1 /*****************************************************************************
2 * theora.c: theora decoder module making use of libtheora.
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_plugin.h>
33 #include <vlc_codec.h>
35 #include <vlc_input.h>
38 #include <theora/theora.h>
40 /*****************************************************************************
41 * decoder_sys_t : theora decoder descriptor
42 *****************************************************************************/
56 theora_info ti; /* theora bitstream settings */
57 theora_comment tc; /* theora comment header */
58 theora_state td; /* theora bitstream user comments */
63 bool b_decoded_first_keyframe;
71 /*****************************************************************************
73 *****************************************************************************/
74 static int OpenDecoder ( vlc_object_t * );
75 static int OpenPacketizer( vlc_object_t * );
76 static void CloseDecoder ( vlc_object_t * );
78 static void *DecodeBlock ( decoder_t *, block_t ** );
79 static int ProcessHeaders( decoder_t * );
80 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
82 static picture_t *DecodePacket( decoder_t *, ogg_packet * );
84 static void ParseTheoraComments( decoder_t * );
85 static void theora_CopyPicture( picture_t *, yuv_buffer * );
87 static int OpenEncoder( vlc_object_t *p_this );
88 static void CloseEncoder( vlc_object_t *p_this );
89 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
91 /*****************************************************************************
93 *****************************************************************************/
94 #define ENC_QUALITY_TEXT N_("Encoding quality")
95 #define ENC_QUALITY_LONGTEXT N_( \
96 "Enforce a quality between 1 (low) and 10 (high), instead " \
97 "of specifying a particular bitrate. This will produce a VBR stream." )
100 set_category( CAT_INPUT )
101 set_subcategory( SUBCAT_INPUT_VCODEC )
102 set_shortname( "Theora" )
103 set_description( N_("Theora video decoder") )
104 set_capability( "decoder", 100 )
105 set_callbacks( OpenDecoder, CloseDecoder )
106 add_shortcut( "theora" )
109 set_description( N_("Theora video packetizer") )
110 set_capability( "packetizer", 100 )
111 set_callbacks( OpenPacketizer, CloseDecoder )
112 add_shortcut( "theora" )
115 set_description( N_("Theora video encoder") )
116 set_capability( "encoder", 150 )
117 set_callbacks( OpenEncoder, CloseEncoder )
118 add_shortcut( "theora" )
120 # define ENC_CFG_PREFIX "sout-theora-"
121 add_integer( ENC_CFG_PREFIX "quality", 2, NULL, ENC_QUALITY_TEXT,
122 ENC_QUALITY_LONGTEXT, false )
125 static const char *const ppsz_enc_options[] = {
129 /*****************************************************************************
130 * OpenDecoder: probe the decoder and return score
131 *****************************************************************************/
132 static int OpenDecoder( vlc_object_t *p_this )
134 decoder_t *p_dec = (decoder_t*)p_this;
135 decoder_sys_t *p_sys;
137 if( p_dec->fmt_in.i_codec != VLC_CODEC_THEORA )
142 /* Allocate the memory needed to store the decoder's structure */
143 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
145 p_dec->p_sys->b_packetizer = false;
147 p_sys->i_pts = VLC_TS_INVALID;
148 p_sys->b_decoded_first_keyframe = false;
150 /* Set output properties */
151 p_dec->fmt_out.i_cat = VIDEO_ES;
152 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
155 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
157 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
160 /* Init supporting Theora structures needed in header parsing */
161 theora_comment_init( &p_sys->tc );
162 theora_info_init( &p_sys->ti );
164 p_sys->i_headers = 0;
169 static int OpenPacketizer( vlc_object_t *p_this )
171 decoder_t *p_dec = (decoder_t*)p_this;
173 int i_ret = OpenDecoder( p_this );
175 if( i_ret == VLC_SUCCESS )
177 p_dec->p_sys->b_packetizer = true;
178 p_dec->fmt_out.i_codec = VLC_CODEC_THEORA;
184 /****************************************************************************
185 * DecodeBlock: the whole thing
186 ****************************************************************************
187 * This function must be fed with ogg packets.
