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ffmpeg / libavcodec / h263dec.c @ ce5e49b0

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1 de6d9b64 Fabrice Bellard
/*
2 983e3246 Michael Niedermayer
 * H.263 decoder
3 406792e7 Diego Biurrun
 * Copyright (c) 2001 Fabrice Bellard
4 8f2ab833 Michael Niedermayer
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 de6d9b64 Fabrice Bellard
 *
6 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9 ff4ec49e Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
12 de6d9b64 Fabrice Bellard
 *
13 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
14 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ff4ec49e Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17 de6d9b64 Fabrice Bellard
 *
18 ff4ec49e Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
19 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
20 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 de6d9b64 Fabrice Bellard
 */
22 115329f1 Diego Biurrun
23 983e3246 Michael Niedermayer
/**
24 ba87f080 Diego Biurrun
 * @file
25 983e3246 Michael Niedermayer
 * H.263 decoder.
26
 */
27 115329f1 Diego Biurrun
28 c6c98d08 Stefano Sabatini
#include "libavutil/cpu.h"
29 40e5d31b Gwenole Beauchesne
#include "internal.h"
30 de6d9b64 Fabrice Bellard
#include "avcodec.h"
31 6000abfa Fabrice Bellard
#include "dsputil.h"
32 de6d9b64 Fabrice Bellard
#include "mpegvideo.h"
33 fc53b6af Michael Niedermayer
#include "h263.h"
34 c33d9814 Diego Biurrun
#include "h263_parser.h"
35 df495dbd Aurelien Jacobs
#include "mpeg4video_parser.h"
36 15025553 Aurelien Jacobs
#include "msmpeg4.h"
37 70e0c871 NVIDIA Corporation
#include "vdpau_internal.h"
38 d375c104 Michael Niedermayer
#include "thread.h"
39 a0b0d753 Michael Niedermayer
#include "flv.h"
40 ca334dd1 Michael Niedermayer
#include "mpeg4video.h"
41 de6d9b64 Fabrice Bellard
42
//#define DEBUG
43 02734c6a Michael Niedermayer
//#define PRINT_FRAME_TIME
44 de6d9b64 Fabrice Bellard
45 98a6fff9 Zuxy Meng
av_cold int ff_h263_decode_init(AVCodecContext *avctx)
46 de6d9b64 Fabrice Bellard
{
47
    MpegEncContext *s = avctx->priv_data;
48 519c2b6d Fabrice Bellard
49 bf89e6b1 Fabrice Bellard
    s->avctx = avctx;
50 de6d9b64 Fabrice Bellard
    s->out_format = FMT_H263;
51
52 21adafec Michael Niedermayer
    s->width  = avctx->coded_width;
53
    s->height = avctx->coded_height;
54 92ba5ffb Michael Niedermayer
    s->workaround_bugs= avctx->workaround_bugs;
55 de6d9b64 Fabrice Bellard
56 4d2858de Michael Niedermayer
    // set defaults
57 3edcacde Michael Niedermayer
    MPV_decode_defaults(s);
58 4d2858de Michael Niedermayer
    s->quant_precision=5;
59
    s->decode_mb= ff_h263_decode_mb;
60 4e00e76b Michael Niedermayer
    s->low_delay= 1;
61 09a9b45e Michael Niedermayer
    avctx->pix_fmt= avctx->get_format(avctx, avctx->codec->pix_fmts);
62 a573cc27 Michael Niedermayer
    s->unrestricted_mv= 1;
63 4d2858de Michael Niedermayer
64 de6d9b64 Fabrice Bellard
    /* select sub codec */
65
    switch(avctx->codec->id) {
66
    case CODEC_ID_H263:
67 68b94c35 Michael Niedermayer
        s->unrestricted_mv= 0;
68 580a7465 David Conrad
        avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
69 de6d9b64 Fabrice Bellard
        break;
70 bf89e6b1 Fabrice Bellard
    case CODEC_ID_MPEG4:
71 de6d9b64 Fabrice Bellard
        break;
72 84afee34 Michael Niedermayer
    case CODEC_ID_MSMPEG4V1:
73 de6d9b64 Fabrice Bellard
        s->h263_msmpeg4 = 1;
74
        s->h263_pred = 1;
75 84afee34 Michael Niedermayer
        s->msmpeg4_version=1;
76
        break;
77
    case CODEC_ID_MSMPEG4V2:
78
        s->h263_msmpeg4 = 1;
79
        s->h263_pred = 1;
80
        s->msmpeg4_version=2;
81
        break;
82
    case CODEC_ID_MSMPEG4V3:
83
        s->h263_msmpeg4 = 1;
84
        s->h263_pred = 1;
85
        s->msmpeg4_version=3;
86 de6d9b64 Fabrice Bellard
        break;
87 e1a9dbff Michael Niedermayer
    case CODEC_ID_WMV1:
88
        s->h263_msmpeg4 = 1;
89
        s->h263_pred = 1;
90
        s->msmpeg4_version=4;
91
        break;
92 8f8402e4 Michael Niedermayer
    case CODEC_ID_WMV2:
93
        s->h263_msmpeg4 = 1;
94
        s->h263_pred = 1;
95
        s->msmpeg4_version=5;
96
        break;
97 c6bb50e0 Reimar Döffinger
    case CODEC_ID_VC1:
98 0d33db8a anonymous
    case CODEC_ID_WMV3:
99
        s->h263_msmpeg4 = 1;
100
        s->h263_pred = 1;
101
        s->msmpeg4_version=6;
102 580a7465 David Conrad
        avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
103 0d33db8a anonymous
        break;
104 de6d9b64 Fabrice Bellard
    case CODEC_ID_H263I:
105
        break;
106 d4f5d74a Garrick Meeker
    case CODEC_ID_FLV1:
107
        s->h263_flv = 1;
108
        break;
109 de6d9b64 Fabrice Bellard
    default:
110
        return -1;
111
    }
112 d7e9533a Michael Niedermayer
    s->codec_id= avctx->codec->id;
113 a05aa821 Michael Niedermayer
    avctx->hwaccel= ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
114 93a21abd Michael Niedermayer
115 de6d9b64 Fabrice Bellard
