Statistics
| Branch: | Revision:

ffmpeg / libavcodec / dvdata.c @ 2912e87a

History | View | Annotate | Download (9.7 KB)

1
/*
2
 * Constants for DV codec
3
 * Copyright (c) 2002 Fabrice Bellard
4
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * Libav is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with Libav; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
/**
23
 * @file
24
 * Constants for DV codec.
25
 */
26

    
27
#include "libavutil/rational.h"
28
#include "avcodec.h"
29
#include "dvdata.h"
30

    
31
static DVwork_chunk work_chunks_dv25pal   [1*12*27];
32
static DVwork_chunk work_chunks_dv25pal411[1*12*27];
33
static DVwork_chunk work_chunks_dv25ntsc  [1*10*27];
34
static DVwork_chunk work_chunks_dv50pal   [2*12*27];
35
static DVwork_chunk work_chunks_dv50ntsc  [2*10*27];
36
static DVwork_chunk work_chunks_dv100palp [2*12*27];
37
static DVwork_chunk work_chunks_dv100ntscp[2*10*27];
38
static DVwork_chunk work_chunks_dv100pali [4*12*27];
39
static DVwork_chunk work_chunks_dv100ntsci[4*10*27];
40

    
41
static uint32_t dv_idct_factor_sd    [2*2*22*64];
42
static uint32_t dv_idct_factor_hd1080[2*4*16*64];
43
static uint32_t dv_idct_factor_hd720 [2*4*16*64];
44