188 ****************************************************************************/
189 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
191 decoder_sys_t *p_sys = p_dec->p_sys;
193 ogg_packet oggpacket;
195 if( !pp_block || !*pp_block ) return NULL;
199 /* Block to Ogg packet */
200 oggpacket.packet = p_block->p_buffer;
201 oggpacket.bytes = p_block->i_buffer;
202 oggpacket.granulepos = p_block->i_dts;
205 oggpacket.packetno = 0;
207 /* Check for headers */
208 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
210 /* Headers already available as extra data */
211 p_sys->i_headers = 3;
213 else if( oggpacket.bytes && p_sys->i_headers < 3 )
215 /* Backup headers as extra data */
218 p_dec->fmt_in.p_extra = xrealloc( p_dec->fmt_in.p_extra,
219 p_dec->fmt_in.i_extra + oggpacket.bytes + 2 );
220 p_extra = ((uint8_t *)p_dec->fmt_in.p_extra) + p_dec->fmt_in.i_extra;
221 *(p_extra++) = oggpacket.bytes >> 8;
222 *(p_extra++) = oggpacket.bytes & 0xFF;
224 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
225 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
227 block_Release( *pp_block );
232 if( p_sys->i_headers == 3 )
234 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
236 p_sys->i_headers = 0;
237 p_dec->fmt_in.i_extra = 0;
238 block_Release( *pp_block );
241 else p_sys->i_headers++;
244 return ProcessPacket( p_dec, &oggpacket, pp_block );
247 /*****************************************************************************
248 * ProcessHeaders: process Theora headers.
249 *****************************************************************************/
250 static int ProcessHeaders( decoder_t *p_dec )
252 decoder_sys_t *p_sys = p_dec->p_sys;
253 ogg_packet oggpacket;
257 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
259 oggpacket.granulepos = -1;
260 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
262 oggpacket.packetno = 0;
263 p_extra = p_dec->fmt_in.p_extra;
264 i_extra = p_dec->fmt_in.i_extra;
266 /* Take care of the initial Vorbis header */
267 oggpacket.bytes = *(p_extra++) << 8;
268 oggpacket.bytes |= (*(p_extra++) & 0xFF);
269 oggpacket.packet = p_extra;
270 p_extra += oggpacket.bytes;
271 i_extra -= (oggpacket.bytes + 2);
274 msg_Err( p_dec, "header data corrupted");
278 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
280 msg_Err( p_dec, "this bitstream does not contain Theora video data" );
284 /* Set output properties */
285 switch( p_sys->ti.pixelformat )
288 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
291 p_dec->fmt_out.i_codec = VLC_CODEC_I422;
294 p_dec->fmt_out.i_codec = VLC_CODEC_I444;
298 msg_Err( p_dec, "unknown chroma in theora sample" );
301 p_dec->fmt_out.video.i_width = p_sys->ti.width;
302 p_dec->fmt_out.video.i_height = p_sys->ti.height;
303 if( p_sys->ti.frame_width && p_sys->ti.frame_height )
305 p_dec->fmt_out.video.i_visible_width = p_sys->ti.frame_width;
306 p_dec->fmt_out.video.i_visible_height = p_sys->ti.frame_height;
307 if( p_sys->ti.offset_x || p_sys->ti.offset_y )
309 p_dec->fmt_out.video.i_x_offset = p_sys->ti.offset_x;
310 p_dec->fmt_out.video.i_y_offset = p_sys->ti.offset_y;
314 if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
316 p_dec->fmt_out.video.i_sar_num = p_sys->ti.aspect_numerator;
317 p_dec->fmt_out.video.i_sar_den = p_sys->ti.aspect_denominator;
321 p_dec->fmt_out.video.i_sar_num = 1;
322 p_dec->fmt_out.video.i_sar_den = 1;
325 if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
327 p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
328 p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
331 msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
332 "is %dx%d with offset (%d,%d)",
333 p_sys->ti.width, p_sys->ti.height,
