| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * ACM demuxer | ||
| 3 | * Copyright (c) 2015 Paul B Mahol | ||
| 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 | #include "libavutil/intreadwrite.h" | ||
| 23 | #include "avformat.h" | ||
| 24 | #include "demux.h" | ||
| 25 | #include "rawdec.h" | ||
| 26 | #include "internal.h" | ||
| 27 | |||
| 28 | 7162 | static int acm_probe(const AVProbeData *p) | |
| 29 | { | ||
| 30 |
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7162 | if (AV_RB32(p->buf) != 0x97280301) |
| 31 | 7162 | return 0; | |
| 32 | |||
| 33 | ✗ | return AVPROBE_SCORE_MAX / 3 * 2; | |
| 34 | } | ||
| 35 | |||
| 36 | ✗ | static int acm_read_header(AVFormatContext *s) | |
| 37 | { | ||
| 38 | AVStream *st; | ||
| 39 | int ret; | ||
| 40 | |||
| 41 | ✗ | st = avformat_new_stream(s, NULL); | |
| 42 | ✗ | if (!st) | |
| 43 | ✗ | return AVERROR(ENOMEM); | |
| 44 | |||
| 45 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 46 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_INTERPLAY_ACM; | |
| 47 | |||
| 48 | ✗ | ret = ff_get_extradata(s, st->codecpar, s->pb, 14); | |
| 49 | ✗ | if (ret < 0) | |
| 50 | ✗ | return ret; | |
| 51 | |||
| 52 | ✗ | st->codecpar->ch_layout.nb_channels = AV_RL16(st->codecpar->extradata + 8); | |
| 53 | ✗ | st->codecpar->sample_rate = AV_RL16(st->codecpar->extradata + 10); | |
| 54 | ✗ | if (st->codecpar->ch_layout.nb_channels <= 0 || st->codecpar->sample_rate <= 0) | |
| 55 | ✗ | return AVERROR_INVALIDDATA; | |
| 56 | ✗ | st->start_time = 0; | |
| 57 | ✗ | st->duration = AV_RL32(st->codecpar->extradata + 4) / st->codecpar->ch_layout.nb_channels; | |
| 58 | ✗ | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
| 59 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 60 | |||
| 61 | ✗ | return 0; | |
| 62 | } | ||
| 63 | |||
| 64 | const FFInputFormat ff_acm_demuxer = { | ||
| 65 | .p.name = "acm", | ||
| 66 | .p.long_name = NULL_IF_CONFIG_SMALL("Interplay ACM"), | ||
| 67 | .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS, | ||
| 68 | .p.extensions = "acm", | ||
| 69 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 70 | .read_probe = acm_probe, | ||
| 71 | .read_header = acm_read_header, | ||
| 72 | .read_packet = ff_raw_read_partial_packet, | ||
| 73 | .raw_codec_id = AV_CODEC_ID_INTERPLAY_ACM, | ||
| 74 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 75 | }; | ||
| 76 |