    
45
static const DVprofile dv_profiles[] = {
46
    { .dsf = 0,
47
      .video_stype = 0x0,
48
      .frame_size = 120000,        /* IEC 61834, SMPTE-314M - 525/60 (NTSC) */
49
      .difseg_size = 10,
50
      .n_difchan = 1,
51
      .time_base = { 1001, 30000 },
52
      .ltc_divisor = 30,
53
      .height = 480,
54
      .width = 720,
55
      .sar = {{8, 9}, {32, 27}},
56
      .work_chunks = &work_chunks_dv25ntsc[0],
57
      .idct_factor = &dv_idct_factor_sd[0],
58
      .pix_fmt = PIX_FMT_YUV411P,
59
      .bpm = 6,
60
      .block_sizes = block_sizes_dv2550,
61
      .audio_stride = 90,
62
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
63
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
64
      .audio_shuffle = dv_audio_shuffle525,
65
    },
66
    { .dsf = 1,
67
      .video_stype = 0x0,
68
      .frame_size = 144000,        /* IEC 61834 - 625/50 (PAL) */
69
      .difseg_size = 12,
70
      .n_difchan = 1,
71
      .time_base = { 1, 25 },
72
      .ltc_divisor = 25,
73
      .height = 576,
74
      .width = 720,
75
      .sar = {{16, 15}, {64, 45}},
76
      .work_chunks = &work_chunks_dv25pal[0],
77
      .idct_factor = &dv_idct_factor_sd[0],
78
      .pix_fmt = PIX_FMT_YUV420P,
79
      .bpm = 6,
80
      .block_sizes = block_sizes_dv2550,
81
      .audio_stride = 108,
82
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
83
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
84
      .audio_shuffle = dv_audio_shuffle625,
85
    },
86
    { .dsf = 1,
87
      .video_stype = 0x0,
88
      .frame_size = 144000,        /* SMPTE-314M - 625/50 (PAL) */
89
      .difseg_size = 12,
90
      .n_difchan = 1,
91
      .time_base = { 1, 25 },
92
      .ltc_divisor = 25,
93
      .height = 576,
94
      .width = 720,
95
      .sar = {{16, 15}, {64, 45}},
96
      .work_chunks = &work_chunks_dv25pal411[0],
97
      .idct_factor = &dv_idct_factor_sd[0],
98
      .pix_fmt = PIX_FMT_YUV411P,
99
      .bpm = 6,
100
      .block_sizes = block_sizes_dv2550,
101
      .audio_stride = 108,
102
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
103
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
104
      .audio_shuffle = dv_audio_shuffle625,
105
    },
106
    { .dsf = 0,
107
      .video_stype = 0x4,
108
      .frame_size = 240000,        /* SMPTE-314M - 525/60 (NTSC) 50 Mbps */
109
      .difseg_size = 10,           /* also known as "DVCPRO50" */
110
      .n_difchan = 2,
111
      .time_base = { 1001, 30000 },
112
      .ltc_divisor = 30,
113
      .height = 480,
114
      .width = 720,
115
      .sar = {{8, 9}, {32, 27}},
116
      .work_chunks = &work_chunks_dv50ntsc[0],
117
      .idct_factor = &dv_idct_factor_sd[0],
118
      .pix_fmt = PIX_FMT_YUV422P,
119
      .bpm = 6,
120
      .block_sizes = block_sizes_dv2550,
121
      .audio_stride = 90,
122
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
123
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
124
      .audio_shuffle = dv_audio_shuffle525,
125
    },
126
    { .dsf = 1,
127
      .video_stype = 0x4,
128
      .frame_size = 288000,        /* SMPTE-314M - 625/50 (PAL) 50 Mbps */
129
      .difseg_size = 12,           /* also known as "DVCPRO50" */
130
      .n_difchan = 2,
131
      .time_base = { 1, 25 },
132
      .ltc_divisor = 25,
133
      .height = 576,
134
      .width = 720,
135
      .sar = {{16, 15}, {64, 45}},
136
      .work_chunks = &work_chunks_dv50pal[0],
137
      .idct_factor = &dv_idct_factor_sd[0],
138
      .pix_fmt = PIX_FMT_YUV422P,
139
      .bpm = 6,
140
      .block_sizes = block_sizes_dv2550,
141
      .audio_stride = 108,
142
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
143
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
144
      .audio_shuffle = dv_audio_shuffle625,
145
    },
146
    { .dsf = 0,
147
      .video_stype = 0x14,
148
      .frame_size = 480000,        /* SMPTE-370M - 1080i60 100 Mbps */
149
      .difseg_size = 10,           /* also known as "DVCPRO HD" */
150
      .n_difchan = 4,
151
      .time_base = { 1001, 30000 },
152
      .ltc_divisor = 30,
153
      .height = 1080,
154
      .width = 1280,
155
      .sar = {{1, 1}, {3, 2}},
156
      .work_chunks = &work_chunks_dv100ntsci[0],
157
      .idct_factor = &dv_idct_factor_hd1080[0],
158
      .pix_fmt = PIX_FMT_YUV422P,
159
      .bpm = 8,
160
      .block_sizes = block_sizes_dv100,
161
      .audio_stride = 90,
162
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
163
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
164
      .audio_shuffle = dv_audio_shuffle525,
165
    },
166
    { .dsf = 1,
167
      .video_stype = 0x14,
168
      .frame_size = 576000,        /* SMPTE-370M - 1080i50 100 Mbps */
169
      .difseg_size = 12,           /* also known as "DVCPRO HD" */
170
      .n_difchan = 4,
171
      .time_base = { 1, 25 },
172
      .ltc_divisor = 25,
173
      .height = 1080,
174
      .width = 1440,
175
      .sar = {{1, 1}, {4, 3}},
176
      .work_chunks = &work_chunks_dv100pali[0],
177
      .idct_factor = &dv_idct_factor_hd1080[0],
178
      .pix_fmt = PIX_FMT_YUV422P,
179
      .bpm = 8,
180
      .block_sizes = block_sizes_dv100,
181
      .audio_stride = 108,
182
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
183
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
184
      .audio_shuffle = dv_audio_shuffle625,
185
    },
186
    { .dsf = 0,
187
      .video_stype = 0x18,
188
      .frame_size = 240000,        /* SMPTE-370M - 720p60 100 Mbps */
189
      .difseg_size = 10,           /* also known as "DVCPRO HD" */
190
      .n_difchan = 2,
191
      .time_base = { 1001, 60000 },
192
      .ltc_divisor = 60,
193
      .height = 720,
194
      .width = 960,
195
      .sar = {{1, 1}, {4, 3}},
196
      .work_chunks = &work_chunks_dv100ntscp[0],
197
      .idct_factor = &dv_idct_factor_hd720[0],
198
      .pix_fmt = PIX_FMT_YUV422P,
199
      .bpm = 8,
200
      .block_sizes = block_sizes_dv100,
201
      .audio_stride = 90,
202
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
203
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
204
      .audio_shuffle = dv_audio_shuffle525,
205
    },
206
    { .dsf = 1,
207
      .video_stype = 0x18,
208
      .frame_size = 288000,        /* SMPTE-370M - 720p50 100 Mbps */
209
      .difseg_size = 12,           /* also known as "DVCPRO HD" */
210
      .n_difchan = 2,
211
      .time_base = { 1, 50 },
212
      .ltc_divisor = 50,
213
      .height = 720,
214
      .width = 960,
215
      .sar = {{1, 1}, {4, 3}},
216
      .work_chunks = &work_chunks_dv100palp[0],
217
      .idct_factor = &dv_idct_factor_hd720[0],
218
      .pix_fmt = PIX_FMT_YUV422P,
219
      .bpm = 8,
220
      .block_sizes = block_sizes_dv100,
221
      .audio_stride = 90,
222
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
223
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
224
      .audio_shuffle = dv_audio_shuffle625,
225
    },
226
    { .dsf = 1,
227
      .video_stype = 0x1,
228
      .frame_size = 144000,        /* IEC 61883-5 - 625/50 (PAL) */
229
      .difseg_size = 12,
230
      .n_difchan = 1,
231
      .time_base = { 1, 25 },
232
      .ltc_divisor = 25,
233
      .height = 576,
234
      .width = 720,
235
      .sar = {{16, 15}, {64, 45}},
236
      .work_chunks = &work_chunks_dv25pal[0],
237
      .idct_factor = &dv_idct_factor_sd[0],
238
      .pix_fmt = PIX_FMT_YUV420P,
239
      .bpm = 6,
240
      .block_sizes = block_sizes_dv2550,
241
      .audio_stride = 108,
242
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
243
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
244
      .audio_shuffle = dv_audio_shuffle625,
245
    }
246
};
247

