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>
36 /*****************************************************************************
37 * decoder_sys_t : raw video decoder descriptor
38 *****************************************************************************/
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 )
111 case VLC_CODEC_RGB32:
112 case VLC_CODEC_RGB24:
113 case VLC_CODEC_RGB16:
114 case VLC_CODEC_RGB15:
123 /* Allocate the memory needed to store the decoder's structure */
124 if( ( p_dec->p_sys = p_sys =
125 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
128 p_dec->p_sys->b_packetizer = false;
131 if( (int)p_dec->fmt_in.video.i_height < 0 )
133 /* Frames are coded from bottom to top */
134 p_dec->fmt_in.video.i_height =
135 (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
136 p_sys->b_invert = true;
139 if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
141 msg_Err( p_dec, "invalid display size %dx%d",
142 p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
146 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
148 date_Init( &p_sys->pts, p_dec->fmt_out.video.i_frame_rate,
149 p_dec->fmt_out.video.i_frame_rate_base );
150 if( p_dec->fmt_out.video.i_frame_rate == 0 ||
151 p_dec->fmt_out.video.i_frame_rate_base == 0)
153 msg_Warn( p_dec, "invalid frame rate %d/%d, using 25 fps instead",
154 p_dec->fmt_out.video.i_frame_rate,
155 p_dec->fmt_out.video.i_frame_rate_base);
156 date_Init( &p_sys->pts, 25, 1 );
159 /* Find out p_vdec->i_raw_size */
160 vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
161 p_dec->fmt_in.video.i_width,
162 p_dec->fmt_in.video.i_height,
163 p_dec->fmt_in.video.i_aspect );
164 p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
165 p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
167 if( !p_dec->fmt_in.video.i_aspect )
169 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
170 p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
174 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
176 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
182 static int OpenPacketizer( vlc_object_t *p_this )
184 decoder_t *p_dec = (decoder_t*)p_this;
186 int i_ret = OpenDecoder( p_this );
188 if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
193 /****************************************************************************
194 * DecodeBlock: the whole thing
195 ****************************************************************************
196 * This function must be fed with complete frames.
197 ****************************************************************************/
198 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
200 decoder_sys_t *p_sys = p_dec->p_sys;
204 if( !pp_block || !*pp_block ) return NULL;
209 if( !p_block->i_pts && !p_block->i_dts && !date_Get( &p_sys->pts ) )
211 /* We've just started the stream, wait for the first PTS. */
212 block_Release( p_block );
216 /* Date management: If there is a pts avaliable, use that. */
219 date_Set( &p_sys->pts, p_block->i_pts );
221 else if( p_block->i_dts )
223 /* NB, davidf doesn't quite agree with this in general, it is ok
224 * for rawvideo since it is in order (ie pts=dts), however, it
225 * may not be ok for an out-of-order codec, so don't copy this
226 * without thinking */
227 date_Set( &p_sys->pts, p_block->i_dts );
230 if( p_block->i_buffer < p_sys->i_raw_size )
232 msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
233 p_block->i_buffer, p_sys->i_raw_size );
235 block_Release( p_block );
239 if( p_sys->b_packetizer )
241 p_buf = SendFrame( p_dec, p_block );
245 p_buf = DecodeFrame( p_dec, p_block );
248 /* Date management: 1 frame per packet */
249 date_Increment( &p_sys->pts, 1 );
255 /*****************************************************************************
257 *****************************************************************************/
258 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
261 decoder_sys_t *p_sys = p_dec->p_sys;
262 uint8_t *p_src = p_block->p_buffer;
264 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
266 int i_pitch = p_pic->p[i_plane].i_pitch;
267 int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
268 int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
269 uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
270 uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
272 if( p_sys->b_invert )
273 for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
274 p_dst_end -= i_pitch, p_src += i_visible_pitch )
275 vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
277 for( ; p_dst < p_dst_end;
278 p_dst += i_pitch, p_src += i_visible_pitch )
279 vlc_memcpy( p_dst, p_src, i_visible_pitch );
283 /*****************************************************************************
284 * DecodeFrame: decodes a video frame.
285 *****************************************************************************/
286 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
288 decoder_sys_t *p_sys = p_dec->p_sys;
291 /* Get a new picture */
292 p_pic = decoder_NewPicture( p_dec );
295 block_Release( p_block );
299 FillPicture( p_dec, p_block, p_pic );
301 p_pic->date = date_Get( &p_sys->pts );
302 p_pic->b_progressive = true;
304 block_Release( p_block );
308 /*****************************************************************************
309 * SendFrame: send a video frame to the stream output.
310 *****************************************************************************/
311 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
313 decoder_sys_t *p_sys = p_dec->p_sys;
315 p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
317 if( p_sys->b_invert )
320 uint8_t *p_tmp, *p_pixels;
323 /* Fill in picture_t fields */
324 vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
325 p_dec->fmt_out.video.i_width,
326 p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
330 msg_Err( p_dec, "unsupported chroma" );
334 p_tmp = malloc( pic.p[0].i_pitch );
337 p_pixels = p_block->p_buffer;
338 for( i = 0; i < pic.i_planes; i++ )
340 int i_pitch = pic.p[i].i_pitch;
341 uint8_t *p_top = p_pixels;
342 uint8_t *p_bottom = p_pixels + i_pitch *
343 (pic.p[i].i_visible_lines - 1);
345 for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
347 vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch );
348 vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch );
349 vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch );
354 p_pixels += i_pitch * pic.p[i].i_lines;
362 /*****************************************************************************
363 * CloseDecoder: decoder destruction
364 *****************************************************************************/
365 static void CloseDecoder( vlc_object_t *p_this )
367 decoder_t *p_dec = (decoder_t*)p_this;
368 free( p_dec->p_sys );