| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * amr file format | ||
| 3 | * Copyright (c) 2001 FFmpeg project | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * 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 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /* | ||
| 23 | Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267 | ||
| 24 | */ | ||
| 25 | |||
| 26 | #include "config_components.h" | ||
| 27 | |||
| 28 | #include "libavutil/channel_layout.h" | ||
| 29 | #include "libavutil/intreadwrite.h" | ||
| 30 | #include "avformat.h" | ||
| 31 | #include "avio_internal.h" | ||
| 32 | #include "demux.h" | ||
| 33 | #include "internal.h" | ||
| 34 | #include "mux.h" | ||
| 35 | #include "rawdec.h" | ||
| 36 | #include "rawenc.h" | ||
| 37 | |||
| 38 | typedef struct AMRContext { | ||
| 39 | FFRawDemuxerContext rawctx; | ||
| 40 | } AMRContext; | ||
| 41 | |||
| 42 | static const uint8_t AMR_header[6] = "#!AMR\x0a"; | ||
| 43 | static const uint8_t AMRMC_header[12] = "#!AMR_MC1.0\x0a"; | ||
| 44 | static const uint8_t AMRWB_header[9] = "#!AMR-WB\x0a"; | ||
| 45 | static const uint8_t AMRWBMC_header[15] = "#!AMR-WB_MC1.0\x0a"; | ||
| 46 | |||
| 47 | static const uint8_t amrnb_packed_size[16] = { | ||
| 48 | 13, 14, 16, 18, 20, 21, 27, 32, 6, 1, 1, 1, 1, 1, 1, 1 | ||
| 49 | }; | ||
| 50 | static const uint8_t amrwb_packed_size[16] = { | ||
| 51 | 18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 1, 1, 1, 1, 1, 1 | ||
| 52 | }; | ||
| 53 | |||
| 54 | #if CONFIG_AMR_DEMUXER | ||
| 55 | 7186 | static int amr_probe(const AVProbeData *p) | |
| 56 | { | ||
| 57 | // Only check for "#!AMR" which could be amr-wb, amr-nb. | ||
| 58 | // This will also trigger multichannel files: "#!AMR_MC1.0\n" and | ||
| 59 | // "#!AMR-WB_MC1.0\n" | ||
| 60 | |||
| 61 |
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7186 | if (!memcmp(p->buf, AMR_header, 5)) |
| 62 | 10 | return AVPROBE_SCORE_MAX; | |
| 63 | else | ||
| 64 | 7176 | return 0; | |
| 65 | } | ||
| 66 | |||
| 67 | /* amr input */ | ||
| 68 | 12 | static int amr_read_header(AVFormatContext *s) | |
| 69 | { | ||
| 70 | 12 | AVIOContext *pb = s->pb; | |
| 71 | AVStream *st; | ||
| 72 | 12 | uint8_t header[19] = { 0 }; | |
| 73 | 12 | int read, back = 0, ret; | |
| 74 | |||
| 75 | 12 | ret = ffio_ensure_seekback(s->pb, sizeof(header)); | |
| 76 |
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12 | if (ret < 0) |
| 77 | ✗ | return ret; | |
| 78 | |||
| 79 | 12 | read = avio_read(pb, header, sizeof(header)); | |
| 80 |
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12 | if (read < 0) |
| 81 | ✗ | return read; | |
| 82 | |||
| 83 | 12 | st = avformat_new_stream(s, NULL); | |
| 84 |
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12 | if (!st) |
| 85 | ✗ | return AVERROR(ENOMEM); | |
| 86 |
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12 | if (!memcmp(header, AMR_header, sizeof(AMR_header))) { |
| 87 | 11 | st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r'); | |
| 88 | 11 | st->codecpar->codec_id = AV_CODEC_ID_AMR_NB; | |
| 89 | 11 | st->codecpar->sample_rate = 8000; | |
| 90 | 11 | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 91 | 11 | back = read - sizeof(AMR_header); | |
| 92 |
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1 | } else if (!memcmp(header, AMRWB_header, sizeof(AMRWB_header))) { |
| 93 | 1 | st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b'); | |
| 94 | 1 | st->codecpar->codec_id = AV_CODEC_ID_AMR_WB; | |
| 95 | 1 | st->codecpar->sample_rate = 16000; | |
| 96 | 1 | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 97 | 1 | back = read - sizeof(AMRWB_header); | |
| 98 | ✗ | } else if (!memcmp(header, AMRMC_header, sizeof(AMRMC_header))) { | |
| 99 | ✗ | st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r'); | |
| 100 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_AMR_NB; | |
| 101 | ✗ | st->codecpar->sample_rate = 8000; | |
| 102 | ✗ | st->codecpar->ch_layout.nb_channels = AV_RL32(header + 12); | |
