1 /*****************************************************************************
2 * mash.c: 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>
35 #include <vlc_block.h>
39 /*****************************************************************************
40 * decoder_sys_t : video decoder descriptor
41 *****************************************************************************/
48 IntraP64Decoder *p_decoder;
54 /****************************************************************************
56 ****************************************************************************/
57 static int OpenDecoder ( vlc_object_t * );
58 static void CloseDecoder ( vlc_object_t * );
60 static void *DecodeBlock ( decoder_t *, block_t ** );
63 static picture_t *DecodeFrame( decoder_t *, block_t * );
64 static block_t *SendFrame ( decoder_t *, block_t * );
67 /*****************************************************************************
69 *****************************************************************************/
71 set_description( N_("Video decoder using openmash") )
72 set_capability( "decoder", 50 )
73 set_category( CAT_INPUT )
74 set_subcategory( SUBCAT_INPUT_VCODEC )
75 set_callbacks( OpenDecoder, 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 )
96 /* Allocate the memory needed to store the decoder's structure */
97 if( ( p_dec->p_sys = p_sys =
98 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
102 p_sys->b_inited = false;
103 p_sys->i_counter = 0;
105 /* Set output properties */
106 p_dec->fmt_out.i_cat = VIDEO_ES;
107 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
110 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
112 p_sys->p_decoder = new IntraP64Decoder();
118 /*****************************************************************************
119 * CloseDecoder: decoder destruction
120 *****************************************************************************/
121 static void CloseDecoder( vlc_object_t *p_this )
123 decoder_t *p_dec = (decoder_t*)p_this;
124 free( p_dec->p_sys );
128 /****************************************************************************
129 * DecodeBlock: the whole thing
130 ****************************************************************************
131 * This function must be fed with complete frames.
132 ****************************************************************************/
133 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
135 decoder_sys_t *p_sys = p_dec->p_sys;
138 uint32_t i_video_header;
140 int cc, sbit, ebit, mba, gob, quant, mvdh, mvdv;
141 int i_width, i_height;
143 if( !pp_block || !*pp_block ) return NULL;
147 if( !p_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
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 > 0 || p_block->i_dts > 0 )
158 if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
159 else if( p_block->i_dts > 0 ) p_sys->i_pts = p_block->i_dts;
162 i_video_header = *(uint32_t*)p_block->p_buffer; /* yes, it is native endian */
163 sbit = i_video_header >> 29; /* start bit position */
164 ebit = (i_video_header >> 26) & 7; /* end bit position */
165 msg_Dbg( p_dec, "sbit, ebit: %d,%d", sbit, ebit );
166 gob = (i_video_header >> 20) & 0xf; /* GOB number */
169 msg_Warn( p_dec, "invalid gob, buggy vic streamer?");
171 mba = (i_video_header >> 15) & 0x1f; /* Macroblock address predictor */
172 quant = (i_video_header >> 10) & 0x1f; /* quantizer */
173 mvdh = (i_video_header >> 5) & 0x1f; /* horizontal motion vector data */
174 mvdv = i_video_header & 0x1f; /* vertical motion vector data */
175 cc = p_block->i_buffer - 4;
176 msg_Dbg( p_dec, "packet size %d", cc );
178 /* Find out p_vdec->i_raw_size */
179 p_sys->p_decoder->decode( p_block->p_buffer + 4 /*bp?*/,
188 i_width = p_sys->p_decoder->width();
189 i_height = p_sys->p_decoder->height();
190 if( !p_sys->b_inited )
192 msg_Dbg( p_dec, "video size is perhaps %dx%d", i_width,
194 vout_InitFormat( &p_dec->fmt_out.video, VLC_CODEC_I420,
196 VOUT_ASPECT_FACTOR * i_width / i_height );
197 p_sys->b_inited = true;
201 // p_sys->p_decoder->sync();
202 if( p_block->i_flags & BLOCK_FLAG_END_OF_FRAME )
204 p_pic = decoder_NewPicture( p_dec );
207 block_Release( p_block );
210 p_sys->p_decoder->sync();
211 p_sys->i_counter = 0;
212 p_frame = p_sys->p_decoder->frame();
213 vlc_memcpy( p_dec, p_pic->p[0].p_pixels, p_frame, i_width*i_height );
214 p_frame += i_width * i_height;
215 vlc_memcpy( p_dec, p_pic->p[1].p_pixels, p_frame, i_width*i_height/4 );
216 p_frame += i_width * i_height/4;
217 vlc_memcpy( p_dec, p_pic->p[2].p_pixels, p_frame, i_width*i_height/4 );
218 p_pic->date = p_sys->i_pts;
220 block_Release( p_block);