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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * AAC decoder wrapper |
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| 3 | * Copyright (c) 2012 Martin Storsjo |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include |
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| 23 | |||
| 24 | #include "libavutil/channel_layout.h" |
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| 25 | #include "libavutil/common.h" |
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| 26 | #include "libavutil/opt.h" |
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| 27 | #include "avcodec.h" |
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| 28 | #include "internal.h" |
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| 29 | |||
| 30 | enum ConcealMethod { |
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| 31 | CONCEAL_METHOD_DEFAULT = -1, |
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| 32 | CONCEAL_METHOD_SPECTRAL_MUTING = 0, |
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| 33 | CONCEAL_METHOD_NOISE_SUBSTITUTION = 1, |
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| 34 | CONCEAL_METHOD_ENERGY_INTERPOLATION = 2, |
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| 35 | CONCEAL_METHOD_NB, |
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| 36 | }; |
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| 37 | |||
| 38 | typedef struct FDKAACDecContext { |
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| 39 | const AVClass *class; |
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| 40 | HANDLE_AACDECODER handle; |
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| 41 | int initialized; |
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| 42 | enum ConcealMethod conceal_method; |
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| 43 | } FDKAACDecContext; |
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| 44 | |||
| 45 | #define OFFSET(x) offsetof(FDKAACDecContext, x) |
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| 46 | #define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
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| 47 | static const AVOption fdk_aac_dec_options[] = { |
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| 48 | { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_DEFAULT }, CONCEAL_METHOD_DEFAULT, CONCEAL_METHOD_NB - 1, AD, "conceal" }, |
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| 49 | { "default", "Default", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_DEFAULT }, INT_MIN, INT_MAX, AD, "conceal" }, |
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| 50 | { "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" }, |
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| 51 | { "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" }, |
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| 52 | { "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" }, |
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| 53 | { NULL } |
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| 54 | }; |
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| 55 | |||
| 56 | static const AVClass fdk_aac_dec_class = { |
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| 57 | "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT |
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| 58 | }; |
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| 59 | |||
| 60 | static int get_stream_info(AVCodecContext *avctx) |
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| 61 | { |
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| 62 | FDKAACDecContext *s = avctx->priv_data; |
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| 63 | CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle); |
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| 64 | int channel_counts[9] = { 0 }; |
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| 65 | int i, ch_error = 0; |
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| 66 | uint64_t ch_layout = 0; |
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| 67 | |||
| 68 | if (!info) { |
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| 69 | av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n"); |
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| 70 | return AVERROR_UNKNOWN; |
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| 71 | } |
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| 72 | |||
| 73 | if (info->sampleRate <= 0) { |
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| 74 | av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n"); |
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| 75 | return AVERROR_UNKNOWN; |
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| 76 | } |
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| 77 | avctx->sample_rate = info->sampleRate; |
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| 78 | avctx->frame_size = info->frameSize; |
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| 79 | |||
| 80 | for (i = 0; i < info->numChannels; i++) { |
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| 81 | AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i]; |
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| 82 | if (ctype <= ACT_NONE || ctype > ACT_TOP) { |
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| 83 | av_log(avctx, AV_LOG_WARNING, "unknown channel type\n"); |
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| 84 | break; |
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| 85 | } |
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| 86 | channel_counts[ctype]++; |
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| 87 | } |
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| 88 | av_log(avctx, AV_LOG_DEBUG, |
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| 89 | "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n", |
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| 90 | info->numChannels, |
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| 91 | channel_counts[ACT_FRONT], channel_counts[ACT_SIDE], |
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| 92 | channel_counts[ACT_BACK], channel_counts[ACT_LFE], |
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| 93 | channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] + |
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| 94 | channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]); |
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| 95 | |||
| 96 | switch (channel_counts[ACT_FRONT]) { |
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| 97 | case 4: |
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| 98 | ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER | |
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| 99 | AV_CH_FRONT_RIGHT_OF_CENTER; |
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| 100 | break; |
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| 101 | case 3: |
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| 102 | ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER; |
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| 103 | break; |
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| 104 | case 2: |
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| 105 | ch_layout |= AV_CH_LAYOUT_STEREO; |
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| 106 | break; |
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| 107 | case 1: |
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| 108 | ch_layout |= AV_CH_FRONT_CENTER; |
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| 109 | break; |
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| 110 | default: |
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| 111 | av_log(avctx, AV_LOG_WARNING, |
