git.sesse.net Git - vlc/blob - src/video_output/vout_pictures.c

   1 /*****************************************************************************
   2  * vout_pictures.c : picture management functions
   3  *****************************************************************************
   4  * Copyright (C) 2000-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35 #include <libvlc.h>
  36 #include <vlc_vout.h>
  37 #include <vlc_osd.h>
  38 #include <vlc_filter.h>
  39 #include <vlc_image.h>
  40 #include <vlc_block.h>
  41 #include <vlc_picture_fifo.h>
  42 #include <vlc_picture_pool.h>
  43
  44 #include "vout_internal.h"
  45
  46 /**
  47  * It retreives a picture from the vout or NULL if no pictures are
  48  * available yet.
  49  *
  50  * You MUST call vout_PutPicture or vout_ReleasePicture on it.
  51  *
  52  * You may use vout_HoldPicture(paired with vout_ReleasePicture) to keep a
  53  * read-only reference.
  54  */
  55 picture_t *vout_GetPicture( vout_thread_t *p_vout )
  56 {
  57     /* Get lock */
  58     vlc_mutex_lock( &p_vout->p->picture_lock );
  59     picture_t *p_pic = picture_pool_Get(p_vout->p->decoder_pool);
  60     if (p_pic) {
  61         picture_Reset(p_pic);
  62         p_pic->p_next = NULL;
  63     }
  64     vlc_mutex_unlock( &p_vout->p->picture_lock );
  65
  66     return p_pic;
  67 }
  68
  69 /**
  70  * It gives to the vout a picture to be displayed.
  71  *
  72  * The given picture MUST comes from vout_GetPicture.
  73  *
  74  * Becareful, after vout_PutPicture is called, picture_t::p_next cannot be
  75  * read/used.
  76  */
  77 void vout_PutPicture( vout_thread_t *p_vout, picture_t *p_pic )
  78 {
  79     vlc_mutex_lock( &p_vout->p->picture_lock );
  80
  81     p_pic->p_next = NULL;
  82     picture_fifo_Push(p_vout->p->decoder_fifo, p_pic);
  83
  84     vlc_mutex_unlock( &p_vout->p->picture_lock );
  85
  86     vout_control_Wake( &p_vout->p->control);
  87 }
  88
  89 /**
  90  * It releases a picture retreived by vout_GetPicture.
  91  */
  92 void vout_ReleasePicture( vout_thread_t *p_vout, picture_t *p_pic  )
  93 {
  94     vlc_mutex_lock( &p_vout->p->picture_lock );
  95
  96     picture_Release( p_pic );
  97
  98     vlc_mutex_unlock( &p_vout->p->picture_lock );
  99
 100     vout_control_Wake( &p_vout->p->control);
 101 }
 102
 103 /**
 104  * It increment the reference counter of a picture retreived by
 105  * vout_GetPicture.
 106  */
 107 void vout_HoldPicture( vout_thread_t *p_vout, picture_t *p_pic )
 108 {
 109     vlc_mutex_lock( &p_vout->p->picture_lock );
 110
 111     picture_Hold( p_pic );
 112
 113     vlc_mutex_unlock( &p_vout->p->picture_lock );
 114 }
 115
 116 /**
 117  * Allocate a new picture in the heap.
 118  *
 119  * This function allocates a fake direct buffer in memory, which can be
 120  * used exactly like a video buffer. The video output thread then manages
 121  * how it gets displayed.
