GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/atrac3plusdec.c Lines: 125 198 63.1 %
Date: 2021-04-18 10:33:33 Branches: 50 90 55.6 %

Line Branch Exec Source
1
/*
2
 * ATRAC3+ compatible decoder
3
 *
4
 * Copyright (c) 2010-2013 Maxim Poliakovski
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22
23
/**
24
 * @file
25
 * Sony ATRAC3+ compatible decoder.
26
 *
27
 * Container formats used to store its data:
28
 * RIFF WAV (.at3) and Sony OpenMG (.oma, .aa3).
29
 *
30
 * Technical description of this codec can be found here:
31
 * http://wiki.multimedia.cx/index.php?title=ATRAC3plus
32
 *
33
 * Kudos to Benjamin Larsson and Michael Karcher
34
 * for their precious technical help!
35
 */
36
37
#include <stdint.h>
38
#include <string.h>
39
40
#include "libavutil/channel_layout.h"
41
#include "libavutil/float_dsp.h"
42
#include "libavutil/mem_internal.h"
43
#include "libavutil/thread.h"
44
#include "avcodec.h"
45
#include "get_bits.h"
46
#include "internal.h"
47
#include "atrac.h"
48
#include "atrac3plus.h"
49
50
typedef struct ATRAC3PContext {
51
    GetBitContext gb;
52
    AVFloatDSPContext *fdsp;
53
54
    DECLARE_ALIGNED(32, float, samples)[2][ATRAC3P_FRAME_SAMPLES];  ///< quantized MDCT spectrum
55
    DECLARE_ALIGNED(32, float, mdct_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the IMDCT
56
    DECLARE_ALIGNED(32, float, time_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the gain compensation
57
    DECLARE_ALIGNED(32, float, outp_buf)[2][ATRAC3P_FRAME_SAMPLES];
58
59
    AtracGCContext gainc_ctx;   ///< gain compensation context
60
    FFTContext mdct_ctx;
61
    FFTContext ipqf_dct_ctx;    ///< IDCT context used by IPQF
62
63
    Atrac3pChanUnitCtx *ch_units;   ///< global channel units
64
65
    int num_channel_blocks;     ///< number of channel blocks
66
    uint8_t channel_blocks[5];  ///< channel configuration descriptor
67
    uint64_t my_channel_layout; ///< current channel layout
68
} ATRAC3PContext;
69
70
4
static av_cold int atrac3p_decode_close(AVCodecContext *avctx)
71
{
72
4
    ATRAC3PContext *ctx = avctx->priv_data;
73
74
4
    av_freep(&ctx->ch_units);
75
4
    av_freep(&ctx->fdsp);
76
77
4
    ff_mdct_end(&ctx->mdct_ctx);
78
4
    ff_mdct_end(&ctx->ipqf_dct_ctx);
79
80
4
    return 0;
81
}
82
83
4
static av_cold int set_channel_params(ATRAC3PContext *ctx,
84
                                      AVCodecContext *avctx)
85
{
86
4
    memset(ctx->channel_blocks, 0, sizeof(ctx->channel_blocks));
87
88


4
    switch (avctx->channels) {
89
    case 1:
90
        if (avctx->channel_layout != AV_CH_FRONT_LEFT)
91
            avctx->channel_layout = AV_CH_LAYOUT_MONO;
92
93
        ctx->num_channel_blocks = 1;
94
        ctx->channel_blocks[0]  = CH_UNIT_MONO;
95
        break;
96
4
    case 2:
97
4
        avctx->channel_layout   = AV_CH_LAYOUT_STEREO;
98
4
        ctx->num_channel_blocks = 1;
99
4
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
100
4
        break;
101
    case 3:
102
        avctx->channel_layout   = AV_CH_LAYOUT_SURROUND;
103
        ctx->num_channel_blocks = 2;
104
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
105
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
106
        break;
107
    case 4:
108
        avctx->channel_layout   = AV_CH_LAYOUT_4POINT0;
109
        ctx->num_channel_blocks = 3;
110
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
111
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
112
        ctx->channel_blocks[2]  = CH_UNIT_MONO;
113
        break;
114
    case 6:
115
        avctx->channel_layout   = AV_CH_LAYOUT_5POINT1_BACK;
116
        ctx->num_channel_blocks = 4;
117
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
118
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
119
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
120
        ctx->channel_blocks[3]  = CH_UNIT_MONO;
121
        break;
122
    case 7:
123
        avctx->channel_layout   = AV_CH_LAYOUT_6POINT1_BACK;
124
        ctx->num_channel_blocks = 5;
125
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
126
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
127
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
128
        ctx->channel_blocks[3]  = CH_UNIT_MONO;
129
        ctx->channel_blocks[4]  = CH_UNIT_MONO;
130
        break;
131
    case 8:
132
        avctx->channel_layout   = AV_CH_LAYOUT_7POINT1;
133
        ctx->num_channel_blocks = 5;
134
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
