GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/idctdsp.c Lines: 130 173 75.1 %
Date: 2019-11-22 03:34:36 Branches: 48 61 78.7 %

Line Branch Exec Source
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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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19
#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "avcodec.h"
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#include "dct.h"
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#include "faanidct.h"
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#include "idctdsp.h"
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#include "simple_idct.h"
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#include "xvididct.h"
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29
40776
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st,
30
                               const uint8_t *src_scantable)
31
{
32
    int i, end;
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34
40776
    st->scantable = src_scantable;
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36
2650440
    for (i = 0; i < 64; i++) {
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2609664
        int j = src_scantable[i];
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2609664
        st->permutated[i] = permutation[j];
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    }
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41
40776
    end = -1;
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2650440
    for (i = 0; i < 64; i++) {
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2609664
        int j = st->permutated[i];
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2609664
        if (j > end)
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549873
            end = j;
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2609664
        st->raster_end[i] = end;
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    }
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40776
}
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50
1757
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation,
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                                           enum idct_permutation_type perm_type)
52
{
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    int i;
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55
    if (ARCH_X86)
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1757
        if (ff_init_scantable_permutation_x86(idct_permutation,
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                                              perm_type))
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4
            return;
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60

1753
    switch (perm_type) {
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1482
    case FF_IDCT_PERM_NONE:
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96330
        for (i = 0; i < 64; i++)
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94848
            idct_permutation[i] = i;
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1482
        break;
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4
    case FF_IDCT_PERM_LIBMPEG2:
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260
        for (i = 0; i < 64; i++)
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256
            idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
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4
        break;
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267
    case FF_IDCT_PERM_TRANSPOSE:
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17355
        for (i = 0; i < 64; i++)
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17088
            idct_permutation[i] = ((i & 7) << 3) | (i >> 3);
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267
        break;
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    case FF_IDCT_PERM_PARTTRANS:
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        for (i = 0; i < 64; i++)
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            idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3);
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        break;
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    default:
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        av_log(NULL, AV_LOG_ERROR,
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               "Internal error, IDCT permutation not set\n");
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    }
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}
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141450
void ff_put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels,
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                             ptrdiff_t line_size)
85
{
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    int i;
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88
    /* read the pixels */
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1273050
    for (i = 0; i < 8; i++) {
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1131600
        pixels[0] = av_clip_uint8(block[0]);
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1131600
        pixels[1] = av_clip_uint8(block[1]);
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1131600
        pixels[2] = av_clip_uint8(block[2]);
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1131600
        pixels[3] = av_clip_uint8(block[3]);
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1131600
        pixels[4] = av_clip_uint8(block[4]);
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1131600
