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 *****************************************************************************/
28 #include <vlc_codec.h>
31 #include <vlc_input.h>
34 #include <theora/theora.h>
36 /*****************************************************************************
37 * decoder_sys_t : theora decoder descriptor
38 *****************************************************************************/
42 vlc_bool_t b_packetizer;
52 theora_info ti; /* theora bitstream settings */
53 theora_comment tc; /* theora comment header */
54 theora_state td; /* theora bitstream user comments */
59 vlc_bool_t b_decoded_first_keyframe;
67 /*****************************************************************************
69 *****************************************************************************/
70 static int OpenDecoder ( vlc_object_t * );
71 static int OpenPacketizer( vlc_object_t * );
72 static void CloseDecoder ( vlc_object_t * );
74 static void *DecodeBlock ( decoder_t *, block_t ** );
75 static int ProcessHeaders( decoder_t * );
76 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
78 static picture_t *DecodePacket( decoder_t *, ogg_packet * );
80 static void ParseTheoraComments( decoder_t * );
81 static void theora_CopyPicture( decoder_t *, picture_t *, yuv_buffer * );
83 static int OpenEncoder( vlc_object_t *p_this );
84 static void CloseEncoder( vlc_object_t *p_this );
85 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
87 /*****************************************************************************
89 *****************************************************************************/
90 #define ENC_QUALITY_TEXT N_("Encoding quality")
91 #define ENC_QUALITY_LONGTEXT N_( \
92 "Enforce a quality between 1 (low) and 10 (high), instead " \
93 "of specifying a particular bitrate. This will produce a VBR stream." )
96 set_category( CAT_INPUT );
97 set_subcategory( SUBCAT_INPUT_VCODEC );
98 set_shortname( "Theora" );
99 set_description( _("Theora video decoder") );
100 set_capability( "decoder", 100 );
101 set_callbacks( OpenDecoder, CloseDecoder );
102 add_shortcut( "theora" );
105 set_description( _("Theora video packetizer") );
106 set_capability( "packetizer", 100 );
107 set_callbacks( OpenPacketizer, CloseDecoder );
108 add_shortcut( "theora" );
111 set_description( _("Theora video encoder") );
112 set_capability( "encoder", 150 );
113 set_callbacks( OpenEncoder, CloseEncoder );
114 add_shortcut( "theora" );
116 # define ENC_CFG_PREFIX "sout-theora-"
117 add_integer( ENC_CFG_PREFIX "quality", 2, NULL, ENC_QUALITY_TEXT,
118 ENC_QUALITY_LONGTEXT, VLC_FALSE );
121 static const char *ppsz_enc_options[] = {
125 /*****************************************************************************
126 * OpenDecoder: probe the decoder and return score
127 *****************************************************************************/
128 static int OpenDecoder( vlc_object_t *p_this )
130 decoder_t *p_dec = (decoder_t*)p_this;
131 decoder_sys_t *p_sys;
133 if( p_dec->fmt_in.i_codec != VLC_FOURCC('t','h','e','o') )
138 /* Allocate the memory needed to store the decoder's structure */
139 if( ( p_dec->p_sys = p_sys =
140 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
142 msg_Err( p_dec, "out of memory" );
145 p_dec->p_sys->b_packetizer = VLC_FALSE;
148 p_sys->b_decoded_first_keyframe = VLC_FALSE;
150 /* Set output properties */
151 p_dec->fmt_out.i_cat = VIDEO_ES;
152 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
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 = VLC_TRUE;
178 p_dec->fmt_out.i_codec = VLC_FOURCC( 't', 'h', 'e', 'o' );
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 =
219 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
220 oggpacket.bytes + 2 );
221 p_extra = p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra;
222 *(p_extra++) = oggpacket.bytes >> 8;
223 *(p_extra++) = oggpacket.bytes & 0xFF;
225 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
226 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
228 block_Release( *pp_block );
233 if( p_sys->i_headers == 3 )
235 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
237 p_sys->i_headers = 0;
238 p_dec->fmt_in.i_extra = 0;
239 block_Release( *pp_block );
242 else p_sys->i_headers++;
245 return ProcessPacket( p_dec, &oggpacket, pp_block );
248 /*****************************************************************************
249 * ProcessHeaders: process Theora headers.
