Revision 26b4fe82 libavcodec/h264.c

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libavcodec/h264.c
30 30
#include "dsputil.h"
31 31
#include "avcodec.h"
32 32
#include "mpegvideo.h"
33
#include "h264.h"
33 34
#include "h264data.h"
35
#include "h264_parser.h"
34 36
#include "golomb.h"
35 37

  
36 38
#include "cabac.h"
......
38 40
//#undef NDEBUG
39 41
#include <assert.h>
40 42

  
41
#define interlaced_dct interlaced_dct_is_a_bad_name
42
#define mb_intra mb_intra_isnt_initalized_see_mb_type
43

  
44
#define LUMA_DC_BLOCK_INDEX   25
45
#define CHROMA_DC_BLOCK_INDEX 26
46

  
47
#define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
48
#define COEFF_TOKEN_VLC_BITS           8
49
#define TOTAL_ZEROS_VLC_BITS           9
50
#define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
51
#define RUN_VLC_BITS                   3
52
#define RUN7_VLC_BITS                  6
53

  
54
#define MAX_SPS_COUNT 32
55
#define MAX_PPS_COUNT 256
56

  
57
#define MAX_MMCO_COUNT 66
58

  
59
/* Compiling in interlaced support reduces the speed
60
 * of progressive decoding by about 2%. */
61
#define ALLOW_INTERLACE
62

  
63
#ifdef ALLOW_INTERLACE
64
#define MB_MBAFF h->mb_mbaff
65
#define MB_FIELD h->mb_field_decoding_flag
66
#define FRAME_MBAFF h->mb_aff_frame
67
#else
68
#define MB_MBAFF 0
69
#define MB_FIELD 0
70
#define FRAME_MBAFF 0
71
#undef  IS_INTERLACED
72
#define IS_INTERLACED(mb_type) 0
73
#endif
74

  
75
/**
76
 * Sequence parameter set
77
 */
78
typedef struct SPS{
79

  
80
    int profile_idc;
81
    int level_idc;
82
    int transform_bypass;              ///< qpprime_y_zero_transform_bypass_flag
83
    int log2_max_frame_num;            ///< log2_max_frame_num_minus4 + 4
84
    int poc_type;                      ///< pic_order_cnt_type
85
    int log2_max_poc_lsb;              ///< log2_max_pic_order_cnt_lsb_minus4
86
    int delta_pic_order_always_zero_flag;
87
    int offset_for_non_ref_pic;
88
    int offset_for_top_to_bottom_field;
89
    int poc_cycle_length;              ///< num_ref_frames_in_pic_order_cnt_cycle
90
    int ref_frame_count;               ///< num_ref_frames
91
    int gaps_in_frame_num_allowed_flag;
92
    int mb_width;                      ///< frame_width_in_mbs_minus1 + 1
93
    int mb_height;                     ///< frame_height_in_mbs_minus1 + 1
94
    int frame_mbs_only_flag;
95
    int mb_aff;                        ///<mb_adaptive_frame_field_flag
96
    int direct_8x8_inference_flag;
97
    int crop;                   ///< frame_cropping_flag
98
    int crop_left;              ///< frame_cropping_rect_left_offset
99
    int crop_right;             ///< frame_cropping_rect_right_offset
100
    int crop_top;               ///< frame_cropping_rect_top_offset
101
    int crop_bottom;            ///< frame_cropping_rect_bottom_offset
102
    int vui_parameters_present_flag;
103
    AVRational sar;
104
    int timing_info_present_flag;
105
    uint32_t num_units_in_tick;
106
    uint32_t time_scale;
107
    int fixed_frame_rate_flag;
108
    short offset_for_ref_frame[256]; //FIXME dyn aloc?
109
    int bitstream_restriction_flag;
110
    int num_reorder_frames;
111
    int scaling_matrix_present;
112
    uint8_t scaling_matrix4[6][16];
113
    uint8_t scaling_matrix8[2][64];
114
}SPS;
115

