| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * QOA demuxer | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "avformat.h" | ||
| 22 | #include "avio_internal.h" | ||
| 23 | #include "demux.h" | ||
| 24 | #include "internal.h" | ||
| 25 | #include "libavutil/intreadwrite.h" | ||
| 26 | |||
| 27 | 7186 | static int qoa_probe(const AVProbeData *p) | |
| 28 | { | ||
| 29 |
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7186 | if ((p->buf_size < 16) || |
| 30 |
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7186 | (AV_RB32(p->buf) != MKBETAG('q','o','a','f')) || |
| 31 |
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3 | (AV_RB32(p->buf + 4) == 0) || |
| 32 |
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3 | (p->buf[8] == 0) || |
| 33 |
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3 | (AV_RB24(p->buf + 9) == 0) || |
| 34 |
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3 | (AV_RB16(p->buf + 12) == 0) || |
| 35 |
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3 | (AV_RB16(p->buf + 14) == 0)) |
| 36 | 7183 | return 0; | |
| 37 | 3 | return AVPROBE_SCORE_MAX; | |
| 38 | } | ||
| 39 | |||
| 40 | 3 | static int qoa_read_header(AVFormatContext *s) | |
| 41 | { | ||
| 42 | 3 | AVIOContext *pb = s->pb; | |
| 43 | AVStream *st; | ||
| 44 | int ret; | ||
| 45 | |||
| 46 | 3 | st = avformat_new_stream(s, NULL); | |
| 47 |
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3 | if (!st) |
| 48 | ✗ | return AVERROR(ENOMEM); | |
| 49 | |||
| 50 | 3 | avio_skip(pb, 4); | |
| 51 | 3 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 52 | 3 | st->codecpar->codec_id = AV_CODEC_ID_QOA; | |
| 53 | 3 | st->duration = avio_rb32(pb); | |
| 54 | 3 | st->start_time = 0; | |
| 55 | |||
| 56 | 3 | ret = ffio_ensure_seekback(pb, 4); | |
| 57 |
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3 | if (ret < 0) |
| 58 | ✗ | return ret; | |
| 59 | 3 | st->codecpar->ch_layout.nb_channels = avio_r8(pb); | |
| 60 |
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3 | if (st->codecpar->ch_layout.nb_channels == 0) |
| 61 | ✗ | return AVERROR_INVALIDDATA; | |
| 62 | |||
| 63 | 3 | st->codecpar->sample_rate = avio_rb24(pb); | |
| 64 |
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3 | if (st->codecpar->sample_rate == 0) |
| 65 | ✗ | return AVERROR_INVALIDDATA; | |
| 66 | |||
| 67 | 3 | avio_seek(pb, -4, SEEK_CUR); | |
| 68 | |||
| 69 | 3 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 70 | |||
| 71 | 3 | return 0; | |
| 72 | } | ||
| 73 | |||
| 74 | 173 | static int qoa_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 75 | { | ||
| 76 | 173 | AVIOContext *pb = s->pb; | |
| 77 | uint16_t size, duration; | ||
| 78 | uint8_t hdr[8]; | ||
| 79 | int64_t pos; | ||
| 80 | int ret; | ||
| 81 | |||
| 82 |
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173 | if (avio_feof(pb)) |
| 83 | 2 | return AVERROR_EOF; | |
| 84 | |||
| 85 | 171 | pos = avio_tell(pb); | |
| 86 | 171 | ret = avio_read(pb, hdr, sizeof(hdr)); | |
| 87 |
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171 | if (ret != sizeof(hdr)) |
| 88 | 3 | return AVERROR_EOF; | |
| 89 | |||
| 90 | 168 | duration = AV_RB16(hdr + 4); | |
| 91 | 168 | size = AV_RB16(hdr + 6); | |
| 92 |
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168 | if ((ret = av_new_packet(pkt, size)) < 0) |
| 93 | ✗ | return ret; | |
| 94 | |||
| 95 | 168 | memcpy(pkt->data, hdr, sizeof(hdr)); | |
| 96 | 168 | ret = avio_read(pb, pkt->data + sizeof(hdr), size - sizeof(hdr)); | |
| 97 |
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168 | if (ret != size - sizeof(hdr)) |
| 98 | ✗ | return AVERROR(EIO); | |
| 99 | 168 | pkt->stream_index = 0; | |
| 100 | 168 | pkt->pos = pos; | |
| 101 | 168 | pkt->duration = duration; | |
| 102 | |||
| 103 | 168 | return 0; | |
| 104 | } | ||
| 105 | |||
| 106 | const FFInputFormat ff_qoa_demuxer = { | ||
| 107 | .p.name = "qoa", | ||
| 108 | .p.long_name = NULL_IF_CONFIG_SMALL("QOA"), | ||
| 109 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 110 | .p.extensions = "qoa", | ||
| 111 | .read_probe = qoa_probe, | ||
| 112 | .read_header = qoa_read_header, | ||
| 113 | .read_packet = qoa_read_packet, | ||
| 114 | }; | ||
| 115 |