250 *****************************************************************************/
251 static int ProcessHeaders( decoder_t *p_dec )
253 decoder_sys_t *p_sys = p_dec->p_sys;
254 ogg_packet oggpacket;
258 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
260 oggpacket.granulepos = -1;
261 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
263 oggpacket.packetno = 0;
264 p_extra = p_dec->fmt_in.p_extra;
265 i_extra = p_dec->fmt_in.i_extra;
267 /* Take care of the initial Vorbis header */
268 oggpacket.bytes = *(p_extra++) << 8;
269 oggpacket.bytes |= (*(p_extra++) & 0xFF);
270 oggpacket.packet = p_extra;
271 p_extra += oggpacket.bytes;
272 i_extra -= (oggpacket.bytes + 2);
275 msg_Err( p_dec, "header data corrupted");
279 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
281 msg_Err( p_dec, "this bitstream does not contain Theora video data" );
285 /* Set output properties */
286 p_dec->fmt_out.video.i_width = p_sys->ti.width;
287 p_dec->fmt_out.video.i_height = p_sys->ti.height;
288 if( p_sys->ti.frame_width && p_sys->ti.frame_height )
290 p_dec->fmt_out.video.i_width = p_sys->ti.frame_width;
291 p_dec->fmt_out.video.i_height = p_sys->ti.frame_height;
294 if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
296 p_dec->fmt_out.video.i_aspect = ((int64_t)VOUT_ASPECT_FACTOR) *
297 ( p_sys->ti.aspect_numerator * p_dec->fmt_out.video.i_width ) /
298 ( p_sys->ti.aspect_denominator * p_dec->fmt_out.video.i_height );
302 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
303 p_sys->ti.frame_width / p_sys->ti.frame_height;
306 if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
308 p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
309 p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
312 msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
313 "is %dx%d with offset (%d,%d)",
314 p_sys->ti.width, p_sys->ti.height,
315 (double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
316 p_sys->ti.frame_width, p_sys->ti.frame_height,
317 p_sys->ti.offset_x, p_sys->ti.offset_y );
319 /* Sanity check that seems necessary for some corrupted files */
320 if( p_sys->ti.width < p_sys->ti.frame_width ||
321 p_sys->ti.height < p_sys->ti.frame_height )
323 msg_Warn( p_dec, "trying to correct invalid theora header "
324 "(frame size (%dx%d) is smaller than frame content (%d,%d))",
325 p_sys->ti.width, p_sys->ti.height,
326 p_sys->ti.frame_width, p_sys->ti.frame_height );
328 if( p_sys->ti.width < p_sys->ti.frame_width )
329 p_sys->ti.width = p_sys->ti.frame_width;
330 if( p_sys->ti.height < p_sys->ti.frame_height )
331 p_sys->ti.height = p_sys->ti.frame_height;
334 /* The next packet in order is the comments header */
336 oggpacket.bytes = *(p_extra++) << 8;
337 oggpacket.bytes |= (*(p_extra++) & 0xFF);
338 oggpacket.packet = p_extra;
339 p_extra += oggpacket.bytes;
340 i_extra -= (oggpacket.bytes + 2);
343 msg_Err( p_dec, "header data corrupted");
347 /* The next packet in order is the comments header */
348 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
350 msg_Err( p_dec, "2nd Theora header is corrupted" );
354 ParseTheoraComments( p_dec );
356 /* The next packet in order is the codebooks header
357 * We need to watch out that this packet is not missing as a
358 * missing or corrupted header is fatal. */
359 oggpacket.bytes = *(p_extra++) << 8;
360 oggpacket.bytes |= (*(p_extra++) & 0xFF);
361 oggpacket.packet = p_extra;
362 i_extra -= (oggpacket.bytes + 2);
365 msg_Err( p_dec, "header data corrupted");
369 /* The next packet in order is the codebooks header
370 * We need to watch out that this packet is not missing as a
371 * missing or corrupted header is fatal */
372 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
374 msg_Err( p_dec, "3rd Theora header is corrupted" );
378 if( !p_sys->b_packetizer )
380 /* We have all the headers, initialize decoder */
381 theora_decode_init( &p_sys->td, &p_sys->ti );
385 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
386 p_dec->fmt_out.p_extra =
387 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
388 memcpy( p_dec->fmt_out.p_extra,
389 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
395 /*****************************************************************************
396 * ProcessPacket: processes a theora packet.