334 (double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
335 p_sys->ti.frame_width, p_sys->ti.frame_height,
336 p_sys->ti.offset_x, p_sys->ti.offset_y );
338 /* Sanity check that seems necessary for some corrupted files */
339 if( p_sys->ti.width < p_sys->ti.frame_width ||
340 p_sys->ti.height < p_sys->ti.frame_height )
342 msg_Warn( p_dec, "trying to correct invalid theora header "
343 "(frame size (%dx%d) is smaller than frame content (%d,%d))",
344 p_sys->ti.width, p_sys->ti.height,
345 p_sys->ti.frame_width, p_sys->ti.frame_height );
347 if( p_sys->ti.width < p_sys->ti.frame_width )
348 p_sys->ti.width = p_sys->ti.frame_width;
349 if( p_sys->ti.height < p_sys->ti.frame_height )
350 p_sys->ti.height = p_sys->ti.frame_height;
353 /* The next packet in order is the comments header */
355 oggpacket.bytes = *(p_extra++) << 8;
356 oggpacket.bytes |= (*(p_extra++) & 0xFF);
357 oggpacket.packet = p_extra;
358 p_extra += oggpacket.bytes;
359 i_extra -= (oggpacket.bytes + 2);
362 msg_Err( p_dec, "header data corrupted");
366 /* The next packet in order is the comments header */
367 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
369 msg_Err( p_dec, "2nd Theora header is corrupted" );
373 ParseTheoraComments( p_dec );
375 /* The next packet in order is the codebooks header
376 * We need to watch out that this packet is not missing as a
377 * missing or corrupted header is fatal. */
378 oggpacket.bytes = *(p_extra++) << 8;
379 oggpacket.bytes |= (*(p_extra++) & 0xFF);
380 oggpacket.packet = p_extra;
381 i_extra -= (oggpacket.bytes + 2);
384 msg_Err( p_dec, "header data corrupted");
388 /* The next packet in order is the codebooks header
389 * We need to watch out that this packet is not missing as a
390 * missing or corrupted header is fatal */
391 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
393 msg_Err( p_dec, "3rd Theora header is corrupted" );
397 if( !p_sys->b_packetizer )
399 /* We have all the headers, initialize decoder */
400 theora_decode_init( &p_sys->td, &p_sys->ti );
404 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
405 p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
406 p_dec->fmt_out.i_extra );
407 memcpy( p_dec->fmt_out.p_extra,
408 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
414 /*****************************************************************************
415 * ProcessPacket: processes a theora packet.
416 *****************************************************************************/
417 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
420 decoder_sys_t *p_sys = p_dec->p_sys;
421 block_t *p_block = *pp_block;
424 if( ( p_block->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) != 0 )
426 /* Don't send the the first packet after a discontinuity to
427 * theora_decode, otherwise we get purple/green display artifacts
428 * appearing in the video output */
432 /* Date management */
433 if( p_block->i_pts > VLC_TS_INVALID && p_block->i_pts != p_sys->i_pts )
435 p_sys->i_pts = p_block->i_pts;
438 *pp_block = NULL; /* To avoid being fed the same packet again */
440 if( p_sys->b_packetizer )
442 /* Date management */
443 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
445 if( p_sys->i_headers >= 3 )
446 p_block->i_length = p_sys->i_pts - p_block->i_pts;
448 p_block->i_length = 0;
454 if( p_sys->i_headers >= 3 )
455 p_buf = DecodePacket( p_dec, p_oggpacket );
459 if( p_block ) block_Release( p_block );
462 /* Date management */
463 p_sys->i_pts += ( INT64_C(1000000) * p_sys->ti.fps_denominator /
464 p_sys->ti.fps_numerator ); /* 1 frame per packet */
469 /*****************************************************************************
470 * DecodePacket: decodes a Theora packet.