 122  */
 123 static int vout_AllocatePicture( picture_t *p_pic,
 124                                  vlc_fourcc_t i_chroma,
 125                                  int i_width, int i_height,
 126                                  int i_sar_num, int i_sar_den )
 127 {
 128     /* Make sure the real dimensions are a multiple of 16 */
 129     if( picture_Setup( p_pic, i_chroma, i_width, i_height,
 130                        i_sar_num, i_sar_den ) != VLC_SUCCESS )
 131         return VLC_EGENERIC;
 132
 133     /* Calculate how big the new image should be */
 134     size_t i_bytes = 0;
 135     for( int i = 0; i < p_pic->i_planes; i++ )
 136     {
 137         const plane_t *p = &p_pic->p[i];
 138
 139         if( p->i_pitch <= 0 || p->i_lines <= 0 ||
 140             p->i_pitch > (SIZE_MAX - i_bytes)/p->i_lines )
 141         {
 142             p_pic->i_planes = 0;
 143             return VLC_ENOMEM;
 144         }
 145         i_bytes += p->i_pitch * p->i_lines;
 146     }
 147
 148     uint8_t *p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 149     if( !p_data )
 150     {
 151         p_pic->i_planes = 0;
 152         return VLC_EGENERIC;
 153     }
 154
 155     /* Fill the p_pixels field for each plane */
 156     p_pic->p[0].p_pixels = p_data;
 157     for( int i = 1; i < p_pic->i_planes; i++ )
 158     {
 159         p_pic->p[i].p_pixels = &p_pic->p[i-1].p_pixels[ p_pic->p[i-1].i_lines *
 160                                                         p_pic->p[i-1].i_pitch ];
 161     }
 162
 163     return VLC_SUCCESS;
 164 }
 165
 166 /*****************************************************************************
 167  *
 168  *****************************************************************************/
 169 static void PictureReleaseCallback( picture_t *p_picture )
 170 {
 171     if( --p_picture->i_refcount > 0 )
 172         return;
 173     picture_Delete( p_picture );
 174 }
 175
 176 /*****************************************************************************
 177  *
 178  *****************************************************************************/
 179 void picture_Reset( picture_t *p_picture )
 180 {
 181     /* */
 182     p_picture->date = VLC_TS_INVALID;
 183     p_picture->b_force = false;
 184     p_picture->b_progressive = false;
 185     p_picture->i_nb_fields = 0;
 186     p_picture->b_top_field_first = false;
 187     picture_CleanupQuant( p_picture );
 188 }
 189
 190 /*****************************************************************************
 191  *
 192  *****************************************************************************/
 193 typedef struct
 194 {
 195     unsigned     i_plane_count;
 196     struct
 197     {
 198         struct
 199         {
 200             unsigned i_num;
 201             unsigned i_den;
 202         } w;
 203         struct
 204         {
 205             unsigned i_num;
 206             unsigned i_den;
 207         } h;
 208     } p[VOUT_MAX_PLANES];
 209     unsigned i_pixel_size;
 210
 211 } chroma_description_t;
 212
 213 #define PLANAR(n, w_den, h_den) \
 214     { n, { {{1,1}, {1,1}}, {{1,w_den}, {1,h_den}}, {{1,w_den}, {1,h_den}}, {{1,1}, {1,1}} }, 1 }
 215 #define PACKED(size) \
 216     { 1, { {{1,1}, {1,1}} }, size }
 217
 218 static const struct
 219 {
 220     vlc_fourcc_t            p_fourcc[5];
 221     chroma_description_t    description;
 222 } p_chromas[] = {
 223     { { VLC_CODEC_I411, 0 },                                 PLANAR(3, 4, 1) },
 224     { { VLC_CODEC_I410, VLC_CODEC_YV9, 0 },                  PLANAR(3, 4, 4) },
 225     { { VLC_CODEC_YV12, VLC_CODEC_I420, VLC_CODEC_J420, 0 }, PLANAR(3, 2, 2) },
 226     { { VLC_CODEC_I422, VLC_CODEC_J422, 0 },                 PLANAR(3, 2, 1) },
