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mpv/video/out/vo.c
wm4 37319ab644 video: change --video-zoom behavior 
Use the scaled video size (i.e. as shown on the window) as reference for
zoom. This is the easiest way to fix different width/height scale
factors  as they happen when zooming video with a pixel aspect ratio
other than 1:1.

Also fix the unscaled mode, so that it 1. doesn't scale even with
--video-zoom, and 2. doesn't scale by small amounts when the video is
cropped by making the window smaller than the video.
2013-12-13 22:25:38 +01:00

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/*
* libvo common functions, variables used by many/all drivers.
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stdbool.h>
#include <unistd.h>
#include <libavutil/common.h>
#include "talloc.h"
#include "config.h"
#include "osdep/timer.h"
#include "mpvcore/options.h"
#include "mpvcore/bstr.h"
#include "vo.h"
#include "aspect.h"
#include "mpvcore/input/input.h"
#include "mpvcore/m_config.h"
#include "mpvcore/mp_msg.h"
#include "mpvcore/mpv_global.h"
#include "video/mp_image.h"
#include "video/vfcap.h"
#include "sub/osd.h"
//
// Externally visible list of all vo drivers
//
extern struct vo_driver video_out_x11;
extern struct vo_driver video_out_vdpau;
extern struct vo_driver video_out_xv;
extern struct vo_driver video_out_opengl;
extern struct vo_driver video_out_opengl_hq;
extern struct vo_driver video_out_opengl_old;
extern struct vo_driver video_out_null;
extern struct vo_driver video_out_image;
extern struct vo_driver video_out_lavc;
extern struct vo_driver video_out_caca;
extern struct vo_driver video_out_direct3d;
extern struct vo_driver video_out_direct3d_shaders;
extern struct vo_driver video_out_sdl;
extern struct vo_driver video_out_corevideo;
extern struct vo_driver video_out_vaapi;
extern struct vo_driver video_out_wayland;
const struct vo_driver *video_out_drivers[] =
{
#if HAVE_VDPAU
&video_out_vdpau,
#endif
#if HAVE_GL
&video_out_opengl,
#endif
#if HAVE_DIRECT3D
&video_out_direct3d_shaders,
&video_out_direct3d,
#endif
#if HAVE_COREVIDEO
&video_out_corevideo,
#endif
#if HAVE_XV
&video_out_xv,
#endif
#if HAVE_SDL2
&video_out_sdl,
#endif
#if HAVE_GL
&video_out_opengl_old,
#endif
#if HAVE_VAAPI
&video_out_vaapi,
#endif
#if HAVE_X11
&video_out_x11,
#endif
&video_out_null,
// should not be auto-selected
&video_out_image,
#if HAVE_CACA
&video_out_caca,
#endif
#if HAVE_ENCODING
&video_out_lavc,
#endif
#if HAVE_GL
&video_out_opengl_hq,
#endif
#if HAVE_WAYLAND
&video_out_wayland,
#endif
NULL
};
static bool get_desc(struct m_obj_desc *dst, int index)
{
if (index >= MP_ARRAY_SIZE(video_out_drivers) - 1)
return false;
const struct vo_driver *vo = video_out_drivers[index];
*dst = (struct m_obj_desc) {
.name = vo->name,
.description = vo->description,
.priv_size = vo->priv_size,
.priv_defaults = vo->priv_defaults,
.options = vo->options,
.hidden = vo->encode,
.p = vo,
};
return true;
}
// For the vo option
const struct m_obj_list vo_obj_list = {
.get_desc = get_desc,
.description = "video outputs",
.aliases = {
{"gl", "opengl"},
{"gl3", "opengl-hq"},
{0}
},
.allow_unknown_entries = true,
.allow_trailer = true,
};
static struct vo *vo_create(struct mpv_global *global,
struct input_ctx *input_ctx,
struct encode_lavc_context *encode_lavc_ctx,
char *name, char **args)
{