471 *****************************************************************************/
472 static picture_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
474 decoder_sys_t *p_sys = p_dec->p_sys;
478 theora_decode_packetin( &p_sys->td, p_oggpacket );
480 /* Check for keyframe */
481 if( !(p_oggpacket->packet[0] & 0x80) /* data packet */ &&
482 !(p_oggpacket->packet[0] & 0x40) /* intra frame */ )
483 p_sys->b_decoded_first_keyframe = true;
485 /* If we haven't seen a single keyframe yet, don't let Theora decode
486 * anything, otherwise we'll get display artifacts. (This is impossible
487 * in the general case, but can happen if e.g. we play a network stream
488 * using a timed URL, such that the server doesn't start the video with a
490 if( p_sys->b_decoded_first_keyframe )
491 theora_decode_YUVout( &p_sys->td, &yuv );
495 /* Get a new picture */
496 p_pic = decoder_NewPicture( p_dec );
497 if( !p_pic ) return NULL;
499 theora_CopyPicture( p_pic, &yuv );
501 p_pic->date = p_sys->i_pts;
506 /*****************************************************************************
507 * ParseTheoraComments:
508 *****************************************************************************/
509 static void ParseTheoraComments( decoder_t *p_dec )
511 char *psz_name, *psz_value, *psz_comment;
514 while ( i < p_dec->p_sys->tc.comments )
516 psz_comment = strdup( p_dec->p_sys->tc.user_comments[i] );
519 psz_name = psz_comment;
520 psz_value = strchr( psz_comment, '=' );
526 if( !p_dec->p_description )
527 p_dec->p_description = vlc_meta_New();
528 if( p_dec->p_description )
529 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
536 /*****************************************************************************
537 * CloseDecoder: theora decoder destruction
538 *****************************************************************************/
539 static void CloseDecoder( vlc_object_t *p_this )
541 decoder_t *p_dec = (decoder_t *)p_this;
542 decoder_sys_t *p_sys = p_dec->p_sys;
544 theora_info_clear( &p_sys->ti );
545 theora_comment_clear( &p_sys->tc );
550 /*****************************************************************************
551 * theora_CopyPicture: copy a picture from theora internal buffers to a
552 * picture_t structure.
553 *****************************************************************************/
554 static void theora_CopyPicture( picture_t *p_pic,
557 int i_plane, i_line, i_dst_stride, i_src_stride;
558 uint8_t *p_dst, *p_src;
560 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
562 p_dst = p_pic->p[i_plane].p_pixels;
563 p_src = i_plane ? (i_plane - 1 ? yuv->v : yuv->u ) : yuv->y;
564 i_dst_stride = p_pic->p[i_plane].i_pitch;
565 i_src_stride = i_plane ? yuv->uv_stride : yuv->y_stride;
567 for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
569 vlc_memcpy( p_dst, p_src,
570 i_plane ? yuv->uv_width : yuv->y_width );
571 p_src += i_src_stride;
572 p_dst += i_dst_stride;
577 /*****************************************************************************
578 * encoder_sys_t : theora encoder descriptor
579 *****************************************************************************/
590 theora_info ti; /* theora bitstream settings */
591 theora_comment tc; /* theora comment header */
592 theora_state td; /* theora bitstream user comments */
594 int i_width, i_height;
597 /*****************************************************************************
598 * OpenEncoder: probe the encoder and return score
599 *****************************************************************************/
600 static int OpenEncoder( vlc_object_t *p_this )
