1 /*****************************************************************************
2 * dirac.c: Dirac decoder/encoder module making use of libdirac.
3 * (http://www.bbc.co.uk/rd/projects/dirac/index.shtml)
4 *****************************************************************************
5 * Copyright (C) 1999-2001 the VideoLAN team
8 * Authors: Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 #include <vlc/decoder.h>
32 #include <libdirac_decoder/dirac_parser.h>
33 #include <libdirac_encoder/dirac_encoder.h>
35 /*****************************************************************************
36 * decoder_sys_t : theora decoder descriptor
37 *****************************************************************************/
43 dirac_decoder_t *p_dirac;
46 /*****************************************************************************
48 *****************************************************************************/
49 static int OpenDecoder ( vlc_object_t * );
50 static void CloseDecoder ( vlc_object_t * );
51 static picture_t *DecodeBlock ( decoder_t *p_dec, block_t **pp_block );
53 static int OpenEncoder( vlc_object_t *p_this );
54 static void CloseEncoder( vlc_object_t *p_this );
55 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
57 #define ENC_CFG_PREFIX "sout-dirac-"
59 static const char *ppsz_enc_options[] = {
63 /*****************************************************************************
65 *****************************************************************************/
66 #define ENC_QUALITY_TEXT N_("Encoding quality")
67 #define ENC_QUALITY_LONGTEXT N_( \
68 "Quality of the encoding between 1.0 (low) and 10.0 (high)." )
71 set_category( CAT_INPUT );
72 set_subcategory( SUBCAT_INPUT_VCODEC );
73 set_description( _("Dirac video decoder") );
74 set_capability( "decoder", 100 );
75 set_callbacks( OpenDecoder, CloseDecoder );
76 add_shortcut( "dirac" );
79 set_description( _("Dirac video encoder") );
80 set_capability( "encoder", 100 );
81 set_callbacks( OpenEncoder, CloseEncoder );
82 add_shortcut( "dirac" );
83 add_float( ENC_CFG_PREFIX "quality", 7.0, NULL, ENC_QUALITY_TEXT,
84 ENC_QUALITY_LONGTEXT, VLC_FALSE );
88 /*****************************************************************************
89 * OpenDecoder: probe the decoder and return score
90 *****************************************************************************/
91 static int OpenDecoder( vlc_object_t *p_this )
93 decoder_t *p_dec = (decoder_t*)p_this;
95 dirac_decoder_t *p_dirac;
97 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','r','a','c') )
102 /* Initialise the dirac decoder */
103 if( !(p_dirac = dirac_decoder_init(0)) ) return VLC_EGENERIC;
105 /* Allocate the memory needed to store the decoder's structure */
106 if( ( p_dec->p_sys = p_sys =
107 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
109 msg_Err( p_dec, "out of memory" );
113 p_sys->p_dirac = p_dirac;
115 /* Set output properties */
116 p_dec->fmt_out.i_cat = VIDEO_ES;
117 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
120 p_dec->pf_decode_video = DecodeBlock;
125 static void FreeFrameBuffer( dirac_decoder_t *p_dirac )
130 for( i = 0; i < 3; i++ )
132 if( p_dirac->fbuf->buf[i] ) free( p_dirac->fbuf->buf[i] );
133 p_dirac->fbuf->buf[i] = 0;
138 /*****************************************************************************
139 * GetNewPicture: Get a new picture from the vout and copy the decoder output
140 *****************************************************************************/
141 static picture_t *GetNewPicture( decoder_t *p_dec )
143 decoder_sys_t *p_sys = p_dec->p_sys;
147 p_dec->fmt_out.i_codec =
148 p_sys->p_dirac->seq_params.chroma == format411 ?
149 VLC_FOURCC('I','4','1','1') :
150 p_sys->p_dirac->seq_params.chroma == format420 ?
151 VLC_FOURCC('I','4','2','0') :
152 p_sys->p_dirac->seq_params.chroma == format422 ?