        pixels[5] = av_clip_uint8(block[5]);
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1131600
        pixels[6] = av_clip_uint8(block[6]);
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1131600
        pixels[7] = av_clip_uint8(block[7]);
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1131600
        pixels += line_size;
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1131600
        block  += 8;
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    }
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141450
}
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14262
static void put_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels,
105
                                 int line_size)
106
{
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    int i;
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109
    /* read the pixels */
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71310
    for(i=0;i<4;i++) {
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57048
        pixels[0] = av_clip_uint8(block[0]);
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57048
        pixels[1] = av_clip_uint8(block[1]);
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57048
        pixels[2] = av_clip_uint8(block[2]);
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57048
        pixels[3] = av_clip_uint8(block[3]);
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116
57048
        pixels += line_size;
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57048
        block += 8;
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    }
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14262
}
120
121
static void put_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels,
122
                                 int line_size)
123
{
124
    int i;
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126
    /* read the pixels */
127
    for(i=0;i<2;i++) {
128
        pixels[0] = av_clip_uint8(block[0]);
129
        pixels[1] = av_clip_uint8(block[1]);
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131
        pixels += line_size;
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        block += 8;
133
    }
134
}
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1027936
static void put_signed_pixels_clamped_c(const int16_t *block,
137
                                        uint8_t *av_restrict pixels,
138
                                        ptrdiff_t line_size)
139
{
140
    int i, j;
141
142
9251424
    for (i = 0; i < 8; i++) {
143
74011392
        for (j = 0; j < 8; j++) {
144
65787904
            if (*block < -128)
145
73
                *pixels = 0;
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65787831
            else if (*block > 127)
147
43966
                *pixels = 255;
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            else
149
65743865
                *pixels = (uint8_t) (*block + 128);
150
65787904
            block++;
151
65787904
            pixels++;
152
        }
153
8223488
        pixels += (line_size - 8);
154
    }
155
1027936
}
156
157
451709
void ff_add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels,
158
                             ptrdiff_t line_size)
159
{
160
    int i;
161
162
    /* read the pixels */
163
4065381
    for (i = 0; i < 8; i++) {
164
3613672
        pixels[0] = av_clip_uint8(pixels[0] + block[0]);
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3613672
        pixels[1] = av_clip_uint8(pixels[1] + block[1]);
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3613672
        pixels[2] = av_clip_uint8(pixels[2] + block[2]);
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3613672
        pixels[3] = av_clip_uint8(pixels[3] + block[3]);
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3613672
        pixels[4] = av_clip_uint8(pixels[4] + block[4]);
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3613672
        pixels[5] = av_clip_uint8(pixels[5] + block[5]);
170
3613672
        pixels[6] = av_clip_uint8(pixels[6] + block[6]);
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3613672
        pixels[7] = av_clip_uint8(pixels[7] + block[7]);
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3613672
        pixels   += line_size;
173
3613672
        block    += 8;
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    }
175
451709
}
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177
73763
static void add_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels,
178
                          int line_size)
179
{
180
    int i;
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182
    /* read the pixels */
183
368815
    for(i=0;i<4;i++) {
184
295052
        pixels[0] = av_clip_uint8(pixels[0] + block[0]);
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295052
        pixels[1] = av_clip_uint8(pixels[1] + block[1]);
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295052
        pixels[2] = av_clip_uint8(pixels[2] + block[2]);
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295052
        pixels[3] = av_clip_uint8(pixels[3] + block[3]);
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295052
        pixels += line_size;
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295052
        block += 8;
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    }
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73763
}
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193
static void add_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels,
194
                          int line_size)
195
{
196
    int i;
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    /* read the pixels */
199
    for(i=0;i<2;i++) {
200
        pixels[0] = av_clip_uint8(pixels[0] + block[0]);
