/***************************************************************************** * parse.c: SPU parser ***************************************************************************** * Copyright (C) 2000-2001, 2005, 2006 VLC authors and VideoLAN * $Id$ * * Authors: Sam Hocevar * Laurent Aimar * Gildas Bazin * * This program 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. * * 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include "spudec.h" /***************************************************************************** * Local prototypes. *****************************************************************************/ typedef struct { int i_width; int i_height; int i_x; int i_y; vlc_tick_t i_start; vlc_tick_t i_stop; bool b_ephemer; bool b_subtitle; } spu_properties_t; typedef struct { int pi_offset[2]; /* byte offsets to data */ /* Color information */ bool b_palette; uint8_t pi_alpha[4]; uint8_t pi_yuv[4][3]; /* PXCTLI commands storage */ const uint8_t *p_pxctli; size_t i_pxclti; /* Auto crop fullscreen subtitles */ bool b_auto_crop; int i_y_top_offset; int i_y_bottom_offset; } subpicture_data_t; static int ParseControlSeq( decoder_t *, vlc_tick_t i_pts, int(*pf_queue)(decoder_t *, subpicture_t *) ); static int ParseRLE ( decoder_t *, subpicture_data_t *, const spu_properties_t *, uint16_t *, size_t * ); static int Render ( decoder_t *, subpicture_t *, const uint16_t *, size_t, const subpicture_data_t *, const spu_properties_t * ); /***************************************************************************** * AddNibble: read a nibble from a source packet and add it to our integer. *****************************************************************************/ static inline unsigned int AddNibble( unsigned int i_code, const uint8_t *p_src, unsigned int *pi_index ) { if( *pi_index & 0x1 ) { return( i_code << 4 | ( p_src[(*pi_index)++ >> 1] & 0xf ) ); } else { return( i_code << 4 | p_src[(*pi_index)++ >> 1] >> 4 ); } } static void CLUTIdxToYUV(const struct subs_format_t *subs, const uint8_t idx[4], uint8_t yuv[4][3]) { for( int i = 0; i < 4 ; i++ ) { uint32_t i_ayvu = subs->spu.palette[1+idx[i]]; /* FIXME: this job should be done sooner */ yuv[3-i][0] = i_ayvu>>16; yuv[3-i][1] = i_ayvu; yuv[3-i][2] = i_ayvu>>8; } } static void ParsePXCTLI( decoder_t *p_dec, const subpicture_data_t *p_spu_data, subpicture_t *p_spu ) { if (p_spu->p_region == NULL) return; plane_t *p_plane = &p_spu->p_region->p_picture->p[0]; video_palette_t *p_palette = p_spu->p_region->fmt.p_palette; for( size_t i=0;ii_pxclti; i++ ) { uint16_t i_col = GetWBE(&p_spu_data->p_pxctli[i*6 + 0]); uint16_t i_color = GetWBE(&p_spu_data->p_pxctli[i*6 + 2]); uint16_t i_contrast = GetWBE(&p_spu_data->p_pxctli[i*6 + 4]); if(p_palette->i_entries +4 >= VIDEO_PALETTE_COLORS_MAX) break; if( p_dec->fmt_in.subs.spu.palette[0] == SPU_PALETTE_DEFINED ) { /* Lookup the CLUT palette for the YUV values */ uint8_t idx[4]; uint8_t yuv[4][3]; uint8_t alpha[4]; idx[0] = (i_color >> 12)&0x0f; idx[1] = (i_color >> 8)&0x0f; idx[2] = (i_color >> 4)&0x0f; idx[3] = i_color&0x0f; CLUTIdxToYUV( &p_dec->fmt_in.subs, idx, yuv ); /* Process the contrast */ alpha[3] = (i_contrast >> 12)&0x0f; alpha[2] = (i_contrast >> 8)&0x0f; alpha[1] = (i_contrast >> 4)&0x0f; alpha[0] = i_contrast&0x0f; /* Create a new YUVA palette entries for the picture */ int index_map[4]; for( int j=0; j<4; j++ ) { uint8_t yuvaentry[4]; yuvaentry[0] = yuv[j][0]; yuvaentry[1] = yuv[j][1]; yuvaentry[2] = yuv[j][2]; yuvaentry[3] = alpha[j] * 0x11; int i_index = VIDEO_PALETTE_COLORS_MAX; for( int k = p_palette->i_entries; k > 0; k-- ) { if( !memcmp( &p_palette->palette[k], yuvaentry, sizeof(uint8_t [4]) ) ) { i_index = VIDEO_PALETTE_COLORS_MAX; break; } } /* Add an entry in out palette */ if( i_index == VIDEO_PALETTE_COLORS_MAX ) { if(p_palette->i_entries == VIDEO_PALETTE_COLORS_MAX) { msg_Warn( p_dec, "Cannot create new color, skipping PXCTLI" ); return; } i_index = p_palette->i_entries++; memcpy( p_palette->palette[ i_index ], yuvaentry, sizeof(uint8_t [4]) ); } index_map[j] = i_index; } if( p_spu->p_region->i_x >= i_col ) i_col -= p_spu->p_region->i_x; for( int j=0; ji_visible_lines; j++ ) { uint8_t *p_line = &p_plane->p_pixels[j * p_plane->i_pitch]; /* Extends to end of the line */ for( int k=i_col; ki_visible_pitch; k++ ) { if( p_line[k] < 4 ) /* can forge write-again */ p_line[k] = index_map[ p_line[k] ]; } } } } } /***************************************************************************** * OutputPicture: ***************************************************************************** *****************************************************************************/ static void OutputPicture( decoder_t *p_dec, const subpicture_data_t *p_spu_data, const spu_properties_t *p_spu_properties, int(*pf_queue)(decoder_t *, subpicture_t *) ) { decoder_sys_t *p_sys = p_dec->p_sys; subpicture_t *p_spu; uint16_t *p_pixeldata; /* Allocate the subpicture internal data. */ p_spu = decoder_NewSubpicture( p_dec, NULL ); if( !p_spu ) return; p_spu->i_original_picture_width = p_dec->fmt_in.subs.spu.i_original_frame_width; p_spu->i_original_picture_height = p_dec->fmt_in.subs.spu.i_original_frame_height; p_spu->i_start = p_spu_properties->i_start; p_spu->i_stop = p_spu_properties->i_stop; p_spu->b_ephemer = p_spu_properties->b_ephemer; p_spu->b_subtitle = p_spu_properties->b_subtitle; if( p_spu->i_stop <= p_spu->i_start && !p_spu->b_ephemer ) { /* This subtitle will live for 5 seconds or until the next subtitle */ p_spu->i_stop = p_spu->i_start + (vlc_tick_t)500 * 11000; p_spu->b_ephemer = true; } /* we are going to expand the RLE stuff so that we won't need to read * nibbles later on. This will speed things up a lot. Plus, we'll only * need to do this stupid interlacing stuff once. * * Rationale for the "p_spudec->i_rle_size * 4*sizeof(*spu_data.p_data)": * one byte gaves two nibbles and may be used twice (once per field) * generating 4 codes. */ p_pixeldata = vlc_alloc( p_sys->i_rle_size, sizeof(*p_pixeldata) * 2 * 2 ); size_t pixeldata_size = p_sys->i_rle_size * 2 * 2; // in 16-bit /* We try to display it */ subpicture_data_t render_spu_data = *p_spu_data; /* Need a copy */ if( ParseRLE( p_dec, &render_spu_data, p_spu_properties, p_pixeldata, &pixeldata_size ) ) { /* There was a parse error, delete the subpicture */ subpicture_Delete( p_spu ); free( p_pixeldata ); return; } #ifdef DEBUG_SPUDEC msg_Dbg( p_dec, "total size: 0x%x, RLE offsets: 0x%x 0x%x", p_sys->i_spu_size, render_spu_data.pi_offset[0], render_spu_data.pi_offset[1] ); #endif if( Render( p_dec, p_spu, p_pixeldata, pixeldata_size, &render_spu_data, p_spu_properties ) ) { subpicture_Delete( p_spu ); free( p_pixeldata ); return; } free( p_pixeldata ); if( p_spu_data->p_pxctli && p_spu ) ParsePXCTLI( p_dec, p_spu_data, p_spu ); pf_queue( p_dec, p_spu ); } static int Validate( decoder_t *p_dec, unsigned i_index, unsigned i_cur_seq, unsigned i_next_seq, const subpicture_data_t *p_spu_data, const spu_properties_t *p_spu_properties ) { decoder_sys_t *p_sys = p_dec->p_sys; /* Check that the next sequence index matches the current one */ if( i_next_seq < i_cur_seq ) { msg_Err( p_dec, "index mismatch (0x%.4x < 0x%.4x)", i_next_seq, i_cur_seq ); return VLC_EGENERIC; } if( i_index > p_sys->i_spu_size ) { msg_Err( p_dec, "uh-oh, we went too far (0x%.4x > 0x%.4x)", i_index, p_sys->i_spu_size ); return VLC_EGENERIC; } const int i_spu_size = p_sys->i_spu - 4; if( p_spu_data->pi_offset[0] < 0 || p_spu_data->pi_offset[0] >= i_spu_size || p_spu_data->pi_offset[1] < 0 || p_spu_data->pi_offset[1] >= i_spu_size ) { msg_Err( p_dec, "invalid offset values" ); return VLC_EGENERIC; } if( p_spu_properties->i_start == VLC_TICK_INVALID ) { msg_Err( p_dec, "no `start display' command" ); return VLC_EGENERIC; } /* Get rid of padding bytes */ if( i_index > i_next_seq && p_sys->i_spu_size > i_index + 1 ) { /* Zero or one padding byte are quite usual * More than one padding byte - this is very strange, but * we can ignore them. */ msg_Warn( p_dec, "%i padding bytes, we usually get 0 or 1 of them", p_sys->i_spu_size - i_index ); } return VLC_SUCCESS; } /***************************************************************************** * ParsePacket: parse an SPU packet and send it to the video output ***************************************************************************** * This function parses the SPU packet and, if valid, sends it to the * video output. *****************************************************************************/ void ParsePacket( decoder_t *p_dec, int(*pf_queue)(decoder_t *, subpicture_t *) ) { decoder_sys_t *p_sys = p_dec->p_sys; /* Getting the control part */ if( ParseControlSeq( p_dec, p_sys->i_pts, pf_queue ) ) return; } /***************************************************************************** * ParseControlSeq: parse all SPU control sequences ***************************************************************************** * This is the most important part in SPU decoding. We get dates, palette * information, coordinates, and so on. For more information on the * subtitles format, see http://sam.zoy.org/doc/dvd/subtitles/index.html *****************************************************************************/ static int ParseControlSeq( decoder_t *p_dec, vlc_tick_t i_pts, int(*pf_queue)(decoder_t *, subpicture_t *) ) { decoder_sys_t *p_sys = p_dec->p_sys; /* Our current index in the SPU packet */ unsigned int i_index; /* The next start-of-control-sequence index and the previous one */ unsigned int i_next_seq = 0, i_cur_seq = 0; /* Command and date */ uint8_t i_command = SPU_CMD_END; vlc_tick_t date = 0; bool b_cmd_offset = false; bool b_cmd_alpha = false; /* Create working space for spu data */ subpicture_data_t spu_data_cmd; memset( &spu_data_cmd, 0, sizeof(spu_data_cmd) ); spu_data_cmd.pi_offset[0] = -1; spu_data_cmd.pi_offset[1] = -1; spu_data_cmd.b_palette = false; spu_data_cmd.b_auto_crop = false; spu_data_cmd.i_y_top_offset = 0; spu_data_cmd.i_y_bottom_offset = 0; spu_data_cmd.pi_alpha[0] = 0x00; spu_data_cmd.pi_alpha[1] = 0x0f; spu_data_cmd.pi_alpha[2] = 0x0f; spu_data_cmd.pi_alpha[3] = 0x0f; subpicture_data_t