| 1 | /* |
| 2 | * AAC decoder wrapper |
| 3 | * Copyright (c) 2012 Martin Storsjo |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 18 | */ |
| 19 | |
| 20 | #include <fdk-aac/aacdecoder_lib.h> |
| 21 | |
| 22 | #include "libavutil/channel_layout.h" |
| 23 | #include "libavutil/common.h" |
| 24 | #include "libavutil/opt.h" |
| 25 | #include "avcodec.h" |
| 26 | #include "internal.h" |
| 27 | |
| 28 | enum ConcealMethod { |
| 29 | CONCEAL_METHOD_SPECTRAL_MUTING = 0, |
| 30 | CONCEAL_METHOD_NOISE_SUBSTITUTION = 1, |
| 31 | CONCEAL_METHOD_ENERGY_INTERPOLATION = 2, |
| 32 | CONCEAL_METHOD_NB, |
| 33 | }; |
| 34 | |
| 35 | typedef struct FDKAACDecContext { |
| 36 | const AVClass *class; |
| 37 | HANDLE_AACDECODER handle; |
| 38 | int initialized; |
| 39 | enum ConcealMethod conceal_method; |
| 40 | } FDKAACDecContext; |
| 41 | |
| 42 | #define OFFSET(x) offsetof(FDKAACDecContext, x) |
| 43 | #define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
| 44 | static const AVOption fdk_aac_dec_options[] = { |
| 45 | { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, AD, "conceal" }, |
| 46 | { "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" }, |
| 47 | { "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" }, |
| 48 | { "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" }, |
| 49 | { NULL } |
| 50 | }; |
| 51 | |
| 52 | static const AVClass fdk_aac_dec_class = { |
| 53 | "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT |
| 54 | }; |
| 55 | |
| 56 | static int get_stream_info(AVCodecContext *avctx) |
| 57 | { |
| 58 | FDKAACDecContext *s = avctx->priv_data; |
| 59 | CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle); |
| 60 | int channel_counts[9] = { 0 }; |
| 61 | int i, ch_error = 0; |
| 62 | uint64_t ch_layout = 0; |
| 63 | |
| 64 | if (!info) { |
| 65 | av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n"); |
| 66 | return AVERROR_UNKNOWN; |
| 67 | } |
| 68 | |
| 69 | if (info->sampleRate <= 0) { |
| 70 | av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n"); |
| 71 | return AVERROR_UNKNOWN; |
| 72 | } |
| 73 | avctx->sample_rate = info->sampleRate; |
| 74 | avctx->frame_size = info->frameSize; |
| 75 | |
| 76 | for (i = 0; i < info->numChannels; i++) { |
| 77 | AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i]; |
| 78 | if (ctype <= ACT_NONE || ctype > ACT_TOP) { |
| 79 | av_log(avctx, AV_LOG_WARNING, "unknown channel type\n"); |
| 80 | break; |
| 81 | } |
| 82 | channel_counts[ctype]++; |
| 83 | } |
| 84 | av_log(avctx, AV_LOG_DEBUG, |
| 85 | "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n", |
| 86 | info->numChannels, |
| 87 | channel_counts[ACT_FRONT], channel_counts[ACT_SIDE], |
| 88 | channel_counts[ACT_BACK], channel_counts[ACT_LFE], |
| 89 | channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] + |
| 90 | channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]); |
| 91 | |
| 92 | switch (channel_counts[ACT_FRONT]) { |
| 93 | case 4: |
| 94 | ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER | |
| 95 | AV_CH_FRONT_RIGHT_OF_CENTER; |
| 96 | break; |
| 97 | case 3: |
| 98 | ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER; |
| 99 | break; |
| 100 | case 2: |
| 101 | ch_layout |= AV_CH_LAYOUT_STEREO; |
| 102 | break; |
| 103 | case 1: |
| 104 | ch_layout |= AV_CH_FRONT_CENTER; |
| 105 | break; |
| 106 | default: |
| 107 | av_log(avctx, AV_LOG_WARNING, |
| 108 | "unsupported number of front channels: %d\n", |
| 109 | channel_counts[ACT_FRONT]); |
| 110 | ch_error = 1; |
| 111 | break; |
| 112 | } |
| 113 | if (channel_counts[ACT_SIDE] > 0) { |
| 114 | if (channel_counts[ACT_SIDE] == 2) { |
| 115 | ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT; |
| 116 | } else { |
| 117 | av_log(avctx, AV_LOG_WARNING, |
| 118 | "unsupported number of side channels: %d\n", |
| 119 | channel_counts[ACT_SIDE]); |
| 120 | ch_error = 1; |
| 121 | } |
| 122 | } |
| 123 | if (channel_counts[ACT_BACK] > 0) { |
| 124 | switch (channel_counts[ACT_BACK]) { |
| 125 | case 3: |
| 126 | ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER; |
| 127 | break; |
| 128 | case 2: |
| 129 | ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT; |
| 130 | break; |
| 131 | case 1: |
| 132 | ch_layout |= AV_CH_BACK_CENTER; |
| 133 | break; |
| 134 | default: |
| 135 | av_log(avctx, AV_LOG_WARNING, |
| 136 | "unsupported number of back channels: %d\n", |
| 137 | channel_counts[ACT_BACK]); |
| 138 | ch_error = 1; |
| 139 | break; |
| 140 | } |
| 141 | } |
| 142 | if (channel_counts[ACT_LFE] > 0) { |
| 143 | if (channel_counts[ACT_LFE] == 1) { |
| 144 | ch_layout |= AV_CH_LOW_FREQUENCY; |
| 145 | } else { |
| 146 | av_log(avctx, AV_LOG_WARNING, |
| 147 | "unsupported number of LFE channels: %d\n", |
| 148 | channel_counts[ACT_LFE]); |