struct mp_log *log = mp_log_new(NULL, global->log, "vo");
struct m_obj_desc desc;
if (!m_obj_list_find(&desc, &vo_obj_list, bstr0(name))) {
mp_msg_log(log, MSGL_ERR, "Video output %s not found!\n", name);
talloc_free(log);
return NULL;
};
struct vo *vo = talloc_ptrtype(NULL, vo);
*vo = (struct vo) {
.vo_log = { .log = talloc_steal(vo, log) },
.log = mp_log_new(vo, log, name),
.driver = desc.p,
.opts = &global->opts->vo,
.encode_lavc_ctx = encode_lavc_ctx,
.input_ctx = input_ctx,
.event_fd = -1,
.registered_fd = -1,
.aspdat = { .monitor_par = 1 },
.next_pts = MP_NOPTS_VALUE,
.next_pts2 = MP_NOPTS_VALUE,
};
if (vo->driver->encode != !!vo->encode_lavc_ctx)
goto error;
struct m_config *config = m_config_from_obj_desc(vo, &desc);
if (m_config_apply_defaults(config, name, vo->opts->vo_defs) < 0)
goto error;
if (m_config_set_obj_params(config, args) < 0)
goto error;
vo->priv = config->optstruct;
if (vo->driver->preinit(vo))
goto error;
return vo;
error:
talloc_free(vo);
return NULL;
}
int vo_control(struct vo *vo, uint32_t request, void *data)
{
return vo->driver->control(vo, request, data);
}
void vo_queue_image(struct vo *vo, struct mp_image *mpi)
{
if (!vo->config_ok)
return;
if (vo->driver->buffer_frames) {
vo->driver->draw_image(vo, mpi);
return;
}
vo->frame_loaded = true;
vo->next_pts = mpi->pts;
vo->next_pts2 = MP_NOPTS_VALUE;
assert(!vo->waiting_mpi);
vo->waiting_mpi = mp_image_new_ref(mpi);
}
int vo_redraw_frame(struct vo *vo)
{
if (!vo->config_ok)
return -1;
if (vo_control(vo, VOCTRL_REDRAW_FRAME, NULL) == true) {
vo->want_redraw = false;
vo->redrawing = true;
return 0;
}
return -1;
}
bool vo_get_want_redraw(struct vo *vo)
{
if (!vo->config_ok)
return false;
return vo->want_redraw;
}
int vo_get_buffered_frame(struct vo *vo, bool eof)
{
if (!vo->config_ok)
return -1;
if (vo->frame_loaded)
return 0;
if (!vo->driver->buffer_frames)
return -1;
vo->driver->get_buffered_frame(vo, eof);
return vo->frame_loaded ? 0 : -1;
}
void vo_skip_frame(struct vo *vo)
{
vo_control(vo, VOCTRL_SKIPFRAME, NULL);
vo->frame_loaded = false;
mp_image_unrefp(&vo->waiting_mpi);
}
void vo_new_frame_imminent(struct vo *vo)
{
if (vo->driver->buffer_frames)
vo_control(vo, VOCTRL_NEWFRAME, NULL);
else {
assert(vo->frame_loaded);
assert(vo->waiting_mpi);
assert(vo->waiting_mpi->pts == vo->next_pts);
vo->driver->draw_image(vo, vo->waiting_mpi);
mp_image_unrefp(&vo->waiting_mpi);
}
}
void vo_draw_osd(struct vo *vo, struct osd_state *osd)
{
if (vo->config_ok && vo->driver->draw_osd)
vo->driver->draw_osd(vo, osd);
}
void vo_flip_page(struct vo *vo, unsigned int pts_us, int duration)
{
if (!vo->config_ok)
return;
if (!vo->redrawing) {
vo->frame_loaded = false;
vo->next_pts = MP_NOPTS_VALUE;
vo->next_pts2 = MP_NOPTS_VALUE;
}
vo->want_redraw = false;
vo->redrawing = false;
if (vo->driver->flip_page_timed)
vo->driver->flip_page_timed(vo, pts_us, duration);
else
vo->driver->flip_page(vo);
vo->hasframe = true;
}
void vo_check_events(struct vo *vo)
{
if (!vo->config_ok) {
if (vo->registered_fd != -1)
mp_input_rm_key_fd(vo->input_ctx, vo->registered_fd);
vo->registered_fd = -1;
return;
}
vo_control(vo, VOCTRL_CHECK_EVENTS, NULL);
}
void vo_seek_reset(struct vo *vo)
{
vo_control(vo, VOCTRL_RESET, NULL);
vo->frame_loaded = false;
vo->next_pts = MP_NOPTS_VALUE;
vo->next_pts2 = MP_NOPTS_VALUE;
vo->hasframe = false;
mp_image_unrefp(&vo->waiting_mpi);