397 *****************************************************************************/
398 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
401 decoder_sys_t *p_sys = p_dec->p_sys;
402 block_t *p_block = *pp_block;
405 if( ( p_block->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) != 0 )
407 /* Don't send the the first packet after a discontinuity to
408 * theora_decode, otherwise we get purple/green display artifacts
409 * appearing in the video output */
413 /* Date management */
414 if( p_block->i_pts > 0 && p_block->i_pts != p_sys->i_pts )
416 p_sys->i_pts = p_block->i_pts;
419 *pp_block = NULL; /* To avoid being fed the same packet again */
421 if( p_sys->b_packetizer )
423 /* Date management */
424 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
426 if( p_sys->i_headers >= 3 )
427 p_block->i_length = p_sys->i_pts - p_block->i_pts;
429 p_block->i_length = 0;
435 if( p_sys->i_headers >= 3 )
436 p_buf = DecodePacket( p_dec, p_oggpacket );
440 if( p_block ) block_Release( p_block );
443 /* Date management */
444 p_sys->i_pts += ( I64C(1000000) * p_sys->ti.fps_denominator /
445 p_sys->ti.fps_numerator ); /* 1 frame per packet */
450 /*****************************************************************************
451 * DecodePacket: decodes a Theora packet.
452 *****************************************************************************/
453 static picture_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
455 decoder_sys_t *p_sys = p_dec->p_sys;
459 theora_decode_packetin( &p_sys->td, p_oggpacket );
461 /* Check for keyframe */
462 if( !(p_oggpacket->packet[0] & 0x80) /* data packet */ &&
463 !(p_oggpacket->packet[0] & 0x40) /* intra frame */ )
464 p_sys->b_decoded_first_keyframe = VLC_TRUE;
466 /* If we haven't seen a single keyframe yet, don't let Theora decode
467 * anything, otherwise we'll get display artifacts. (This is impossible
468 * in the general case, but can happen if e.g. we play a network stream
469 * using a timed URL, such that the server doesn't start the video with a
471 if( p_sys->b_decoded_first_keyframe )
472 theora_decode_YUVout( &p_sys->td, &yuv );
476 /* Get a new picture */
477 p_pic = p_dec->pf_vout_buffer_new( p_dec );
478 if( !p_pic ) return NULL;
480 theora_CopyPicture( p_dec, p_pic, &yuv );
482 p_pic->date = p_sys->i_pts;
487 /*****************************************************************************
488 * ParseTheoraComments: FIXME should be done in demuxer
489 *****************************************************************************/
490 static void ParseTheoraComments( decoder_t *p_dec )
492 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
493 char *psz_name, *psz_value, *psz_comment;
496 if( p_input->i_object_type != VLC_OBJECT_INPUT ) return;
498 while ( i < p_dec->p_sys->tc.comments )
500 psz_comment = strdup( p_dec->p_sys->tc.user_comments[i] );
503 msg_Warn( p_dec, "out of memory" );
506 psz_name = psz_comment;
507 psz_value = strchr( psz_comment, '=' );
512 input_Control( p_input, INPUT_ADD_INFO, _("Theora comment"),
513 psz_name, psz_value );
520 /*****************************************************************************
521 * CloseDecoder: theora decoder destruction
522 *****************************************************************************/
523 static void CloseDecoder( vlc_object_t *p_this )
525 decoder_t *p_dec = (decoder_t *)p_this;
526 decoder_sys_t *p_sys = p_dec->p_sys;
528 theora_info_clear( &p_sys->ti );
529 theora_comment_clear( &p_sys->tc );
534 /*****************************************************************************
535 * theora_CopyPicture: copy a picture from theora internal buffers to a
536 * picture_t structure.
