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🎥 Command line media player
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222/* * 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/>. */
/* Stuff for correct aspect scaling. */#include "aspect.h"#include "math.h"#include "vo.h"#include "common/msg.h"#include "options/options.h"#include "video/mp_image.h"
#include "vo.h"#include "sub/osd.h"
static void aspect_calc_panscan(struct mp_vo_opts *opts, int w, int h, int d_w, int d_h, int unscaled, int window_w, int window_h, double monitor_par, int *out_w, int *out_h){ int fwidth = window_w; int fheight = (float)window_w / d_w * d_h / monitor_par; if (fheight > window_h || fheight < h) { int tmpw = (float)window_h / d_h * d_w * monitor_par; if (tmpw <= window_w) { fheight = window_h; fwidth = tmpw; } }
int vo_panscan_area = window_h - fheight; double f_w = fwidth / (double)MPMAX(fheight, 1); double f_h = 1; if (vo_panscan_area == 0) { vo_panscan_area = window_w - fwidth; f_w = 1; f_h = fheight / (double)MPMAX(fwidth, 1); }
if (unscaled) { vo_panscan_area = 0; if (unscaled != 2 || (d_w <= window_w && d_h <= window_h)) { fwidth = d_w * monitor_par; fheight = d_h; } }
*out_w = fwidth + vo_panscan_area * opts->panscan * f_w; *out_h = fheight + vo_panscan_area * opts->panscan * f_h;}
// Clamp [start, end) to range [0, size) with various fallbacks.static void clamp_size(int size, int *start, int *end){ *start = MPMAX(0, *start); *end = MPMIN(size, *end); if (*start >= *end) { *start = 0; *end = 1; }}
static void src_dst_split_scaling(int src_size, int dst_size, int scaled_src_size, float zoom, float align, float pan, float scale, bool recenter, int *src_start, int *src_end, int *dst_start, int *dst_end, int *osd_margin_a, int *osd_margin_b){ scaled_src_size *= powf(2, zoom) * scale; scaled_src_size = MPMAX(scaled_src_size, 1); if (recenter && dst_size >= scaled_src_size) align = 0; align = (align + 1) / 2;
*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 += border; *dst_start = 0; } if (*dst_end > dst_size) { int border = (*dst_end - dst_size) * s_src / s_dst; *src_end -= border; *dst_end = dst_size; }
// For sanity: avoid bothering VOs with corner cases clamp_size(src_size, src_start, src_end); clamp_size(dst_size, dst_start, dst_end);}
static void calc_margin(float opts[2], int out[2], int size){ out[0] = MPCLAMP((int)(opts[0] * size), 0, size); out[1] = MPCLAMP((int)(opts[1] * size), 0, size);
if (out[0] + out[1] >= size) { // This case is not really supported. Show an error by 1 pixel. out[0] = 0; out[1] = MPMAX(0, size - 1); }}
void mp_get_src_dst_rects(struct mp_log *log, struct mp_vo_opts *opts, int vo_caps, struct mp_image_params *video, int window_w, int window_h, double monitor_par, struct mp_rect *out_src, struct mp_rect *out_dst, struct mp_osd_res *out_osd){ int src_w = video->w; int src_h = video->h; int src_dw, src_dh;
mp_image_params_get_dsize(video, &src_dw, &src_dh); window_w = MPMAX(1, window_w); window_h = MPMAX(1, window_h);
int margin_x[2] = {0}; int margin_y[2] = {0}; if (opts->keepaspect) { calc_margin(opts->margin_x, margin_x, window_w); calc_margin(opts->margin_y, margin_y, window_h); }
int vid_window_w = window_w - margin_x[0] - margin_x[1]; int vid_window_h = window_h - margin_y[0] - margin_y[1];
struct mp_rect dst = {0, 0, window_w, window_h}; struct mp_rect src = {0, 0, src_w, src_h}; if (mp_image_crop_valid(video)) src = video->crop;
if (vo_caps & VO_CAP_ROTATE90) { if (video->rotate % 180 == 90) { MPSWAP(int, src_w, src_h); MPSWAP(int, src_dw, src_dh); } mp_rect_rotate(&src, src_w, src_h, video->rotate); }
struct mp_osd_res osd = { .w = window_w, .h = window_h, .display_par = monitor_par, };
if (opts->keepaspect) { int scaled_width, scaled_height; aspect_calc_panscan(opts, src_w, src_h, src_dw, src_dh, opts->unscaled, vid_window_w, vid_window_h, monitor_par, &scaled_width, &scaled_height); src_dst_split_scaling(src_w, vid_window_w, scaled_width, opts->zoom, opts->align_x, opts->pan_x, opts->scale_x, opts->recenter, &src.x0, &src.x1, &dst.x0, &dst.x1, &osd.ml, &osd.mr); src_dst_split_scaling(src_h, vid_window_h, scaled_height, opts->zoom, opts->align_y, opts->pan_y, opts->scale_y, opts->recenter, &src.y0, &src.y1, &dst.y0, &dst.y1, &osd.mt, &osd.mb); }
dst.x0 += margin_x[0]; dst.y0 += margin_y[0]; dst.x1 += margin_x[0]; dst.y1 += margin_y[0];
// OSD really uses the full window, but was computed on the margin-cut // video sub-window. Correct it to the full window. osd.ml += margin_x[0]; osd.mr += margin_x[1]; osd.mt += margin_y[0]; osd.mb += margin_y[1];
*out_src = src; *out_dst = dst; *out_osd = 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(log, "Window size: %dx%d (Borders: l=%d t=%d r=%d b=%d)\n", window_w, window_h, margin_x[0], margin_y[0], margin_x[1], margin_y[1]); mp_verbose(log, "Video source: %dx%d (%d:%d)\n", video->w, video->h, video->p_w, video->p_h); mp_verbose(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(log, "Video scale: %f/%f\n", (double)dw / sw, (double)dh / sh); mp_verbose(log, "OSD borders: l=%d t=%d r=%d b=%d\n", osd.ml, osd.mt, osd.mr, osd.mb); mp_verbose(log, "Video borders: l=%d t=%d r=%d b=%d\n", dst.x0, dst.y0, window_w - dst.x1, window_h - dst.y1);}