1 /*****************************************************************************
2 * rawvideo.c: Pseudo video decoder/packetizer for raw video data
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <vlc/decoder.h>
31 /*****************************************************************************
32 * decoder_sys_t : raw video decoder descriptor
33 *****************************************************************************/
37 vlc_bool_t b_packetizer;
52 /****************************************************************************
54 ****************************************************************************/
55 static int OpenDecoder ( vlc_object_t * );
56 static int OpenPacketizer( vlc_object_t * );
57 static void CloseDecoder ( vlc_object_t * );
59 static void *DecodeBlock ( decoder_t *, block_t ** );
61 static picture_t *DecodeFrame( decoder_t *, block_t * );
62 static block_t *SendFrame ( decoder_t *, block_t * );
64 /*****************************************************************************
66 *****************************************************************************/
68 set_description( _("Pseudo raw video decoder") );
69 set_capability( "decoder", 50 );
70 set_callbacks( OpenDecoder, CloseDecoder );
73 set_description( _("Pseudo raw video packetizer") );
74 set_capability( "packetizer", 100 );
75 set_callbacks( OpenPacketizer, CloseDecoder );
78 /*****************************************************************************
79 * OpenDecoder: probe the decoder and return score
80 *****************************************************************************/
81 static int OpenDecoder( vlc_object_t *p_this )
83 decoder_t *p_dec = (decoder_t*)p_this;
86 switch( p_dec->fmt_in.i_codec )
89 case VLC_FOURCC('I','4','4','4'):
90 case VLC_FOURCC('I','4','2','2'):
91 case VLC_FOURCC('I','4','2','0'):
92 case VLC_FOURCC('Y','V','1','2'):
93 case VLC_FOURCC('I','Y','U','V'):
94 case VLC_FOURCC('I','4','1','1'):
95 case VLC_FOURCC('I','4','1','0'):
96 case VLC_FOURCC('Y','V','U','9'):
99 case VLC_FOURCC('Y','U','Y','2'):
100 case VLC_FOURCC('U','Y','V','Y'):
103 case VLC_FOURCC('R','V','3','2'):
104 case VLC_FOURCC('R','V','2','4'):
105 case VLC_FOURCC('R','V','1','6'):
106 case VLC_FOURCC('R','V','1','5'):
113 /* Allocate the memory needed to store the decoder's structure */
114 if( ( p_dec->p_sys = p_sys =
115 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
117 msg_Err( p_dec, "out of memory" );
121 p_dec->p_sys->b_packetizer = VLC_FALSE;
125 if( (int)p_dec->fmt_in.video.i_height < 0 )
127 /* Frames are coded from bottom to top */
128 p_dec->fmt_in.video.i_height =
129 (unsigned int)(-(int)p_dec->fmt_in.video.i_height);
130 p_sys->b_invert = VLC_TRUE;
133 if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
135 msg_Err( p_dec, "invalid display size %dx%d",
136 p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
140 /* Find out p_vdec->i_raw_size */
141 vout_InitFormat( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
142 p_dec->fmt_in.video.i_width,
143 p_dec->fmt_in.video.i_height,
144 p_dec->fmt_in.video.i_aspect );
145 p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
146 p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
148 /* Set output properties */
149 p_dec->fmt_out.i_cat = VIDEO_ES;
150 p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
151 if( !p_dec->fmt_in.video.i_aspect )
153 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
154 p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
156 else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
158 if( p_dec->fmt_in.video.i_rmask )
159 p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
160 if( p_dec->fmt_in.video.i_gmask )
161 p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
162 if( p_dec->fmt_in.video.i_bmask )
163 p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
166 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
168 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
174 static int OpenPacketizer( vlc_object_t *p_this )
176 decoder_t *p_dec = (decoder_t*)p_this;
178 int i_ret = OpenDecoder( p_this );
180 if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = VLC_TRUE;
185 /****************************************************************************
186 * DecodeBlock: the whole thing
187 ****************************************************************************
188 * This function must be fed with complete frames.