602 encoder_t *p_enc = (encoder_t *)p_this;
603 encoder_sys_t *p_sys;
608 if( p_enc->fmt_out.i_codec != VLC_CODEC_THEORA &&
614 /* Allocate the memory needed to store the decoder's structure */
615 if( ( p_sys = malloc(sizeof(encoder_sys_t)) ) == NULL )
617 p_enc->p_sys = p_sys;
619 p_enc->pf_encode_video = Encode;
620 p_enc->fmt_in.i_codec = VLC_CODEC_I420;
621 p_enc->fmt_out.i_codec = VLC_CODEC_THEORA;
623 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
625 i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
626 if( i_quality > 10 ) i_quality = 10;
627 if( i_quality < 0 ) i_quality = 0;
629 theora_info_init( &p_sys->ti );
631 p_sys->ti.width = p_enc->fmt_in.video.i_width;
632 p_sys->ti.height = p_enc->fmt_in.video.i_height;
634 if( p_sys->ti.width % 16 || p_sys->ti.height % 16 )
636 /* Pictures from the transcoder should always have a pitch
637 * which is a multiple of 16 */
638 p_sys->ti.width = (p_sys->ti.width + 15) >> 4 << 4;
639 p_sys->ti.height = (p_sys->ti.height + 15) >> 4 << 4;
641 msg_Dbg( p_enc, "padding video from %dx%d to %dx%d",
642 p_enc->fmt_in.video.i_width, p_enc->fmt_in.video.i_height,
643 p_sys->ti.width, p_sys->ti.height );
646 p_sys->ti.frame_width = p_enc->fmt_in.video.i_width;
647 p_sys->ti.frame_height = p_enc->fmt_in.video.i_height;
648 p_sys->ti.offset_x = 0 /*frame_x_offset*/;
649 p_sys->ti.offset_y = 0 /*frame_y_offset*/;
651 p_sys->i_width = p_sys->ti.width;
652 p_sys->i_height = p_sys->ti.height;
654 if( !p_enc->fmt_in.video.i_frame_rate ||
655 !p_enc->fmt_in.video.i_frame_rate_base )
657 p_sys->ti.fps_numerator = 25;
658 p_sys->ti.fps_denominator = 1;
662 p_sys->ti.fps_numerator = p_enc->fmt_in.video.i_frame_rate;
663 p_sys->ti.fps_denominator = p_enc->fmt_in.video.i_frame_rate_base;
666 if( p_enc->fmt_in.video.i_sar_num > 0 && p_enc->fmt_in.video.i_sar_den > 0 )
668 unsigned i_dst_num, i_dst_den;
669 vlc_ureduce( &i_dst_num, &i_dst_den,
670 p_enc->fmt_in.video.i_sar_num,
671 p_enc->fmt_in.video.i_sar_den, 0 );
672 p_sys->ti.aspect_numerator = i_dst_num;
673 p_sys->ti.aspect_denominator = i_dst_den;
677 p_sys->ti.aspect_numerator = 4;
678 p_sys->ti.aspect_denominator = 3;
681 p_sys->ti.target_bitrate = p_enc->fmt_out.i_bitrate;
682 p_sys->ti.quality = ((float)i_quality) * 6.3;
684 p_sys->ti.dropframes_p = 0;
685 p_sys->ti.quick_p = 1;
686 p_sys->ti.keyframe_auto_p = 1;
687 p_sys->ti.keyframe_frequency = 64;
688 p_sys->ti.keyframe_frequency_force = 64;
689 p_sys->ti.keyframe_data_target_bitrate = p_enc->fmt_out.i_bitrate * 1.5;
690 p_sys->ti.keyframe_auto_threshold = 80;
691 p_sys->ti.keyframe_mindistance = 8;
692 p_sys->ti.noise_sensitivity = 1;
694 theora_encode_init( &p_sys->td, &p_sys->ti );
695 theora_comment_init( &p_sys->tc );
697 /* Create and store headers */
698 p_enc->fmt_out.i_extra = 3 * 2;
699 for( i = 0; i < 3; i++ )
701 if( i == 0 ) theora_encode_header( &p_sys->td, &header );
702 else if( i == 1 ) theora_encode_comment( &p_sys->tc, &header );
703 else if( i == 2 ) theora_encode_tables( &p_sys->td, &header );
705 p_enc->fmt_out.p_extra = xrealloc( p_enc->fmt_out.p_extra,
706 p_enc->fmt_out.i_extra + header.bytes );
707 p_extra = p_enc->fmt_out.p_extra;
708 p_extra += p_enc->fmt_out.i_extra + (i-3)*2;
709 p_enc->fmt_out.i_extra += header.bytes;
711 *(p_extra++) = header.bytes >> 8;
712 *(p_extra++) = header.bytes & 0xFF;
714 memcpy( p_extra, header.packet, header.bytes );
720 /****************************************************************************
721 * Encode: the whole thing
722 ****************************************************************************
723 * This function spits out ogg packets.
