| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Creative Voice File muxer. | ||
| 3 | * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> | ||
| 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 "voc.h" | ||
| 23 | #include "internal.h" | ||
| 24 | #include "mux.h" | ||
| 25 | |||
| 26 | |||
| 27 | typedef struct voc_enc_context { | ||
| 28 | int param_written; | ||
| 29 | } VocEncContext; | ||
| 30 | |||
| 31 | 2 | static int voc_write_header(AVFormatContext *s) | |
| 32 | { | ||
| 33 | 2 | AVIOContext *pb = s->pb; | |
| 34 | 2 | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 35 | 2 | const int header_size = 26; | |
| 36 | 2 | const int version = 0x0114; | |
| 37 | |||
| 38 |
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2 | if (s->nb_streams != 1 |
| 39 |
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2 | || s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) |
| 40 | ✗ | return AVERROR_PATCHWELCOME; | |
| 41 | |||
| 42 |
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2 | if (!par->codec_tag && par->codec_id != AV_CODEC_ID_PCM_U8) { |
| 43 | ✗ | av_log(s, AV_LOG_ERROR, "unsupported codec\n"); | |
| 44 | ✗ | return AVERROR(EINVAL); | |
| 45 | } | ||
| 46 | |||
| 47 | 2 | avio_write(pb, ff_voc_magic, sizeof(ff_voc_magic) - 1); | |
| 48 | 2 | avio_wl16(pb, header_size); | |
| 49 | 2 | avio_wl16(pb, version); | |
| 50 | 2 | avio_wl16(pb, ~version + 0x1234); | |
| 51 | |||
| 52 | 2 | return 0; | |
| 53 | } | ||
| 54 | |||
| 55 | 22 | static int voc_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| 56 | { | ||
| 57 | 22 | VocEncContext *voc = s->priv_data; | |
| 58 | 22 | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 59 | 22 | AVIOContext *pb = s->pb; | |
| 60 | |||
| 61 |
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22 | if (!voc->param_written) { |
| 62 |
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2 | if (par->codec_tag > 3) { |
| 63 | 1 | avio_w8(pb, VOC_TYPE_NEW_VOICE_DATA); | |
| 64 | 1 | avio_wl24(pb, pkt->size + 12); | |
| 65 | 1 | avio_wl32(pb, par->sample_rate); | |
| 66 | 1 | avio_w8(pb, par->bits_per_coded_sample); | |
| 67 | 1 | avio_w8(pb, par->ch_layout.nb_channels); | |
| 68 | 1 | avio_wl16(pb, par->codec_tag); | |
| 69 | 1 | avio_wl32(pb, 0); | |
| 70 | } else { | ||
| 71 |
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1 | if (s->streams[0]->codecpar->ch_layout.nb_channels > 1) { |
| 72 | ✗ | avio_w8(pb, VOC_TYPE_EXTENDED); | |
| 73 | ✗ | avio_wl24(pb, 4); | |
| 74 | ✗ | avio_wl16(pb, 65536 - (256000000 + par->sample_rate * par->ch_layout.nb_channels / 2) / | |
| 75 | ✗ | (par->sample_rate * par->ch_layout.nb_channels)); | |
| 76 | ✗ | avio_w8(pb, par->codec_tag); | |
| 77 | ✗ | avio_w8(pb, par->ch_layout.nb_channels - 1); | |
| 78 | } | ||
| 79 | 1 | avio_w8(pb, VOC_TYPE_VOICE_DATA); | |
| 80 | 1 | avio_wl24(pb, pkt->size + 2); | |
| 81 | 1 | avio_w8(pb, 256 - (1000000 + par->sample_rate/2) / par->sample_rate); | |
| 82 | 1 | avio_w8(pb, par->codec_tag); | |
| 83 | } | ||
| 84 | 2 | voc->param_written = 1; | |
| 85 | } else { | ||
| 86 | 20 | avio_w8(pb, VOC_TYPE_VOICE_DATA_CONT); | |
| 87 | 20 | avio_wl24(pb, pkt->size); | |
| 88 | } | ||
| 89 | |||
| 90 | 22 | avio_write(pb, pkt->data, pkt->size); | |
| 91 | 22 | return 0; | |
| 92 | } | ||
| 93 | |||
| 94 | 2 | static int voc_write_trailer(AVFormatContext *s) | |
| 95 | { | ||
| 96 | 2 | avio_w8(s->pb, 0); | |
| 97 | 2 | return 0; | |
| 98 | } | ||
| 99 | |||
| 100 | const FFOutputFormat ff_voc_muxer = { | ||
| 101 | .p.name = "voc", | ||
| 102 | .p.long_name = NULL_IF_CONFIG_SMALL("Creative Voice"), | ||
| 103 | .p.mime_type = "audio/x-voc", | ||
| 104 | .p.extensions = "voc", | ||
| 105 | .priv_data_size = sizeof(VocEncContext), | ||
| 106 | .p.audio_codec = AV_CODEC_ID_PCM_S16LE, | ||
| 107 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 108 | .write_header = voc_write_header, | ||
| 109 | .write_packet = voc_write_packet, | ||
| 110 | .write_trailer = voc_write_trailer, | ||
| 111 | .p.codec_tag = ff_voc_codec_tags_list, | ||
| 112 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 113 | }; | ||
| 114 |