spu_data = spu_data_cmd; /* Initialize the structure */ spu_properties_t spu_properties; memset( &spu_properties, 0, sizeof(spu_properties) ); spu_properties.i_start = VLC_TICK_INVALID; spu_properties.i_stop = VLC_TICK_INVALID; spu_properties.b_subtitle = true; for( i_index = 4 + p_sys->i_rle_size; i_index < p_sys->i_spu_size ; ) { /* If we just read a command sequence, read the next one; * otherwise, go on with the commands of the current sequence. */ if( i_command == SPU_CMD_END ) { if( i_index + 4 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command sequence" ); return VLC_EGENERIC; } /* */ b_cmd_offset = false; b_cmd_alpha = false; /* Get the control sequence date */ date = VLC_TICK_FROM_MS(GetWBE( &p_sys->buffer[i_index] ) * 11); /* Next offset */ i_cur_seq = i_index; i_next_seq = GetWBE( &p_sys->buffer[i_index+2] ); if( i_next_seq > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU next command sequence" ); return VLC_EGENERIC; } /* Skip what we just read */ i_index += 4; } i_command = p_sys->buffer[i_index]; switch( i_command ) { case SPU_CMD_FORCE_DISPLAY: /* 00 (force displaying) */ spu_properties.i_start = i_pts + date; spu_properties.b_ephemer = true; /* ignores picture date as display start time * works around non displayable (offset by few ms) * spu menu over still frame in SPU_Select */ spu_properties.b_subtitle = false; i_index += 1; break; /* Convert the dates in seconds to PTS values */ case SPU_CMD_START_DISPLAY: /* 01 (start displaying) */ spu_properties.i_start = i_pts + date; i_index += 1; break; case SPU_CMD_STOP_DISPLAY: /* 02 (stop displaying) */ spu_properties.i_stop = i_pts + date; i_index += 1; break; case SPU_CMD_SET_PALETTE: /* 03xxxx (palette) */ if( i_index + 3 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command" ); return VLC_EGENERIC; } if( p_dec->fmt_in.subs.spu.palette[0] == SPU_PALETTE_DEFINED ) { uint8_t idx[4]; spu_data_cmd.b_palette = true; idx[0] = (p_sys->buffer[i_index+1]>>4)&0x0f; idx[1] = (p_sys->buffer[i_index+1])&0x0f; idx[2] = (p_sys->buffer[i_index+2]>>4)&0x0f; idx[3] = (p_sys->buffer[i_index+2])&0x0f; CLUTIdxToYUV( &p_dec->fmt_in.subs, idx, spu_data_cmd.pi_yuv ); } i_index += 3; break; case SPU_CMD_SET_ALPHACHANNEL: /* 04xxxx (alpha channel) */ if( i_index + 3 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command" ); return VLC_EGENERIC; } if(!p_sys->b_disabletrans) { /* If we want to use original transparency values */ b_cmd_alpha = true; spu_data_cmd.pi_alpha[3] = (p_sys->buffer[i_index+1]>>4)&0x0f; spu_data_cmd.pi_alpha[2] = (p_sys->buffer[i_index+1])&0x0f; spu_data_cmd.pi_alpha[1] = (p_sys->buffer[i_index+2]>>4)&0x0f; spu_data_cmd.pi_alpha[0] = (p_sys->buffer[i_index+2])&0x0f; } i_index += 3; break; case SPU_CMD_SET_COORDINATES: /* 05xxxyyyxxxyyy (coordinates) */ if( i_index + 7 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command" ); return VLC_EGENERIC; } spu_properties.i_x = (p_sys->buffer[i_index+1]<<4)| ((p_sys->buffer[i_index+2]>>4)&0x0f); spu_properties.i_width = (((p_sys->buffer[i_index+2]&0x0f)<<8)| p_sys->buffer[i_index+3]) - spu_properties.i_x + 1; spu_properties.i_y = (p_sys->buffer[i_index+4]<<4)| ((p_sys->buffer[i_index+5]>>4)&0x0f); spu_properties.i_height = (((p_sys->buffer[i_index+5]&0x0f)<<8)| p_sys->buffer[i_index+6]) - spu_properties.i_y + 1; if (spu_properties.i_width < 0 || spu_properties.i_height < 