aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/libfdk-aacdec.c
blob: bc3802c5c34e39bf4a560809ec8c067440cdf196 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
/*
 * AAC decoder wrapper
 * Copyright (c) 2012 Martin Storsjo
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <fdk-aac/aacdecoder_lib.h>

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"

enum ConcealMethod {
    CONCEAL_METHOD_DEFAULT              = -1,
    CONCEAL_METHOD_SPECTRAL_MUTING      =  0,
    CONCEAL_METHOD_NOISE_SUBSTITUTION   =  1,
    CONCEAL_METHOD_ENERGY_INTERPOLATION =  2,
    CONCEAL_METHOD_NB,
};

typedef struct FDKAACDecContext {
    const AVClass *class;
    HANDLE_AACDECODER handle;
    int initialized;
    enum ConcealMethod conceal_method;
} FDKAACDecContext;

#define OFFSET(x) offsetof(FDKAACDecContext, x)
#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption fdk_aac_dec_options[] = {
    { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_DEFAULT }, CONCEAL_METHOD_DEFAULT, CONCEAL_METHOD_NB - 1, AD, "conceal" },
    { "default",  "Default",              0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_DEFAULT },              INT_MIN, INT_MAX, AD, "conceal" },
    { "spectral", "Spectral muting",      0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING },      INT_MIN, INT_MAX, AD, "conceal" },
    { "noise",    "Noise Substitution",   0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION },   INT_MIN, INT_MAX, AD, "conceal" },
    { "energy",   "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
    { NULL }
};

static const AVClass fdk_aac_dec_class = {
    "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
};

static int get_stream_info(AVCodecContext *avctx)
{
    FDKAACDecContext *s   = avctx->priv_data;
    CStreamInfo *info     = aacDecoder_GetStreamInfo(s->handle);
    int channel_counts[9] = { 0 };
    int i, ch_error       = 0;
    uint64_t ch_layout    = 0;

    if (!info) {
        av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
        return AVERROR_UNKNOWN;
    }

    if (info->sampleRate <= 0) {
        av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
        return AVERROR_UNKNOWN;
    }
    avctx->sample_rate = info->sampleRate;
    avctx->frame_size  = info->frameSize;

    for (i = 0; i < info->numChannels; i++) {
        AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
        if (ctype <= ACT_NONE || ctype > ACT_TOP) {
            av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
            break;
        }
        channel_counts[ctype]++;
    }
    av_log(avctx, AV_LOG_DEBUG,
           "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
           info->numChannels,
           channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
           channel_counts[ACT_BACK],  channel_counts[ACT_LFE],
           channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
           channel_counts[ACT_BACK_TOP]  + channel_counts[ACT_TOP]);

    switch (channel_counts[ACT_FRONT]) {
    case 4:
        ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
                     AV_CH_FRONT_RIGHT_OF_CENTER;
        break;
    case 3:
        ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;
        break;
    case 2:
        ch_layout |= AV_CH_LAYOUT_STEREO;
        break;
    case 1:
        ch_layout |= AV_CH_FRONT_CENTER;
        break;
    default:
        av_log(avctx, AV_LOG_WARNING,
               "unsupported number of front channels: %d\n",
               channel_counts[ACT_FRONT]);
        ch_error = 1;
        break;
    }
    if (channel_counts[ACT_SIDE] > 0) {
        if (channel_counts[ACT_SIDE] == 2) {
            ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
        } else {
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of side channels: %d\n",
                   channel_counts[ACT_SIDE]);
            ch_error = 1;
        }
    }
    if (channel_counts[ACT_BACK] > 0) {
        switch (channel_counts[ACT_BACK]) {
        case 3:
            ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;
            break;
        case 2:
            ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
            break;
        case 1:
            ch_layout |= AV_CH_BACK_CENTER;
            break;
        default:
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of back channels: %d\n",
                   channel_counts[ACT_BACK]);
            ch_error = 1;
            break;
        }
    }
    if (channel_counts[ACT_LFE] > 0) {
        if (channel_counts[ACT_LFE] == 1) {
            ch_layout |= AV_CH_LOW_FREQUENCY;
        } else {
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of LFE channels: %d\n",
                   channel_counts[ACT_LFE]);
            ch_error = 1;
        }
    }
    if (!ch_error &&
        av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
        av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
        ch_error = 1;
    }
    if (ch_error)
        avctx->channel_layout = 0;
    else
        avctx->channel_layout = ch_layout;