| 149 | ch_error = 1; |
| 150 | } |
| 151 | } |
| 152 | if (!ch_error && |
| 153 | av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) { |
| 154 | av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n"); |
| 155 | ch_error = 1; |
| 156 | } |
| 157 | if (ch_error) |
| 158 | avctx->channel_layout = 0; |
| 159 | else |
| 160 | avctx->channel_layout = ch_layout; |
| 161 | |
| 162 | avctx->channels = info->numChannels; |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static av_cold int fdk_aac_decode_close(AVCodecContext *avctx) |
| 168 | { |
| 169 | FDKAACDecContext *s = avctx->priv_data; |
| 170 | |
| 171 | if (s->handle) |
| 172 | aacDecoder_Close(s->handle); |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static av_cold int fdk_aac_decode_init(AVCodecContext *avctx) |
| 178 | { |
| 179 | FDKAACDecContext *s = avctx->priv_data; |
| 180 | AAC_DECODER_ERROR err; |
| 181 | |
| 182 | s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1); |
| 183 | if (!s->handle) { |
| 184 | av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n"); |
| 185 | return AVERROR_UNKNOWN; |
| 186 | } |
| 187 | |
| 188 | if (avctx->extradata_size) { |
| 189 | if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata, |
| 190 | &avctx->extradata_size)) != AAC_DEC_OK) { |
| 191 | av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n"); |
| 192 | return AVERROR_INVALIDDATA; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD, |
| 197 | s->conceal_method)) != AAC_DEC_OK) { |
| 198 | av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n"); |
| 199 | return AVERROR_UNKNOWN; |
| 200 | } |
| 201 | |
| 202 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data, |
| 208 | int *got_frame_ptr, AVPacket *avpkt) |
| 209 | { |
| 210 | FDKAACDecContext *s = avctx->priv_data; |
| 211 | AVFrame *frame = data; |
| 212 | int ret; |
| 213 | AAC_DECODER_ERROR err; |
| 214 | UINT valid = avpkt->size; |
| 215 | uint8_t *buf, *tmpptr = NULL; |
| 216 | int buf_size; |
| 217 | |
| 218 | err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid); |
| 219 | if (err != AAC_DEC_OK) { |
| 220 | av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err); |
| 221 | return AVERROR_INVALIDDATA; |
| 222 | } |
| 223 | |
| 224 | if (s->initialized) { |
| 225 | frame->nb_samples = avctx->frame_size; |
| 226 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 227 | return ret; |
| 228 | buf = frame->extended_data[0]; |
| 229 | buf_size = avctx->channels * frame->nb_samples * |
| 230 | av_get_bytes_per_sample(avctx->sample_fmt); |
| 231 | } else { |
| 232 | buf_size = 50 * 1024; |
| 233 | buf = tmpptr = av_malloc(buf_size); |
| 234 | if (!buf) |
| 235 | return AVERROR(ENOMEM); |
| 236 | } |
| 237 | |
| 238 | err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0); |
| 239 | if (err == AAC_DEC_NOT_ENOUGH_BITS) { |
| 240 | ret = avpkt->size - valid; |
| 241 | goto end; |
| 242 | } |
| 243 | if (err != AAC_DEC_OK) { |
| 244 | av_log(avctx, AV_LOG_ERROR, |
| 245 | "aacDecoder_DecodeFrame() failed: %x\n", err); |
| 246 | ret = AVERROR_UNKNOWN; |
| 247 | goto end; |
| 248 | } |
| 249 | |
| 250 | if (!s->initialized) { |
| 251 | if ((ret = get_stream_info(avctx)) < 0) |
| 252 | goto end; |
| 253 | s->initialized = 1; |
| 254 | frame->nb_samples = avctx->frame_size; |
| 255 | } |
| 256 | |
| 257 | if (tmpptr) { |
| 258 | frame->nb_samples = avctx->frame_size; |
| 259 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 260 | goto end; |
| 261 | memcpy(frame->extended_data[0], tmpptr, |
| 262 | avctx->channels * avctx->frame_size * |
| 263 | av_get_bytes_per_sample(avctx->sample_fmt)); |
| 264 | } |
| 265 | |
| 266 | *got_frame_ptr = 1; |
| 267 | ret = avpkt->size - valid; |
| 268 | |
| 269 | end: |
| 270 | av_free(tmpptr); |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx) |
| 275 | { |
| 276 | FDKAACDecContext *s = avctx->priv_data; |
| 277 | AAC_DECODER_ERROR err; |
| 278 | |
| 279 | if (!s->handle) |
| 280 | return; |
| 281 | |
| 282 | if ((err = aacDecoder_SetParam(s->handle, |
| 283 | AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK) |
| 284 | av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n"); |
| 285 | } |
| 286 | |
| 287 | AVCodec ff_libfdk_aac_decoder = { |
| 288 | .name = "libfdk_aac", |
| 289 | .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"), |
| 290 | .type = AVMEDIA_TYPE_AUDIO, |
| 291 | .id = AV_CODEC_ID_AAC, |
| 292 | .priv_data_size = sizeof(FDKAACDecContext), |
| 293 | .init = fdk_aac_decode_init, |
| 294 | .decode = fdk_aac_decode_frame, |
| 295 | .close = fdk_aac_decode_close, |
| 296 | .flush = fdk_aac_decode_flush, |
| 297 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_CHANNEL_CONF, |
| 298 | .priv_class = &fdk_aac_dec_class, |
| 299 | }; |