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>
36 #include <vlc_input.h>
39 #include <theora/theora.h>
41 /*****************************************************************************
42 * decoder_sys_t : theora decoder descriptor
43 *****************************************************************************/
57 theora_info ti; /* theora bitstream settings */
58 theora_comment tc; /* theora comment header */
59 theora_state td; /* theora bitstream user comments */
64 bool b_decoded_first_keyframe;
72 /*****************************************************************************
74 *****************************************************************************/
75 static int OpenDecoder ( vlc_object_t * );
76 static int OpenPacketizer( vlc_object_t * );
77 static void CloseDecoder ( vlc_object_t * );
79 static void *DecodeBlock ( decoder_t *, block_t ** );
80 static int ProcessHeaders( decoder_t * );
81 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
83 static picture_t *DecodePacket( decoder_t *, ogg_packet * );
85 static void ParseTheoraComments( decoder_t * );
86 static void theora_CopyPicture( decoder_t *, picture_t *, yuv_buffer * );
88 static int OpenEncoder( vlc_object_t *p_this );
89 static void CloseEncoder( vlc_object_t *p_this );
90 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
92 /*****************************************************************************
94 *****************************************************************************/
95 #define ENC_QUALITY_TEXT N_("Encoding quality")
96 #define ENC_QUALITY_LONGTEXT N_( \
97 "Enforce a quality between 1 (low) and 10 (high), instead " \
98 "of specifying a particular bitrate. This will produce a VBR stream." )
101 set_category( CAT_INPUT )
102 set_subcategory( SUBCAT_INPUT_VCODEC )
103 set_shortname( "Theora" )
104 set_description( N_("Theora video decoder") )
105 set_capability( "decoder", 100 )
106 set_callbacks( OpenDecoder, CloseDecoder )
107 add_shortcut( "theora" )
110 set_description( N_("Theora video packetizer") )
111 set_capability( "packetizer", 100 )
112 set_callbacks( OpenPacketizer, CloseDecoder )
113 add_shortcut( "theora" )
116 set_description( N_("Theora video encoder") )
117 set_capability( "encoder", 150 )
118 set_callbacks( OpenEncoder, CloseEncoder )
119 add_shortcut( "theora" )
121 # define ENC_CFG_PREFIX "sout-theora-"
122 add_integer( ENC_CFG_PREFIX "quality", 2, NULL, ENC_QUALITY_TEXT,
123 ENC_QUALITY_LONGTEXT, false )
126 static const char *const ppsz_enc_options[] = {
130 /*****************************************************************************
131 * OpenDecoder: probe the decoder and return score
132 *****************************************************************************/
133 static int OpenDecoder( vlc_object_t *p_this )
135 decoder_t *p_dec = (decoder_t*)p_this;
136 decoder_sys_t *p_sys;
138 if( p_dec->fmt_in.i_codec != VLC_FOURCC('t','h','e','o') )
143 /* Allocate the memory needed to store the decoder's structure */
144 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
146 p_dec->p_sys->b_packetizer = false;
149 p_sys->b_decoded_first_keyframe = false;
151 /* Set output properties */
152 p_dec->fmt_out.i_cat = VIDEO_ES;
153 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
156 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
158 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
161 /* Init supporting Theora structures needed in header parsing */
162 theora_comment_init( &p_sys->tc );
163 theora_info_init( &p_sys->ti );
165 p_sys->i_headers = 0;
170 static int OpenPacketizer( vlc_object_t *p_this )
172 decoder_t *p_dec = (decoder_t*)p_this;
174 int i_ret = OpenDecoder( p_this );
176 if( i_ret == VLC_SUCCESS )
178 p_dec->p_sys->b_packetizer = true;
179 p_dec->fmt_out.i_codec = VLC_FOURCC( 't', 'h', 'e', 'o' );
185 /****************************************************************************
186 * DecodeBlock: the whole thing
187 ****************************************************************************
188 * This function must be fed with ogg packets.