    /* for h263, we allocate the images after having read the header */
116 488fa19a Michael Niedermayer
    if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
117 4949028f Juanjo
        if (MPV_common_init(s) < 0)
118
            return -1;
119 de6d9b64 Fabrice Bellard
120
        h263_decode_init_vlc(s);
121 115329f1 Diego Biurrun
122 de6d9b64 Fabrice Bellard
    return 0;
123
}
124
125 98a6fff9 Zuxy Meng
av_cold int ff_h263_decode_end(AVCodecContext *avctx)
126 de6d9b64 Fabrice Bellard
{
127
    MpegEncContext *s = avctx->priv_data;
128
129
    MPV_common_end(s);
130
    return 0;
131
}
132
133 7866eeff Michael Niedermayer
/**
134 bb628dae Diego Biurrun
 * returns the number of bytes consumed for building the current frame
135 7866eeff Michael Niedermayer
 */
136
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
137
    int pos= (get_bits_count(&s->gb)+7)>>3;
138 115329f1 Diego Biurrun
139 c0aec489 Gwenole Beauchesne
    if(s->divx_packed || s->avctx->hwaccel){
140 7866eeff Michael Niedermayer
        //we would have to scan through the whole buf to handle the weird reordering ...
141 115329f1 Diego Biurrun
        return buf_size;
142 d7425f59 Michael Niedermayer
    }else if(s->flags&CODEC_FLAG_TRUNCATED){
143
        pos -= s->parse_context.last_index;
144
        if(pos<0) pos=0; // padding is not really read so this might be -1
145
        return pos;
146 7866eeff Michael Niedermayer
    }else{
147 755bfeab Diego Biurrun
        if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
148 77277835 Michael Niedermayer
        if(pos+10>buf_size) pos=buf_size; // oops ;)
149 7866eeff Michael Niedermayer
150
        return pos;
151
    }
152
}
153
154 4d2858de Michael Niedermayer
static int decode_slice(MpegEncContext *s){
155 46b4feec Michael Niedermayer
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
156 af2a9e8f Michael Niedermayer
    const int mb_size= 16>>s->avctx->lowres;
157 4d2858de Michael Niedermayer
    s->last_resync_gb= s->gb;
158
    s->first_slice_line= 1;
159 115329f1 Diego Biurrun
160 4d2858de Michael Niedermayer
    s->resync_mb_x= s->mb_x;
161
    s->resync_mb_y= s->mb_y;
162
163 554daa24 Michael Niedermayer
    ff_set_qscale(s, s->qscale);
164 115329f1 Diego Biurrun
165 1468d503 Gwenole Beauchesne
    if (s->avctx->hwaccel) {
166
        const uint8_t *start= s->gb.buffer + get_bits_count(&s->gb)/8;
167
        const uint8_t *end  = ff_h263_find_resync_marker(start + 1, s->gb.buffer_end);
168
        skip_bits_long(&s->gb, 8*(end - start));
169
        return s->avctx->hwaccel->decode_slice(s->avctx, start, end - start);
170
    }
171 40e5d31b Gwenole Beauchesne
172 4d2858de Michael Niedermayer
    if(s->partitioned_frame){
173
        const int qscale= s->qscale;
174
175 51ce2207 Michael Niedermayer
        if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4){
176 4d2858de Michael Niedermayer
            if(ff_mpeg4_decode_partitions(s) < 0)
177 115329f1 Diego Biurrun
                return -1;
178 4d2858de Michael Niedermayer
        }
179 115329f1 Diego Biurrun
180 d99ce8d7 Fabrice Bellard
        /* restore variables which were modified */
181 4d2858de Michael Niedermayer
        s->first_slice_line=1;
182
        s->mb_x= s->resync_mb_x;
183
        s->mb_y= s->resync_mb_y;
184 554daa24 Michael Niedermayer
        ff_set_qscale(s, qscale);
185 4d2858de Michael Niedermayer
    }
186
187
    for(; s->mb_y < s->mb_height; s->mb_y++) {
188
        /* per-row end of slice checks */
189
        if(s->msmpeg4_version){
190
            if(s->resync_mb_y + s->slice_height == s->mb_y){
191 46b4feec Michael Niedermayer
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
192
193 4d2858de Michael Niedermayer
                return 0;
194
            }
195
        }
196 115329f1 Diego Biurrun
197 4d2858de Michael Niedermayer
        if(s->msmpeg4_version==1){
198
            s->last_dc[0]=
199
            s->last_dc[1]=
200
            s->last_dc[2]= 128;
201
        }
202 115329f1 Diego Biurrun
203 4d2858de Michael Niedermayer
        ff_init_block_index(s);
204
        for(; s->mb_x < s->mb_width; s->mb_x++) {
205
            int ret;
206
207
            ff_update_block_index(s);
208
209
            if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
210 115329f1 Diego Biurrun
                s->first_slice_line=0;
211 4d2858de Michael Niedermayer
            }
212
213
            /* DCT & quantize */
214 115329f1 Diego Biurrun
215 4d2858de Michael Niedermayer
            s->mv_dir = MV_DIR_FORWARD;
216
            s->mv_type = MV_TYPE_16X16;
217 160d679c Mike Melanson
//            s->mb_skipped = 0;
218 4d2858de Michael Niedermayer
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
219
            ret= s->decode_mb(s, s->block);
220
221 ce5e49b0 Stefano Sabatini
            if (s->pict_type!=AV_PICTURE_TYPE_B)
222 7d1c3fc1 Michael Niedermayer
                ff_h263_update_motion_val(s);
223
224 4d2858de Michael Niedermayer
            if(ret<0){