 227     { { VLC_CODEC_I440, VLC_CODEC_J440, 0 },                 PLANAR(3, 1, 2) },
 228     { { VLC_CODEC_I444, VLC_CODEC_J444, 0 },                 PLANAR(3, 1, 1) },
 229     { { VLC_CODEC_YUVA, 0 },                                 PLANAR(4, 1, 1) },
 230
 231     { { VLC_CODEC_UYVY, VLC_CODEC_VYUY, VLC_CODEC_YUYV, VLC_CODEC_YVYU, 0 }, PACKED(2) },
 232     { { VLC_CODEC_RGB8, VLC_CODEC_GREY, VLC_CODEC_YUVP, VLC_CODEC_RGBP, 0 }, PACKED(1) },
 233     { { VLC_CODEC_RGB16, VLC_CODEC_RGB15, 0 },                               PACKED(2) },
 234     { { VLC_CODEC_RGB24, 0 },                                                PACKED(3) },
 235     { { VLC_CODEC_RGB32, VLC_CODEC_RGBA, 0 },                                PACKED(4) },
 236
 237     { { VLC_CODEC_Y211, 0 }, { 1, { {{1,4}, {1,1}} }, 4 } },
 238
 239     { {0}, { 0, {}, 0 } }
 240 };
 241
 242 #undef PACKED
 243 #undef PLANAR
 244
 245 static const chroma_description_t *vlc_fourcc_GetChromaDescription( vlc_fourcc_t i_fourcc )
 246 {
 247     for( unsigned i = 0; p_chromas[i].p_fourcc[0]; i++ )
 248     {
 249         const vlc_fourcc_t *p_fourcc = p_chromas[i].p_fourcc;
 250         for( unsigned j = 0; p_fourcc[j]; j++ )
 251         {
 252             if( p_fourcc[j] == i_fourcc )
 253                 return &p_chromas[i].description;
 254         }
 255     }
 256     return NULL;
 257 }
 258
 259 static int LCM( int a, int b )
 260 {
 261     return a * b / GCD( a, b );
 262 }
 263
 264 int picture_Setup( picture_t *p_picture, vlc_fourcc_t i_chroma,
 265                    int i_width, int i_height, int i_sar_num, int i_sar_den )
 266 {
 267     /* Store default values */
 268     p_picture->i_planes = 0;
 269     for( unsigned i = 0; i < VOUT_MAX_PLANES; i++ )
 270     {
 271         plane_t *p = &p_picture->p[i];
 272         p->p_pixels = NULL;
 273         p->i_pixel_pitch = 0;
 274     }
 275
 276     p_picture->pf_release = NULL;
 277     p_picture->p_release_sys = NULL;
 278     p_picture->i_refcount = 0;
 279
 280     p_picture->i_qtype = QTYPE_NONE;
 281     p_picture->i_qstride = 0;
 282     p_picture->p_q = NULL;
 283
 284     video_format_Setup( &p_picture->format, i_chroma, i_width, i_height,
 285                         i_sar_num, i_sar_den );
 286
 287     const chroma_description_t *p_dsc =
 288         vlc_fourcc_GetChromaDescription( p_picture->format.i_chroma );
 289     if( !p_dsc )
 290         return VLC_EGENERIC;
 291
 292     /* We want V (width/height) to respect:
 293         (V * p_dsc->p[i].w.i_num) % p_dsc->p[i].w.i_den == 0
 294         (V * p_dsc->p[i].w.i_num/p_dsc->p[i].w.i_den * p_dsc->i_pixel_size) % 16 == 0
 295        Which is respected if you have
 296        V % lcm( p_dsc->p[0..planes].w.i_den * 16) == 0
 297     */
 298     int i_modulo_w = 1;
 299     int i_modulo_h = 1;
 300     int i_ratio_h  = 1;
 301     for( unsigned i = 0; i < p_dsc->i_plane_count; i++ )
 302     {
 303         i_modulo_w = LCM( i_modulo_w, 16 * p_dsc->p[i].w.i_den );
 304         i_modulo_h = LCM( i_modulo_h, 16 * p_dsc->p[i].h.i_den );
 305         if( i_ratio_h < p_dsc->p[i].h.i_den )
 306             i_ratio_h = p_dsc->p[i].h.i_den;
 307     }
 308
 309     const int i_width_aligned  = ( i_width  + i_modulo_w - 1 ) / i_modulo_w * i_modulo_w;
 310     const int i_height_aligned = ( i_height + i_modulo_h - 1 ) / i_modulo_h * i_modulo_h;
 311     const int i_height_extra   = 2 * i_ratio_h; /* This one is a hack for some ASM functions */
 312     for( unsigned i = 0; i < p_dsc->i_plane_count; i++ )
 313     {
 314         plane_t *p = &p_picture->p[i];
 315
 316         p->i_lines         = (i_height_aligned + i_height_extra ) * p_dsc->p[i].h.i_num / p_dsc->p[i].h.i_den;
 317         p->i_visible_lines = i_height * p_dsc->p[i].h.i_num / p_dsc->p[i].h.i_den;