189 ****************************************************************************/
190 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
192 decoder_sys_t *p_sys = p_dec->p_sys;
194 ogg_packet oggpacket;
196 if( !pp_block || !*pp_block ) return NULL;
200 /* Block to Ogg packet */
201 oggpacket.packet = p_block->p_buffer;
202 oggpacket.bytes = p_block->i_buffer;
203 oggpacket.granulepos = p_block->i_dts;
206 oggpacket.packetno = 0;
208 /* Check for headers */
209 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
211 /* Headers already available as extra data */
212 p_sys->i_headers = 3;
214 else if( oggpacket.bytes && p_sys->i_headers < 3 )
216 /* Backup headers as extra data */
219 p_dec->fmt_in.p_extra =
220 realloc( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra +
221 oggpacket.bytes + 2 );
222 p_extra = ((uint8_t *)p_dec->fmt_in.p_extra) + p_dec->fmt_in.i_extra;
223 *(p_extra++) = oggpacket.bytes >> 8;
224 *(p_extra++) = oggpacket.bytes & 0xFF;
226 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
227 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
229 block_Release( *pp_block );
234 if( p_sys->i_headers == 3 )
236 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
238 p_sys->i_headers = 0;
239 p_dec->fmt_in.i_extra = 0;
240 block_Release( *pp_block );
243 else p_sys->i_headers++;
246 return ProcessPacket( p_dec, &oggpacket, pp_block );
249 /*****************************************************************************
250 * ProcessHeaders: process Theora headers.
251 *****************************************************************************/
252 static int ProcessHeaders( decoder_t *p_dec )
254 decoder_sys_t *p_sys = p_dec->p_sys;
255 ogg_packet oggpacket;
259 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
261 oggpacket.granulepos = -1;
262 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
264 oggpacket.packetno = 0;
265 p_extra = p_dec->fmt_in.p_extra;
266 i_extra = p_dec->fmt_in.i_extra;
268 /* Take care of the initial Vorbis header */
269 oggpacket.bytes = *(p_extra++) << 8;
270 oggpacket.bytes |= (*(p_extra++) & 0xFF);
271 oggpacket.packet = p_extra;
272 p_extra += oggpacket.bytes;
273 i_extra -= (oggpacket.bytes + 2);
276 msg_Err( p_dec, "header data corrupted");
280 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
282 msg_Err( p_dec, "this bitstream does not contain Theora video data" );
286 /* Set output properties */
287 switch( p_sys->ti.pixelformat )
290 p_dec->fmt_out.i_codec = VLC_FOURCC( 'I','4','2','0' );
293 p_dec->fmt_out.i_codec = VLC_FOURCC( 'I','4','2','2' );
296 p_dec->fmt_out.i_codec = VLC_FOURCC( 'I','4','4','4' );
300 msg_Err( p_dec, "unknown chroma in theora sample" );
303 p_dec->fmt_out.video.i_width = p_sys->ti.width;
304 p_dec->fmt_out.video.i_height = p_sys->ti.height;
305 if( p_sys->ti.frame_width && p_sys->ti.frame_height )
307 p_dec->fmt_out.video.i_visible_width = p_sys->ti.frame_width;
308 p_dec->fmt_out.video.i_visible_height = p_sys->ti.frame_height;
309 if( p_sys->ti.offset_x || p_sys->ti.offset_y )
311 p_dec->fmt_out.video.i_x_offset = p_sys->ti.offset_x;
312 p_dec->fmt_out.video.i_y_offset = p_sys->ti.offset_y;
316 if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
318 p_dec->fmt_out.video.i_aspect = ((int64_t)VOUT_ASPECT_FACTOR) *
319 ( p_sys->ti.aspect_numerator * p_dec->fmt_out.video.i_width ) /
320 ( p_sys->ti.aspect_denominator * p_dec->fmt_out.video.i_height );
324 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
325 p_sys->ti.frame_width / p_sys->ti.frame_height;
328 if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
330 p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
331 p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
334 msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