225 7bc9090a Michael Niedermayer
                const int xy= s->mb_x + s->mb_y*s->mb_stride;
226 4d2858de Michael Niedermayer
                if(ret==SLICE_END){
227 aef95c8c Michael Niedermayer
                    MPV_decode_mb(s, s->block);
228 332f9ac4 Michael Niedermayer
                    if(s->loop_filter)
229
                        ff_h263_loop_filter(s);
230 aef95c8c Michael Niedermayer
231 35aa136a Michael Niedermayer
//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
232 46b4feec Michael Niedermayer
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
233 a61f8265 Michael Niedermayer
234
                    s->padding_bug_score--;
235 115329f1 Diego Biurrun
236 4d2858de Michael Niedermayer
                    if(++s->mb_x >= s->mb_width){
237
                        s->mb_x=0;
238 af2a9e8f Michael Niedermayer
                        ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
239 d375c104 Michael Niedermayer
                        MPV_report_decode_progress(s);
240 4d2858de Michael Niedermayer
                        s->mb_y++;
241
                    }
242 115329f1 Diego Biurrun
                    return 0;
243 4d2858de Michael Niedermayer
                }else if(ret==SLICE_NOEND){
244 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
245 46b4feec Michael Niedermayer
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
246 4d2858de Michael Niedermayer
                    return -1;
247
                }
248 9b879566 Michel Bardiaux
                av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
249 46b4feec Michael Niedermayer
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
250 115329f1 Diego Biurrun
251 4d2858de Michael Niedermayer
                return -1;
252
            }
253 aef95c8c Michael Niedermayer
254
            MPV_decode_mb(s, s->block);
255 332f9ac4 Michael Niedermayer
            if(s->loop_filter)
256
                ff_h263_loop_filter(s);
257 4d2858de Michael Niedermayer
        }
258 115329f1 Diego Biurrun
259 af2a9e8f Michael Niedermayer
        ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
260 d375c104 Michael Niedermayer
        MPV_report_decode_progress(s);
261 115329f1 Diego Biurrun
262 4d2858de Michael Niedermayer
        s->mb_x= 0;
263
    }
264 115329f1 Diego Biurrun
265 4d2858de Michael Niedermayer
    assert(s->mb_x==0 && s->mb_y==s->mb_height);
266
267 df59c9c0 Michael Niedermayer
    if(s->codec_id==CODEC_ID_MPEG4
268
       && (s->workaround_bugs&FF_BUG_AUTODETECT)
269
       && get_bits_left(&s->gb) >= 48
270
       && show_bits(&s->gb, 24)==0x4010
271
       && !s->data_partitioning)
272
        s->padding_bug_score+=32;
273
274 a61f8265 Michael Niedermayer
    /* try to detect the padding bug */
275
    if(      s->codec_id==CODEC_ID_MPEG4
276 115329f1 Diego Biurrun
       &&   (s->workaround_bugs&FF_BUG_AUTODETECT)
277 6e44ba15 Ronald S. Bultje
       &&    get_bits_left(&s->gb) >=0
278
       &&    get_bits_left(&s->gb) < 48
279 96d9cb22 Michael Niedermayer
//       &&   !s->resync_marker
280 a61f8265 Michael Niedermayer
       &&   !s->data_partitioning){
281 115329f1 Diego Biurrun
282 a61f8265 Michael Niedermayer
        const int bits_count= get_bits_count(&s->gb);
283 68f593b4 Michael Niedermayer
        const int bits_left = s->gb.size_in_bits - bits_count;
284 115329f1 Diego Biurrun
285 650faac6 Michael Niedermayer
        if(bits_left==0){
286
            s->padding_bug_score+=16;
287 8671359b Michael Niedermayer
        } else if(bits_left != 1){
288 a61f8265 Michael Niedermayer
            int v= show_bits(&s->gb, 8);
289
            v|= 0x7F >> (7-(bits_count&7));
290 8671359b Michael Niedermayer
291 4940ed6a Michael Niedermayer
            if(v==0x7F && bits_left<=8)
292 a61f8265 Michael Niedermayer
                s->padding_bug_score--;
293 4940ed6a Michael Niedermayer
            else if(v==0x7F && ((get_bits_count(&s->gb)+8)&8) && bits_left<=16)
294
                s->padding_bug_score+= 4;
295 a61f8265 Michael Niedermayer
            else
296 115329f1 Diego Biurrun
                s->padding_bug_score++;
297
        }
298 a61f8265 Michael Niedermayer
    }
299 115329f1 Diego Biurrun
300 4940ed6a Michael Niedermayer
    if(s->workaround_bugs&FF_BUG_AUTODETECT){
301 b317567c Michael Niedermayer
        if(s->padding_bug_score > -2 && !s->data_partitioning /*&& (s->divx_version>=0 || !s->resync_marker)*/)
302 4940ed6a Michael Niedermayer
            s->workaround_bugs |=  FF_BUG_NO_PADDING;
303
        else
304
            s->workaround_bugs &= ~FF_BUG_NO_PADDING;
305
    }
306 a61f8265 Michael Niedermayer
307 bb628dae Diego Biurrun
    // handle formats which don't have unique end markers
308 cb7c98d6 Michael Niedermayer
    if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
309 6e44ba15 Ronald S. Bultje
        int left= get_bits_left(&s->gb);
310 4d2858de Michael Niedermayer
        int max_extra=7;
311 115329f1 Diego Biurrun
312 4d2858de Michael Niedermayer
        /* no markers in M$ crap */