    
248
const DVprofile* ff_dv_frame_profile(const DVprofile *sys,
249
                                  const uint8_t* frame, unsigned buf_size)
250
{
251
   int i;
252

    
253
   int dsf = (frame[3] & 0x80) >> 7;
254

    
255
   int stype = frame[80*5 + 48 + 3] & 0x1f;
256

    
257
   /* 576i50 25Mbps 4:1:1 is a special case */
258
   if (dsf == 1 && stype == 0 && frame[4] & 0x07 /* the APT field */) {
259
       return &dv_profiles[2];
260
   }
261

    
262
   for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)
263
       if (dsf == dv_profiles[i].dsf && stype == dv_profiles[i].video_stype)
264
           return &dv_profiles[i];
265

    
266
   /* check if old sys matches and assumes corrupted input */
267
   if (sys && buf_size == sys->frame_size)
268
       return sys;
269

    
270
   return NULL;
271
}
272

    
273
const DVprofile* ff_dv_codec_profile(AVCodecContext* codec)
274
{
275
    int i;
276

    
277
    for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)
278
       if (codec->height  == dv_profiles[i].height  &&
279
           codec->pix_fmt == dv_profiles[i].pix_fmt &&
280
           codec->width   == dv_profiles[i].width)
281
               return &dv_profiles[i];
282

    
283
    return NULL;
284
}
285