| 103 | ✗ | back = read - 4 - sizeof(AMRMC_header); | |
| 104 | ✗ | } else if (!memcmp(header, AMRWBMC_header, sizeof(AMRWBMC_header))) { | |
| 105 | ✗ | st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b'); | |
| 106 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_AMR_WB; | |
| 107 | ✗ | st->codecpar->sample_rate = 16000; | |
| 108 | ✗ | st->codecpar->ch_layout.nb_channels = AV_RL32(header + 15); | |
| 109 | ✗ | back = read - 4 - sizeof(AMRWBMC_header); | |
| 110 | } else { | ||
| 111 | ✗ | return AVERROR_INVALIDDATA; | |
| 112 | } | ||
| 113 | |||
| 114 |
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12 | if (st->codecpar->ch_layout.nb_channels < 1) |
| 115 | ✗ | return AVERROR_INVALIDDATA; | |
| 116 | |||
| 117 | 12 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 118 | 12 | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
| 119 | 12 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 120 | |||
| 121 |
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12 | if (back > 0) |
| 122 | 12 | avio_seek(pb, -back, SEEK_CUR); | |
| 123 | |||
| 124 | 12 | return 0; | |
| 125 | } | ||
| 126 | |||
| 127 | const FFInputFormat ff_amr_demuxer = { | ||
| 128 | .p.name = "amr", | ||
| 129 | .p.long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"), | ||
| 130 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 131 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 132 | .priv_data_size = sizeof(AMRContext), | ||
| 133 | .read_probe = amr_probe, | ||
| 134 | .read_header = amr_read_header, | ||
| 135 | .read_packet = ff_raw_read_partial_packet, | ||
| 136 | }; | ||
| 137 | #endif | ||
| 138 | |||
| 139 | #if CONFIG_AMRNB_DEMUXER | ||
| 140 | 7186 | static int amrnb_probe(const AVProbeData *p) | |
| 141 | { | ||
| 142 | 7186 | int mode, i = 0, valid = 0, invalid = 0; | |
| 143 | 7186 | const uint8_t *b = p->buf; | |
| 144 | |||
| 145 |
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110627800 | while (i < p->buf_size) { |
| 146 | 110620614 | mode = b[i] >> 3 & 0x0F; | |
| 147 |
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126618938 | if (mode < 9 && (b[i] & 0x4) == 0x4) { |
| 148 | 15998324 | int last = b[i]; | |
| 149 | 15998324 | int size = amrnb_packed_size[mode]; | |
| 150 |
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16090662 | while (size--) { |
| 151 |
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16089290 | if (b[++i] != last) |
| 152 | 15996952 | break; | |
| 153 | } | ||
| 154 |
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15998324 | if (size > 0) { |
| 155 | 15996830 | valid++; | |
| 156 | 15996830 | i += size; | |
| 157 | } | ||
| 158 | } else { | ||
| 159 | 94622290 | valid = 0; | |
| 160 | 94622290 | invalid++; | |
| 161 | 94622290 | i++; | |
| 162 | } | ||
| 163 | } | ||
| 164 |
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7186 | if (valid > 100 && valid >> 4 > invalid) |
| 165 | 12 | return AVPROBE_SCORE_EXTENSION / 2 + 1; | |
| 166 | 7174 | return 0; | |
| 167 | } | ||
| 168 | |||
| 169 | ✗ | static int amrnb_read_header(AVFormatContext *s) | |
| 170 | { | ||
| 171 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 172 | ✗ | if (!st) | |
| 173 | ✗ | return AVERROR(ENOMEM); | |
| 174 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_AMR_NB; | |
| 175 | ✗ | st->codecpar->sample_rate = 8000; | |
| 176 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 177 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 178 | ✗ | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
| 179 | ✗ | avpriv_set_pts_info(st, 64, 1, 8000); | |
| 180 | |||
| 181 | ✗ | return 0; | |
| 182 | } | ||
| 183 | |||
| 184 | const FFInputFormat ff_amrnb_demuxer = { | ||
| 185 | .p.name = "amrnb", | ||
| 186 | .p.long_name = NULL_IF_CONFIG_SMALL("raw AMR-NB"), | ||
| 187 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 188 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 189 | .priv_data_size = sizeof(AMRContext), | ||
| 190 | .read_probe = amrnb_probe, | ||