313 ce5e49b0 Stefano Sabatini
        if(s->msmpeg4_version && s->pict_type==AV_PICTURE_TYPE_I)
314 4d2858de Michael Niedermayer
            max_extra+= 17;
315 115329f1 Diego Biurrun
316 4d2858de Michael Niedermayer
        /* buggy padding but the frame should still end approximately at the bitstream end */
317 047599a4 Michael Niedermayer
        if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_recognition>=3)
318 4d2858de Michael Niedermayer
            max_extra+= 48;
319 cb7c98d6 Michael Niedermayer
        else if((s->workaround_bugs&FF_BUG_NO_PADDING))
320 4d2858de Michael Niedermayer
            max_extra+= 256*256*256*64;
321 115329f1 Diego Biurrun
322 4d2858de Michael Niedermayer
        if(left>max_extra){
323 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
324 4d2858de Michael Niedermayer
        }
325
        else if(left<0){
326 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
327 4d2858de Michael Niedermayer
        }else
328 46b4feec Michael Niedermayer
            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
329 115329f1 Diego Biurrun
330 4d2858de Michael Niedermayer
        return 0;
331
    }
332 a61f8265 Michael Niedermayer
333 115329f1 Diego Biurrun
    av_log(s->avctx, AV_LOG_ERROR, "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
334 6e44ba15 Ronald S. Bultje
            get_bits_left(&s->gb),
335 9b6a5b87 Michael Niedermayer
            show_bits(&s->gb, 24), s->padding_bug_score);
336 115329f1 Diego Biurrun
337 46b4feec Michael Niedermayer
    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
338
339 4d2858de Michael Niedermayer
    return -1;
340
}
341
342 115329f1 Diego Biurrun
int ff_h263_decode_frame(AVCodecContext *avctx,
343 de6d9b64 Fabrice Bellard
                             void *data, int *data_size,
344 7a00bbad Thilo Borgmann
                             AVPacket *avpkt)
345 de6d9b64 Fabrice Bellard
{
346 7a00bbad Thilo Borgmann
    const uint8_t *buf = avpkt->data;
347
    int buf_size = avpkt->size;
348 de6d9b64 Fabrice Bellard
    MpegEncContext *s = avctx->priv_data;
349 1df1df0b Fabrice Bellard
    int ret;
350 115329f1 Diego Biurrun
    AVFrame *pict = data;
351
352 02734c6a Michael Niedermayer
#ifdef PRINT_FRAME_TIME
353
uint64_t time= rdtsc();
354
#endif
355 b50eef3a Michael Niedermayer
    s->flags= avctx->flags;
356 303e50e6 Michael Niedermayer
    s->flags2= avctx->flags2;
357 6733417a Michael Niedermayer
358 e9174ba4 Michael Niedermayer
    /* no supplementary picture */
359 de6d9b64 Fabrice Bellard
    if (buf_size == 0) {
360 e9174ba4 Michael Niedermayer
        /* special case for last picture */
361
        if (s->low_delay==0 && s->next_picture_ptr) {
362
            *pict= *(AVFrame*)s->next_picture_ptr;
363
            s->next_picture_ptr= NULL;
364
365
            *data_size = sizeof(AVFrame);
366
        }
367
368 de6d9b64 Fabrice Bellard
        return 0;
369
    }
370 b7a22d84 Michael Niedermayer
371 d7425f59 Michael Niedermayer
    if(s->flags&CODEC_FLAG_TRUNCATED){
372
        int next;
373 115329f1 Diego Biurrun
374 49fb20cb Aurelien Jacobs
        if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4){
375 e4cb187d Michael Niedermayer
            next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
376 49fb20cb Aurelien Jacobs
        }else if(CONFIG_H263_DECODER && s->codec_id==CODEC_ID_H263){
377 c33d9814 Diego Biurrun
            next= ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
378 d7425f59 Michael Niedermayer
        }else{
379 160d679c Mike Melanson
            av_log(s->avctx, AV_LOG_ERROR, "this codec does not support truncated bitstreams\n");
380 d7425f59 Michael Niedermayer
            return -1;
381
        }
382 115329f1 Diego Biurrun
383 c53d2d90 Aurelien Jacobs
        if( ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
384 d7425f59 Michael Niedermayer
            return buf_size;
385
    }
386 de6d9b64 Fabrice Bellard
387 115329f1 Diego Biurrun
388 4a3d7fbc Michael Niedermayer
retry:
389 1b4580d1 Michael Niedermayer
    if(s->divx_packed && s->xvid_build>=0 && s->bitstream_buffer_size){
390
        int i;
391
        for(i=0; i<buf_size-3; i++){
392
            if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1){
393 3088635a Michael Niedermayer
                if(buf[i+3]==0xB0){
394
                    av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
395 1b4580d1 Michael Niedermayer
                    s->bitstream_buffer_size=0;
396 3088635a Michael Niedermayer
                }
397 1b4580d1 Michael Niedermayer
                break;
398
            }
399
        }
400
    }
401 115329f1 Diego Biurrun
402 fb204d4b Michael Niedermayer
    if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder
403 68f593b4 Michael Niedermayer
        init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
404 51b8fd19 Michael Niedermayer
    }else
405 68f593b4 Michael Niedermayer
        init_get_bits(&s->gb, buf, buf_size*8);
406 4136dd24 Michael Niedermayer
