subtitle.h
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上传日期:2009-03-27
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- /*****************************************************************************
- * subtitle.h : Common SVCD and CVD subtitles header
- *****************************************************************************
- * Copyright (C) 2003,2004 VideoLAN
- * $Id: subtitle.h 7991 2004-06-17 03:37:03Z yoann $
- *
- * Author: Rocky Bernstein
- * based on code from:
- * Julio Sanchez Fernandez (http://subhandler.sourceforge.net)
- * Sam Hocevar <sam@zoy.org>
- *
- * This program 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.
- *
- * This program 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include "pixmap.h"
- #define DECODE_DBG_EXT 1 /* Calls from external routines */
- #define DECODE_DBG_CALL 2 /* all calls */
- #define DECODE_DBG_PACKET 4 /* packet assembly info */
- #define DECODE_DBG_IMAGE 8 /* image bitmaps */
- #define DECODE_DBG_TRANSFORM 16 /* bitmap transformations */
- #define DECODE_DBG_RENDER 32 /* rendering information */
- #define DECODE_DBG_PNG 64 /* Extract subtitles to PNG files. */
- #define DECODE_DBG_INFO 128
- #define DEBUG_TEXT N_(
- "If nonzero, this gives additional debug information."
- )
- #define DEBUG_LONGTEXT N_(
- "This integer when viewed in binary is a debugging maskn"
- "external call 1n"
- "all calls 2n"
- "packet assembly info 4n"
- "image bitmaps 8n"
- "image transformations 16n"
- "rendering information 32n"
- "extract subtitles 64n"
- "misc info 128n" )
- #define SUB_ASPECT_RATIO_TEXT N_("Subtitle aspect-ratio correction")
- #define SUB_ASPECT_RATIO_LONGTEXT N_(
- "Use this to force the subtitle aspect ratio. If you give a null string "
- "the right value will be determined automatically. Usually this is what "
- "you want. For OGT and CVD subtitles this undoes the effect "
- "of the underlying video scaling. And using a value of 1 will cause "
- "no correction; subtitles will be scaled with the same aspect "
- "ratio as as the underlying video (which not correct for OGT or "
- "CVD subtitles). You can also force another ratio by giving a pair of "
- "integers x:y where y should between x and twice x. For example 4:3, or "
- "16:9. Alternatively, you can give a float value expressing pixel "
- "squareness. For example 1.25 or 1.3333 which mean the same thing as "
- "4:3 and 16:9 respectively."
- )
- #define DURATION_SCALE_TEXT N_("Factor to increase subtitle display interval")
- #define DURATION_SCALE_LONGTEXT N_(
- "If you find you need extra time for reading subtitles, "
- "you can set this higher and it will multiply the display "
- "time by that amount. Use 0 to mean until the next "
- "subtitle.")
- #define HORIZONTAL_CORRECT
- N_("Add this to starting horizontal position of subtitle.")
- #define HORIZONTAL_CORRECT_LONGTEXT N_(
- "If you need to adjust the subtitle starting position horizontally, "
- "set this. Negative values shift left and positive values right. 0 would "
- "be no deviation from where the position specified in the subtitle."
- )
- #define VERTICAL_CORRECT
- N_("Add this to starting vertical position of subtitle.")
- #define VERTICAL_CORRECT_LONGTEXT N_(
- "If you need to adjust the subtitle starting position vertically, "
- "set this. Negative values shift up, positive values down. 0 would "
- "be no deviation from where the position specified in the subtitle."
- )
- #define DECODE_DEBUG 1
- #if DECODE_DEBUG
- #define dbg_print(mask, s, args...)
- if (p_sys && p_sys->i_debug & mask)
- msg_Dbg(p_dec, "%s: "s, __func__ , ##args)
- #else
- #define dbg_print(mask, s, args...)
- #endif
- #define LOG_ERR(args...) msg_Err( p_input, args )
- #define LOG_WARN(args...) msg_Warn( p_input, args )
- #define GETINT16(p) ( (p[0] << 8) + p[1] ) ; p +=2;
- #define GETINT32(p) ( (p[0] << 24) + (p[1] << 16) +
- (p[2] << 8) + (p[3]) ) ; p += 4;
- /* The number of color palette entries allowed in a subtitle. */
- #define NUM_SUBTITLE_COLORS 4
- typedef enum {
- SUBTITLE_BLOCK_EMPTY,
- SUBTITLE_BLOCK_PARTIAL,
- SUBTITLE_BLOCK_COMPLETE
- } packet_state_t;
- /* The byte storage used by one pixel */
- #define PIXEL_SIZE 4
- /* Size in bytes of YUV portion above. */
- #define YUV_SIZE 3
- /* Transparency plane. NOTE: see vlc_video.h for V_PLANE */
- #define T_PLANE V_PLANE+1
- struct decoder_sys_t
- {
- int i_debug; /* debugging mask */
- mtime_t i_pts; /* Start PTS of subtitle block */
- int i_spu;
- packet_state_t state; /* data-gathering state for this subtitle */
- uint16_t i_image; /* image number in the subtitle stream; 0 is the
- first one. */
- uint8_t i_packet;/* packet number for above image number; 0 is the
- first one. */
- block_t *p_block;/* Bytes of the packet. */
- uint8_t buffer[65536 + 20 ]; /* we will never overflow more than 11
- bytes if I'm right */
- int b_packetizer;
- int i_spu_size; /* goal for subtitle_data_pos while gathering,
- size of used subtitle_data later */
- vout_thread_t *p_vout;
- int i_subpic_channel; /* Subpicture channel in which subtitles will
- be written */
- /* FIXME: Remove this? */
- uint8_t *subtitle_data; /* buffer used to accumulate data from
- successive packets in the same subtitle */
- int subtitle_data_size; /* size of the allocated subtitle_data */
- /* Move into subpicture_sys_t? */
- uint16_t i_image_offset; /* offset from subtitle_data to compressed
- image data */
- int i_image_length; /* size of the compressed image data */
- int first_field_offset; /* offset of even raster lines. Used
- only for CVD. */
- int second_field_offset; /* offset of odd raster lines */
- int metadata_offset; /* offset to data describing the image */
- int metadata_length; /* length of metadata */
- int subtitle_data_pos; /* where to write next chunk */
- mtime_t i_duration; /* how long to display the image, 0 stands
- for "until next subtitle" */
- uint16_t i_x_start, i_y_start; /* position of top leftmost pixel of
- image when displayed */
- uint16_t i_width, i_height; /* dimensions in pixels of image */
- ogt_yuvt_t p_palette[NUM_SUBTITLE_COLORS]; /* Palette of colors used
- in subtitle */
- ogt_yuvt_t p_palette_highlight[NUM_SUBTITLE_COLORS]; /* Only used
- for CVD */
- uint8_t i_options;
- uint8_t i_options2;
- uint8_t i_cmd;
- uint32_t i_cmd_arg;
- };
- struct subpicture_sys_t
- {
- int i_debug; /* debugging mask */
- mtime_t i_pts; /* presentation timestamp */
- uint8_t *p_data; /* Image data one byte T, Y, U, V */
- /* Link to our input */
- vlc_object_t * p_input;
- /* Cropping properties */
- vlc_mutex_t lock;
- vlc_bool_t b_crop;
- unsigned int i_x_start, i_y_start, i_x_end, i_y_end;
- /* This is only used for color palette Chromas like RGB2. */
- ogt_yuvt_t p_palette[NUM_SUBTITLE_COLORS]; /* Palette of colors used
- in subtitle */
- };