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| 112 | "unsupported number of front channels: %d\n", |
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| 113 | channel_counts[ACT_FRONT]); |
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| 114 | ch_error = 1; |
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| 115 | break; |
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| 116 | } |
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| 117 | if (channel_counts[ACT_SIDE] > 0) { |
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| 118 | if (channel_counts[ACT_SIDE] == 2) { |
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| 119 | ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT; |
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| 120 | } else { |
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| 121 | av_log(avctx, AV_LOG_WARNING, |
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| 122 | "unsupported number of side channels: %d\n", |
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| 123 | channel_counts[ACT_SIDE]); |
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| 124 | ch_error = 1; |
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| 125 | } |
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| 126 | } |
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| 127 | if (channel_counts[ACT_BACK] > 0) { |
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| 128 | switch (channel_counts[ACT_BACK]) { |
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| 129 | case 3: |
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| 130 | ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER; |
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| 131 | break; |
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| 132 | case 2: |
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| 133 | ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT; |
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| 134 | break; |
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| 135 | case 1: |
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| 136 | ch_layout |= AV_CH_BACK_CENTER; |
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| 137 | break; |
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| 138 | default: |
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| 139 | av_log(avctx, AV_LOG_WARNING, |
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| 140 | "unsupported number of back channels: %d\n", |
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| 141 | channel_counts[ACT_BACK]); |
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| 142 | ch_error = 1; |
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| 143 | break; |
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| 144 | } |
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| 145 | } |
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| 146 | if (channel_counts[ACT_LFE] > 0) { |
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| 147 | if (channel_counts[ACT_LFE] == 1) { |
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| 148 | ch_layout |= AV_CH_LOW_FREQUENCY; |
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| 149 | } else { |
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| 150 | av_log(avctx, AV_LOG_WARNING, |
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| 151 | "unsupported number of LFE channels: %d\n", |
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| 152 | channel_counts[ACT_LFE]); |
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| 153 | ch_error = 1; |
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| 154 | } |
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| 155 | } |
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| 156 | if (!ch_error && |
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| 157 | av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) { |
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| 158 | av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n"); |
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| 159 | ch_error = 1; |
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| 160 | } |
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| 161 | if (ch_error) |
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| 162 | avctx->channel_layout = 0; |
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| 163 | else |
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| 164 | avctx->channel_layout = ch_layout; |
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| 165 | |||
| 166 | avctx->channels = info->numChannels; |
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| 167 | |||
| 168 | return 0; |
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| 169 | } |
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| 170 | |||
| 171 | static av_cold int fdk_aac_decode_close(AVCodecContext *avctx) |
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| 172 | { |
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| 173 | FDKAACDecContext *s = avctx->priv_data; |
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| 174 | |||
| 175 | if (s->handle) |
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| 176 | aacDecoder_Close(s->handle); |
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| 177 | |||
| 178 | return 0; |
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| 179 | } |
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| 180 | |||
| 181 | static av_cold int fdk_aac_decode_init(AVCodecContext *avctx) |
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| 182 | { |
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| 183 | FDKAACDecContext *s = avctx->priv_data; |
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| 184 | AAC_DECODER_ERROR err; |
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| 185 | |||
| 186 | s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1); |
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| 187 | if (!s->handle) { |
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| 188 | av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n"); |
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| 189 | return AVERROR_UNKNOWN; |
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| 190 | } |
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| 191 | |||
| 192 | if (avctx->extradata_size) { |
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| 193 | if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata, |
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| 194 | &avctx->extradata_size)) != AAC_DEC_OK) { |
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| 195 | av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n"); |
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| 196 | return AVERROR_INVALIDDATA; |
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| 197 | } |
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| 198 | } |
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| 199 | |||
| 200 | if (s->conceal_method != CONCEAL_METHOD_DEFAULT) { |
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| 201 | if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD, |
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| 202 | s->conceal_method)) != AAC_DEC_OK) { |
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| 203 | av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n"); |
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| 204 | return AVERROR_UNKNOWN; |
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| 205 | } |
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| 206 | } |
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| 207 | |||
| 208 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
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| 209 | |||
| 210 | return 0; |
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| 211 | } |