}
void vo_destroy(struct vo *vo)
{
if (vo->registered_fd != -1)
mp_input_rm_key_fd(vo->input_ctx, vo->registered_fd);
mp_image_unrefp(&vo->waiting_mpi);
vo->driver->uninit(vo);
talloc_free(vo);
}
struct vo *init_best_video_out(struct mpv_global *global,
struct input_ctx *input_ctx,
struct encode_lavc_context *encode_lavc_ctx)
{
struct m_obj_settings *vo_list = global->opts->vo.video_driver_list;
// first try the preferred drivers, with their optional subdevice param:
if (vo_list && vo_list[0].name) {
for (int n = 0; vo_list[n].name; n++) {
// Something like "-vo name," allows fallback to autoprobing.
if (strlen(vo_list[n].name) == 0)
goto autoprobe;
struct vo *vo = vo_create(global, input_ctx, encode_lavc_ctx,
vo_list[n].name, vo_list[n].attribs);
if (vo)
return vo;
}
return NULL;
}
autoprobe:
// now try the rest...
for (int i = 0; video_out_drivers[i]; i++) {
struct vo *vo = vo_create(global, input_ctx, encode_lavc_ctx,
(char *)video_out_drivers[i]->name, NULL);
if (vo)
return vo;
}
return NULL;
}
// Fit *w/*h into the size specified by geo.
static void apply_autofit(int *w, int *h, int scr_w, int scr_h,
struct m_geometry *geo, bool allow_upscale)
{
if (!geo->wh_valid)
return;
int dummy;
int n_w = *w, n_h = *h;
m_geometry_apply(&dummy, &dummy, &n_w, &n_h, scr_w, scr_h, geo);
if (!allow_upscale && *w <= n_w && *h <= n_h)
return;
// If aspect mismatches, always make the window smaller than the fit box
double asp = (double)*w / *h;
double n_asp = (double)n_w / n_h;
if (n_asp <= asp) {
*w = n_w;
*h = n_w / asp;
} else {
*w = n_h * asp;
*h = n_h;
}
}
// Set window size (vo->dwidth/dheight) and position (vo->dx/dy) according to
// the video display size d_w/d_h.
// NOTE: currently, all GUI backends do their own handling of window geometry
// additional to this code. This is to deal with initial window placement,
// fullscreen handling, avoiding resize on config() with no size change,
// multi-monitor stuff, and possibly more.
static void determine_window_geometry(struct vo *vo, int d_w, int d_h)
{
struct mp_vo_opts *opts = vo->opts;
int scr_w = opts->screenwidth;
int scr_h = opts->screenheight;
aspect_calc_monitor(vo, &d_w, &d_h);
apply_autofit(&d_w, &d_h, scr_w, scr_h, &opts->autofit, true);
apply_autofit(&d_w, &d_h, scr_w, scr_h, &opts->autofit_larger, false);
vo->dx = (int)(opts->screenwidth - d_w) / 2;
vo->dy = (int)(opts->screenheight - d_h) / 2;
m_geometry_apply(&vo->dx, &vo->dy, &d_w, &d_h, scr_w, scr_h,
&opts->geometry);
vo->dx += vo->xinerama_x;
vo->dy += vo->xinerama_y;
vo->dwidth = d_w;
vo->dheight = d_h;
}
static int event_fd_callback(void *ctx, int fd)
{
struct vo *vo = ctx;
vo_check_events(vo);
return MP_INPUT_NOTHING;
}
int vo_reconfig(struct vo *vo, struct mp_image_params *params, int flags)
{
int d_width = params->d_w;
int d_height = params->d_h;
aspect_save_videores(vo, params->w, params->h, d_width, d_height);
if (vo_control(vo, VOCTRL_UPDATE_SCREENINFO, NULL) == VO_TRUE) {
determine_window_geometry(vo, params->d_w, params->d_h);
d_width = vo->dwidth;
d_height = vo->dheight;
}
vo->dwidth = d_width;
vo->dheight = d_height;
talloc_free(vo->params);
vo->params = NULL;
struct mp_image_params p2 = *params;
int ret;
if (vo->driver->reconfig) {
ret = vo->driver->reconfig(vo, &p2, flags);
} else {
// Old config() takes window size, while reconfig() takes aspect (!)