0) { msg_Err( p_dec, "integer overflow in SPU command" ); return VLC_EGENERIC; } /* Auto crop fullscreen subtitles */ if( spu_properties.i_height > 250 ) spu_data.b_auto_crop = true; i_index += 7; break; case SPU_CMD_SET_OFFSETS: /* 06xxxxyyyy (byte offsets) */ if( i_index + 5 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command" ); return VLC_EGENERIC; } b_cmd_offset = true; spu_data.pi_offset[0] = GetWBE(&p_sys->buffer[i_index+1]) - 4; spu_data.pi_offset[1] = GetWBE(&p_sys->buffer[i_index+3]) - 4; i_index += 5; break; case SPU_CMD_SET_COLCON: if( i_index + 7 > p_sys->i_spu_size ) { msg_Err( p_dec, "overflow in SPU command" ); return VLC_EGENERIC; } spu_properties.i_start = i_pts + date; if( p_sys->i_spu_size > i_index + 3 + 4 + (p_sys->buffer[i_index+5] >> 4) ) { spu_data.p_pxctli = &p_sys->buffer[i_index+3 + 4]; spu_data.i_pxclti = p_sys->buffer[i_index+5] >> 4; } i_index += 1 + GetWBE(&p_sys->buffer[i_index+1]); break; case SPU_CMD_END: /* ff (end) */ if( b_cmd_offset ) { /* It seems that palette and alpha from the block having * the cmd offset have to be used * XXX is it all ? */ spu_data.b_palette = spu_data_cmd.b_palette; if( spu_data_cmd.b_palette ) memcpy( spu_data.pi_yuv, spu_data_cmd.pi_yuv, sizeof(spu_data_cmd.pi_yuv) ); if( b_cmd_alpha ) memcpy( spu_data.pi_alpha, spu_data_cmd.pi_alpha, sizeof(spu_data_cmd.pi_alpha) ); } i_index += 1; if( Validate( p_dec, i_index, i_cur_seq, i_next_seq, &spu_data, &spu_properties ) == VLC_SUCCESS ) OutputPicture( p_dec, &spu_data, &spu_properties, pf_queue ); break; default: /* xx (unknown command) */ msg_Warn( p_dec, "unknown SPU command 0x%.2x", i_command ); if( i_index + 1 < i_next_seq ) { /* There is at least one other command sequence */ if( p_sys->buffer[i_next_seq - 1] == SPU_CMD_END ) { /* This is consistent. Skip to that command sequence. */ i_index = i_next_seq; } else { /* There were other commands. */ msg_Warn( p_dec, "cannot recover, dropping subtitle" ); return VLC_EGENERIC; } } else { /* We were in the last command sequence. Stop parsing by * pretending we met an SPU_CMD_END command. */ i_command = SPU_CMD_END; i_index++; } } /* */ if( i_command == SPU_CMD_END && i_index != i_next_seq ) break; } /* Successfully parsed ! */ return VLC_SUCCESS; } /***************************************************************************** * ParseRLE: parse the RLE part of the subtitle ***************************************************************************** * This part parses the subtitle graphical data and stores it in a more * convenient structure for later decoding. For more information on the * subtitles format, see http://sam.zoy.org/doc/dvd/subtitles/index.html *****************************************************************************/ static int ParseRLE( decoder_t *p_dec, subpicture_data_t *p_spu_data, const spu_properties_t *p_spu_properties, uint16_t *p_pixeldata, size_t * pixeldata_size ) { decoder_sys_t *p_sys = p_dec->p_sys; const unsigned int i_width = p_spu_properties->i_width; const unsigned int i_height = p_spu_properties->i_height; unsigned int i_x, i_y; uint16_t *p_dest = p_pixeldata; size_t dest_left = *pixeldata_size; #define WRITE_CODE(x) \ if (dest_left == 0) \ break; \ do { \ *p_dest++ = (x); \ dest_left--; \ } while(0) /* The subtitles are interlaced, we need two offsets */ unsigned int i_id = 0; /* Start on the even SPU layer */ unsigned int