| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * MLP and TrueHD demuxer | ||
| 3 | * Copyright (c) 2001 Fabrice Bellard | ||
| 4 | * Copyright (c) 2005 Alex Beregszaszi | ||
| 5 | * Copyright (c) 2015 Carl Eugen Hoyos | ||
| 6 | * | ||
| 7 | * This file is part of FFmpeg. | ||
| 8 | * | ||
| 9 | * FFmpeg is free software; you can redistribute it and/or | ||
| 10 | * modify it under the terms of the GNU Lesser General Public | ||
| 11 | * License as published by the Free Software Foundation; either | ||
| 12 | * version 2.1 of the License, or (at your option) any later version. | ||
| 13 | * | ||
| 14 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 17 | * Lesser General Public License for more details. | ||
| 18 | * | ||
| 19 | * You should have received a copy of the GNU Lesser General Public | ||
| 20 | * License along with FFmpeg; if not, write to the Free Software | ||
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include "config_components.h" | ||
| 25 | |||
| 26 | #include "avformat.h" | ||
| 27 | #include "avio_internal.h" | ||
| 28 | #include "demux.h" | ||
| 29 | #include "internal.h" | ||
| 30 | #include "rawdec.h" | ||
| 31 | #include "libavutil/intreadwrite.h" | ||
| 32 | #include "libavcodec/mlp.h" | ||
| 33 | #include "libavcodec/mlp_parse.h" | ||
| 34 | |||
| 35 | 14250 | static int av_always_inline mlp_thd_probe(const AVProbeData *p, uint32_t sync) | |
| 36 | { | ||
| 37 | 14250 | const uint8_t *buf, *last_buf = p->buf, *end = p->buf + p->buf_size; | |
| 38 | 14250 | int valid = 0, size = 0; | |
| 39 | 14250 | int nsubframes = 0; | |
| 40 | |||
| 41 |
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735072346 | for (buf = p->buf; buf + 8 <= end; buf++) { |
| 42 |
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735058096 | if (AV_RB32(buf + 4) == sync) { |
| 43 |
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752 | if (last_buf + size == buf) { |
| 44 | 752 | valid += 1 + nsubframes / 8; | |
| 45 | } | ||
| 46 | 752 | nsubframes = 0; | |
| 47 | 752 | last_buf = buf; | |
| 48 | 752 | size = (AV_RB16(buf) & 0xfff) * 2; | |
| 49 |
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735057344 | } else if (buf - last_buf == size) { |
| 50 | 220254 | nsubframes++; | |
| 51 | 220254 | size += (AV_RB16(buf) & 0xfff) * 2; | |
| 52 | } | ||
| 53 | } | ||
| 54 |
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14250 | if (valid >= 100) |
| 55 | 2 | return AVPROBE_SCORE_MAX; | |
| 56 | 14248 | return 0; | |
| 57 | } | ||
| 58 | |||
| 59 | 9 | static int mlp_read_header(AVFormatContext *s) | |
| 60 | { | ||
| 61 | 9 | int ret = ff_raw_audio_read_header(s); | |
| 62 | |||
| 63 |
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9 | if (ret < 0) |
| 64 | ✗ | return ret; | |
| 65 | |||
| 66 | 9 | ret = ffio_ensure_seekback(s->pb, 10); | |
| 67 |
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9 | if (ret == 0) { |
| 68 | uint8_t buffer[10]; | ||
| 69 | 9 | int read, sample_rate = 0; | |
| 70 | |||
| 71 | 9 | read = avio_read(s->pb, buffer, 10); | |
| 72 |
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9 | if (read == 10) { |
| 73 |
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9 | switch (buffer[7]) { |
| 74 | 4 | case SYNC_TRUEHD: | |
| 75 | 4 | sample_rate = mlp_samplerate(buffer[8] >> 4); | |
| 76 | 4 | break; | |
| 77 | 2 | case SYNC_MLP: | |
| 78 | 2 | sample_rate = mlp_samplerate(buffer[9] >> 4); | |
| 79 | 2 | break; | |
| 80 | } | ||
| 81 | |||
| 82 |
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9 | if (sample_rate) |
| 83 | 6 | avpriv_set_pts_info(s->streams[0], 64, 1, sample_rate); | |
| 84 | } | ||
| 85 | |||
| 86 |
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9 | if (read > 0) |
| 87 | 9 | avio_seek(s->pb, -read, SEEK_CUR); | |
| 88 | } | ||
| 89 | |||
| 90 | 9 | return 0; | |
| 91 | } | ||
| 92 | |||
| 93 | #if CONFIG_MLP_DEMUXER | ||
| 94 | 7125 | static int mlp_probe(const AVProbeData *p) | |
| 95 | { | ||
| 96 | 7125 | return mlp_thd_probe(p, 0xf8726fbb); | |
| 97 | } | ||
| 98 | |||
| 99 | const FFInputFormat ff_mlp_demuxer = { | ||
| 100 | .p.name = "mlp", | ||
| 101 | .p.long_name = NULL_IF_CONFIG_SMALL("raw MLP"), | ||
| 102 | .p.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS, | ||
| 103 | .p.extensions = "mlp", | ||
| 104 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 105 | .read_probe = mlp_probe, | ||
| 106 | .read_header = mlp_read_header, | ||
| 107 | .read_packet = ff_raw_read_partial_packet, | ||
| 108 | .raw_codec_id = AV_CODEC_ID_MLP, | ||
| 109 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 110 | }; | ||
| 111 | #endif | ||
| 112 | |||
| 113 | #if CONFIG_TRUEHD_DEMUXER | ||
| 114 | 7125 | static int thd_probe(const AVProbeData *p) | |
| 115 | { | ||
| 116 | 7125 | return mlp_thd_probe(p, 0xf8726fba); | |
| 117 | } | ||
| 118 | |||
| 119 | const FFInputFormat ff_truehd_demuxer = { | ||
| 120 | .p.name = "truehd", | ||
| 121 | .p.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"), | ||
| 122 | .p.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS, | ||
| 123 | .p.extensions = "thd", | ||
| 124 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 125 | .read_probe = thd_probe, | ||
| 126 | .read_header = mlp_read_header, | ||
| 127 | .read_packet = ff_raw_read_partial_packet, | ||
| 128 | .raw_codec_id = AV_CODEC_ID_TRUEHD, | ||
| 129 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 130 | }; | ||
| 131 | #endif | ||
| 132 |