    s->bitstream_buffer_size=0;
407 de6d9b64 Fabrice Bellard
408 3a3d3a42 Michael Niedermayer
    if (!s->context_initialized) {
409 46fd0de8 Michael Niedermayer
        if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
410 3a3d3a42 Michael Niedermayer
            return -1;
411
    }
412 115329f1 Diego Biurrun
413 755bfeab Diego Biurrun
    /* We need to set current_picture_ptr before reading the header,
414
     * otherwise we cannot store anyting in there */
415 5f194811 Michael Niedermayer
    if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
416
        int i= ff_find_unused_picture(s, 0);
417
        s->current_picture_ptr= &s->picture[i];
418
    }
419 115329f1 Diego Biurrun
420 de6d9b64 Fabrice Bellard
    /* let's go :-) */
421 49fb20cb Aurelien Jacobs
    if (CONFIG_WMV2_DECODER && s->msmpeg4_version==5) {
422 1457ab52 Michael Niedermayer
        ret= ff_wmv2_decode_picture_header(s);
423 49fb20cb Aurelien Jacobs
    } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
424 de6d9b64 Fabrice Bellard
        ret = msmpeg4_decode_picture_header(s);
425 0b60f3bd Michael Niedermayer
    } else if (CONFIG_MPEG4_DECODER && s->h263_pred) {
426 b704e742 Michael Niedermayer
        if(s->avctx->extradata_size && s->picture_number==0){
427
            GetBitContext gb;
428 115329f1 Diego Biurrun
429 68f593b4 Michael Niedermayer
            init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
430 b704e742 Michael Niedermayer
            ret = ff_mpeg4_decode_picture_header(s, &gb);
431
        }
432
        ret = ff_mpeg4_decode_picture_header(s, &s->gb);
433 0b60f3bd Michael Niedermayer
    } else if (CONFIG_H263I_DECODER && s->codec_id == CODEC_ID_H263I) {
434 d7525cba Michael Niedermayer
        ret = ff_intel_h263_decode_picture_header(s);
435 a0b0d753 Michael Niedermayer
    } else if (CONFIG_FLV_DECODER && s->h263_flv) {
436
        ret = ff_flv_decode_picture_header(s);
437 de6d9b64 Fabrice Bellard
    } else {
438
        ret = h263_decode_picture_header(s);
439 488fa19a Michael Niedermayer
    }
440 115329f1 Diego Biurrun
441 160d679c Mike Melanson
    if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_size);
442 ffba1dc0 Michael Niedermayer
443
    /* skip if the header was thrashed */
444
    if (ret < 0){
445 9b879566 Michel Bardiaux
        av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
446 ffba1dc0 Michael Niedermayer
        return -1;
447
    }
448 115329f1 Diego Biurrun
449 4e00e76b Michael Niedermayer
    avctx->has_b_frames= !s->low_delay;
450 115329f1 Diego Biurrun
451 b317567c Michael Niedermayer
    if(s->xvid_build==-1 && s->divx_version==-1 && s->lavc_build==-1){
452 2bb6eba2 Aurelien Jacobs
        if(s->stream_codec_tag == AV_RL32("XVID") ||
453
           s->codec_tag == AV_RL32("XVID") || s->codec_tag == AV_RL32("XVIX") ||
454 d3752b15 Michael Niedermayer
           s->codec_tag == AV_RL32("RMP4") ||
455
           s->codec_tag == AV_RL32("SIPP")
456
           )
457 b317567c Michael Niedermayer
            s->xvid_build= 0;
458 541ae140 Michael Niedermayer
#if 0
459 2bb6eba2 Aurelien Jacobs
        if(s->codec_tag == AV_RL32("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
460 115329f1 Diego Biurrun
           && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
461 b317567c Michael Niedermayer
            s->xvid_build= 0;
462 541ae140 Michael Niedermayer
#endif
463
    }
464 9b6a5b87 Michael Niedermayer
465 b317567c Michael Niedermayer
    if(s->xvid_build==-1 && s->divx_version==-1 && s->lavc_build==-1){
466 2bb6eba2 Aurelien Jacobs
        if(s->codec_tag == AV_RL32("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
467 9b6a5b87 Michael Niedermayer
            s->divx_version= 400; //divx 4
468
    }
469 115329f1 Diego Biurrun
470 b317567c Michael Niedermayer
    if(s->xvid_build>=0 && s->divx_version>=0){
471 45cb4767 Michael Niedermayer
        s->divx_version=
472 b317567c Michael Niedermayer
        s->divx_build= -1;
473 45cb4767 Michael Niedermayer
    }
474 4d2858de Michael Niedermayer
475
    if(s->workaround_bugs&FF_BUG_AUTODETECT){
476 2bb6eba2 Aurelien Jacobs
        if(s->codec_tag == AV_RL32("XVIX"))
477 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_XVID_ILACE;
478 9b6a5b87 Michael Niedermayer
479 2bb6eba2 Aurelien Jacobs
        if(s->codec_tag == AV_RL32("UMP4")){
480 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_UMP4;
481
        }
482 03e93d35 Michael Niedermayer
483 58d1dc0e Lord
        if(s->divx_version>=500 && s->divx_build<1814){
484 03e93d35 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
485
        }
486 7da71a5c Michael Niedermayer
487 58d1dc0e Lord
        if(s->divx_version>502 && s->divx_build<1814){
488 36df8805 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
489
        }
490
491 b317567c Michael Niedermayer
        if(s->xvid_build<=3U)
492 a6a494fb Michael Niedermayer
            s->padding_bug_score= 256*256*256*64;
493 115329f1 Diego Biurrun
494 b317567c Michael Niedermayer