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| 212 | |||
| 213 | static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data, |
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| 214 | int *got_frame_ptr, AVPacket *avpkt) |
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| 215 | { |
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| 216 | FDKAACDecContext *s = avctx->priv_data; |
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| 217 | AVFrame *frame = data; |
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| 218 | int ret; |
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| 219 | AAC_DECODER_ERROR err; |
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| 220 | UINT valid = avpkt->size; |
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| 221 | uint8_t *buf, *tmpptr = NULL; |
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| 222 | int buf_size; |
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| 223 | |||
| 224 | err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid); |
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| 225 | if (err != AAC_DEC_OK) { |
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| 226 | av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err); |
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| 227 | return AVERROR_INVALIDDATA; |
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| 228 | } |
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| 229 | |||
| 230 | if (s->initialized) { |
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| 231 | frame->nb_samples = avctx->frame_size; |
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| 232 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { |
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| 233 | av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n"); |
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| 234 | return ret; |
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| 235 | } |
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| 236 | buf = frame->extended_data[0]; |
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| 237 | buf_size = avctx->channels * frame->nb_samples * |
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| 238 | av_get_bytes_per_sample(avctx->sample_fmt); |
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| 239 | } else { |
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| 240 | buf_size = 50 * 1024; |
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| 241 | buf = tmpptr = av_malloc(buf_size); |
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| 242 | if (!buf) |
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| 243 | return AVERROR(ENOMEM); |
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| 244 | } |
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| 245 | |||
| 246 | err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0); |
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| 247 | if (err == AAC_DEC_NOT_ENOUGH_BITS) { |
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| 248 | ret = avpkt->size - valid; |
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| 249 | goto end; |
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| 250 | } |
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| 251 | if (err != AAC_DEC_OK) { |
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| 252 | av_log(avctx, AV_LOG_ERROR, |
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| 253 | "aacDecoder_DecodeFrame() failed: %x\n", err); |
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| 254 | ret = AVERROR_UNKNOWN; |
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| 255 | goto end; |
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| 256 | } |
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| 257 | |||
| 258 | if (!s->initialized) { |
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| 259 | if ((ret = get_stream_info(avctx)) < 0) |
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| 260 | goto end; |
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| 261 | s->initialized = 1; |
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| 262 | frame->nb_samples = avctx->frame_size; |
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| 263 | } |
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| 264 | |||
| 265 | if (tmpptr) { |
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| 266 | frame->nb_samples = avctx->frame_size; |
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| 267 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { |
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| 268 | av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n"); |
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| 269 | goto end; |
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| 270 | } |
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| 271 | memcpy(frame->extended_data[0], tmpptr, |
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| 272 | avctx->channels * avctx->frame_size * |
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| 273 | av_get_bytes_per_sample(avctx->sample_fmt)); |
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| 274 | } |
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| 275 | |||
| 276 | *got_frame_ptr = 1; |
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| 277 | ret = avpkt->size - valid; |
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| 278 | |||
| 279 | end: |
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| 280 | av_free(tmpptr); |
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| 281 | return ret; |
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| 282 | } |
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| 283 | |||
| 284 | static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx) |
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| 285 | { |
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| 286 | FDKAACDecContext *s = avctx->priv_data; |
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| 287 | AAC_DECODER_ERROR err; |
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| 288 | |||
| 289 | if (!s->handle) |
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| 290 | return; |
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| 291 | |||
| 292 | if ((err = aacDecoder_SetParam(s->handle, |
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| 293 | AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK) |
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| 294 | av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n"); |
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| 295 | } |
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| 296 | |||
| 297 | AVCodec ff_libfdk_aac_decoder = { |
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| 298 | .name = "libfdk_aac", |
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| 299 | .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"), |
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| 300 | .type = AVMEDIA_TYPE_AUDIO, |
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| 301 | .id = AV_CODEC_ID_AAC, |
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| 302 | .priv_data_size = sizeof(FDKAACDecContext), |
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| 303 | .init = fdk_aac_decode_init, |
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| 304 | .decode = fdk_aac_decode_frame, |
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| 305 | .close = fdk_aac_decode_close, |
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| 306 | .flush = fdk_aac_decode_flush, |
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| 307 | .capabilities = CODEC_CAP_DR1, |
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| 308 | .priv_class = &fdk_aac_dec_class, |
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| 309 | }; |