  
116
/**
117
 * Picture parameter set
118
 */
119
typedef struct PPS{
120
    unsigned int sps_id;
121
    int cabac;                  ///< entropy_coding_mode_flag
122
    int pic_order_present;      ///< pic_order_present_flag
123
    int slice_group_count;      ///< num_slice_groups_minus1 + 1
124
    int mb_slice_group_map_type;
125
    unsigned int ref_count[2];  ///< num_ref_idx_l0/1_active_minus1 + 1
126
    int weighted_pred;          ///< weighted_pred_flag
127
    int weighted_bipred_idc;
128
    int init_qp;                ///< pic_init_qp_minus26 + 26
129
    int init_qs;                ///< pic_init_qs_minus26 + 26
130
    int chroma_qp_index_offset;
131
    int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
132
    int constrained_intra_pred; ///< constrained_intra_pred_flag
133
    int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
134
    int transform_8x8_mode;     ///< transform_8x8_mode_flag
135
    uint8_t scaling_matrix4[6][16];
136
    uint8_t scaling_matrix8[2][64];
137
}PPS;
138

  
139
/**
140
 * Memory management control operation opcode.
141
 */
142
typedef enum MMCOOpcode{
143
    MMCO_END=0,
144
    MMCO_SHORT2UNUSED,
145
    MMCO_LONG2UNUSED,
146
    MMCO_SHORT2LONG,
147
    MMCO_SET_MAX_LONG,
148
    MMCO_RESET,
149
    MMCO_LONG,
150
} MMCOOpcode;
151

  
152
/**
153
 * Memory management control operation.
154
 */
155
typedef struct MMCO{
156
    MMCOOpcode opcode;
157
    int short_frame_num;
158
    int long_index;
159
} MMCO;
160

  
161
/**
162
 * H264Context
163
 */
164
typedef struct H264Context{
165
    MpegEncContext s;
166
    int nal_ref_idc;
167
    int nal_unit_type;
168
    uint8_t *rbsp_buffer;
169
    unsigned int rbsp_buffer_size;
170

  
171
    /**
172
      * Used to parse AVC variant of h264
173
      */
174
    int is_avc; ///< this flag is != 0 if codec is avc1
175
    int got_avcC; ///< flag used to parse avcC data only once
176
    int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
177

  
178
    int chroma_qp; //QPc
179

  
180
    int prev_mb_skipped;
181
    int next_mb_skipped;
182

  
183
    //prediction stuff
184
    int chroma_pred_mode;
185
    int intra16x16_pred_mode;
186

  
187
    int top_mb_xy;
188
    int left_mb_xy[2];
189

  
190
    int8_t intra4x4_pred_mode_cache[5*8];
191
    int8_t (*intra4x4_pred_mode)[8];
192
    void (*pred4x4  [9+3])(uint8_t *src, uint8_t *topright, int stride);//FIXME move to dsp?
193
    void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride);
194
    void (*pred8x8  [4+3])(uint8_t *src, int stride);
195
    void (*pred16x16[4+3])(uint8_t *src, int stride);
196
    unsigned int topleft_samples_available;
197
    unsigned int top_samples_available;
198
    unsigned int topright_samples_available;
199
    unsigned int left_samples_available;
200
    uint8_t (*top_borders[2])[16+2*8];
201
    uint8_t left_border[2*(17+2*9)];
202

  
203
    /**
204
     * non zero coeff count cache.
205
     * is 64 if not available.
206
     */
207
    DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]);
208
    uint8_t (*non_zero_count)[16];
209

  
210
    /**
211
     * Motion vector cache.
212
     */
213
    DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]);
214
    DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]);
215
#define LIST_NOT_USED -1 //FIXME rename?
216
#define PART_NOT_AVAILABLE -2
217

  
218
    /**
219
     * is 1 if the specific list MV&references are set to 0,0,-2.
220
     */
221
    int mv_cache_clean[2];
222

