libfdk-aacdec.c 9.96 KB
Newer Older
1 2 3 4
/*
 * AAC decoder wrapper
 * Copyright (c) 2012 Martin Storsjo
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 9 10 11
 * 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.
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13 14 15 16 17
 * 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
18
 * License along with FFmpeg; if not, write to the Free Software
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
 * 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]++;
    }
88 89
    av_log(avctx, AV_LOG_DEBUG,
           "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
90 91 92 93
           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] +
94
           channel_counts[ACT_BACK_TOP]  + channel_counts[ACT_TOP]);
95 96 97

    switch (channel_counts[ACT_FRONT]) {
    case 4:
98 99
        ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
                     AV_CH_FRONT_RIGHT_OF_CENTER;
100 101 102 103 104 105 106 107 108 109 110
        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:
111 112 113
        av_log(avctx, AV_LOG_WARNING,
               "unsupported number of front channels: %d\n",
               channel_counts[ACT_FRONT]);
114 115 116 117 118 119 120
        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 {
121 122
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of side channels: %d\n",
123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
                   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:
139 140 141
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of back channels: %d\n",
                   channel_counts[ACT_BACK]);
142 143 144 145 146 147 148 149
            ch_error = 1;
            break;
        }
    }
    if (channel_counts[ACT_LFE] > 0) {
        if (channel_counts[ACT_LFE] == 1) {
            ch_layout |= AV_CH_LOW_FREQUENCY;
        } else {
150 151
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of LFE channels: %d\n",
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
                   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) {
193 194
        if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
                                        &avctx->extradata_size)) != AAC_DEC_OK) {
195 196 197 198 199 200
            av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
            return AVERROR_INVALIDDATA;
        }
    }

    if (s->conceal_method != CONCEAL_METHOD_DEFAULT) {
201 202
        if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
                                       s->conceal_method)) != AAC_DEC_OK) {
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
            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;
232
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249
            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) {
250 251
        av_log(avctx, AV_LOG_ERROR,
               "aacDecoder_DecodeFrame() failed: %x\n", err);
252 253 254 255 256 257 258 259 260 261 262 263 264
        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;
265
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
            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;

288 289
    if ((err = aacDecoder_SetParam(s->handle,
                                   AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
        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,
};