ret = vo->driver->config(vo, p2.w, p2.h, d_width, d_height, flags,
p2.imgfmt);
ret = ret ? -1 : 0;
}
vo->config_ok = (ret >= 0);
vo->config_count += vo->config_ok;
if (vo->config_ok)
vo->params = talloc_memdup(vo, &p2, sizeof(p2));
if (vo->registered_fd == -1 && vo->event_fd != -1 && vo->config_ok) {
mp_input_add_key_fd(vo->input_ctx, vo->event_fd, 1, event_fd_callback,
NULL, vo);
vo->registered_fd = vo->event_fd;
}
vo->frame_loaded = false;
vo->waiting_mpi = NULL;
vo->redrawing = false;
vo->hasframe = false;
if (vo->config_ok) {
// Legacy
struct mp_csp_details csp;
if (vo_control(vo, VOCTRL_GET_YUV_COLORSPACE, &csp) > 0) {
csp.levels_in = params->colorlevels;
csp.levels_out = params->outputlevels;
csp.format = params->colorspace;
vo_control(vo, VOCTRL_SET_YUV_COLORSPACE, &csp);
}
}
return ret;
}
/**
* \brief lookup an integer in a table, table must have 0 as the last key
* \param key key to search for
* \result translation corresponding to key or "to" value of last mapping
* if not found.
*/
int lookup_keymap_table(const struct mp_keymap *map, int key) {
while (map->from && map->from != key) map++;
return map->to;
}
static void print_video_rect(struct vo *vo, struct mp_rect src,
struct mp_rect dst, struct mp_osd_res osd)
{
int sw = src.x1 - src.x0, sh = src.y1 - src.y0;
int dw = dst.x1 - dst.x0, dh = dst.y1 - dst.y0;
MP_VERBOSE(&vo->vo_log, "Window size: %dx%d\n",
vo->dwidth, vo->dheight);
MP_VERBOSE(&vo->vo_log, "Video source: %dx%d (%dx%d)\n",
vo->aspdat.orgw, vo->aspdat.orgh,
vo->aspdat.prew, vo->aspdat.preh);
MP_VERBOSE(&vo->vo_log, "Video display: (%d, %d) %dx%d -> (%d, %d) %dx%d\n",
src.x0, src.y0, sw, sh, dst.x0, dst.y0, dw, dh);
MP_VERBOSE(&vo->vo_log, "Video scale: %f/%f\n",
(double)dw / sw, (double)dh / sh);
MP_VERBOSE(&vo->vo_log, "OSD borders: l=%d t=%d r=%d b=%d\n",
osd.ml, osd.mt, osd.mr, osd.mb);
MP_VERBOSE(&vo->vo_log, "Video borders: l=%d t=%d r=%d b=%d\n",
dst.x0, dst.y0, vo->dwidth - dst.x1, vo->dheight - dst.y1);
}
// Clamp [start, end) to range [0, size) with various fallbacks.
static void clamp_size(int size, int *start, int *end)
{
*start = FFMAX(0, *start);
*end = FFMIN(size, *end);
if (*start >= *end) {
*start = 0;
*end = 1;
}
}
// Round source to a multiple of 2, this is at least needed for vo_direct3d
// and ATI cards.