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        pixels[1] = av_clip_uint8(pixels[1] + block[1]);
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        pixels += line_size;
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        block += 8;
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    }
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}
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14262
static void ff_jref_idct4_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
208
{
209
14262
    ff_j_rev_dct4 (block);
210
14262
    put_pixels_clamped4_c(block, dest, line_size);
211
14262
}
212
73763
static void ff_jref_idct4_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
213
{
214
73763
    ff_j_rev_dct4 (block);
215
73763
    add_pixels_clamped4_c(block, dest, line_size);
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73763
}
217
218
static void ff_jref_idct2_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
219
{
220
    ff_j_rev_dct2 (block);
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    put_pixels_clamped2_c(block, dest, line_size);
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}
223
static void ff_jref_idct2_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
224
{
225
    ff_j_rev_dct2 (block);
226
    add_pixels_clamped2_c(block, dest, line_size);
227
}
228
229
static void ff_jref_idct1_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
230
{
231
    dest[0] = av_clip_uint8((block[0] + 4)>>3);
232
}
233
static void ff_jref_idct1_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
234
{
235
    dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3));
236
}
237
238
1552
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
239
{
240
1552
    const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
241
242
1552
    if (avctx->lowres==1) {
243
2
        c->idct_put  = ff_jref_idct4_put;
244
2
        c->idct_add  = ff_jref_idct4_add;
245
2
        c->idct      = ff_j_rev_dct4;
246
2
        c->perm_type = FF_IDCT_PERM_NONE;
247
1550
    } else if (avctx->lowres==2) {
248
        c->idct_put  = ff_jref_idct2_put;
249
        c->idct_add  = ff_jref_idct2_add;
250
        c->idct      = ff_j_rev_dct2;
251
        c->perm_type = FF_IDCT_PERM_NONE;
252
1550
    } else if (avctx->lowres==3) {
253
        c->idct_put  = ff_jref_idct1_put;
254
        c->idct_add  = ff_jref_idct1_add;
255
        c->idct      = ff_j_rev_dct1;
256
        c->perm_type = FF_IDCT_PERM_NONE;
257
    } else {
258

1550
        if (avctx->bits_per_raw_sample == 10 || avctx->bits_per_raw_sample == 9) {
259
            /* 10-bit MPEG-4 Simple Studio Profile requires a higher precision IDCT
260
               However, it only uses idct_put */
261
23
            if (c->mpeg4_studio_profile) {
262
                c->idct_put              = ff_simple_idct_put_int32_10bit;
263
                c->idct_add              = NULL;
264
                c->idct                  = NULL;
265
            } else {
266
23
                c->idct_put              = ff_simple_idct_put_int16_10bit;
267
23
                c->idct_add              = ff_simple_idct_add_int16_10bit;
268
23
                c->idct                  = ff_simple_idct_int16_10bit;
269
            }
270
23
            c->perm_type             = FF_IDCT_PERM_NONE;
271
1527
        } else if (avctx->bits_per_raw_sample == 12) {
272
4
            c->idct_put              = ff_simple_idct_put_int16_12bit;
273
4
            c->idct_add              = ff_simple_idct_add_int16_12bit;
274
4
            c->idct                  = ff_simple_idct_int16_12bit;
275
4
            c->perm_type             = FF_IDCT_PERM_NONE;
276
        } else {
277
1523
            if (avctx->idct_algo == FF_IDCT_INT) {
278
4
                c->idct_put  = ff_jref_idct_put;
279
4
                c->idct_add  = ff_jref_idct_add;
280
4
                c->idct      = ff_j_rev_dct;
281
4
                c->perm_type = FF_IDCT_PERM_LIBMPEG2;
282
#if CONFIG_FAANIDCT
283
1519
            } else if (avctx->idct_algo == FF_IDCT_FAAN) {
284
                c->idct_put  = ff_faanidct_put;
285
                c->idct_add  = ff_faanidct_add;
286
                c->idct      = ff_faanidct;
287
                c->perm_type = FF_IDCT_PERM_NONE;
288
#endif /* CONFIG_FAANIDCT */
289
            } else { // accurate/default
290
                /* Be sure FF_IDCT_NONE will select this one, since it uses FF_IDCT_PERM_NONE */
291
1519
                c->idct_put  = ff_simple_idct_put_int16_8bit;
292
1519
                c->idct_add  = ff_simple_idct_add_int16_8bit;
293
1519
                c->idct      = ff_simple_idct_int16_8bit;
294
1519
                c->perm_type = FF_IDCT_PERM_NONE;
295
            }
296
        }
297
    }
298
299
1552
    c->put_pixels_clamped        = ff_put_pixels_clamped_c;
300
1552
    c->put_signed_pixels_clamped = put_signed_pixels_clamped_c;
301
1552
    c->add_pixels_clamped        = ff_add_pixels_clamped_c;
302
303
1552
    if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVID)
304
4
        ff_xvid_idct_init(c, avctx);
305
306
    if (ARCH_AARCH64)
307
        ff_idctdsp_init_aarch64(c, avctx, high_bit_depth);
308
    if (ARCH_ALPHA)
309
        ff_idctdsp_init_alpha(c, avctx, high_bit_depth);
310
    if (ARCH_ARM)
311
        ff_idctdsp_init_arm(c, avctx, high_bit_depth);
312
    if (ARCH_PPC)
313
        ff_idctdsp_init_ppc(c, avctx, high_bit_depth);
314
    if (ARCH_X86)
315
1552
        ff_idctdsp_init_x86(c, avctx, high_bit_depth);
316
    if (ARCH_MIPS)
317
        ff_idctdsp_init_mips(c, avctx, high_bit_depth);
318
319
1552
    ff_init_scantable_permutation(c->idct_permutation,
320
                                  c->perm_type);
321
1552
}