1 /*****************************************************************************
2 * rawvideo.c: Pseudo video decoder/packetizer for raw video data
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 /*****************************************************************************
36 * decoder_sys_t : raw video decoder descriptor
37 *****************************************************************************/
48 plane_t planes[PICTURE_PLANE_MAX];
56 /****************************************************************************
58 ****************************************************************************/
59 static int OpenDecoder ( vlc_object_t * );
60 static int OpenPacketizer( vlc_object_t * );
61 static void CloseDecoder ( vlc_object_t * );
63 static void *DecodeBlock ( decoder_t *, block_t ** );
65 static picture_t *DecodeFrame( decoder_t *, block_t * );
66 static block_t *SendFrame ( decoder_t *, block_t * );
68 /*****************************************************************************
70 *****************************************************************************/
72 set_description( N_("Pseudo raw video decoder") )
73 set_capability( "decoder", 50 )
74 set_category( CAT_INPUT )
75 set_subcategory( SUBCAT_INPUT_VCODEC )
76 set_callbacks( OpenDecoder, CloseDecoder )
79 set_description( N_("Pseudo raw video packetizer") )
80 set_capability( "packetizer", 100 )
81 set_callbacks( OpenPacketizer, CloseDecoder )
84 /*****************************************************************************
85 * OpenDecoder: probe the decoder and return score
86 *****************************************************************************/
87 static int OpenDecoder( vlc_object_t *p_this )
89 decoder_t *p_dec = (decoder_t*)p_this;
92 switch( p_dec->fmt_in.i_codec )
117 case VLC_CODEC_RGB32:
118 case VLC_CODEC_RGB24:
119 case VLC_CODEC_RGB16:
120 case VLC_CODEC_RGB15:
129 /* Allocate the memory needed to store the decoder's structure */
130 if( ( p_dec->p_sys = p_sys =
131 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
134 p_dec->p_sys->b_packetizer = false;
137 if( (int)p_dec->fmt_in.video.i_height < 0 )
139 /* Frames are coded from bottom to top */
140 p_dec->fmt_in.video.i_height =
141 (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
142 p_sys->b_invert = true;
145 if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
147 msg_Err( p_dec, "invalid display size %dx%d",
148 p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
152 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
154 date_Init( &p_sys->pts, p_dec->fmt_out.video.i_frame_rate,
155 p_dec->fmt_out.video.i_frame_rate_base );
156 if( p_dec->fmt_out.video.i_frame_rate == 0 ||
157 p_dec->fmt_out.video.i_frame_rate_base == 0)
159 msg_Warn( p_dec, "invalid frame rate %d/%d, using 25 fps instead",
160 p_dec->fmt_out.video.i_frame_rate,
161 p_dec->fmt_out.video.i_frame_rate_base);
162 date_Init( &p_sys->pts, 25, 1 );
165 /* Find out p_vdec->i_raw_size */
166 video_format_Setup( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
167 p_dec->fmt_in.video.i_width,
168 p_dec->fmt_in.video.i_height,
169 p_dec->fmt_in.video.i_sar_num,
170 p_dec->fmt_in.video.i_sar_den );
172 picture_Setup( &picture, p_dec->fmt_out.i_codec,
173 p_dec->fmt_in.video.i_width,
174 p_dec->fmt_in.video.i_height, 0, 1 );
175 p_sys->i_raw_size = 0;
176 for( int i = 0; i < picture.i_planes; i++ )
178 p_sys->i_raw_size += picture.p[i].i_visible_pitch *
179 picture.p[i].i_visible_lines;
180 p_sys->planes[i] = picture.p[i];
183 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
185 p_dec->fmt_out.video.i_sar_num = 1;
186 p_dec->fmt_out.video.i_sar_den = 1;
190 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
192 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
198 static int OpenPacketizer( vlc_object_t *p_this )
200 decoder_t *p_dec = (decoder_t*)p_this;
202 int i_ret = OpenDecoder( p_this );
204 if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
209 /****************************************************************************
210 * DecodeBlock: the whole thing
211 ****************************************************************************
212 * This function must be fed with complete frames.