pi_table[ 2 ]; unsigned int *pi_offset; /* Cropping */ bool b_empty_top = true; unsigned int i_skipped_top = 0, i_skipped_bottom = 0; unsigned int i_transparent_code = 0; /* Colormap statistics */ int i_border = -1; int stats[4]; stats[0] = stats[1] = stats[2] = stats[3] = 0; pi_table[ 0 ] = p_spu_data->pi_offset[ 0 ] << 1; pi_table[ 1 ] = p_spu_data->pi_offset[ 1 ] << 1; for( i_y = 0 ; i_y < i_height && dest_left != 0 ; i_y++ ) { unsigned int i_code; pi_offset = pi_table + i_id; for( i_x = 0 ; i_x < i_width && dest_left != 0 ; i_x += i_code >> 2 ) { i_code = 0; for( unsigned int i_min = 1; i_min <= 0x40 && i_code < i_min; i_min <<= 2 ) { if( (*pi_offset >> 1) + 4 >= p_sys->i_spu_size ) { msg_Err( p_dec, "out of bounds while reading rle" ); return VLC_EGENERIC; } i_code = AddNibble( i_code, &p_sys->buffer[4], pi_offset ); } if( i_code < 0x0004 ) { /* If the 14 first bits are set to 0, then it's a * new line. We emulate it. */ i_code |= ( i_width - i_x ) << 2; } if( ( (i_code >> 2) + i_x + i_y * i_width ) > i_height * i_width ) { msg_Err( p_dec, "out of bounds, %i at (%i,%i) is out of %ix%i", i_code >> 2, i_x, i_y, i_width, i_height ); return VLC_EGENERIC; } /* Try to find the border color */ if( p_spu_data->pi_alpha[ i_code & 0x3 ] != 0x00 ) { i_border = i_code & 0x3; stats[i_border] += i_code >> 2; } /* Auto crop subtitles (a lot more optimized) */ if( p_spu_data->b_auto_crop ) { if( !i_y ) { /* We assume that if the first line is transparent, then * it is using the palette index for the * (background) transparent color */ if( (i_code >> 2) == i_width && p_spu_data->pi_alpha[ i_code & 0x3 ] == 0x00 ) { i_transparent_code = i_code; } else { p_spu_data->b_auto_crop = false; } } if( i_code == i_transparent_code ) { if( b_empty_top ) { /* This is a blank top line, we skip it */ i_skipped_top++; } else { /* We can't be sure the current lines will be skipped, * so we store the code just in case. */ WRITE_CODE( i_code ); i_skipped_bottom++; } } else { /* We got a valid code, store it */ WRITE_CODE( i_code ); /* Valid code means no blank line */ b_empty_top = false; i_skipped_bottom = 0; } } else { WRITE_CODE( i_code ); } } /* Check that we didn't go too far */ if( i_x > i_width ) { msg_Err( p_dec, "i_x overflowed, %i > %i", i_x, i_width ); return VLC_EGENERIC; } /* Byte-align the stream */ if( *pi_offset & 0x1 ) { (*pi_offset)++; } /* Swap fields */ i_id = ~i_id & 0x1; } /* We shouldn't get any padding bytes */ if( i_y < i_height ) { msg_Err( p_dec, "padding bytes found in RLE sequence" ); msg_Err( p_dec, "send mail to if you " "want to help debugging this" ); /* Skip them just in case */ while( i_y < i_height ) { WRITE_CODE( i_width << 2 ); i_y++; } return VLC_EGENERIC; } #ifdef DEBUG_SPUDEC msg_Dbg( p_dec, "valid subtitle, size: %ix%i, position: %i,%i", p_spu_properties->i_width, p_spu_properties->i_height, p_spu_properties->i_x, p_spu_properties->i_y ); #endif /* Crop if necessary */ if( i_skipped_top || i_skipped_bottom ) { p_spu_data->i_y_top_offset = i_skipped_top; p_spu_data->i_y_bottom_offset = i_skipped_bottom; #ifdef DEBUG_SPUDEC msg_Dbg( p_dec, "cropped to: %ix%i, position: %i,%i", p_spu_properties->i_width, p_spu_properties->i_height - (i_skipped_top + i_skipped_bottom), p_spu_properties->i_x, p_spu_properties->i_y + i_skipped_top ); #endif } /* Handle color if no palette was found */ if( !p_spu_data->b_palette ) { int i, i_inner = -1, i_shade = -1; /* Set the border color */ if( i_border != -1 ) { p_spu_data->pi_yuv[i_border][0] = 0x00; p_spu_data->pi_yuv[i_border][1] = 0x80; p_spu_data->pi_yuv[i_border][2] = 0x80; stats[i_border] = 0; } /* Find the inner colors */ for( i = 0 ; i < 4 && i_inner == -1 ; i++ ) { if( stats[i] ) { i_inner = i; } } for( ; i < 4 && i_shade == -1 ; i++ ) { if( stats[i] ) { if( stats[i] > stats[i_inner] ) { i_shade = i_inner; i_inner = i; } else { i_shade = i; } } } /* Set the inner color */ if( i_inner != -1 ) { p_spu_data->pi_yuv[i_inner][0] = 0xff; p_spu_data->pi_yuv[i_inner][1] = 0x80; p_spu_data->pi_yuv[i_inner][2] = 0x80; } /* Set the anti-aliasing color */ if( i_shade != -1 ) { p_spu_data->pi_yuv[i_shade][0] = 0x80; p_spu_data->pi_yuv[i_shade][1] = 0x80; p_spu_data->pi_yuv[i_shade][2] = 0x80; } #ifdef DEBUG_SPUDEC msg_Dbg( p_dec, "using custom palette (border %i, inner %i, shade %i)", i_border, i_inner, i_shade ); #endif } *pixeldata_size = *pixeldata_size - dest_left; return VLC_SUCCESS; } static int Render( decoder_t *p_dec, subpicture_t *p_spu, const uint16_t *p_pixeldata, size_t pixeldata_size, const subpicture_data_t *p_spu_data, const spu_properties_t *p_spu_properties ) { uint8_t *p_p; int i_x, i_y, i_len, i_color, i_pitch; const uint16_t *p_source = p_pixeldata; size_t source_left = pixeldata_size; video_format_t fmt; video_palette_t palette; if (p_spu_properties->i_width <= 0) return VLC_SUCCESS; if (p_spu_properties->i_height <= (p_spu_data->i_y_top_offset + p_spu_data->i_y_bottom_offset)) return VLC_SUCCESS; /* Create a new subpicture region */ video_format_Init( &fmt, VLC_CODEC_YUVP ); fmt.i_sar_num = 0; /* 0 means use aspect ratio of background video */ fmt.i_sar_den = 1; fmt.i_width = fmt.i_visible_width = p_spu_properties->i_width; fmt.i_height = fmt.i_visible_height = p_spu_properties->i_height - p_spu_data->i_y_top_offset - p_spu_data->i_y_bottom_offset; fmt.i_x_offset = fmt.i_y_offset = 0; fmt.p_palette = &palette; fmt.p_palette->i_entries = 4; for( i_x = 0; i_x < fmt.p_palette->i_entries; i_x++ ) { fmt.p_palette->palette[i_x][0] = p_spu_data->pi_yuv[i_x][0]; fmt.p_palette->palette[i_x][1] = p_spu_data->pi_yuv[i_x][1]; fmt.p_palette->palette[i_x][2] = p_spu_data->pi_yuv[i_x][2]; fmt.p_palette->palette[i_x][3] = p_spu_data->pi_alpha[i_x] * 0x11; } fmt.b_color_range_full = false; p_spu->p_region = subpicture_region_New( &fmt ); if( !p_spu->p_region ) { fmt.p_palette = NULL; video_format_Clean( &fmt ); msg_Err( p_dec, "cannot allocate SPU region" ); return VLC_EGENERIC; } p_spu->p_region->i_x = p_spu_properties->i_x; p_spu->p_region->i_y = p_spu_properties->i_y + p_spu_data->i_y_top_offset; p_p = p_spu->p_region->p_picture->p->p_pixels; i_pitch = p_spu->p_region->p_picture->p->i_pitch; /* Draw until we reach the bottom of the subtitle */ for( i_y = 0; i_y < (int)fmt.i_height * i_pitch; i_y += i_pitch ) { /* Draw until we reach the end of the line */ for( i_x = 0 ; i_x < (int)fmt.i_width; i_x += i_len ) { if( source_left == 0 ) { msg_Err( p_dec, "missing RLE data" ); subpicture_region_Delete( p_spu->p_region ); p_spu->p_region = NULL; return VLC_EGENERIC; } /* Get the RLE part, then draw the line */ i_color = *p_source & 0x3; i_len = *p_source++ >> 2; source_left--; memset( p_p + i_x + i_y, i_color, i_len ); } } fmt.p_palette = NULL; video_format_Clean( &fmt ); return VLC_SUCCESS; }