335 "is %dx%d with offset (%d,%d)",
336 p_sys->ti.width, p_sys->ti.height,
337 (double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
338 p_sys->ti.frame_width, p_sys->ti.frame_height,
339 p_sys->ti.offset_x, p_sys->ti.offset_y );
341 /* Sanity check that seems necessary for some corrupted files */
342 if( p_sys->ti.width < p_sys->ti.frame_width ||
343 p_sys->ti.height < p_sys->ti.frame_height )
345 msg_Warn( p_dec, "trying to correct invalid theora header "
346 "(frame size (%dx%d) is smaller than frame content (%d,%d))",
347 p_sys->ti.width, p_sys->ti.height,
348 p_sys->ti.frame_width, p_sys->ti.frame_height );
350 if( p_sys->ti.width < p_sys->ti.frame_width )
351 p_sys->ti.width = p_sys->ti.frame_width;
352 if( p_sys->ti.height < p_sys->ti.frame_height )
353 p_sys->ti.height = p_sys->ti.frame_height;
356 /* The next packet in order is the comments header */
358 oggpacket.bytes = *(p_extra++) << 8;
359 oggpacket.bytes |= (*(p_extra++) & 0xFF);
360 oggpacket.packet = p_extra;
361 p_extra += oggpacket.bytes;
362 i_extra -= (oggpacket.bytes + 2);
365 msg_Err( p_dec, "header data corrupted");
369 /* The next packet in order is the comments header */
370 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
372 msg_Err( p_dec, "2nd Theora header is corrupted" );
376 ParseTheoraComments( p_dec );
378 /* The next packet in order is the codebooks header
379 * We need to watch out that this packet is not missing as a
380 * missing or corrupted header is fatal. */
381 oggpacket.bytes = *(p_extra++) << 8;
382 oggpacket.bytes |= (*(p_extra++) & 0xFF);
383 oggpacket.packet = p_extra;
384 i_extra -= (oggpacket.bytes + 2);
387 msg_Err( p_dec, "header data corrupted");
391 /* The next packet in order is the codebooks header
392 * We need to watch out that this packet is not missing as a
393 * missing or corrupted header is fatal */
394 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
396 msg_Err( p_dec, "3rd Theora header is corrupted" );
400 if( !p_sys->b_packetizer )
402 /* We have all the headers, initialize decoder */
403 theora_decode_init( &p_sys->td, &p_sys->ti );
407 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
408 p_dec->fmt_out.p_extra =
409 realloc( p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
410 memcpy( p_dec->fmt_out.p_extra,
411 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
417 /*****************************************************************************
418 * ProcessPacket: processes a theora packet.
419 *****************************************************************************/
420 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
423 decoder_sys_t *p_sys = p_dec->p_sys;
424 block_t *p_block = *pp_block;
427 if( ( p_block->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) != 0 )
429 /* Don't send the the first packet after a discontinuity to
430 * theora_decode, otherwise we get purple/green display artifacts
431 * appearing in the video output */
435 /* Date management */
436 if( p_block->i_pts > 0 && p_block->i_pts != p_sys->i_pts )
438 p_sys->i_pts = p_block->i_pts;
441 *pp_block = NULL; /* To avoid being fed the same packet again */
443 if( p_sys->b_packetizer )
445 /* Date management */
446 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
448 if( p_sys->i_headers >= 3 )
449 p_block->i_length = p_sys->i_pts - p_block->i_pts;
451 p_block->i_length = 0;
457 if( p_sys->i_headers >= 3 )
458 p_buf = DecodePacket( p_dec, p_oggpacket );
462 if( p_block ) block_Release( p_block );
465 /* Date management */
466 p_sys->i_pts += ( INT64_C(1000000) * p_sys->ti.fps_denominator /
467 p_sys->ti.fps_numerator ); /* 1 frame per packet */
472 /*****************************************************************************
473 * DecodePacket: decodes a Theora packet.