| 191 | .read_header = amrnb_read_header, | ||
| 192 | .read_packet = ff_raw_read_partial_packet, | ||
| 193 | }; | ||
| 194 | #endif | ||
| 195 | |||
| 196 | #if CONFIG_AMRWB_DEMUXER | ||
| 197 | 7186 | static int amrwb_probe(const AVProbeData *p) | |
| 198 | { | ||
| 199 | 7186 | int mode, i = 0, valid = 0, invalid = 0; | |
| 200 | 7186 | const uint8_t *b = p->buf; | |
| 201 | |||
| 202 |
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69245984 | while (i < p->buf_size) { |
| 203 | 69238798 | mode = b[i] >> 3 & 0x0F; | |
| 204 |
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78383766 | if (mode < 10 && (b[i] & 0x4) == 0x4) { |
| 205 | 9144968 | int last = b[i]; | |
| 206 | 9144968 | int size = amrwb_packed_size[mode]; | |
| 207 |
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9204266 | while (size--) { |
| 208 |
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9203794 | if (b[++i] != last) |
| 209 | 9144496 | break; | |
| 210 | } | ||
| 211 |
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9144968 | if (size > 0) { |
| 212 | 9144479 | valid++; | |
| 213 | 9144479 | i += size; | |
| 214 | } | ||
| 215 | } else { | ||
| 216 | 60093830 | valid = 0; | |
| 217 | 60093830 | invalid++; | |
| 218 | 60093830 | i++; | |
| 219 | } | ||
| 220 | } | ||
| 221 |
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7186 | if (valid > 100 && valid >> 4 > invalid) |
| 222 | ✗ | return AVPROBE_SCORE_EXTENSION / 2 + 1; | |
| 223 | 7186 | return 0; | |
| 224 | } | ||
| 225 | |||
| 226 | ✗ | static int amrwb_read_header(AVFormatContext *s) | |
| 227 | { | ||
| 228 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 229 | ✗ | if (!st) | |
| 230 | ✗ | return AVERROR(ENOMEM); | |
| 231 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_AMR_WB; | |
| 232 | ✗ | st->codecpar->sample_rate = 16000; | |
| 233 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 234 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 235 | ✗ | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
| 236 | ✗ | avpriv_set_pts_info(st, 64, 1, 16000); | |
| 237 | |||
| 238 | ✗ | return 0; | |
| 239 | } | ||
| 240 | |||
| 241 | const FFInputFormat ff_amrwb_demuxer = { | ||
| 242 | .p.name = "amrwb", | ||
| 243 | .p.long_name = NULL_IF_CONFIG_SMALL("raw AMR-WB"), | ||
| 244 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 245 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 246 | .priv_data_size = sizeof(AMRContext), | ||
| 247 | .read_probe = amrwb_probe, | ||
| 248 | .read_header = amrwb_read_header, | ||
| 249 | .read_packet = ff_raw_read_partial_packet, | ||
| 250 | }; | ||
| 251 | #endif | ||
| 252 | |||
| 253 | #if CONFIG_AMR_MUXER | ||
| 254 | 2 | static int amr_write_header(AVFormatContext *s) | |
| 255 | { | ||
| 256 | 2 | AVIOContext *pb = s->pb; | |
| 257 | 2 | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 258 | |||
| 259 |
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2 | if (par->codec_id == AV_CODEC_ID_AMR_NB) { |
| 260 | 1 | avio_write(pb, AMR_header, sizeof(AMR_header)); /* magic number */ | |
| 261 |
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1 | } else if (par->codec_id == AV_CODEC_ID_AMR_WB) { |
| 262 | 1 | avio_write(pb, AMRWB_header, sizeof(AMRWB_header)); /* magic number */ | |
| 263 | } else { | ||
| 264 | ✗ | return -1; | |
| 265 | } | ||
| 266 | 2 | return 0; | |
| 267 | } | ||
| 268 | |||
| 269 | const FFOutputFormat ff_amr_muxer = { | ||
| 270 | .p.name = "amr", | ||
| 271 | .p.long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"), | ||
| 272 | .p.mime_type = "audio/amr", | ||
| 273 | .p.extensions = "amr", | ||
| 274 | .p.audio_codec = AV_CODEC_ID_AMR_NB, | ||
| 275 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 276 | .p.subtitle_codec = AV_CODEC_ID_NONE, | ||
| 277 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 278 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | ||
| 279 | .write_header = amr_write_header, | ||
| 280 | .write_packet = ff_raw_write_packet, | ||
| 281 | }; | ||
| 282 | #endif | ||
| 283 |