#define VID_SRC_ROUND_UP(x) (((x) + 1) & ~1)
static void src_dst_split_scaling(int src_size, int dst_size,
int scaled_src_size, bool unscaled,
float zoom, float align, float pan,
int *src_start, int *src_end,
int *dst_start, int *dst_end,
int *osd_margin_a, int *osd_margin_b)
{
if (unscaled) {
scaled_src_size = src_size;
zoom = 0.0;
}
scaled_src_size += zoom * scaled_src_size;
align = (align + 1) / 2;
*src_start = 0;
*src_end = src_size;
*dst_start = (dst_size - scaled_src_size) * align + pan * scaled_src_size;
*dst_end = *dst_start + scaled_src_size;
// Distance of screen frame to video
*osd_margin_a = *dst_start;
*osd_margin_b = dst_size - *dst_end;
// Clip to screen
int s_src = *src_end - *src_start;
int s_dst = *dst_end - *dst_start;
if (*dst_start < 0) {
int border = -(*dst_start) * s_src / s_dst;
*src_start += VID_SRC_ROUND_UP(border);
*dst_start = 0;
}
if (*dst_end > dst_size) {
int border = (*dst_end - dst_size) * s_src / s_dst;
*src_end -= VID_SRC_ROUND_UP(border);
*dst_end = dst_size;
}
if (unscaled) {
// Force unscaled by reducing the range for src or dst
int src_s = *src_end - *src_start;
int dst_s = *dst_end - *dst_start;
if (src_s > dst_s) {
*src_end = *src_start + dst_s;
} else if (src_s < dst_s) {
*dst_end = *dst_start + src_s;
}
}
// For sanity: avoid bothering VOs with corner cases
clamp_size(src_size, src_start, src_end);
clamp_size(dst_size, dst_start, dst_end);
}
// Calculate the appropriate source and destination rectangle to
// get a correctly scaled picture, including pan-scan.
// out_src: visible part of the video
// out_dst: area of screen covered by the video source rectangle
// out_osd: OSD size, OSD margins, etc.
void vo_get_src_dst_rects(struct vo *vo, struct mp_rect *out_src,
struct mp_rect *out_dst, struct mp_osd_res *out_osd)
{
struct mp_vo_opts *opts = vo->opts;
int src_w = vo->aspdat.orgw;
int src_h = vo->aspdat.orgh;
struct mp_rect dst = {0, 0, vo->dwidth, vo->dheight};
struct mp_rect src = {0, 0, src_w, src_h};
struct mp_osd_res osd = {
.w = vo->dwidth,
.h = vo->dheight,
.display_par = vo->aspdat.monitor_par,
};
if (opts->keepaspect) {
int scaled_width, scaled_height;
aspect_calc_panscan(vo, &scaled_width, &scaled_height);
src_dst_split_scaling(src_w, vo->dwidth, scaled_width, opts->unscaled,
opts->zoom, opts->align_x, opts->pan_x,
&src.x0, &src.x1, &dst.x0, &dst.x1,
&osd.ml, &osd.mr);
src_dst_split_scaling(src_h, vo->dheight, scaled_height, opts->unscaled,
opts->zoom, opts->align_y, opts->pan_y,
&src.y0, &src.y1, &dst.y0, &dst.y1,
&osd.mt, &osd.mb);
}
*out_src = src;
*out_dst = dst;
*out_osd = osd;
print_video_rect(vo, src, dst, osd);
}
// Return the window title the VO should set. Always returns a null terminated
// string. The string is valid until frontend code is invoked again. Copy it if
// you need to keep the string for an extended period of time.
const char *vo_get_window_title(struct vo *vo)
{
if (!vo->window_title)
vo->window_title = talloc_strdup(vo, "");
return vo->window_title;
}
/**
* Generates a mouse movement message if those are enable and sends it
* to the "main" MPlayer.
*
* \param posx new x position of mouse
* \param posy new y position of mouse
*/
void vo_mouse_movement(struct vo *vo, int posx, int posy)
{
if (!vo->opts->enable_mouse_movements)
return;
float p[2] = {posx, posy};
vo_control(vo, VOCTRL_WINDOW_TO_OSD_COORDS, p);
mp_input_set_mouse_pos(vo->input_ctx, p[0], p[1]);
}
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