474 *****************************************************************************/
475 static picture_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
477 decoder_sys_t *p_sys = p_dec->p_sys;
481 theora_decode_packetin( &p_sys->td, p_oggpacket );
483 /* Check for keyframe */
484 if( !(p_oggpacket->packet[0] & 0x80) /* data packet */ &&
485 !(p_oggpacket->packet[0] & 0x40) /* intra frame */ )
486 p_sys->b_decoded_first_keyframe = true;
488 /* If we haven't seen a single keyframe yet, don't let Theora decode
489 * anything, otherwise we'll get display artifacts. (This is impossible
490 * in the general case, but can happen if e.g. we play a network stream
491 * using a timed URL, such that the server doesn't start the video with a
493 if( p_sys->b_decoded_first_keyframe )
494 theora_decode_YUVout( &p_sys->td, &yuv );
498 /* Get a new picture */
499 p_pic = decoder_NewPicture( p_dec );
500 if( !p_pic ) return NULL;
502 theora_CopyPicture( p_dec, p_pic, &yuv );
504 p_pic->date = p_sys->i_pts;
509 /*****************************************************************************
510 * ParseTheoraComments:
511 *****************************************************************************/
512 static void ParseTheoraComments( decoder_t *p_dec )
514 char *psz_name, *psz_value, *psz_comment;
517 while ( i < p_dec->p_sys->tc.comments )
519 psz_comment = strdup( p_dec->p_sys->tc.user_comments[i] );
522 psz_name = psz_comment;
523 psz_value = strchr( psz_comment, '=' );
529 if( !p_dec->p_description )
530 p_dec->p_description = vlc_meta_New();
531 if( p_dec->p_description )
532 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
539 /*****************************************************************************
540 * CloseDecoder: theora decoder destruction
541 *****************************************************************************/
542 static void CloseDecoder( vlc_object_t *p_this )
544 decoder_t *p_dec = (decoder_t *)p_this;
545 decoder_sys_t *p_sys = p_dec->p_sys;
547 theora_info_clear( &p_sys->ti );
548 theora_comment_clear( &p_sys->tc );
553 /*****************************************************************************
554 * theora_CopyPicture: copy a picture from theora internal buffers to a
555 * picture_t structure.
556 *****************************************************************************/
557 static void theora_CopyPicture( decoder_t *p_dec, picture_t *p_pic,
560 int i_plane, i_line, i_dst_stride, i_src_stride;
561 uint8_t *p_dst, *p_src;
563 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
565 p_dst = p_pic->p[i_plane].p_pixels;
566 p_src = i_plane ? (i_plane - 1 ? yuv->v : yuv->u ) : yuv->y;
567 i_dst_stride = p_pic->p[i_plane].i_pitch;
568 i_src_stride = i_plane ? yuv->uv_stride : yuv->y_stride;
570 for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
572 vlc_memcpy( p_dst, p_src,
573 i_plane ? yuv->uv_width : yuv->y_width );
574 p_src += i_src_stride;
575 p_dst += i_dst_stride;
580 /*****************************************************************************
581 * encoder_sys_t : theora encoder descriptor
582 *****************************************************************************/
593 theora_info ti; /* theora bitstream settings */
594 theora_comment tc; /* theora comment header */
595 theora_state td; /* theora bitstream user comments */
597 int i_width, i_height;
600 /*****************************************************************************
601 * OpenEncoder: probe the encoder and return score
602 *****************************************************************************/
603 static int OpenEncoder( vlc_object_t *p_this )
605 encoder_t *p_enc = (encoder_t *)p_this;
606 encoder_sys_t *p_sys = p_enc->p_sys;