 318         p->i_pitch         = i_width_aligned * p_dsc->p[i].w.i_num / p_dsc->p[i].w.i_den * p_dsc->i_pixel_size;
 319         p->i_visible_pitch = i_width * p_dsc->p[i].w.i_num / p_dsc->p[i].w.i_den * p_dsc->i_pixel_size;
 320         p->i_pixel_pitch   = p_dsc->i_pixel_size;
 321
 322         assert( (p->i_pitch % 16) == 0 );
 323     }
 324     p_picture->i_planes  = p_dsc->i_plane_count;
 325
 326     return VLC_SUCCESS;
 327 }
 328
 329 /*****************************************************************************
 330  *
 331  *****************************************************************************/
 332 picture_t *picture_NewFromResource( const video_format_t *p_fmt, const picture_resource_t *p_resource )
 333 {
 334     video_format_t fmt = *p_fmt;
 335
 336     /* It is needed to be sure all informations are filled */
 337     video_format_Setup( &fmt, p_fmt->i_chroma,
 338                               p_fmt->i_width, p_fmt->i_height,
 339                               p_fmt->i_sar_num, p_fmt->i_sar_den );
 340
 341     /* */
 342     picture_t *p_picture = calloc( 1, sizeof(*p_picture) );
 343     if( !p_picture )
 344         return NULL;
 345
 346     if( p_resource )
 347     {
 348         if( picture_Setup( p_picture, fmt.i_chroma, fmt.i_width, fmt.i_height,
 349                            fmt.i_sar_num, fmt.i_sar_den ) )
 350         {
 351             free( p_picture );
 352             return NULL;
 353         }
 354         p_picture->p_sys = p_resource->p_sys;
 355
 356         for( int i = 0; i < p_picture->i_planes; i++ )
 357         {
 358             p_picture->p[i].p_pixels = p_resource->p[i].p_pixels;
 359             p_picture->p[i].i_lines  = p_resource->p[i].i_lines;
 360             p_picture->p[i].i_pitch  = p_resource->p[i].i_pitch;
 361         }
 362     }
 363     else
 364     {
 365         if( vout_AllocatePicture( p_picture,
 366                                   fmt.i_chroma, fmt.i_width, fmt.i_height,
 367                                   fmt.i_sar_num, fmt.i_sar_den ) )
 368         {
 369             free( p_picture );
 370             return NULL;
 371         }
 372     }
 373     /* */
 374     p_picture->format = fmt;
 375     p_picture->i_refcount = 1;
 376     p_picture->pf_release = PictureReleaseCallback;
 377
 378     return p_picture;
 379 }
 380 picture_t *picture_NewFromFormat( const video_format_t *p_fmt )
 381 {
 382     return picture_NewFromResource( p_fmt, NULL );
 383 }
 384 picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_sar_num, int i_sar_den )
 385 {
 386     video_format_t fmt;
 387
 388     memset( &fmt, 0, sizeof(fmt) );
 389     video_format_Setup( &fmt, i_chroma, i_width, i_height,
 390                         i_sar_num, i_sar_den );
 391
 392     return picture_NewFromFormat( &fmt );
 393 }
 394
 395 /*****************************************************************************
 396  *
 397  *****************************************************************************/
 398 void picture_Delete( picture_t *p_picture )
 399 {
 400     assert( p_picture && p_picture->i_refcount == 0 );
 401     assert( p_picture->p_release_sys == NULL );
 402
 403     free( p_picture->p_q );
 404     free( p_picture->p_data_orig );
 405     free( p_picture->p_sys );
 406     free( p_picture );
 407 }
 408
 409 /*****************************************************************************
 410  *
 411  *****************************************************************************/
 412 void picture_CopyPixels( picture_t *p_dst, const picture_t *p_src )
 413 {
 414     int i;
 415
 416     for( i = 0; i < p_src->i_planes ; i++ )
 417         plane_CopyPixels( p_dst->p+i, p_src->p+i );
 418 }
 419