213 ****************************************************************************/
214 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
216 decoder_sys_t *p_sys = p_dec->p_sys;
220 if( !pp_block || !*pp_block ) return NULL;
225 if( p_block->i_pts <= VLC_TS_INVALID && p_block->i_dts <= VLC_TS_INVALID &&
226 !date_Get( &p_sys->pts ) )
228 /* We've just started the stream, wait for the first PTS. */
229 block_Release( p_block );
233 /* Date management: If there is a pts avaliable, use that. */
234 if( p_block->i_pts > VLC_TS_INVALID )
236 date_Set( &p_sys->pts, p_block->i_pts );
238 else if( p_block->i_dts > VLC_TS_INVALID )
240 /* NB, davidf doesn't quite agree with this in general, it is ok
241 * for rawvideo since it is in order (ie pts=dts), however, it
242 * may not be ok for an out-of-order codec, so don't copy this
243 * without thinking */
244 date_Set( &p_sys->pts, p_block->i_dts );
247 if( p_block->i_buffer < p_sys->i_raw_size )
249 msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
250 p_block->i_buffer, p_sys->i_raw_size );
252 block_Release( p_block );
256 if( p_sys->b_packetizer )
258 p_buf = SendFrame( p_dec, p_block );
262 p_buf = DecodeFrame( p_dec, p_block );
265 /* Date management: 1 frame per packet */
266 date_Increment( &p_sys->pts, 1 );
272 /*****************************************************************************
274 *****************************************************************************/
275 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
278 decoder_sys_t *p_sys = p_dec->p_sys;
279 uint8_t *p_src = p_block->p_buffer;
281 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
283 int i_pitch = p_pic->p[i_plane].i_pitch;
284 int i_visible_pitch = p_sys->planes[i_plane].i_visible_pitch;
285 int i_visible_lines = p_sys->planes[i_plane].i_visible_lines;
286 uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
287 uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
289 if( p_sys->b_invert )
290 for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
291 p_dst_end -= i_pitch, p_src += i_visible_pitch )
292 vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
294 for( ; p_dst < p_dst_end;
295 p_dst += i_pitch, p_src += i_visible_pitch )
296 vlc_memcpy( p_dst, p_src, i_visible_pitch );
300 /*****************************************************************************
301 * DecodeFrame: decodes a video frame.
302 *****************************************************************************/
303 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
305 decoder_sys_t *p_sys = p_dec->p_sys;
308 /* Get a new picture */
309 p_pic = decoder_NewPicture( p_dec );
312 block_Release( p_block );
316 FillPicture( p_dec, p_block, p_pic );
318 p_pic->date = date_Get( &p_sys->pts );
319 if( p_block->i_flags & BLOCK_FLAG_INTERLACED_MASK )
321 p_pic->b_progressive = false;
322 p_pic->i_nb_fields = 2;
323 if( p_block->i_flags & BLOCK_FLAG_TOP_FIELD_FIRST )
324 p_pic->b_top_field_first = true;
326 p_pic->b_top_field_first = false;
329 p_pic->b_progressive = true;
331 block_Release( p_block );
335 /*****************************************************************************
336 * SendFrame: send a video frame to the stream output.
337 *****************************************************************************/
338 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
340 decoder_sys_t *p_sys = p_dec->p_sys;
342 p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
344 if( p_sys->b_invert )
347 uint8_t *p_tmp, *p_pixels;
350 /* Fill in picture_t fields */
351 picture_Setup( &pic, p_dec->fmt_out.i_codec,
352 p_dec->fmt_out.video.i_width,
353 p_dec->fmt_out.video.i_height, 0, 1 );
357 msg_Err( p_dec, "unsupported chroma" );
361 p_tmp = malloc( pic.p[0].i_pitch );
364 p_pixels = p_block->p_buffer;
365 for( i = 0; i < pic.i_planes; i++ )
367 int i_pitch = pic.p[i].i_pitch;
368 uint8_t *p_top = p_pixels;
369 uint8_t *p_bottom = p_pixels + i_pitch *
370 (pic.p[i].i_visible_lines - 1);
372 for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
374 vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch );
375 vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch );
376 vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch );
381 p_pixels += i_pitch * pic.p[i].i_lines;
389 /*****************************************************************************
390 * CloseDecoder: decoder destruction
391 *****************************************************************************/
392 static void CloseDecoder( vlc_object_t *p_this )
394 decoder_t *p_dec = (decoder_t*)p_this;
395 free( p_dec->p_sys );