        if(s->xvid_build<=1U)
495 7da71a5c Michael Niedermayer
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
496
497 b317567c Michael Niedermayer
        if(s->xvid_build<=12U)
498 9b6a5b87 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_EDGE;
499
500 b317567c Michael Niedermayer
        if(s->xvid_build<=32U)
501 4ccde216 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_DC_CLIP;
502
503 db794953 Michael Niedermayer
#define SET_QPEL_FUNC(postfix1, postfix2) \
504
    s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
505
    s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
506
    s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
507
508 b317567c Michael Niedermayer
        if(s->lavc_build<4653U)
509 db794953 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_STD_QPEL;
510 115329f1 Diego Biurrun
511 b317567c Michael Niedermayer
        if(s->lavc_build<4655U)
512 c40c3482 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
513
514 b317567c Michael Niedermayer
        if(s->lavc_build<4670U){
515 6674a126 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_EDGE;
516
        }
517 115329f1 Diego Biurrun
518 b317567c Michael Niedermayer
        if(s->lavc_build<=4712U)
519 4ccde216 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_DC_CLIP;
520 6674a126 Michael Niedermayer
521 b317567c Michael Niedermayer
        if(s->divx_version>=0)
522 c40c3482 Michael Niedermayer
            s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
523 a61f8265 Michael Niedermayer
//printf("padding_bug_score: %d\n", s->padding_bug_score);
524 d671e2fe Michael Niedermayer
        if(s->divx_version==501 && s->divx_build==20020416)
525
            s->padding_bug_score= 256*256*256*64;
526 1c6dcb0f Michael Niedermayer
527 b317567c Michael Niedermayer
        if(s->divx_version<500U){
528 1c6dcb0f Michael Niedermayer
            s->workaround_bugs|= FF_BUG_EDGE;
529
        }
530 115329f1 Diego Biurrun
531 b317567c Michael Niedermayer
        if(s->divx_version>=0)
532 b44bdf7e Michael Niedermayer
            s->workaround_bugs|= FF_BUG_HPEL_CHROMA;
533 a61f8265 Michael Niedermayer
#if 0
534 4d2858de Michael Niedermayer
        if(s->divx_version==500)
535 d671e2fe Michael Niedermayer
            s->padding_bug_score= 256*256*256*64;
536 4d2858de Michael Niedermayer

537
        /* very ugly XVID padding bug detection FIXME/XXX solve this differently
538 ca74c0a1 Diego Biurrun
         * Let us hope this at least works.
539 4d2858de Michael Niedermayer
         */
540 b317567c Michael Niedermayer
        if(   s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==-1
541 4d2858de Michael Niedermayer
           && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
542
            s->workaround_bugs|= FF_BUG_NO_PADDING;
543 115329f1 Diego Biurrun

544 b317567c Michael Niedermayer
        if(s->lavc_build<4609U) //FIXME not sure about the version num but a 4609 file seems ok
545 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_NO_PADDING;
546 a61f8265 Michael Niedermayer
#endif
547 4d2858de Michael Niedermayer
    }
548 115329f1 Diego Biurrun
549 db794953 Michael Niedermayer
    if(s->workaround_bugs& FF_BUG_STD_QPEL){
550
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
551
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
552
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
553
        SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
554
        SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
555
        SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
556
557
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
558
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
559
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
560
        SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
561
        SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
562
        SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
563
    }
564 4d2858de Michael Niedermayer
565 8fc6c2b5 Michael Niedermayer
    if(avctx->debug & FF_DEBUG_BUGS)
566 115329f1 Diego Biurrun
        av_log(s->avctx, AV_LOG_DEBUG, "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
567 8fc6c2b5 Michael Niedermayer
               s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build,
568
               s->divx_packed ? "p" : "");
569 115329f1 Diego Biurrun
570 b250f9c6 Aurelien Jacobs
#if HAVE_MMX
571 c6c98d08 Stefano Sabatini
    if (s->codec_id == CODEC_ID_MPEG4 && s->xvid_build>=0 && avctx->idct_algo == FF_IDCT_AUTO && (av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
572 ddabdfef Michael Niedermayer
        avctx->idct_algo= FF_IDCT_XVIDMMX;
573 cfeae977 Michael Niedermayer
        avctx->coded_width= 0; // force reinit
574 6baac1af Michael Niedermayer
//        dsputil_init(&s->dsp, avctx);
575
        s->picture_number=0;
576 ee0c00d3 Michael Niedermayer
    }
577 b442a92f Alex Beregszaszi
#endif
578
579 488fa19a Michael Niedermayer