 420 void plane_CopyPixels( plane_t *p_dst, const plane_t *p_src )
 421 {
 422     const unsigned i_width  = __MIN( p_dst->i_visible_pitch,
 423                                      p_src->i_visible_pitch );
 424     const unsigned i_height = __MIN( p_dst->i_visible_lines,
 425                                      p_src->i_visible_lines );
 426
 427     if( p_src->i_pitch == p_dst->i_pitch )
 428     {
 429         /* There are margins, but with the same width : perfect ! */
 430         vlc_memcpy( p_dst->p_pixels, p_src->p_pixels,
 431                     p_src->i_pitch * i_height );
 432     }
 433     else
 434     {
 435         /* We need to proceed line by line */
 436         uint8_t *p_in = p_src->p_pixels;
 437         uint8_t *p_out = p_dst->p_pixels;
 438         int i_line;
 439
 440         assert( p_in );
 441         assert( p_out );
 442
 443         for( i_line = i_height; i_line--; )
 444         {
 445             vlc_memcpy( p_out, p_in, i_width );
 446             p_in += p_src->i_pitch;
 447             p_out += p_dst->i_pitch;
 448         }
 449     }
 450 }
 451
 452 /*****************************************************************************
 453  *
 454  *****************************************************************************/
 455 int picture_Export( vlc_object_t *p_obj,
 456                     block_t **pp_image,
 457                     video_format_t *p_fmt,
 458                     picture_t *p_picture,
 459                     vlc_fourcc_t i_format,
 460                     int i_override_width, int i_override_height )
 461 {
 462     /* */
 463     video_format_t fmt_in = p_picture->format;
 464     if( fmt_in.i_sar_num <= 0 || fmt_in.i_sar_den <= 0 )
 465     {
 466         fmt_in.i_sar_num =
 467         fmt_in.i_sar_den = 1;
 468     }
 469
 470     /* */
 471     video_format_t fmt_out;
 472     memset( &fmt_out, 0, sizeof(fmt_out) );
 473     fmt_out.i_sar_num =
 474     fmt_out.i_sar_den = 1;
 475     fmt_out.i_chroma  = i_format;
 476
 477     /* compute original width/height */
 478     unsigned int i_original_width;
 479     unsigned int i_original_height;
 480     if( fmt_in.i_sar_num >= fmt_in.i_sar_den )
 481     {
 482         i_original_width = fmt_in.i_width * fmt_in.i_sar_num / fmt_in.i_sar_den;
 483         i_original_height = fmt_in.i_height;
 484     }
 485     else
 486     {
 487         i_original_width =  fmt_in.i_width;
 488         i_original_height = fmt_in.i_height * fmt_in.i_sar_den / fmt_in.i_sar_num;
 489     }
 490
 491     /* */
 492     fmt_out.i_width  = ( i_override_width < 0 ) ?
 493                        i_original_width : i_override_width;
 494     fmt_out.i_height = ( i_override_height < 0 ) ?
 495                        i_original_height : i_override_height;
 496
 497     /* scale if only one direction is provided */
 498     if( fmt_out.i_height == 0 && fmt_out.i_width > 0 )
 499     {
 500         fmt_out.i_height = fmt_in.i_height * fmt_out.i_width
 501                      * fmt_in.i_sar_den / fmt_in.i_width / fmt_in.i_sar_num;
 502     }
 503     else if( fmt_out.i_width == 0 && fmt_out.i_height > 0 )
 504     {
 505         fmt_out.i_width  = fmt_in.i_width * fmt_out.i_height
 506                      * fmt_in.i_sar_num / fmt_in.i_height / fmt_in.i_sar_den;
 507     }
 508
 509     image_handler_t *p_image = image_HandlerCreate( p_obj );
 510
 511     block_t *p_block = image_Write( p_image, p_picture, &fmt_in, &fmt_out );
 512
 513     image_HandlerDelete( p_image );
 514
 515     if( !p_block )
 516         return VLC_EGENERIC;
 517
 518     p_block->i_pts =
 519     p_block->i_dts = p_picture->date;
 520
 521     if( p_fmt )
 522         *p_fmt = fmt_out;
 523     *pp_image = p_block;
 524
 525     return VLC_SUCCESS;
 526 }
 527