153 VLC_FOURCC('I','4','2','2') : 0;
155 p_dec->fmt_out.video.i_visible_width =
156 p_dec->fmt_out.video.i_width = p_sys->p_dirac->seq_params.width;
157 p_dec->fmt_out.video.i_visible_height =
158 p_dec->fmt_out.video.i_height = p_sys->p_dirac->seq_params.height;
159 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
161 p_dec->fmt_out.video.i_frame_rate =
162 p_sys->p_dirac->seq_params.frame_rate.numerator;
163 p_dec->fmt_out.video.i_frame_rate_base =
164 p_sys->p_dirac->seq_params.frame_rate.denominator;
166 /* Get a new picture */
167 p_pic = p_dec->pf_vout_buffer_new( p_dec );
169 if( p_pic == NULL ) return NULL;
171 p_pic->b_progressive = !p_sys->p_dirac->seq_params.interlace;
172 p_pic->b_top_field_first = p_sys->p_dirac->seq_params.topfieldfirst;
173 p_pic->i_nb_fields = 2;
175 /* Copy picture stride by stride */
176 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
178 int i_line, i_width, i_dst_stride;
179 uint8_t *p_src = p_sys->p_dirac->fbuf->buf[i_plane];
180 uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
182 i_width = p_pic->p[i_plane].i_visible_pitch;
183 i_dst_stride = p_pic->p[i_plane].i_pitch;
185 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
187 p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
189 p_dst += i_dst_stride;
196 /*****************************************************************************
197 * CloseDecoder: decoder destruction
198 *****************************************************************************/
199 static void CloseDecoder( vlc_object_t *p_this )
201 decoder_t *p_dec = (decoder_t *)p_this;
202 decoder_sys_t *p_sys = p_dec->p_sys;
204 FreeFrameBuffer( p_sys->p_dirac );
205 dirac_decoder_close( p_sys->p_dirac );
209 /****************************************************************************
210 * DecodeBlock: the whole thing
211 ****************************************************************************
212 * This function must be fed with complete frames.
213 ****************************************************************************/
214 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
216 decoder_sys_t *p_sys = p_dec->p_sys;
217 dirac_decoder_state_t state;
221 if( !pp_block || !*pp_block ) return NULL;
227 state = dirac_parse( p_sys->p_dirac );
232 if( !p_block->i_buffer )
234 block_Release( p_block );
238 msg_Dbg( p_dec, "STATE_BUFFER" );
239 dirac_buffer( p_sys->p_dirac, p_block->p_buffer,
240 p_block->p_buffer + p_block->i_buffer );
242 p_block->i_buffer = 0;
247 /* Initialize video output */
250 msg_Dbg( p_dec, "%dx%d, chroma %i, %f fps",
251 p_sys->p_dirac->seq_params.width,
252 p_sys->p_dirac->seq_params.height,
253 p_sys->p_dirac->seq_params.chroma,
254 (float)p_sys->p_dirac->seq_params.frame_rate.numerator/
255 p_sys->p_dirac->seq_params.frame_rate.denominator );
257 FreeFrameBuffer( p_sys->p_dirac );
258 buf[0] = malloc( p_sys->p_dirac->seq_params.width *
259 p_sys->p_dirac->seq_params.height );
260 buf[1] = malloc( p_sys->p_dirac->seq_params.chroma_width *
261 p_sys->p_dirac->seq_params.chroma_height );
262 buf[2] = malloc( p_sys->p_dirac->seq_params.chroma_width *
263 p_sys->p_dirac->seq_params.chroma_height );
265 dirac_set_buf( p_sys->p_dirac, buf, NULL );
269 case STATE_SEQUENCE_END:
270 msg_Dbg( p_dec, "SEQUENCE_END" );
271 FreeFrameBuffer( p_sys->p_dirac );
274 case STATE_PICTURE_START:
275 msg_Dbg( p_dec, "PICTURE_START: frame_type=%i frame_num=%d",
276 p_sys->p_dirac->frame_params.ftype,
277 p_sys->p_dirac->frame_params.fnum );
280 case STATE_PICTURE_AVAIL:
281 msg_Dbg( p_dec, "PICTURE_AVAI : frame_type=%i frame_num=%d",
282 p_sys->p_dirac->frame_params.ftype,
283 p_sys->p_dirac->frame_params.fnum );
285 /* Picture available for display */
286 p_pic = GetNewPicture( p_dec );
287 p_pic->date = p_block->i_pts > 0 ? p_block->i_pts : p_block->i_dts;
288 p_pic->b_force = 1; // HACK
293 msg_Dbg( p_dec, "STATE_INVALID" );
305 /*****************************************************************************
306 * encoder_sys_t : dirac encoder descriptor
307 *****************************************************************************/
308 #define ENC_BUFSIZE 1024*1024
314 dirac_encoder_t *p_dirac;
315 dirac_encoder_context_t ctx;
317 uint8_t *p_buffer_in;
320 uint8_t p_buffer_out[ENC_BUFSIZE];
323 /*****************************************************************************
324 * OpenEncoder: probe the encoder and return score
325 *****************************************************************************/
326 static int OpenEncoder( vlc_object_t *p_this )
328 encoder_t *p_enc = (encoder_t *)p_this;
329 encoder_sys_t *p_sys = p_enc->p_sys;
333 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','r','a','c') &&