  
223
    /**
224
     * number of neighbors (top and/or left) that used 8x8 dct
225
     */
226
    int neighbor_transform_size;
227

  
228
    /**
229
     * block_offset[ 0..23] for frame macroblocks
230
     * block_offset[24..47] for field macroblocks
231
     */
232
    int block_offset[2*(16+8)];
233

  
234
    uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
235
    uint32_t *mb2b8_xy;
236
    int b_stride; //FIXME use s->b4_stride
237
    int b8_stride;
238

  
239
    int mb_linesize;   ///< may be equal to s->linesize or s->linesize*2, for mbaff
240
    int mb_uvlinesize;
241

  
242
    int emu_edge_width;
243
    int emu_edge_height;
244

  
245
    int halfpel_flag;
246
    int thirdpel_flag;
247

  
248
    int unknown_svq3_flag;
249
    int next_slice_index;
250

  
251
    SPS sps_buffer[MAX_SPS_COUNT];
252
    SPS sps; ///< current sps
253

  
254
    PPS pps_buffer[MAX_PPS_COUNT];
255
    /**
256
     * current pps
257
     */
258
    PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
259

  
260
    uint32_t dequant4_buffer[6][52][16];
261
    uint32_t dequant8_buffer[2][52][64];
262
    uint32_t (*dequant4_coeff[6])[16];
263
    uint32_t (*dequant8_coeff[2])[64];
264
    int dequant_coeff_pps;     ///< reinit tables when pps changes
265

  
266
    int slice_num;
267
    uint8_t *slice_table_base;
268
    uint8_t *slice_table;      ///< slice_table_base + 2*mb_stride + 1
269
    int slice_type;
270
    int slice_type_fixed;
271

  
272
    //interlacing specific flags
273
    int mb_aff_frame;
274
    int mb_field_decoding_flag;
275
    int mb_mbaff;              ///< mb_aff_frame && mb_field_decoding_flag
276

  
277
    unsigned int sub_mb_type[4];
278

  
279
    //POC stuff
280
    int poc_lsb;
281
    int poc_msb;
282
    int delta_poc_bottom;
283
    int delta_poc[2];
284
    int frame_num;
285
    int prev_poc_msb;             ///< poc_msb of the last reference pic for POC type 0
286
    int prev_poc_lsb;             ///< poc_lsb of the last reference pic for POC type 0
287
    int frame_num_offset;         ///< for POC type 2
288
    int prev_frame_num_offset;    ///< for POC type 2
289
    int prev_frame_num;           ///< frame_num of the last pic for POC type 1/2
290

  
291
    /**
292
     * frame_num for frames or 2*frame_num for field pics.
293
     */
294
    int curr_pic_num;
295

  
296
    /**
297
     * max_frame_num or 2*max_frame_num for field pics.
298
     */
299
    int max_pic_num;
300

  
301
    //Weighted pred stuff
302
    int use_weight;
303
    int use_weight_chroma;
304
    int luma_log2_weight_denom;
305
    int chroma_log2_weight_denom;
306
    int luma_weight[2][48];
307
    int luma_offset[2][48];
308
    int chroma_weight[2][48][2];
309
    int chroma_offset[2][48][2];
310
    int implicit_weight[48][48];
311

  
312
    //deblock
313
    int deblocking_filter;         ///< disable_deblocking_filter_idc with 1<->0
314
    int slice_alpha_c0_offset;
315
    int slice_beta_offset;
316

  
317
    int redundant_pic_count;
318

  
319
    int direct_spatial_mv_pred;
320
    int dist_scale_factor[16];
321
    int dist_scale_factor_field[32];
322
    int map_col_to_list0[2][16];
323
    int map_col_to_list0_field[2][32];
324