612 if( p_enc->fmt_out.i_codec != VLC_FOURCC('t','h','e','o') &&
618 /* Allocate the memory needed to store the decoder's structure */
619 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
621 p_enc->p_sys = p_sys;
623 p_enc->pf_encode_video = Encode;
624 p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
625 p_enc->fmt_out.i_codec = VLC_FOURCC('t','h','e','o');
627 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
629 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
630 i_quality = val.i_int;
631 if( i_quality > 10 ) i_quality = 10;
632 if( i_quality < 0 ) i_quality = 0;
634 theora_info_init( &p_sys->ti );
636 p_sys->ti.width = p_enc->fmt_in.video.i_width;
637 p_sys->ti.height = p_enc->fmt_in.video.i_height;
639 if( p_sys->ti.width % 16 || p_sys->ti.height % 16 )
641 /* Pictures from the transcoder should always have a pitch
642 * which is a multiple of 16 */
643 p_sys->ti.width = (p_sys->ti.width + 15) >> 4 << 4;
644 p_sys->ti.height = (p_sys->ti.height + 15) >> 4 << 4;
646 msg_Dbg( p_enc, "padding video from %dx%d to %dx%d",
647 p_enc->fmt_in.video.i_width, p_enc->fmt_in.video.i_height,
648 p_sys->ti.width, p_sys->ti.height );
651 p_sys->ti.frame_width = p_enc->fmt_in.video.i_width;
652 p_sys->ti.frame_height = p_enc->fmt_in.video.i_height;
653 p_sys->ti.offset_x = 0 /*frame_x_offset*/;
654 p_sys->ti.offset_y = 0 /*frame_y_offset*/;
656 p_sys->i_width = p_sys->ti.width;
657 p_sys->i_height = p_sys->ti.height;
659 if( !p_enc->fmt_in.video.i_frame_rate ||
660 !p_enc->fmt_in.video.i_frame_rate_base )
662 p_sys->ti.fps_numerator = 25;
663 p_sys->ti.fps_denominator = 1;
667 p_sys->ti.fps_numerator = p_enc->fmt_in.video.i_frame_rate;
668 p_sys->ti.fps_denominator = p_enc->fmt_in.video.i_frame_rate_base;
671 if( p_enc->fmt_in.video.i_aspect )
673 uint64_t i_num, i_den;
674 unsigned i_dst_num, i_dst_den;
676 i_num = p_enc->fmt_in.video.i_aspect * (int64_t)p_sys->ti.height;
677 i_den = VOUT_ASPECT_FACTOR * p_sys->ti.width;
678 vlc_ureduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );
679 p_sys->ti.aspect_numerator = i_dst_num;
680 p_sys->ti.aspect_denominator = i_dst_den;
684 p_sys->ti.aspect_numerator = 4;
685 p_sys->ti.aspect_denominator = 3;
688 p_sys->ti.target_bitrate = p_enc->fmt_out.i_bitrate;
689 p_sys->ti.quality = ((float)i_quality) * 6.3;
691 p_sys->ti.dropframes_p = 0;
692 p_sys->ti.quick_p = 1;
693 p_sys->ti.keyframe_auto_p = 1;
694 p_sys->ti.keyframe_frequency = 64;
695 p_sys->ti.keyframe_frequency_force = 64;
696 p_sys->ti.keyframe_data_target_bitrate = p_enc->fmt_out.i_bitrate * 1.5;
697 p_sys->ti.keyframe_auto_threshold = 80;
698 p_sys->ti.keyframe_mindistance = 8;
699 p_sys->ti.noise_sensitivity = 1;
701 theora_encode_init( &p_sys->td, &p_sys->ti );
702 theora_info_clear( &p_sys->ti );
703 theora_comment_init( &p_sys->tc );
705 /* Create and store headers */
706 p_enc->fmt_out.i_extra = 3 * 2;
707 for( i = 0; i < 3; i++ )
709 if( i == 0 ) theora_encode_header( &p_sys->td, &header );
710 else if( i == 1 ) theora_encode_comment( &p_sys->tc, &header );
711 else if( i == 2 ) theora_encode_tables( &p_sys->td, &header );
713 p_enc->fmt_out.p_extra =
714 realloc( p_enc->fmt_out.p_extra,
715 p_enc->fmt_out.i_extra + header.bytes );
716 p_extra = p_enc->fmt_out.p_extra;
717 p_extra += p_enc->fmt_out.i_extra + (i-3)*2;
718 p_enc->fmt_out.i_extra += header.bytes;
720 *(p_extra++) = header.bytes >> 8;
721 *(p_extra++) = header.bytes & 0xFF;
723 memcpy( p_extra, header.packet, header.bytes );
729 /****************************************************************************
730 * Encode: the whole thing
731 ****************************************************************************
732 * This function spits out ogg packets.