        /* After H263 & mpeg4 header decode we have the height, width,*/
580 9eaa4690 Juanjo
        /* and other parameters. So then we could init the picture   */
581
        /* FIXME: By the way H263 decoder is evolving it should have */
582
        /* an H263EncContext                                         */
583 115329f1 Diego Biurrun
584
    if (   s->width  != avctx->coded_width
585 21adafec Michael Niedermayer
        || s->height != avctx->coded_height) {
586 93a21abd Michael Niedermayer
        /* H.263 could change picture size any time */
587 bcc7125e Michael Niedermayer
        ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat
588
        s->parse_context.buffer=0;
589 93a21abd Michael Niedermayer
        MPV_common_end(s);
590 bcc7125e Michael Niedermayer
        s->parse_context= pc;
591 93a21abd Michael Niedermayer
    }
592 488fa19a Michael Niedermayer
    if (!s->context_initialized) {
593 21adafec Michael Niedermayer
        avcodec_set_dimensions(avctx, s->width, s->height);
594 4d2858de Michael Niedermayer
595 4a3d7fbc Michael Niedermayer
        goto retry;
596 de6d9b64 Fabrice Bellard
    }
597 35aa136a Michael Niedermayer
598 71a3dff9 Kostya Shishkov
    if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P || s->codec_id == CODEC_ID_H263I))
599 35aa136a Michael Niedermayer
        s->gob_index = ff_h263_get_gob_height(s);
600 115329f1 Diego Biurrun
601 8ed2ae09 Anton Khirnov
    // for skipping the frame
602 1e491e29 Michael Niedermayer
    s->current_picture.pict_type= s->pict_type;
603 ce5e49b0 Stefano Sabatini
    s->current_picture.key_frame= s->pict_type == AV_PICTURE_TYPE_I;
604 347ae22e Michael Niedermayer
605 bb628dae Diego Biurrun
    /* skip B-frames if we don't have reference frames */
606 ce5e49b0 Stefano Sabatini
    if(s->last_picture_ptr==NULL && (s->pict_type==AV_PICTURE_TYPE_B || s->dropable)) return get_consumed_bytes(s, buf_size);
607
    if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==AV_PICTURE_TYPE_B)
608
       || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=AV_PICTURE_TYPE_I)
609 115329f1 Diego Biurrun
       ||  avctx->skip_frame >= AVDISCARD_ALL)
610 8c3eba7c Michael Niedermayer
        return get_consumed_bytes(s, buf_size);
611 115329f1 Diego Biurrun
612 6733417a Michael Niedermayer
    if(s->next_p_frame_damaged){
613 ce5e49b0 Stefano Sabatini
        if(s->pict_type==AV_PICTURE_TYPE_B)
614 7866eeff Michael Niedermayer
            return get_consumed_bytes(s, buf_size);
615 6733417a Michael Niedermayer
        else
616
            s->next_p_frame_damaged=0;
617
    }
618
619 ce5e49b0 Stefano Sabatini
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && s->pict_type==AV_PICTURE_TYPE_B){
620 2833fc46 Loren Merritt
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
621
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
622 ce5e49b0 Stefano Sabatini
    }else if((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
623 a1b13cf5 Loren Merritt
        s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
624 2833fc46 Loren Merritt
        s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
625
    }else{
626 a1b13cf5 Loren Merritt
        s->me.qpel_put= s->dsp.put_no_rnd_qpel_pixels_tab;
627 2833fc46 Loren Merritt
        s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
628
    }
629
630 d6db1c9c Michael Niedermayer
    if(MPV_frame_start(s, avctx) < 0)
631
        return -1;
632 de6d9b64 Fabrice Bellard
633 d375c104 Michael Niedermayer
    if (!s->divx_packed) ff_thread_finish_setup(avctx);
634
635 70e0c871 NVIDIA Corporation
    if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
636 bf9d70d5 Carl Eugen Hoyos
        ff_vdpau_mpeg4_decode_picture(s, s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
637 70e0c871 NVIDIA Corporation
        goto frame_end;
638
    }
639
640 1468d503 Gwenole Beauchesne
    if (avctx->hwaccel) {
641 bf9d70d5 Carl Eugen Hoyos
        if (avctx->hwaccel->start_frame(avctx, s->gb.buffer, s->gb.buffer_end - s->gb.buffer) < 0)
642 1468d503 Gwenole Beauchesne
            return -1;
643
    }
644
645 46b4feec Michael Niedermayer
    ff_er_frame_start(s);
646 115329f1 Diego Biurrun
647 487bce53 Michael Niedermayer
    //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
648 755bfeab Diego Biurrun
    //which is not available before MPV_frame_start()
649 49fb20cb Aurelien Jacobs
    if (CONFIG_WMV2_DECODER && s->msmpeg4_version==5){
650 9abc7e0f Michael Niedermayer
        ret = ff_wmv2_decode_secondary_picture_header(s);
651
        if(ret<0) return ret;
652
        if(ret==1) goto intrax8_decoded;
653 487bce53 Michael Niedermayer
    }
654
655 de6d9b64 Fabrice Bellard
    /* decode each macroblock */
656 115329f1 Diego Biurrun
    s->mb_x=0;
657 4d2858de Michael Niedermayer
    s->mb_y=0;
658 115329f1 Diego Biurrun
659 4d2858de Michael Niedermayer
    decode_slice(s);
660 487bce53 Michael Niedermayer
    while(s->mb_y<s->mb_height){
661 4d2858de Michael Niedermayer
        if(s->msmpeg4_version){
