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mpv/player/discnav.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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <limits.h>
#include <pthread.h>
#include <assert.h>
#include "core.h"
#include "command.h"
#include "common/msg.h"
#include "common/common.h"
#include "input/input.h"
#include "demux/demux.h"
#include "stream/discnav.h"
#include "sub/dec_sub.h"
#include "sub/osd.h"
#include "video/mp_image.h"
#include "video/decode/dec_video.h"
struct mp_nav_state {
struct mp_log *log;
int nav_still_frame;
bool nav_eof;
bool nav_menu;
bool nav_draining;
// Accessed by OSD (possibly separate thread)
// Protected by the given lock
pthread_mutex_t osd_lock;
int hi_visible;
int highlight[4]; // x0 y0 x1 y1
int vidsize[2];
int subsize[2];
struct sub_bitmap *hi_elem;
struct sub_bitmap *overlays[2];
struct sub_bitmap outputs[3];
};
static inline bool is_valid_size(int size[2])
{
return size[0] >= 1 && size[1] >= 1;
}
static void update_resolution(struct MPContext *mpctx)
{
struct mp_nav_state *nav = mpctx->nav_state;
int size[2] = {0};
if (mpctx->d_sub[0])
sub_control(mpctx->d_sub[0], SD_CTRL_GET_RESOLUTION, size);
if (!is_valid_size(size)) {
struct mp_image_params vid = {0};
if (mpctx->d_video)
vid = mpctx->d_video->decoder_output;
size[0] = vid.w;
size[1] = vid.h;
}
pthread_mutex_lock(&nav->osd_lock);
nav->vidsize[0] = size[0];
nav->vidsize[1] = size[1];
pthread_mutex_unlock(&nav->osd_lock);
}
// Send update events and such.
static void update_state(struct MPContext *mpctx)
{
mp_notify_property(mpctx, "disc-menu-active");
}
// Return 1 if in menu, 0 if in video, or <0 if no navigation possible.
int mp_nav_in_menu(struct MPContext *mpctx)
{
return mpctx->nav_state ? mpctx->nav_state->nav_menu : -1;
}
// If a demuxer is accessing the stream, we have to use demux_stream_control()
// to avoid synchronization issues; otherwise access it directly.
static int run_stream_control(struct MPContext *mpctx, int cmd, void *arg)
{
if (mpctx->demuxer) {
return demux_stream_control(mpctx->demuxer, cmd, arg);
} else if (mpctx->stream) {
return stream_control(mpctx->stream, cmd, arg);
}
return STREAM_ERROR;
}
// Allocate state and enable navigation features. Must happen before
// initializing cache, because the cache would read data. Since stream_dvdnav is
// in a mode which skips all transitions on reading data (before enabling
// navigation), this would skip some menu screens.
void mp_nav_init(struct MPContext *mpctx)
{
assert(!mpctx->nav_state);
// dvdnav is interactive
if (mpctx->encode_lavc_ctx)
return;
struct mp_nav_cmd inp = {MP_NAV_CMD_ENABLE};
if (run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp) < 1)
return;
mpctx->nav_state = talloc_zero(NULL, struct mp_nav_state);
mpctx->nav_state->log = mp_log_new(mpctx->nav_state, mpctx->log, "discnav");
pthread_mutex_init(&mpctx->nav_state->osd_lock, NULL);
MP_VERBOSE(mpctx->nav_state, "enabling\n");
mp_input_enable_section(mpctx->input, "discnav", 0);
mp_input_set_section_mouse_area(mpctx->input, "discnav-menu",
INT_MIN, INT_MIN, INT_MAX, INT_MAX);
update_state(mpctx);
}
void mp_nav_reset(struct MPContext *mpctx)
{
struct mp_nav_state *nav = mpctx->nav_state;
if (!nav)
return;
struct mp_nav_cmd inp = {MP_NAV_CMD_RESUME};
run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp);
osd_set_nav_highlight(mpctx->osd, NULL);
nav->hi_visible = 0;
nav->nav_menu = false;
nav->nav_draining = false;
nav->nav_still_frame = 0;
mp_input_disable_section(mpctx->input, "discnav-menu");
run_stream_control(mpctx, STREAM_CTRL_RESUME_CACHE, NULL);
update_state(mpctx);
}
void mp_nav_destroy(struct MPContext *mpctx)
{
osd_set_nav_highlight(mpctx->osd, NULL);
if (!mpctx->nav_state)
return;
mp_input_disable_section(mpctx->input, "discnav");
mp_input_disable_section(mpctx->input, "discnav-menu");
pthread_mutex_destroy(&mpctx->nav_state->osd_lock);
talloc_free(mpctx->nav_state);
mpctx->nav_state = NULL;
update_state(mpctx);
}
void mp_nav_user_input(struct MPContext *mpctx, char *command)
{
struct mp_nav_state *nav = mpctx->nav_state;
if (!nav)
return;
// In the short time while the demuxer is opened (running in a different
// thread) we can't access the stream directly. Once the demuxer is opened,
// we can access the stream via demux_stream_control() though.