    avctx->channels = info->numChannels;

    return 0;
}

static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;

    if (s->handle)
        aacDecoder_Close(s->handle);

    return 0;
}

static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;
    AAC_DECODER_ERROR err;

    s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
    if (!s->handle) {
        av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
        return AVERROR_UNKNOWN;
    }

    if (avctx->extradata_size) {
        if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
                                        &avctx->extradata_size)) != AAC_DEC_OK) {
            av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
            return AVERROR_INVALIDDATA;
        }
    }

    if (s->conceal_method != CONCEAL_METHOD_DEFAULT) {
        if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
                                       s->conceal_method)) != AAC_DEC_OK) {
            av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
            return AVERROR_UNKNOWN;
        }
    }

    avctx->sample_fmt = AV_SAMPLE_FMT_S16;

    return 0;
}

static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame_ptr, AVPacket *avpkt)
{
    FDKAACDecContext *s = avctx->priv_data;
    AVFrame *frame = data;
    int ret;
    AAC_DECODER_ERROR err;
    UINT valid = avpkt->size;
    uint8_t *buf, *tmpptr = NULL;
    int buf_size;

    err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
    if (err != AAC_DEC_OK) {
        av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
        return AVERROR_INVALIDDATA;
    }

    if (s->initialized) {
        frame->nb_samples = avctx->frame_size;
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
            av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
            return ret;
        }
        buf = frame->extended_data[0];
        buf_size = avctx->channels * frame->nb_samples *
                   av_get_bytes_per_sample(avctx->sample_fmt);
    } else {
        buf_size = 50 * 1024;
        buf = tmpptr = av_malloc(buf_size);
        if (!buf)
            return AVERROR(ENOMEM);
    }

    err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
    if (err == AAC_DEC_NOT_ENOUGH_BITS) {
        ret = avpkt->size - valid;
        goto end;
    }
    if (err != AAC_DEC_OK) {
        av_log(avctx, AV_LOG_ERROR,
               "aacDecoder_DecodeFrame() failed: %x\n", err);
        ret = AVERROR_UNKNOWN;
        goto end;
    }

    if (!s->initialized) {
        if ((ret = get_stream_info(avctx)) < 0)
            goto end;
        s->initialized = 1;
        frame->nb_samples = avctx->frame_size;
    }

    if (tmpptr) {
        frame->nb_samples = avctx->frame_size;
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
            av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
            goto end;
        }
        memcpy(frame->extended_data[0], tmpptr,
               avctx->channels * avctx->frame_size *
               av_get_bytes_per_sample(avctx->sample_fmt));
    }

    *got_frame_ptr = 1;
    ret = avpkt->size - valid;

end:
    av_free(tmpptr);
    return ret;
}

static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;
    AAC_DECODER_ERROR err;

    if (!s->handle)
        return;

    if ((err = aacDecoder_SetParam(s->handle,
                                   AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
        av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
}

AVCodec ff_libfdk_aac_decoder = {
    .name           = "libfdk_aac",
    .long_name      = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_AAC,
    .priv_data_size = sizeof(FDKAACDecContext),
    .init           = fdk_aac_decode_init,
    .decode         = fdk_aac_decode_frame,
    .close          = fdk_aac_decode_close,
    .flush          = fdk_aac_decode_flush,
    .capabilities   = CODEC_CAP_DR1,
    .priv_class     = &fdk_aac_dec_class,
};