  
325
    /**
326
     * num_ref_idx_l0/1_active_minus1 + 1
327
     */
328
    unsigned int ref_count[2];   ///< counts frames or fields, depending on current mb mode
329
    unsigned int list_count;
330
    Picture *short_ref[32];
331
    Picture *long_ref[32];
332
    Picture default_ref_list[2][32];
333
    Picture ref_list[2][48];     ///< 0..15: frame refs, 16..47: mbaff field refs
334
    Picture *delayed_pic[18]; //FIXME size?
335
    Picture *delayed_output_pic;
336

  
337
    /**
338
     * memory management control operations buffer.
339
     */
340
    MMCO mmco[MAX_MMCO_COUNT];
341
    int mmco_index;
342

  
343
    int long_ref_count;  ///< number of actual long term references
344
    int short_ref_count; ///< number of actual short term references
345

  
346
    //data partitioning
347
    GetBitContext intra_gb;
348
    GetBitContext inter_gb;
349
    GetBitContext *intra_gb_ptr;
350
    GetBitContext *inter_gb_ptr;
351

  
352
    DECLARE_ALIGNED_8(DCTELEM, mb[16*24]);
353
    DCTELEM mb_padding[256];        ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not to large or ensure that there is some unused stuff after mb
354

  
355
    /**
356
     * Cabac
357
     */
358
    CABACContext cabac;
359
    uint8_t      cabac_state[460];
360
    int          cabac_init_idc;
361

  
362
    /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
363
    uint16_t     *cbp_table;
364
    int cbp;
365
    int top_cbp;
366
    int left_cbp;
367
    /* chroma_pred_mode for i4x4 or i16x16, else 0 */
368
    uint8_t     *chroma_pred_mode_table;
369
    int         last_qscale_diff;
370
    int16_t     (*mvd_table[2])[2];
371
    DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]);
372
    uint8_t     *direct_table;
373
    uint8_t     direct_cache[5*8];
374

  
375
    uint8_t zigzag_scan[16];
376
    uint8_t zigzag_scan8x8[64];
377
    uint8_t zigzag_scan8x8_cavlc[64];
378
    uint8_t field_scan[16];
379
    uint8_t field_scan8x8[64];
380
    uint8_t field_scan8x8_cavlc[64];
381
    const uint8_t *zigzag_scan_q0;
382
    const uint8_t *zigzag_scan8x8_q0;
383
    const uint8_t *zigzag_scan8x8_cavlc_q0;
384
    const uint8_t *field_scan_q0;
385
    const uint8_t *field_scan8x8_q0;
386
    const uint8_t *field_scan8x8_cavlc_q0;
387

  
388
    int x264_build;
389
}H264Context;
390

  
391 43
static VLC coeff_token_vlc[4];
392 44
static VLC chroma_dc_coeff_token_vlc;
393 45

  
......
7982 7634
    return 0;
7983 7635
}
7984 7636

  
7985
/**
7986
 * finds the end of the current frame in the bitstream.
7987
 * @return the position of the first byte of the next frame, or -1
7988
 */
7989
static int find_frame_end(H264Context *h, const uint8_t *buf, int buf_size){
7990
    int i;
7991
    uint32_t state;
7992
    ParseContext *pc = &(h->s.parse_context);
7993
//printf("first %02X%02X%02X%02X\n", buf[0], buf[1],buf[2],buf[3]);
7994
//    mb_addr= pc->mb_addr - 1;
7995
    state= pc->state;
7996
    if(state>13)
7997
        state= 7;
7998

