| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include "adts_header.h" | ||
| 20 | #include "avcodec.h" | ||
| 21 | #include "codec_internal.h" | ||
| 22 | #include "get_bits.h" | ||
| 23 | #include "decode.h" | ||
| 24 | |||
| 25 | typedef struct FTRContext { | ||
| 26 | AVCodecContext *aac_avctx[64]; // wrapper context for AAC | ||
| 27 | int nb_context; | ||
| 28 | AVPacket *packet; | ||
| 29 | AVFrame *frame; | ||
| 30 | } FTRContext; | ||
| 31 | |||
| 32 | ✗ | static av_cold int ftr_init(AVCodecContext *avctx) | |
| 33 | { | ||
| 34 | ✗ | FTRContext *s = avctx->priv_data; | |
| 35 | const AVCodec *codec; | ||
| 36 | int ret; | ||
| 37 | |||
| 38 | ✗ | if (avctx->ch_layout.nb_channels > 64 || | |
| 39 | ✗ | avctx->ch_layout.nb_channels <= 0) | |
| 40 | ✗ | return AVERROR(EINVAL); | |
| 41 | |||
| 42 | ✗ | s->packet = av_packet_alloc(); | |
| 43 | ✗ | if (!s->packet) | |
| 44 | ✗ | return AVERROR(ENOMEM); | |
| 45 | |||
| 46 | ✗ | s->frame = av_frame_alloc(); | |
| 47 | ✗ | if (!s->frame) | |
| 48 | ✗ | return AVERROR(ENOMEM); | |
| 49 | |||
| 50 | ✗ | s->nb_context = avctx->ch_layout.nb_channels; | |
| 51 | |||
| 52 | ✗ | codec = avcodec_find_decoder(AV_CODEC_ID_AAC); | |
| 53 | ✗ | if (!codec) | |
| 54 | ✗ | return AVERROR_DECODER_NOT_FOUND; | |
| 55 | |||
| 56 | ✗ | for (int i = 0; i < s->nb_context; i++) { | |
| 57 | ✗ | s->aac_avctx[i] = avcodec_alloc_context3(codec); | |
| 58 | ✗ | if (!s->aac_avctx[i]) | |
| 59 | ✗ | return AVERROR(ENOMEM); | |
| 60 | ✗ | ret = avcodec_open2(s->aac_avctx[i], codec, NULL); | |
| 61 | ✗ | if (ret < 0) | |
| 62 | ✗ | return ret; | |
| 63 | } | ||
| 64 | |||
| 65 | ✗ | avctx->sample_fmt = s->aac_avctx[0]->sample_fmt; | |
| 66 | ✗ | if (!av_sample_fmt_is_planar(avctx->sample_fmt)) | |
| 67 | ✗ | return AVERROR(EINVAL); | |
| 68 | |||
| 69 | ✗ | return 0; | |
| 70 | } | ||
| 71 | |||
| 72 | ✗ | static int ftr_decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 73 | int *got_frame, AVPacket *avpkt) | ||
| 74 | { | ||
| 75 | ✗ | FTRContext *s = avctx->priv_data; | |
| 76 | GetBitContext gb; | ||
| 77 | ✗ | int ret, ch_offset = 0; | |
| 78 | |||
| 79 | ✗ | ret = init_get_bits8(&gb, avpkt->data, avpkt->size); | |
| 80 | ✗ | if (ret < 0) | |
| 81 | ✗ | return ret; | |
| 82 | |||
| 83 | ✗ | frame->nb_samples = 0; | |
| 84 | |||
| 85 | ✗ | for (int i = 0; i < s->nb_context; i++) { | |
| 86 | ✗ | AVCodecContext *codec_avctx = s->aac_avctx[i]; | |
| 87 | ✗ | GetBitContext gb2 = gb; | |
| 88 | AACADTSHeaderInfo hdr_info; | ||
| 89 | int size; | ||
| 90 | |||
| 91 | ✗ | if (get_bits_left(&gb) < 64) | |
| 92 | ✗ | return AVERROR_INVALIDDATA; | |
| 93 | |||
| 94 | ✗ | memset(&hdr_info, 0, sizeof(hdr_info)); | |
| 95 | |||
| 96 | ✗ | size = ff_adts_header_parse(&gb2, &hdr_info); | |
| 97 | ✗ | if (size <= 0 || size * 8 > get_bits_left(&gb)) | |
| 98 | ✗ | return AVERROR_INVALIDDATA; | |
| 99 | |||
| 100 | ✗ | if (size > s->packet->size) { | |
| 101 | ✗ | ret = av_grow_packet(s->packet, size - s->packet->size); | |
| 102 | ✗ | if (ret < 0) | |
| 103 | ✗ | return ret; | |
| 104 | } | ||
| 105 | |||
| 106 | ✗ | ret = av_packet_make_writable(s->packet); | |
| 107 | ✗ | if (ret < 0) | |
| 108 | ✗ | return ret; | |
| 109 | |||
| 110 | ✗ | memcpy(s->packet->data, avpkt->data + (get_bits_count(&gb) >> 3), size); | |
| 111 | ✗ | s->packet->size = size; | |
| 112 | |||
| 113 | ✗ | if (size > 12) { | |
| 114 | ✗ | uint8_t *buf = s->packet->data; | |
| 115 | |||