135
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
136
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
137
        ctx->channel_blocks[3]  = CH_UNIT_STEREO;
138
        ctx->channel_blocks[4]  = CH_UNIT_MONO;
139
        break;
140
    default:
141
        av_log(avctx, AV_LOG_ERROR,
142
               "Unsupported channel count: %d!\n", avctx->channels);
143
        return AVERROR_INVALIDDATA;
144
    }
145
146
4
    return 0;
147
}
148
149
2
static av_cold void atrac3p_init_static(void)
150
{
151
2
    ff_atrac3p_init_vlcs();
152
2
    ff_atrac3p_init_dsp_static();
153
2
}
154
155
4
static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
156
{
157
    static AVOnce init_static_once = AV_ONCE_INIT;
158
4
    ATRAC3PContext *ctx = avctx->priv_data;
159
    int i, ch, ret;
160
161
4
    if (!avctx->block_align) {
162
        av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
163
        return AVERROR(EINVAL);
164
    }
165
166
    /* initialize IPQF */
167
4
    ff_mdct_init(&ctx->ipqf_dct_ctx, 5, 1, 32.0 / 32768.0);
168
169
4
    ff_atrac3p_init_imdct(avctx, &ctx->mdct_ctx);
170
171
4
    ff_atrac_init_gain_compensation(&ctx->gainc_ctx, 6, 2);
172
173
4
    if ((ret = set_channel_params(ctx, avctx)) < 0)
174
        return ret;
175
176
4
    ctx->my_channel_layout = avctx->channel_layout;
177
178
4
    ctx->ch_units = av_mallocz_array(ctx->num_channel_blocks, sizeof(*ctx->ch_units));
179
4
    ctx->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
180
181

4
    if (!ctx->ch_units || !ctx->fdsp) {
182
        return AVERROR(ENOMEM);
183
    }
184
185
8
    for (i = 0; i < ctx->num_channel_blocks; i++) {
186
12
        for (ch = 0; ch < 2; ch++) {
187
8
            ctx->ch_units[i].channels[ch].ch_num          = ch;
188
8
            ctx->ch_units[i].channels[ch].wnd_shape       = &ctx->ch_units[i].channels[ch].wnd_shape_hist[0][0];
189
8
            ctx->ch_units[i].channels[ch].wnd_shape_prev  = &ctx->ch_units[i].channels[ch].wnd_shape_hist[1][0];
190
8
            ctx->ch_units[i].channels[ch].gain_data       = &ctx->ch_units[i].channels[ch].gain_data_hist[0][0];
191
8
            ctx->ch_units[i].channels[ch].gain_data_prev  = &ctx->ch_units[i].channels[ch].gain_data_hist[1][0];
192
8
            ctx->ch_units[i].channels[ch].tones_info      = &ctx->ch_units[i].channels[ch].tones_info_hist[0][0];
193
8
            ctx->ch_units[i].channels[ch].tones_info_prev = &ctx->ch_units[i].channels[ch].tones_info_hist[1][0];
194
        }
195
196
4
        ctx->ch_units[i].waves_info      = &ctx->ch_units[i].wave_synth_hist[0];
197
4
        ctx->ch_units[i].waves_info_prev = &ctx->ch_units[i].wave_synth_hist[1];
198
    }
199
200
4
    avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
201
202
4
    ff_thread_once(&init_static_once, atrac3p_init_static);
203
204
4
    return 0;
205
}
206
207
813
static void decode_residual_spectrum(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit,
208
                                     float out[2][ATRAC3P_FRAME_SAMPLES],
209
                                     int num_channels,
210
                                     AVCodecContext *avctx)
211
{
212
    int i, sb, ch, qu, nspeclines, RNG_index;
213
    float *dst, q;
214
    int16_t *src;
215
    /* calculate RNG table index for each subband */
216
813
    int sb_RNG_index[ATRAC3P_SUBBANDS] = { 0 };
217
218
813
    if (ch_unit->mute_flag) {
219
        for (ch = 0; ch < num_channels; ch++)
220
            memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
221
        return;
222
    }
223
224
22793
    for (qu = 0, RNG_index = 0; qu < ch_unit->used_quant_units; qu++)
225
21980
        RNG_index += ch_unit->channels[0].qu_sf_idx[qu] +
226
21980
                     ch_unit->channels[1].qu_sf_idx[qu];
227
228
10377
    for (sb = 0; sb < ch_unit->num_coded_subbands; sb++, RNG_index += 128)
229
9564
        sb_RNG_index[sb] = RNG_index & 0x3FC;
230
231
    /* inverse quant and power compensation */
232
2439
    for (ch = 0; ch < num_channels; ch++) {
233
        /* clear channel's residual spectrum */
234
1626
        memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
235
236
45586
        for (qu = 0; qu < ch_unit->used_quant_units; qu++) {
237
43960
            src        = &ch_unit->channels[ch].spectrum[ff_atrac3p_qu_to_spec_pos[qu]];
238
43960
            dst        = &out[ch][ff_atrac3p_qu_to_spec_pos[qu]];
239
43960
            nspeclines = ff_atrac3p_qu_to_spec_pos[qu + 1] -
