc(p->kms->fd, p->old_crtc->crtc_id,
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p->old_crtc->buffer_id,
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p->old_crtc->x, p->old_crtc->y,
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&p->kms->connector->connector_id, 1,
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&p->old_crtc->mode);
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drmModeFreeCrtc(p->old_crtc);
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p->old_crtc = NULL;
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}
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}
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static void release_vt(void *data)
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{
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struct vo *vo = data;
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crtc_release(vo);
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if (USE_MASTER) {
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//this function enables support for switching to x, weston etc.
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//however, for whatever reason, it can be called only by root users.
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//until things change, this is commented.
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struct priv *p = vo->priv;
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if (drmDropMaster(p->kms->fd)) {
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MP_WARN(vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
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}
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}
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}
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static void acquire_vt(void *data)
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{
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struct vo *vo = data;
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if (USE_MASTER) {
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struct priv *p = vo->priv;
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if (drmSetMaster(p->kms->fd)) {
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MP_WARN(vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
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}
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}
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crtc_setup(vo);
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}
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static void wait_events(struct vo *vo, int64_t until_time_us)
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{
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struct priv *p = vo->priv;
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if (p->vt_switcher_active) {
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int64_t wait_us = until_time_us - mp_time_us();
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int timeout_ms = MPCLAMP((wait_us + 500) / 1000, 0, 10000);
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vt_switcher_poll(&p->vt_switcher, timeout_ms);
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}
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}
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static void wakeup(struct vo *vo)
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{
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struct priv *p = vo->priv;
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if (p->vt_switcher_active)
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vt_switcher_interrupt_poll(&p->vt_switcher);
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}
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static int reconfig(struct vo *vo, struct mp_image_params *params)
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{
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struct priv *p = vo->priv;
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vo->dwidth = p->screen_w;
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vo->dheight = p->screen_h;
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vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);
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int w = p->dst.x1 - p->dst.x0;
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int h = p->dst.y1 - p->dst.y0;
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// p->osd contains the parameters assuming OSD rendering in window
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// coordinates, but OSD can only be rendered in the intersection
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// between window and video rectangle (i.e. not into panscan borders).
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p->osd.w = w;
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p->osd.h = h;
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p->osd.mt = MPMIN(0, p->osd.mt);
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p->osd.mb = MPMIN(0, p->osd.mb);
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p->osd.mr = MPMIN(0, p->osd.mr);
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p->osd.ml = MPMIN(0, p->osd.ml);
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mp_sws_set_from_cmdline(p->sws, vo->opts->sws_opts);
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p->sws->src = *params;
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p->sws->dst = (struct mp_image_params) {
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.imgfmt = IMGFMT,
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.w = w,
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.h = h,
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.p_w = 1,
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.p_h = 1,
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};
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talloc_free(p->cur_frame);
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p->cur_frame = mp_image_alloc(IMGFMT, p->screen_w, p->screen_h);
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mp_image_params_guess_csp(&p->sws->dst);
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mp_image_set_params(p->cur_frame, &p->sws->dst);
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struct framebuffer *buf = p->bufs;
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for (unsigned int i = 0; i < BUF_COUNT; i++)
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memset(buf[i].map, 0, buf[i].size);
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if (mp_sws_reinit(p->sws) < 0)
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return -1;
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vo->want_redraw = true;
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return 0;
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}
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static void draw_image(struct vo *vo, mp_image_t *mpi)
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{
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struct priv *p = vo->priv;
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if (p->active) {
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if (mpi) {
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struct mp_image src = *mpi;
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struct mp_rect src_rc = p->src;
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src_rc.x0 = MP_ALIGN_DOWN(src_rc.x0, mpi->fmt.align_x);
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src_rc.y0 = MP_ALIGN_DOWN(src_rc.y0, mpi->fmt.align_y);
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mp_image_crop_rc(&src, src_rc);
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mp_sws_scale(p->sws, p->cur_frame, &src);
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osd_draw_on_image(vo->osd, p->osd, src.pts, 0, p->cur_frame);
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} else {
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mp_image_clear(p->cur_frame, 0, 0, p->cur_frame->w, p->cur_frame->h);
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osd_draw_on_image(vo->osd, p->osd, 0, 0, p->cur_frame);
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}
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struct framebuffer *front_buf = &p->bufs[p->front_buf];
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int w = p->dst.x1 - p->dst.x0;
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int h = p->dst.y1 - p->dst.y0;
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int x = (p->screen_w - w) >> 1;
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int y = (p->screen_h - h) >> 1;
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int shift = y * front_buf->stride + x * BYTES_PER_PIXEL;
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memcpy_pic(front_buf->map + shift, p->cur_frame->planes[0],
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w * BYTES_PER_PIXEL, h, front_buf->stride,
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p->cur_frame->stride[0]);
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}
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if (mpi != p->last_input) {
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talloc_free(p->last_input);
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p->last_input = mpi;
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}
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}
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static void flip_page(struct vo *vo)
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{