537 *****************************************************************************/
538 static void theora_CopyPicture( decoder_t *p_dec, picture_t *p_pic,
541 int i_plane, i_line, i_width, i_dst_stride, i_src_stride;
542 int i_src_xoffset, i_src_yoffset;
543 uint8_t *p_dst, *p_src;
545 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
547 p_dst = p_pic->p[i_plane].p_pixels;
548 p_src = i_plane ? (i_plane - 1 ? yuv->v : yuv->u ) : yuv->y;
549 i_width = p_pic->p[i_plane].i_visible_pitch;
550 i_dst_stride = p_pic->p[i_plane].i_pitch;
551 i_src_stride = i_plane ? yuv->uv_stride : yuv->y_stride;
552 i_src_xoffset = p_dec->p_sys->ti.offset_x;
553 i_src_yoffset = p_dec->p_sys->ti.offset_y;
560 p_src += (i_src_yoffset * i_src_stride + i_src_xoffset);
562 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
564 p_dec->p_libvlc->pf_memcpy( p_dst, p_src + i_src_xoffset,
565 i_plane ? yuv->uv_width : yuv->y_width );
566 p_src += i_src_stride;
567 p_dst += i_dst_stride;
572 /*****************************************************************************
573 * encoder_sys_t : theora encoder descriptor
574 *****************************************************************************/
580 vlc_bool_t b_headers;
585 theora_info ti; /* theora bitstream settings */
586 theora_comment tc; /* theora comment header */
587 theora_state td; /* theora bitstream user comments */
589 int i_width, i_height;
592 /*****************************************************************************
593 * OpenEncoder: probe the encoder and return score
594 *****************************************************************************/
595 static int OpenEncoder( vlc_object_t *p_this )
597 encoder_t *p_enc = (encoder_t *)p_this;
598 encoder_sys_t *p_sys = p_enc->p_sys;
604 if( p_enc->fmt_out.i_codec != VLC_FOURCC('t','h','e','o') &&
610 /* Allocate the memory needed to store the decoder's structure */
611 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
613 msg_Err( p_enc, "out of memory" );
616 p_enc->p_sys = p_sys;
618 p_enc->pf_encode_video = Encode;
619 p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
620 p_enc->fmt_out.i_codec = VLC_FOURCC('t','h','e','o');
622 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
624 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
625 i_quality = val.i_int;
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_aspect )
668 uint64_t i_num, i_den;
669 unsigned i_dst_num, i_dst_den;
671 i_num = p_enc->fmt_in.video.i_aspect * (int64_t)p_sys->ti.height;
672 i_den = VOUT_ASPECT_FACTOR * p_sys->ti.width;
673 vlc_ureduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );
674 p_sys->ti.aspect_numerator = i_dst_num;
675 p_sys->ti.aspect_denominator = i_dst_den;
679 p_sys->ti.aspect_numerator = 4;
680 p_sys->ti.aspect_denominator = 3;
683 p_sys->ti.target_bitrate = p_enc->fmt_out.i_bitrate;
684 p_sys->ti.quality = ((float)i_quality) * 6.3;
686 p_sys->ti.dropframes_p = 0;
687 p_sys->ti.quick_p = 1;
688 p_sys->ti.keyframe_auto_p = 1;
689 p_sys->ti.keyframe_frequency = 64;
690 p_sys->ti.keyframe_frequency_force = 64;
691 p_sys->ti.keyframe_data_target_bitrate = p_enc->fmt_out.i_bitrate * 1.5;
692 p_sys->ti.keyframe_auto_threshold = 80;
693 p_sys->ti.keyframe_mindistance = 8;
694 p_sys->ti.noise_sensitivity = 1;
696 theora_encode_init( &p_sys->td, &p_sys->ti );
697 theora_info_clear( &p_sys->ti );
698 theora_comment_init( &p_sys->tc );
700 /* Create and store headers */
701 p_enc->fmt_out.i_extra = 3 * 2;
702 for( i = 0; i < 3; i++ )
704 if( i == 0 ) theora_encode_header( &p_sys->td, &header );
705 else if( i == 1 ) theora_encode_comment( &p_sys->tc, &header );
706 else if( i == 2 ) theora_encode_tables( &p_sys->td, &header );
708 p_enc->fmt_out.p_extra =
709 realloc( p_enc->fmt_out.p_extra,
710 p_enc->fmt_out.i_extra + header.bytes );
711 p_extra = p_enc->fmt_out.p_extra;
712 p_extra += p_enc->fmt_out.i_extra + (i-3)*2;
713 p_enc->fmt_out.i_extra += header.bytes;
715 *(p_extra++) = header.bytes >> 8;
716 *(p_extra++) = header.bytes & 0xFF;
718 memcpy( p_extra, header.packet, header.bytes );
724 /****************************************************************************
725 * Encode: the whole thing
726 ****************************************************************************
727 * This function spits out ogg packets.