  
7999
    for(i=0; i<buf_size; i++){
8000
        if(state==7){
8001
            for(; i<buf_size; i++){
8002
                if(!buf[i]){
8003
                    state=2;
8004
                    break;
8005
                }
8006
            }
8007
        }else if(state<=2){
8008
            if(buf[i]==1)   state^= 5; //2->7, 1->4, 0->5
8009
            else if(buf[i]) state = 7;
8010
            else            state>>=1; //2->1, 1->0, 0->0
8011
        }else if(state<=5){
8012
            int v= buf[i] & 0x1F;
8013
            if(v==7 || v==8 || v==9){
8014
                if(pc->frame_start_found){
8015
                    i++;
8016
found:
8017
                    pc->state=7;
8018
                    pc->frame_start_found= 0;
8019
                    return i-(state&5);
8020
                }
8021
            }else if(v==1 || v==2 || v==5){
8022
                if(pc->frame_start_found){
8023
                    state+=8;
8024
                    continue;
8025
                }else
8026
                    pc->frame_start_found = 1;
8027
            }
8028
            state= 7;
8029
        }else{
8030
            if(buf[i] & 0x80)
8031
                goto found;
8032
            state= 7;
8033
        }
8034
    }
8035
    pc->state= state;
8036
    return END_NOT_FOUND;
8037
}
8038

  
8039
#ifdef CONFIG_H264_PARSER
8040
static int h264_parse(AVCodecParserContext *s,
8041
                      AVCodecContext *avctx,
8042
                      const uint8_t **poutbuf, int *poutbuf_size,
8043
                      const uint8_t *buf, int buf_size)
8044
{
8045
    H264Context *h = s->priv_data;
8046
    ParseContext *pc = &h->s.parse_context;
8047
    int next;
8048

  
8049
    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
8050
        next= buf_size;
8051
    }else{
8052
        next= find_frame_end(h, buf, buf_size);
8053

  
8054
        if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
8055
            *poutbuf = NULL;
8056
            *poutbuf_size = 0;
8057
            return buf_size;
8058
        }
8059

  
8060
        if(next<0 && next != END_NOT_FOUND){
8061
            assert(pc->last_index + next >= 0 );
8062
            find_frame_end(h, &pc->buffer[pc->last_index + next], -next); //update state
8063
        }
8064
    }
8065

  
8066
    *poutbuf = buf;
8067
    *poutbuf_size = buf_size;
8068
    return next;
8069
}
8070

  
8071
static int h264_split(AVCodecContext *avctx,
8072
                      const uint8_t *buf, int buf_size)
8073
{
8074
    int i;
8075
    uint32_t state = -1;
8076
    int has_sps= 0;
8077

  
8078
    for(i=0; i<=buf_size; i++){
8079
        if((state&0xFFFFFF1F) == 0x107)
8080
            has_sps=1;
8081
/*        if((state&0xFFFFFF1F) == 0x101 || (state&0xFFFFFF1F) == 0x102 || (state&0xFFFFFF1F) == 0x105){
8082
        }*/
8083
        if((state&0xFFFFFF00) == 0x100 && (state&0xFFFFFF1F) != 0x107 && (state&0xFFFFFF1F) != 0x108 && (state&0xFFFFFF1F) != 0x109){
8084
            if(has_sps){
8085
                while(i>4 && buf[i-5]==0) i--;
8086
                return i-4;
8087
            }
8088
        }
8089
        if (i<buf_size)
8090
            state= (state<<8) | buf[i];
8091
    }
8092
    return 0;
8093
}
8094
#endif /* CONFIG_H264_PARSER */
8095

  
8096 7637
static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
8097 7638
    MpegEncContext * const s = &h->s;
8098 7639
    AVCodecContext * const avctx= s->avctx;
......
8301 7842
    }
8302 7843

  
8303 7844
    if(s->flags&CODEC_FLAG_TRUNCATED){
8304
        int next= find_frame_end(h, buf, buf_size);
7845
        int next= ff_h264_find_frame_end(h, buf, buf_size);
8305 7846

  
8306 7847
        if( ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
8307 7848
            return buf_size;
......
8692 8233
    .flush= flush_dpb,
8693 8234
};
8694 8235

  
8695
#ifdef CONFIG_H264_PARSER
8696
AVCodecParser h264_parser = {
8697
    { CODEC_ID_H264 },
8698
    sizeof(H264Context),
8699
    NULL,
8700
    h264_parse,
8701
    ff_parse_close,
8702
    h264_split,
8703
};
8704
#endif
8705

  
8706 8236
#include "svq3.c"

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