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struct priv *p = vo->priv;
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if (!p->active || p->pflip_happening)
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return;
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int ret = drmModePageFlip(p->kms->fd, p->kms->crtc_id,
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p->bufs[p->front_buf].fb,
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DRM_MODE_PAGE_FLIP_EVENT, p);
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if (ret) {
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MP_WARN(vo, "Cannot flip page for connector\n");
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} else {
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p->front_buf++;
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p->front_buf %= BUF_COUNT;
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p->pflip_happening = true;
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}
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// poll page flip finish event
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const int timeout_ms = 3000;
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struct pollfd fds[1] = {
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{ .events = POLLIN, .fd = p->kms->fd },
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};
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poll(fds, 1, timeout_ms);
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if (fds[0].revents & POLLIN) {
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ret = drmHandleEvent(p->kms->fd, &p->ev);
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if (ret != 0) {
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MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
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return;
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}
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}
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}
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static void uninit(struct vo *vo)
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{
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struct priv *p = vo->priv;
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crtc_release(vo);
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if (p->kms) {
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for (unsigned int i = 0; i < BUF_COUNT; i++)
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fb_destroy(p->kms->fd, &p->bufs[i]);
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kms_destroy(p->kms);
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p->kms = NULL;
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}
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if (p->vt_switcher_active)
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vt_switcher_destroy(&p->vt_switcher);
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talloc_free(p->last_input);
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talloc_free(p->cur_frame);
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}
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static int preinit(struct vo *vo)
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{
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struct priv *p = vo->priv;
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p->sws = mp_sws_alloc(vo);
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p->ev.version = DRM_EVENT_CONTEXT_VERSION;
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p->ev.page_flip_handler = page_flipped;
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p->vt_switcher_active = vt_switcher_init(&p->vt_switcher, vo->log);
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if (p->vt_switcher_active) {
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vt_switcher_acquire(&p->vt_switcher, acquire_vt, vo);
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vt_switcher_release(&p->vt_switcher, release_vt, vo);
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} else {
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MP_WARN(vo, "Failed to set up VT switcher. Terminal switching will be unavailable.\n");
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}
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p->kms = kms_create(
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vo->log, vo->opts->drm_connector_spec, vo->opts->drm_mode_id);
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if (!p->kms) {
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MP_ERR(vo, "Failed to create KMS.\n");
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goto err;
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}
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if (!fb_setup_double_buffering(vo)) {
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MP_ERR(vo, "Failed to set up double buffering.\n");
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goto err;
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}
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uint64_t has_dumb;
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if (drmGetCap(p->kms->fd, DRM_CAP_DUMB_BUFFER, &has_dumb) < 0) {
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MP_ERR(vo, "Card \"%d\" does not support dumb buffers.\n",
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p->kms->card_no);
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goto err;
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}
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p->screen_w = p->bufs[0].width;
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p->screen_h = p->bufs[0].height;
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if (!crtc_setup(vo)) {
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MP_ERR(vo, "Cannot set CRTC: %s\n", mp_strerror(errno));
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goto err;
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}
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return 0;
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err:
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uninit(vo);
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return -1;
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}
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static int query_format(struct vo *vo, int format)
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{
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return sws_isSupportedInput(imgfmt2pixfmt(format));
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}
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static int control(struct vo *vo, uint32_t request, void *arg)
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{
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struct priv *p = vo->priv;
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switch (request) {
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case VOCTRL_SCREENSHOT_WIN:
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*(struct mp_image**)arg = mp_image_new_copy(p->cur_frame);
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return VO_TRUE;
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case VOCTRL_REDRAW_FRAME:
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draw_image(vo, p->last_input);
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return VO_TRUE;
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case VOCTRL_SET_PANSCAN:
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if (vo->config_ok)
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reconfig(vo, vo->params);
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return VO_TRUE;
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case VOCTRL_GET_DISPLAY_FPS: {
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double fps = kms_get_display_fps(p->kms);
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if (fps <= 0)
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break;
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*(double*)arg = fps;
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return VO_TRUE;
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}
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}
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return VO_NOTIMPL;
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}
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#define OPT_BASE_STRUCT struct priv
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const struct vo_driver video_out_drm = {
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.name = "drm",
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.description = "Direct Rendering Manager",
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.preinit = preinit,
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.query_format = query_format,
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.reconfig = reconfig,
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.control = control,
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.draw_image = draw_image,
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.flip_page = flip_page,
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.uninit = uninit,
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.wait_events = wait_events,
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.wakeup = wakeup,
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.priv_size = sizeof(struct priv),
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};
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