240
43960
                         ff_atrac3p_qu_to_spec_pos[qu];
241
242
43960
            if (ch_unit->channels[ch].qu_wordlen[qu] > 0) {
243
43960
                q = ff_atrac3p_sf_tab[ch_unit->channels[ch].qu_sf_idx[qu]] *
244
43960
                    ff_atrac3p_mant_tab[ch_unit->channels[ch].qu_wordlen[qu]];
245
2492344
                for (i = 0; i < nspeclines; i++)
246
2448384
                    dst[i] = src[i] * q;
247
            }
248
        }
249
250
20754
        for (sb = 0; sb < ch_unit->num_coded_subbands; sb++)
251
19128
            ff_atrac3p_power_compensation(ch_unit, ctx->fdsp, ch, &out[ch][0],
252
                                          sb_RNG_index[sb], sb);
253
    }
254
255
813
    if (ch_unit->unit_type == CH_UNIT_STEREO) {
256
10377
        for (sb = 0; sb < ch_unit->num_coded_subbands; sb++) {
257
9564
            if (ch_unit->swap_channels[sb]) {
258
                for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
259
                    FFSWAP(float, out[0][sb * ATRAC3P_SUBBAND_SAMPLES + i],
260
                                  out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
261
            }
262
263
            /* flip coefficients' sign if requested */
264
9564
            if (ch_unit->negate_coeffs[sb])
265
                for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
266
                    out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i] = -(out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
267
        }
268
    }
269
}
270
271
813
static void reconstruct_frame(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit,
272
                              int num_channels, AVCodecContext *avctx)
273
{
274
    int ch, sb;
275
276
2439
    for (ch = 0; ch < num_channels; ch++) {
277
23298
        for (sb = 0; sb < ch_unit->num_subbands; sb++) {
278
            /* inverse transform and windowing */
279
21672
            ff_atrac3p_imdct(ctx->fdsp, &ctx->mdct_ctx,
280
21672
                             &ctx->samples[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
281
21672
                             &ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
282
21672
                             (ch_unit->channels[ch].wnd_shape_prev[sb] << 1) +
283
21672
                             ch_unit->channels[ch].wnd_shape[sb], sb);
284
285
            /* gain compensation and overlapping */
286
21672
            ff_atrac_gain_compensation(&ctx->gainc_ctx,
287
21672
                                       &ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
288
21672
                                       &ch_unit->prev_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
289
21672
                                       &ch_unit->channels[ch].gain_data_prev[sb],
290
21672
                                       &ch_unit->channels[ch].gain_data[sb],
291
                                       ATRAC3P_SUBBAND_SAMPLES,
292
21672
                                       &ctx->time_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES]);
293
        }
294
295
        /* zero unused subbands in both output and overlapping buffers */
296
1626
        memset(&ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
297
               0,
298
1626
               (ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
299
               ATRAC3P_SUBBAND_SAMPLES *
300
               sizeof(ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
301
1626
        memset(&ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
302
               0,
303
1626
               (ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
304
               ATRAC3P_SUBBAND_SAMPLES *
305
               sizeof(ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
306
307
        /* resynthesize and add tonal signal */
308
1626
        if (ch_unit->waves_info->tones_present ||
309
1626
            ch_unit->waves_info_prev->tones_present) {
310
            for (sb = 0; sb < ch_unit->num_subbands; sb++)
311
                if (ch_unit->channels[ch].tones_info[sb].num_wavs ||
312
                    ch_unit->channels[ch].tones_info_prev[sb].num_wavs) {
313
                    ff_atrac3p_generate_tones(ch_unit, ctx->fdsp, ch, sb,
314
                                              &ctx->time_buf[ch][sb * 128]);
315
                }
316
        }
317
318
        /* subband synthesis and acoustic signal output */
319
1626
        ff_atrac3p_ipqf(&ctx->ipqf_dct_ctx, &ch_unit->ipqf_ctx[ch],