| 116 | ✗ | if (buf[3] & 0x20) { | |
| 117 | ✗ | int tmp = buf[8]; | |
| 118 | ✗ | buf[ 9] = ~buf[9]; | |
| 119 | ✗ | buf[11] = ~buf[11]; | |
| 120 | ✗ | buf[12] = ~buf[12]; | |
| 121 | ✗ | buf[ 8] = ~buf[10]; | |
| 122 | ✗ | buf[10] = ~tmp; | |
| 123 | } | ||
| 124 | } | ||
| 125 | |||
| 126 | ✗ | ret = avcodec_send_packet(codec_avctx, s->packet); | |
| 127 | ✗ | if (ret < 0) { | |
| 128 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n"); | |
| 129 | ✗ | return ret; | |
| 130 | } | ||
| 131 | |||
| 132 | ✗ | ret = avcodec_receive_frame(codec_avctx, s->frame); | |
| 133 | ✗ | if (ret < 0) | |
| 134 | ✗ | return ret; | |
| 135 | |||
| 136 | ✗ | if (!avctx->sample_rate) { | |
| 137 | ✗ | avctx->sample_rate = codec_avctx->sample_rate; | |
| 138 | } else { | ||
| 139 | ✗ | if (avctx->sample_rate != codec_avctx->sample_rate) | |
| 140 | ✗ | return AVERROR_INVALIDDATA; | |
| 141 | } | ||
| 142 | |||
| 143 | ✗ | if (!frame->nb_samples) { | |
| 144 | ✗ | frame->nb_samples = s->frame->nb_samples; | |
| 145 | ✗ | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
| 146 | ✗ | return ret; | |
| 147 | } else { | ||
| 148 | ✗ | if (frame->nb_samples != s->frame->nb_samples) | |
| 149 | ✗ | return AVERROR_INVALIDDATA; | |
| 150 | } | ||
| 151 | |||
| 152 | ✗ | skip_bits_long(&gb, size * 8); | |
| 153 | |||
| 154 | ✗ | if (ch_offset + s->frame->ch_layout.nb_channels > avctx->ch_layout.nb_channels) | |
| 155 | ✗ | return AVERROR_INVALIDDATA; | |
| 156 | |||
| 157 | ✗ | if (avctx->sample_fmt != codec_avctx->sample_fmt) | |
| 158 | ✗ | return AVERROR_INVALIDDATA; | |
| 159 | |||
| 160 | ✗ | for (int ch = 0; ch < s->frame->ch_layout.nb_channels; ch++) | |
| 161 | ✗ | memcpy(frame->extended_data[ch_offset + ch], | |
| 162 | ✗ | s->frame->extended_data[ch], | |
| 163 | ✗ | av_get_bytes_per_sample(codec_avctx->sample_fmt) * s->frame->nb_samples); | |
| 164 | |||
| 165 | ✗ | ch_offset += s->frame->ch_layout.nb_channels; | |
| 166 | |||
| 167 | ✗ | if (ch_offset >= avctx->ch_layout.nb_channels) | |
| 168 | ✗ | break; | |
| 169 | } | ||
| 170 | |||
| 171 | ✗ | *got_frame = 1; | |
| 172 | |||
| 173 | ✗ | return get_bits_count(&gb) >> 3; | |
| 174 | } | ||
| 175 | |||
| 176 | ✗ | static void ftr_flush(AVCodecContext *avctx) | |
| 177 | { | ||
| 178 | ✗ | FTRContext *s = avctx->priv_data; | |
| 179 | |||
| 180 | ✗ | for (int i = 0; i < s->nb_context; i++) | |
| 181 | ✗ | avcodec_flush_buffers(s->aac_avctx[i]); | |
| 182 | ✗ | } | |
| 183 | |||
| 184 | ✗ | static av_cold int ftr_close(AVCodecContext *avctx) | |
| 185 | { | ||
| 186 | ✗ | FTRContext *s = avctx->priv_data; | |
| 187 | |||
| 188 | ✗ | for (int i = 0; i < s->nb_context; i++) | |
| 189 | ✗ | avcodec_free_context(&s->aac_avctx[i]); | |
| 190 | ✗ | av_packet_free(&s->packet); | |
| 191 | ✗ | av_frame_free(&s->frame); | |
| 192 | |||
| 193 | ✗ | return 0; | |
| 194 | } | ||
| 195 | |||
| 196 | const FFCodec ff_ftr_decoder = { | ||
| 197 | .p.name = "ftr", | ||
| 198 | .p.long_name = NULL_IF_CONFIG_SMALL("FTR Voice"), | ||
| 199 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 200 | .p.id = AV_CODEC_ID_FTR, | ||
| 201 | .init = ftr_init, | ||
| 202 | FF_CODEC_DECODE_CB(ftr_decode_frame), | ||
| 203 | .close = ftr_close, | ||
| 204 | .flush = ftr_flush, | ||
| 205 | .priv_data_size = sizeof(FTRContext), | ||
| 206 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 207 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 208 | }; | ||
| 209 |