339 /* Allocate the memory needed to store the decoder's structure */
340 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
342 msg_Err( p_enc, "out of memory" );
345 memset( p_sys, 0, sizeof(encoder_sys_t) );
346 p_enc->p_sys = p_sys;
348 p_enc->pf_encode_video = Encode;
349 p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
350 p_enc->fmt_in.video.i_bits_per_pixel = 12;
351 p_enc->fmt_out.i_codec = VLC_FOURCC('d','r','a','c');
353 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
355 /* Initialse the encoder context with the presets for SD576 - Standard
356 * Definition Digital (some parameters will be overwritten later on) */
357 dirac_encoder_context_init( &p_sys->ctx, SD576 );
359 /* Override parameters if required */
360 p_sys->ctx.seq_params.width = p_enc->fmt_in.video.i_width;
361 p_sys->ctx.seq_params.height = p_enc->fmt_in.video.i_height;
362 p_sys->ctx.seq_params.chroma = format420;
363 p_sys->ctx.seq_params.frame_rate.numerator =
364 p_enc->fmt_in.video.i_frame_rate;
365 p_sys->ctx.seq_params.frame_rate.denominator =
366 p_enc->fmt_in.video.i_frame_rate_base;
367 p_sys->ctx.seq_params.interlace = 0;
368 p_sys->ctx.seq_params.topfieldfirst = 0;
370 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
371 f_quality = val.f_float;
372 if( f_quality > 10 ) f_quality = 10;
373 if( f_quality < 1 ) f_quality = 1;
374 p_sys->ctx.enc_params.qf = f_quality;
376 /* Initialise the encoder with the encoder context */
377 p_sys->p_dirac = dirac_encoder_init( &p_sys->ctx, 0 );
379 /* Set the buffer size for the encoded picture */
380 p_sys->i_buffer_in = p_enc->fmt_in.video.i_width *
381 p_enc->fmt_in.video.i_height * 3 / 2;
382 p_sys->p_buffer_in = malloc( p_sys->i_buffer_in );
387 /****************************************************************************
388 * Encode: the whole thing
389 ****************************************************************************
390 * This function spits out ogg packets.
391 ****************************************************************************/
392 static block_t *Encode( encoder_t *p_enc, picture_t *p_pic )
394 encoder_sys_t *p_sys = p_enc->p_sys;
395 block_t *p_block, *p_chain = NULL;
396 int i_plane, i_line, i_width, i_src_stride;
399 /* Copy input picture in encoder input buffer (stride by stride) */
400 p_dst = p_sys->p_buffer_in;
401 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
403 uint8_t *p_src = p_pic->p[i_plane].p_pixels;
404 i_width = p_pic->p[i_plane].i_visible_pitch;
405 i_src_stride = p_pic->p[i_plane].i_pitch;
407 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
409 p_enc->p_libvlc->pf_memcpy( p_dst, p_src, i_width );
411 p_src += i_src_stride;
415 /* Load one frame of data into encoder */
416 if( dirac_encoder_load( p_sys->p_dirac, p_sys->p_buffer_in,
417 p_sys->i_buffer_in ) >= 0 )
419 dirac_encoder_state_t state;
421 msg_Dbg( p_enc, "dirac_encoder_load" );
423 /* Retrieve encoded frames from encoder */
426 p_sys->p_dirac->enc_buf.buffer = p_sys->p_buffer_out;
427 p_sys->p_dirac->enc_buf.size = ENC_BUFSIZE;
428 state = dirac_encoder_output( p_sys->p_dirac );
429 msg_Dbg( p_enc, "dirac_encoder_output: %i", state );
432 case ENC_STATE_AVAIL:
433 // Encoded frame available in encoder->enc_buf
434 // Encoded frame params available in enccoder->enc_fparams
435 // Encoded frame stats available in enccoder->enc_fstats
436 p_block = block_New( p_enc, p_sys->p_dirac->enc_buf.size );
437 memcpy( p_block->p_buffer, p_sys->p_dirac->enc_buf.buffer,
438 p_sys->p_dirac->enc_buf.size );
439 p_block->i_dts = p_block->i_pts = p_pic->date;
440 block_ChainAppend( &p_chain, p_block );
443 case ENC_STATE_BUFFER:
445 case ENC_STATE_INVALID:
449 if( p_sys->p_dirac->decoded_frame_avail )
451 //locally decoded frame is available in
453 //locally decoded frame parameters available
454 //in encoder->dec_fparams
456 if( p_sys->p_dirac->instr_data_avail )
458 //Instrumentation data (motion vectors etc.)
459 //available in encoder->instr
462 } while( state == ENC_STATE_AVAIL );
466 msg_Dbg( p_enc, "dirac_encoder_load() error" );
472 /*****************************************************************************
473 * CloseEncoder: dirac encoder destruction
474 *****************************************************************************/
475 static void CloseEncoder( vlc_object_t *p_this )
477 encoder_t *p_enc = (encoder_t *)p_this;
478 encoder_sys_t *p_sys = p_enc->p_sys;
480 msg_Dbg( p_enc, "resulting bit-rate: %i bits/sec",
481 p_sys->p_dirac->enc_seqstats.bit_rate );
483 /* Free the encoder resources */
484 dirac_encoder_close( p_sys->p_dirac );
486 free( p_sys->p_buffer_in );