662 b34397b4 Michael Niedermayer
            if(s->slice_height==0 || s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
663 4d2858de Michael Niedermayer
                break;
664
        }else{
665
            if(ff_h263_resync(s)<0)
666
                break;
667 6733417a Michael Niedermayer
        }
668 115329f1 Diego Biurrun
669 28269849 Michael Niedermayer
        if(s->msmpeg4_version<4 && s->h263_pred)
670 4d2858de Michael Niedermayer
            ff_mpeg4_clean_buffers(s);
671 649c00c9 Michael Niedermayer
672 4d2858de Michael Niedermayer
        decode_slice(s);
673 de6d9b64 Fabrice Bellard
    }
674 8b32880c Michael Niedermayer
675 ce5e49b0 Stefano Sabatini
    if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==AV_PICTURE_TYPE_I)
676 49fb20cb Aurelien Jacobs
        if(!CONFIG_MSMPEG4_DECODER || msmpeg4_decode_ext_header(s, buf_size) < 0){
677 1e491e29 Michael Niedermayer
            s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
678
        }
679 115329f1 Diego Biurrun
680 6c587587 Michael Niedermayer
    assert(s->bitstream_buffer_size==0);
681 8ef4f92b Carl Eugen Hoyos
frame_end:
682 eec1c6b9 Michael Niedermayer
    /* divx 5.01+ bistream reorder stuff */
683 6c587587 Michael Niedermayer
    if(s->codec_id==CODEC_ID_MPEG4 && s->divx_packed){
684 6733417a Michael Niedermayer
        int current_pos= get_bits_count(&s->gb)>>3;
685 fb204d4b Michael Niedermayer
        int startcode_found=0;
686 115329f1 Diego Biurrun
687 0ecca7a4 Michael Niedermayer
        if(buf_size - current_pos > 5){
688 6733417a Michael Niedermayer
            int i;
689 7866eeff Michael Niedermayer
            for(i=current_pos; i<buf_size-3; i++){
690 6733417a Michael Niedermayer
                if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
691
                    startcode_found=1;
692
                    break;
693
                }
694
            }
695 fb204d4b Michael Niedermayer
        }
696 b317567c Michael Niedermayer
        if(s->gb.buffer == s->bitstream_buffer && buf_size>7 && s->xvid_build>=0){ //xvid style
697 fb204d4b Michael Niedermayer
            startcode_found=1;
698
            current_pos=0;
699
        }
700
701
        if(startcode_found){
702 238ef6da Reimar Döffinger
            av_fast_malloc(
703
                &s->bitstream_buffer,
704 115329f1 Diego Biurrun
                &s->allocated_bitstream_buffer_size,
705 0ecca7a4 Michael Niedermayer
                buf_size - current_pos + FF_INPUT_BUFFER_PADDING_SIZE);
706 238ef6da Reimar Döffinger
            if (!s->bitstream_buffer)
707
                return AVERROR(ENOMEM);
708 fb204d4b Michael Niedermayer
            memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
709
            s->bitstream_buffer_size= buf_size - current_pos;
710 6733417a Michael Niedermayer
        }
711
    }
712
713 9abc7e0f Michael Niedermayer
intrax8_decoded:
714 46b4feec Michael Niedermayer
    ff_er_frame_end(s);
715 4d2858de Michael Niedermayer
716 f986c8e2 Michael Niedermayer
    if (avctx->hwaccel) {
717
        if (avctx->hwaccel->end_frame(avctx) < 0)
718
            return -1;
719
    }
720
721 de6d9b64 Fabrice Bellard
    MPV_frame_end(s);
722 db794953 Michael Niedermayer
723 db6e7795 Michael Niedermayer
assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
724
assert(s->current_picture.pict_type == s->pict_type);
725 ce5e49b0 Stefano Sabatini
    if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
726 5430b070 Michael Niedermayer
        *pict= *(AVFrame*)s->current_picture_ptr;
727
    } else if (s->last_picture_ptr != NULL) {
728
        *pict= *(AVFrame*)s->last_picture_ptr;
729
    }
730
731
    if(s->last_picture_ptr || s->low_delay){
732
        *data_size = sizeof(AVFrame);
733 0c9bbaec Wolfgang Hesseler
        ff_print_debug_info(s, pict);
734 6f91bcd1 Michael Niedermayer
    }
735 8fc69895 Michael Niedermayer
736 02734c6a Michael Niedermayer
#ifdef PRINT_FRAME_TIME
737 949b1a13 Steve L'Homme
av_log(avctx, AV_LOG_DEBUG, "%"PRId64"\n", rdtsc()-time);
738 02734c6a Michael Niedermayer
#endif
739 d07f9043 Michael Niedermayer
740 7866eeff Michael Niedermayer
    return get_consumed_bytes(s, buf_size);
741 de6d9b64 Fabrice Bellard
}
742
743 e7e2df27 Diego Elio Pettenò
AVCodec ff_h263_decoder = {
744 de6d9b64 Fabrice Bellard
    "h263",
745 72415b2a Stefano Sabatini
    AVMEDIA_TYPE_VIDEO,
746 de6d9b64 Fabrice Bellard
    CODEC_ID_H263,
747
    sizeof(MpegEncContext),
748 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
749 de6d9b64 Fabrice Bellard
    NULL,
750 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
751
    ff_h263_decode_frame,
752 934982c4 Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
753 7a06ff14 Michael Niedermayer
    .flush= ff_mpeg_flush,
754 0fd0ef79 Carl Eugen Hoyos
    .max_lowres= 3,
755 0ffbc258 Diego Biurrun
    .long_name= NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
756 a4f3fdfa Gwenole Beauchesne
    .pix_fmts= ff_hwaccel_pixfmt_list_420,
757 de6d9b64 Fabrice Bellard
};