733 ****************************************************************************/
734 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
736 encoder_sys_t *p_sys = p_enc->p_sys;
737 ogg_packet oggpacket;
743 if( p_pict->p[0].i_pitch < (int)p_sys->i_width ||
744 p_pict->p[0].i_lines < (int)p_sys->i_height )
746 msg_Warn( p_enc, "frame is smaller than encoding size"
747 "(%ix%i->%ix%i) -> dropping frame",
748 p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
749 p_sys->i_width, p_sys->i_height );
754 if( p_pict->p[0].i_visible_pitch < (int)p_sys->i_width )
756 for( i = 0; i < p_sys->i_height; i++ )
758 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
759 p_pict->p[0].i_visible_pitch,
760 *( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
761 p_pict->p[0].i_visible_pitch - 1 ),
762 p_sys->i_width - p_pict->p[0].i_visible_pitch );
764 for( i = 0; i < p_sys->i_height / 2; i++ )
766 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
767 p_pict->p[1].i_visible_pitch,
768 *( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
769 p_pict->p[1].i_visible_pitch - 1 ),
770 p_sys->i_width / 2 - p_pict->p[1].i_visible_pitch );
771 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
772 p_pict->p[2].i_visible_pitch,
773 *( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
774 p_pict->p[2].i_visible_pitch - 1 ),
775 p_sys->i_width / 2 - p_pict->p[2].i_visible_pitch );
779 if( p_pict->p[0].i_visible_lines < (int)p_sys->i_height )
781 for( i = p_pict->p[0].i_visible_lines; i < p_sys->i_height; i++ )
783 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch, 0,
786 for( i = p_pict->p[1].i_visible_lines; i < p_sys->i_height / 2; i++ )
788 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch, 0x80,
789 p_sys->i_width / 2 );
790 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch, 0x80,
791 p_sys->i_width / 2 );
795 /* Theora is a one-frame-in, one-frame-out system. Submit a frame
796 * for compression and pull out the packet. */
798 yuv.y_width = p_sys->i_width;
799 yuv.y_height = p_sys->i_height;
800 yuv.y_stride = p_pict->p[0].i_pitch;
802 yuv.uv_width = p_sys->i_width / 2;
803 yuv.uv_height = p_sys->i_height / 2;
804 yuv.uv_stride = p_pict->p[1].i_pitch;
806 yuv.y = p_pict->p[0].p_pixels;
807 yuv.u = p_pict->p[1].p_pixels;
808 yuv.v = p_pict->p[2].p_pixels;
810 if( theora_encode_YUVin( &p_sys->td, &yuv ) < 0 )
812 msg_Warn( p_enc, "failed encoding a frame" );
816 theora_encode_packetout( &p_sys->td, 0, &oggpacket );
818 /* Ogg packet to block */
819 p_block = block_New( p_enc, oggpacket.bytes );
820 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
821 p_block->i_dts = p_block->i_pts = p_pict->date;
826 /*****************************************************************************
827 * CloseEncoder: theora encoder destruction
828 *****************************************************************************/
829 static void CloseEncoder( vlc_object_t *p_this )
831 encoder_t *p_enc = (encoder_t *)p_this;
832 encoder_sys_t *p_sys = p_enc->p_sys;
834 theora_info_clear( &p_sys->ti );
835 theora_comment_clear( &p_sys->tc );