189 ****************************************************************************/
190 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
192 decoder_sys_t *p_sys = p_dec->p_sys;
196 if( !pp_block || !*pp_block ) return NULL;
200 if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
202 /* We've just started the stream, wait for the first PTS. */
203 block_Release( p_block );
207 /* Date management */
208 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
210 if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
211 else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
214 if( p_block->i_buffer < p_sys->i_raw_size )
216 msg_Warn( p_dec, "invalid frame size (%d < %d)",
217 p_block->i_buffer, p_sys->i_raw_size );
219 block_Release( p_block );
223 if( p_sys->b_packetizer )
225 p_buf = SendFrame( p_dec, p_block );
229 p_buf = DecodeFrame( p_dec, p_block );
232 /* Date management: 1 frame per packet */
233 p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
239 /*****************************************************************************
241 *****************************************************************************/
242 static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
244 uint8_t *p_src, *p_dst;
245 int i_src, i_plane, i_line, i_width;
246 decoder_sys_t *p_sys = p_dec->p_sys;
248 p_src = p_block->p_buffer;
249 i_src = p_block->i_buffer;
251 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
253 p_dst = p_pic->p[i_plane].p_pixels;
254 i_width = p_pic->p[i_plane].i_visible_pitch;
256 if( p_sys->b_invert )
257 p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
259 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
261 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
262 p_src += p_sys->b_invert ? -i_width : i_width;
263 p_dst += p_pic->p[i_plane].i_pitch;
266 if( p_sys->b_invert )
267 p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
271 /*****************************************************************************
272 * DecodeFrame: decodes a video frame.
273 *****************************************************************************/
274 static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
276 decoder_sys_t *p_sys = p_dec->p_sys;
279 /* Get a new picture */
280 p_pic = p_dec->pf_vout_buffer_new( p_dec );
283 block_Release( p_block );
287 FillPicture( p_dec, p_block, p_pic );
289 p_pic->date = p_sys->i_pts;
291 block_Release( p_block );
295 /*****************************************************************************
296 * SendFrame: send a video frame to the stream output.
297 *****************************************************************************/
298 static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
300 decoder_sys_t *p_sys = p_dec->p_sys;
302 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
304 if( p_sys->b_invert )
307 uint8_t *p_tmp, *p_pixels;
310 /* Fill in picture_t fields */
311 vout_InitPicture( VLC_OBJECT(p_dec), &pic, p_dec->fmt_out.i_codec,
312 p_dec->fmt_out.video.i_width,
313 p_dec->fmt_out.video.i_height, VOUT_ASPECT_FACTOR );
317 msg_Err( p_dec, "unsupported chroma" );
321 p_tmp = malloc( pic.p[0].i_visible_pitch );
322 p_pixels = p_block->p_buffer;
323 for( i = 0; i < pic.i_planes; i++ )
325 int i_pitch = pic.p[i].i_visible_pitch;
326 uint8_t *p_top = p_pixels;
327 uint8_t *p_bottom = p_pixels + i_pitch *
328 (pic.p[i].i_visible_lines - 1);
330 for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
332 p_dec->p_vlc->pf_memcpy( p_tmp, p_bottom,
333 pic.p[i].i_visible_pitch );
334 p_dec->p_vlc->pf_memcpy( p_bottom, p_top,
335 pic.p[i].i_visible_pitch );
336 p_dec->p_vlc->pf_memcpy( p_top, p_tmp,
337 pic.p[i].i_visible_pitch );
342 p_pixels += i_pitch * pic.p[i].i_lines;
350 /*****************************************************************************
351 * CloseDecoder: decoder destruction
352 *****************************************************************************/
353 static void CloseDecoder( vlc_object_t *p_this )
355 decoder_t *p_dec = (decoder_t*)p_this;
356 free( p_dec->p_sys );