1 /*****************************************************************************
2 * mash.cpp: Video decoder using openmash codec implementations
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
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>
34 #include <vlc_block.h>
38 /*****************************************************************************
39 * decoder_sys_t : video decoder descriptor
40 *****************************************************************************/
47 IntraP64Decoder *p_decoder;
53 /****************************************************************************
55 ****************************************************************************/
56 static int OpenDecoder ( vlc_object_t * );
57 static void CloseDecoder ( vlc_object_t * );
59 static void *DecodeBlock ( decoder_t *, block_t ** );
62 static picture_t *DecodeFrame( decoder_t *, block_t * );
63 static block_t *SendFrame ( decoder_t *, block_t * );
66 /*****************************************************************************
68 *****************************************************************************/
70 set_description( N_("Video decoder using openmash") )
71 set_capability( "decoder", 50 )
72 set_category( CAT_INPUT )
73 set_subcategory( SUBCAT_INPUT_VCODEC )
74 set_callbacks( OpenDecoder, CloseDecoder )
77 /*****************************************************************************
78 * OpenDecoder: probe the decoder and return score
79 *****************************************************************************/
80 static int OpenDecoder( vlc_object_t *p_this )
82 decoder_t *p_dec = (decoder_t*)p_this;
85 switch( p_dec->fmt_in.i_codec )
95 /* Allocate the memory needed to store the decoder's structure */
96 if( ( p_dec->p_sys = p_sys =
97 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
100 p_sys->i_pts = VLC_TS_INVALID;
101 p_sys->b_inited = false;
102 p_sys->i_counter = 0;
104 /* Set output properties */
105 p_dec->fmt_out.i_cat = VIDEO_ES;
106 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
109 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
111 p_sys->p_decoder = new IntraP64Decoder();
117 /*****************************************************************************
118 * CloseDecoder: decoder destruction
119 *****************************************************************************/
120 static void CloseDecoder( vlc_object_t *p_this )
122 decoder_t *p_dec = (decoder_t*)p_this;
123 free( p_dec->p_sys );
127 /****************************************************************************
128 * DecodeBlock: the whole thing
129 ****************************************************************************
130 * This function must be fed with complete frames.
131 ****************************************************************************/
132 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
134 decoder_sys_t *p_sys = p_dec->p_sys;
137 uint32_t i_video_header;
139 int cc, sbit, ebit, mba, gob, quant, mvdh, mvdv;
140 int i_width, i_height;
142 if( !pp_block || !*pp_block ) return NULL;
146 if( p_sys->i_pts <= VLC_TS_INVALID && p_block->i_pts <= VLC_TS_INVALID &&
147 p_block->i_dts <= VLC_TS_INVALID )
149 /* We've just started the stream, wait for the first PTS. */
150 block_Release( p_block );
155 /* Date management */
156 if( p_block->i_pts > VLC_TS_INVALID )
157 p_sys->i_pts = p_block->i_pts;
158 else if( p_block->i_dts > VLC_TS_INVALID )
159 p_sys->i_pts = p_block->i_dts;
161 i_video_header = *(uint32_t*)p_block->p_buffer; /* yes, it is native endian */
162 sbit = i_video_header >> 29; /* start bit position */
163 ebit = (i_video_header >> 26) & 7; /* end bit position */
164 msg_Dbg( p_dec, "sbit, ebit: %d,%d", sbit, ebit );
165 gob = (i_video_header >> 20) & 0xf; /* GOB number */
168 msg_Warn( p_dec, "invalid gob, buggy vic streamer?");
170 mba = (i_video_header >> 15) & 0x1f; /* Macroblock address predictor */
171 quant = (i_video_header >> 10) & 0x1f; /* quantizer */
172 mvdh = (i_video_header >> 5) & 0x1f; /* horizontal motion vector data */
173 mvdv = i_video_header & 0x1f; /* vertical motion vector data */
174 cc = p_block->i_buffer - 4;
175 msg_Dbg( p_dec, "packet size %d", cc );
177 /* Find out p_vdec->i_raw_size */
178 p_sys->p_decoder->decode( p_block->p_buffer + 4 /*bp?*/,
187 i_width = p_sys->p_decoder->width();
188 i_height = p_sys->p_decoder->height();
189 if( !p_sys->b_inited )
191 msg_Dbg( p_dec, "video size is perhaps %dx%d", i_width,
193 video_format_Setup( &p_dec->fmt_out.video, VLC_CODEC_I420,
196 p_sys->b_inited = true;
200 // p_sys->p_decoder->sync();
201 if( p_block->i_flags & BLOCK_FLAG_END_OF_FRAME )
203 p_pic = decoder_NewPicture( p_dec );
206 block_Release( p_block );
209 p_sys->p_decoder->sync();
210 p_sys->i_counter = 0;
211 p_frame = p_sys->p_decoder->frame();
212 vlc_memcpy( p_dec, p_pic->p[0].p_pixels, p_frame, i_width*i_height );
213 p_frame += i_width * i_height;
214 vlc_memcpy( p_dec, p_pic->p[1].p_pixels, p_frame, i_width*i_height/4 );
215 p_frame += i_width * i_height/4;
216 vlc_memcpy( p_dec, p_pic->p[2].p_pixels, p_frame, i_width*i_height/4 );
217 p_pic->date = p_sys->i_pts;
219 block_Release( p_block);