if (!mpctx->demuxer)
return;
if (strcmp(command, "mouse_move") == 0) {
struct mp_image_params vid = {0};
if (mpctx->d_video)
vid = mpctx->d_video->decoder_output;
struct mp_nav_cmd inp = {MP_NAV_CMD_MOUSE_POS};
int x, y;
mp_input_get_mouse_pos(mpctx->input, &x, &y);
osd_coords_to_video(mpctx->osd, vid.w, vid.h, &x, &y);
inp.u.mouse_pos.x = x;
inp.u.mouse_pos.y = y;
run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp);
} else {
struct mp_nav_cmd inp = {MP_NAV_CMD_MENU};
inp.u.menu.action = command;
run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp);
}
}
void mp_handle_nav(struct MPContext *mpctx)
{
struct mp_nav_state *nav = mpctx->nav_state;
if (!nav)
return;
while (1) {
struct mp_nav_event *ev = NULL;
run_stream_control(mpctx, STREAM_CTRL_GET_NAV_EVENT, &ev);
if (!ev)
break;
switch (ev->event) {
case MP_NAV_EVENT_DRAIN: {
nav->nav_draining = true;
MP_VERBOSE(nav, "drain requested\n");
break;
}
case MP_NAV_EVENT_RESET_ALL: {
mpctx->stop_play = PT_RELOAD_DEMUXER;
MP_VERBOSE(nav, "reload\n");
// return immediately.
// other events should be handled after reloaded.
talloc_free(ev);
return;
}
case MP_NAV_EVENT_RESET: {
nav->nav_still_frame = 0;
break;
}
case MP_NAV_EVENT_EOF:
nav->nav_eof = true;
break;
case MP_NAV_EVENT_STILL_FRAME: {
int len = ev->u.still_frame.seconds;
MP_VERBOSE(nav, "wait for %d seconds\n", len);
if (len > 0 && nav->nav_still_frame == 0)
nav->nav_still_frame = len;
break;
}
case MP_NAV_EVENT_MENU_MODE:
nav->nav_menu = ev->u.menu_mode.enable;
if (nav->nav_menu) {
mp_input_enable_section(mpctx->input, "discnav-menu",
MP_INPUT_ON_TOP);
} else {
mp_input_disable_section(mpctx->input, "discnav-menu");
}
update_state(mpctx);
break;
case MP_NAV_EVENT_HIGHLIGHT: {
pthread_mutex_lock(&nav->osd_lock);
MP_VERBOSE(nav, "highlight: %d %d %d - %d %d\n",
ev->u.highlight.display,
ev->u.highlight.sx, ev->u.highlight.sy,
ev->u.highlight.ex, ev->u.highlight.ey);
nav->highlight[0] = ev->u.highlight.sx;
nav->highlight[1] = ev->u.highlight.sy;
nav->highlight[2] = ev->u.highlight.ex;
nav->highlight[3] = ev->u.highlight.ey;
nav->hi_visible = ev->u.highlight.display;
pthread_mutex_unlock(&nav->osd_lock);
update_resolution(mpctx);
osd_set_nav_highlight(mpctx->osd, mpctx);
break;
}
case MP_NAV_EVENT_OVERLAY: {
pthread_mutex_lock(&nav->osd_lock);
for (int i = 0; i < 2; i++) {
if (nav->overlays[i])
talloc_free(nav->overlays[i]);
nav->overlays[i] = talloc_steal(nav, ev->u.overlay.images[i]);
}
pthread_mutex_unlock(&nav->osd_lock);
update_resolution(mpctx);
osd_set_nav_highlight(mpctx->osd, mpctx);
break;