320
1626
                        &ctx->time_buf[ch][0], &ctx->outp_buf[ch][0]);
321
    }
322
323
    /* swap window shape and gain control buffers. */
324
2439
    for (ch = 0; ch < num_channels; ch++) {
325
1626
        FFSWAP(uint8_t *, ch_unit->channels[ch].wnd_shape,
326
               ch_unit->channels[ch].wnd_shape_prev);
327
1626
        FFSWAP(AtracGainInfo *, ch_unit->channels[ch].gain_data,
328
               ch_unit->channels[ch].gain_data_prev);
329
1626
        FFSWAP(Atrac3pWavesData *, ch_unit->channels[ch].tones_info,
330
               ch_unit->channels[ch].tones_info_prev);
331
    }
332
333
813
    FFSWAP(Atrac3pWaveSynthParams *, ch_unit->waves_info, ch_unit->waves_info_prev);
334
813
}
335
336
813
static int atrac3p_decode_frame(AVCodecContext *avctx, void *data,
337
                                int *got_frame_ptr, AVPacket *avpkt)
338
{
339
813
    ATRAC3PContext *ctx = avctx->priv_data;
340
813
    AVFrame *frame      = data;
341
813
    int i, ret, ch_unit_id, ch_block = 0, out_ch_index = 0, channels_to_process;
342
813
    float **samples_p = (float **)frame->extended_data;
343
344
813
    frame->nb_samples = ATRAC3P_FRAME_SAMPLES;
345
813
    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
346
        return ret;
347
348
813
    if ((ret = init_get_bits8(&ctx->gb, avpkt->data, avpkt->size)) < 0)
349
        return ret;
350
351
813
    if (get_bits1(&ctx->gb)) {
352
        av_log(avctx, AV_LOG_ERROR, "Invalid start bit!\n");
353
        return AVERROR_INVALIDDATA;
354
    }
355
356
1626
    while (get_bits_left(&ctx->gb) >= 2 &&
357
1625
           (ch_unit_id = get_bits(&ctx->gb, 2)) != CH_UNIT_TERMINATOR) {
358
813
        if (ch_unit_id == CH_UNIT_EXTENSION) {
359
            avpriv_report_missing_feature(avctx, "Channel unit extension");
360
            return AVERROR_PATCHWELCOME;
361
        }
362
813
        if (ch_block >= ctx->num_channel_blocks ||
363
813
            ctx->channel_blocks[ch_block] != ch_unit_id) {
364
            av_log(avctx, AV_LOG_ERROR,
365
                   "Frame data doesn't match channel configuration!\n");
366
            return AVERROR_INVALIDDATA;
367
        }
368
369
813
        ctx->ch_units[ch_block].unit_type = ch_unit_id;
370
813
        channels_to_process               = ch_unit_id + 1;
371
372
813
        if ((ret = ff_atrac3p_decode_channel_unit(&ctx->gb,
373
813
                                                  &ctx->ch_units[ch_block],
374
                                                  channels_to_process,
375
                                                  avctx)) < 0)
376
            return ret;
377
378
813
        decode_residual_spectrum(ctx, &ctx->ch_units[ch_block], ctx->samples,
379
                                 channels_to_process, avctx);
380
813
        reconstruct_frame(ctx, &ctx->ch_units[ch_block],
381
                          channels_to_process, avctx);
382
383
2439
        for (i = 0; i < channels_to_process; i++)
384
1626
            memcpy(samples_p[out_ch_index + i], ctx->outp_buf[i],
385
                   ATRAC3P_FRAME_SAMPLES * sizeof(**samples_p));
386
387
813
        ch_block++;
388
813
        out_ch_index += channels_to_process;
389
    }
390
391
813
    *got_frame_ptr = 1;
392
393
813
    return avctx->codec_id == AV_CODEC_ID_ATRAC3P ? FFMIN(avctx->block_align, avpkt->size) : avpkt->size;
394
}
395
396
AVCodec ff_atrac3p_decoder = {
397
    .name           = "atrac3plus",
398
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
399
    .type           = AVMEDIA_TYPE_AUDIO,
400
    .id             = AV_CODEC_ID_ATRAC3P,
401
    .capabilities   = AV_CODEC_CAP_DR1,
402
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
403
    .priv_data_size = sizeof(ATRAC3PContext),
404
    .init           = atrac3p_decode_init,
405
    .close          = atrac3p_decode_close,
406
    .decode         = atrac3p_decode_frame,
407
};
408
409
AVCodec ff_atrac3pal_decoder = {
410
    .name           = "atrac3plusal",
411
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless)"),
412
    .type           = AVMEDIA_TYPE_AUDIO,
413
    .id             = AV_CODEC_ID_ATRAC3PAL,
414
    .capabilities   = AV_CODEC_CAP_DR1,
415
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
416
    .priv_data_size = sizeof(ATRAC3PContext),
417
    .init           = atrac3p_decode_init,
418
    .close          = atrac3p_decode_close,
419
    .decode         = atrac3p_decode_frame,
420
};