728 ****************************************************************************/
729 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
731 encoder_sys_t *p_sys = p_enc->p_sys;
732 ogg_packet oggpacket;
738 if( p_pict->p[0].i_pitch < (int)p_sys->i_width ||
739 p_pict->p[0].i_lines < (int)p_sys->i_height )
741 msg_Warn( p_enc, "frame is smaller than encoding size"
742 "(%ix%i->%ix%i) -> dropping frame",
743 p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
744 p_sys->i_width, p_sys->i_height );
749 if( p_pict->p[0].i_visible_pitch < (int)p_sys->i_width )
751 for( i = 0; i < p_sys->i_height; i++ )
753 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
754 p_pict->p[0].i_visible_pitch,
755 *( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
756 p_pict->p[0].i_visible_pitch - 1 ),
757 p_sys->i_width - p_pict->p[0].i_visible_pitch );
759 for( i = 0; i < p_sys->i_height / 2; i++ )
761 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
762 p_pict->p[1].i_visible_pitch,
763 *( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
764 p_pict->p[1].i_visible_pitch - 1 ),
765 p_sys->i_width / 2 - p_pict->p[1].i_visible_pitch );
766 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
767 p_pict->p[2].i_visible_pitch,
768 *( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
769 p_pict->p[2].i_visible_pitch - 1 ),
770 p_sys->i_width / 2 - p_pict->p[2].i_visible_pitch );
774 if( p_pict->p[0].i_visible_lines < (int)p_sys->i_height )
776 for( i = p_pict->p[0].i_visible_lines; i < p_sys->i_height; i++ )
778 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch, 0,
781 for( i = p_pict->p[1].i_visible_lines; i < p_sys->i_height / 2; i++ )
783 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch, 0x80,
784 p_sys->i_width / 2 );
785 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch, 0x80,
786 p_sys->i_width / 2 );
790 /* Theora is a one-frame-in, one-frame-out system. Submit a frame
791 * for compression and pull out the packet. */
793 yuv.y_width = p_sys->i_width;
794 yuv.y_height = p_sys->i_height;
795 yuv.y_stride = p_pict->p[0].i_pitch;
797 yuv.uv_width = p_sys->i_width / 2;
798 yuv.uv_height = p_sys->i_height / 2;
799 yuv.uv_stride = p_pict->p[1].i_pitch;
801 yuv.y = p_pict->p[0].p_pixels;
802 yuv.u = p_pict->p[1].p_pixels;
803 yuv.v = p_pict->p[2].p_pixels;
805 if( theora_encode_YUVin( &p_sys->td, &yuv ) < 0 )
807 msg_Warn( p_enc, "failed encoding a frame" );
811 theora_encode_packetout( &p_sys->td, 0, &oggpacket );
813 /* Ogg packet to block */
814 p_block = block_New( p_enc, oggpacket.bytes );
815 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
816 p_block->i_dts = p_block->i_pts = p_pict->date;
821 /*****************************************************************************
822 * CloseEncoder: theora encoder destruction
823 *****************************************************************************/
824 static void CloseEncoder( vlc_object_t *p_this )
826 encoder_t *p_enc = (encoder_t *)p_this;
827 encoder_sys_t *p_sys = p_enc->p_sys;
829 theora_info_clear( &p_sys->ti );
830 theora_comment_clear( &p_sys->tc );