}
default: ; // ignore
}
talloc_free(ev);
}
update_resolution(mpctx);
if (mpctx->stop_play == AT_END_OF_FILE) {
if (nav->nav_still_frame > 0) {
// gross hack
mpctx->time_frame += nav->nav_still_frame;
nav->nav_still_frame = -2;
} else if (nav->nav_still_frame == -2) {
struct mp_nav_cmd inp = {MP_NAV_CMD_SKIP_STILL};
run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp);
}
}
if (nav->nav_draining && mpctx->stop_play == AT_END_OF_FILE) {
MP_VERBOSE(nav, "execute drain\n");
struct mp_nav_cmd inp = {MP_NAV_CMD_DRAIN_OK};
run_stream_control(mpctx, STREAM_CTRL_NAV_CMD, &inp);
nav->nav_draining = false;
run_stream_control(mpctx, STREAM_CTRL_RESUME_CACHE, NULL);
}
// E.g. keep displaying still frames
if (mpctx->stop_play == AT_END_OF_FILE && !nav->nav_eof)
mpctx->stop_play = KEEP_PLAYING;
}
// Render "fake" highlights, because using actual dvd sub highlight elements
// is too hard, and would require changes to libavcodec's dvdsub decoder.
// Note: a proper solution would introduce something like
// SD_CTRL_APPLY_DVDNAV, which would crop the vobsub frame,
// and apply the current CLUT.
void mp_nav_get_highlight(void *priv, struct mp_osd_res res,
struct sub_bitmaps *out_imgs)
{
struct MPContext *mpctx = priv;
struct mp_nav_state *nav = mpctx->nav_state;
pthread_mutex_lock(&nav->osd_lock);
struct sub_bitmap *sub = nav->hi_elem;
if (!sub)
sub = talloc_zero(nav, struct sub_bitmap);
nav->hi_elem = sub;
if (!is_valid_size(nav->vidsize)) {
pthread_mutex_unlock(&nav->osd_lock);
return;
}
int sizes[2] = {nav->vidsize[0], nav->vidsize[1]};
if (sizes[0] != nav->subsize[0] || sizes[1] != nav->subsize[1]) {
talloc_free(sub->bitmap);
sub->bitmap = talloc_array(sub, uint32_t, sizes[0] * sizes[1]);
memset(sub->bitmap, 0x80, talloc_get_size(sub->bitmap));
nav->subsize[0] = sizes[0];
nav->subsize[1] = sizes[1];
}
out_imgs->num_parts = 0;
if (nav->hi_visible) {
sub->x = nav->highlight[0];
sub->y = nav->highlight[1];
sub->w = MPCLAMP(nav->highlight[2] - sub->x, 0, sizes[0]);
sub->h = MPCLAMP(nav->highlight[3] - sub->y, 0, sizes[1]);
sub->stride = sub->w * 4;
if (sub->w > 0 && sub->h > 0)
nav->outputs[out_imgs->num_parts++] = *sub;
}
if (nav->overlays[0])
nav->outputs[out_imgs->num_parts++] = *nav->overlays[0];
if (nav->overlays[1])
nav->outputs[out_imgs->num_parts++] = *nav->overlays[1];
if (out_imgs->num_parts) {
out_imgs->parts = nav->outputs;
out_imgs->format = SUBBITMAP_RGBA;
osd_rescale_bitmaps(out_imgs, sizes[0], sizes[1], res, 0);
}
pthread_mutex_unlock(&nav->osd_lock);
}
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