724 ****************************************************************************/
725 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
727 encoder_sys_t *p_sys = p_enc->p_sys;
728 ogg_packet oggpacket;
734 if( p_pict->p[0].i_pitch < (int)p_sys->i_width ||
735 p_pict->p[0].i_lines < (int)p_sys->i_height )
737 msg_Warn( p_enc, "frame is smaller than encoding size"
738 "(%ix%i->%ix%i) -> dropping frame",
739 p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
740 p_sys->i_width, p_sys->i_height );
745 if( p_pict->p[0].i_visible_pitch < (int)p_sys->i_width )
747 for( i = 0; i < p_sys->i_height; i++ )
749 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
750 p_pict->p[0].i_visible_pitch,
751 *( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
752 p_pict->p[0].i_visible_pitch - 1 ),
753 p_sys->i_width - p_pict->p[0].i_visible_pitch );
755 for( i = 0; i < p_sys->i_height / 2; i++ )
757 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
758 p_pict->p[1].i_visible_pitch,
759 *( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
760 p_pict->p[1].i_visible_pitch - 1 ),
761 p_sys->i_width / 2 - p_pict->p[1].i_visible_pitch );
762 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
763 p_pict->p[2].i_visible_pitch,
764 *( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
765 p_pict->p[2].i_visible_pitch - 1 ),
766 p_sys->i_width / 2 - p_pict->p[2].i_visible_pitch );
770 if( p_pict->p[0].i_visible_lines < (int)p_sys->i_height )
772 for( i = p_pict->p[0].i_visible_lines; i < p_sys->i_height; i++ )
774 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch, 0,
777 for( i = p_pict->p[1].i_visible_lines; i < p_sys->i_height / 2; i++ )
779 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch, 0x80,
780 p_sys->i_width / 2 );
781 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch, 0x80,
782 p_sys->i_width / 2 );
786 /* Theora is a one-frame-in, one-frame-out system. Submit a frame
787 * for compression and pull out the packet. */
789 yuv.y_width = p_sys->i_width;
790 yuv.y_height = p_sys->i_height;
791 yuv.y_stride = p_pict->p[0].i_pitch;
793 yuv.uv_width = p_sys->i_width / 2;
794 yuv.uv_height = p_sys->i_height / 2;
795 yuv.uv_stride = p_pict->p[1].i_pitch;
797 yuv.y = p_pict->p[0].p_pixels;
798 yuv.u = p_pict->p[1].p_pixels;
799 yuv.v = p_pict->p[2].p_pixels;
801 if( theora_encode_YUVin( &p_sys->td, &yuv ) < 0 )
803 msg_Warn( p_enc, "failed encoding a frame" );
807 theora_encode_packetout( &p_sys->td, 0, &oggpacket );
809 /* Ogg packet to block */
810 p_block = block_New( p_enc, oggpacket.bytes );
811 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
812 p_block->i_dts = p_block->i_pts = p_pict->date;
814 if( theora_packet_iskeyframe( &oggpacket ) )
816 p_block->i_flags |= BLOCK_FLAG_TYPE_I;
822 /*****************************************************************************
823 * CloseEncoder: theora encoder destruction
824 *****************************************************************************/
825 static void CloseEncoder( vlc_object_t *p_this )
827 encoder_t *p_enc = (encoder_t *)p_this;
828 encoder_sys_t *p_sys = p_enc->p_sys;
830 theora_info_clear( &p_sys->ti );
831 theora_comment_clear( &p_sys->tc );