| 1 | /* |
| 2 | * Copyright (c) 2011 Anton Khirnov <anton@khirnov.net> |
| 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 | /** |
| 22 | * @file |
| 23 | * libcdio CD grabbing |
| 24 | */ |
| 25 | |
| 26 | #include "config.h" |
| 27 | |
| 28 | #if HAVE_CDIO_PARANOIA_H |
| 29 | #include <cdio/cdda.h> |
| 30 | #include <cdio/paranoia.h> |
| 31 | #elif HAVE_CDIO_PARANOIA_PARANOIA_H |
| 32 | #include <cdio/paranoia/cdda.h> |
| 33 | #include <cdio/paranoia/paranoia.h> |
| 34 | #endif |
| 35 | |
| 36 | #include "libavutil/log.h" |
| 37 | #include "libavutil/mem.h" |
| 38 | #include "libavutil/opt.h" |
| 39 | |
| 40 | #include "libavformat/avformat.h" |
| 41 | #include "libavformat/internal.h" |
| 42 | |
| 43 | typedef struct CDIOContext { |
| 44 | const AVClass *class; |
| 45 | cdrom_drive_t *drive; |
| 46 | cdrom_paranoia_t *paranoia; |
| 47 | int32_t last_sector; |
| 48 | |
| 49 | /* private options */ |
| 50 | int speed; |
| 51 | int paranoia_mode; |
| 52 | } CDIOContext; |
| 53 | |
| 54 | static av_cold int read_header(AVFormatContext *ctx) |
| 55 | { |
| 56 | CDIOContext *s = ctx->priv_data; |
| 57 | AVStream *st; |
| 58 | int ret, i; |
| 59 | char *err = NULL; |
| 60 | |
| 61 | if (!(st = avformat_new_stream(ctx, NULL))) |
| 62 | return AVERROR(ENOMEM); |
| 63 | s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err); |
| 64 | if (!s->drive) { |
| 65 | av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename); |
| 66 | return AVERROR(EINVAL); |
| 67 | } |
| 68 | if (err) { |
| 69 | av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); |
| 70 | free(err); |
| 71 | } |
| 72 | if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) { |
| 73 | av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename); |
| 74 | return AVERROR(EINVAL); |
| 75 | } |
| 76 | |
| 77 | cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); |
| 78 | if (s->speed) |
| 79 | cdio_cddap_speed_set(s->drive, s->speed); |
| 80 | |
| 81 | s->paranoia = cdio_paranoia_init(s->drive); |
| 82 | if (!s->paranoia) { |
| 83 | av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n"); |
| 84 | return AVERROR(EINVAL); |
| 85 | } |
| 86 | cdio_paranoia_modeset(s->paranoia, s->paranoia_mode); |
| 87 | |
| 88 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 89 | if (s->drive->bigendianp) |
| 90 | st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; |
| 91 | else |
| 92 | st->codec->codec_id = AV_CODEC_ID_PCM_S16LE; |
| 93 | st->codec->sample_rate = 44100; |
| 94 | st->codec->channels = 2; |
| 95 | if (s->drive->audio_last_sector != CDIO_INVALID_LSN && |
| 96 | s->drive->audio_first_sector != CDIO_INVALID_LSN) |
| 97 | st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector; |
| 98 | else if (s->drive->tracks) |
| 99 | st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector; |
| 100 | avpriv_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate); |
| 101 | |
| 102 | for (i = 0; i < s->drive->tracks; i++) { |
| 103 | char title[16]; |
| 104 | snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack); |
| 105 | avpriv_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector, |
| 106 | s->drive->disc_toc[i+1].dwStartSector, title); |
| 107 | } |
| 108 | |
| 109 | s->last_sector = cdio_cddap_disc_lastsector(s->drive); |
| 110 | |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | static int read_packet(AVFormatContext *ctx, AVPacket *pkt) |
| 115 | { |
| 116 | CDIOContext *s = ctx->priv_data; |
| 117 | int ret; |
| 118 | uint16_t *buf; |
| 119 | char *err = NULL; |
| 120 | |
| 121 | if (ctx->streams[0]->cur_dts > s->last_sector) |
| 122 | return AVERROR_EOF; |
| 123 | |
| 124 | buf = cdio_paranoia_read(s->paranoia, NULL); |
| 125 | if (!buf) |
| 126 | return AVERROR_EOF; |
| 127 | |
| 128 | if (err = cdio_cddap_errors(s->drive)) { |
| 129 | av_log(ctx, AV_LOG_ERROR, "%s\n", err); |
| 130 | free(err); |
| 131 | err = NULL; |
| 132 | } |
| 133 | if (err = cdio_cddap_messages(s->drive)) { |
| 134 | av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); |
| 135 | free(err); |
| 136 | err = NULL; |
| 137 | } |
| 138 | |
| 139 | if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0) |
| 140 | return ret; |
| 141 | memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW); |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | static av_cold int read_close(AVFormatContext *ctx) |
| 146 | { |
| 147 | CDIOContext *s = ctx->priv_data; |
| 148 | cdio_paranoia_free(s->paranoia); |
| 149 | cdio_cddap_close(s->drive); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, |
| 154 | int flags) |
| 155 | { |
| 156 | CDIOContext *s = ctx->priv_data; |
| 157 | AVStream *st = ctx->streams[0]; |
| 158 | |
| 159 | cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); |
| 160 | st->cur_dts = timestamp; |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | #define OFFSET(x) offsetof(CDIOContext, x) |
| 165 | #define DEC AV_OPT_FLAG_DECODING_PARAM |
| 166 | static const AVOption options[] = { |
| 167 | { "speed", "Drive reading speed.", OFFSET(speed), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC }, |
| 168 | { "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, |
| 169 | { "verify", "Verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, |
| 170 | { "overlap", "Perform overlapped reads.", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, |
| 171 | { "neverskip", "Do not skip failed reads.", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, |
| 172 | { NULL }, |
| 173 | }; |
| 174 | |
| 175 | static const AVClass libcdio_class = { |
| 176 | .class_name = "libcdio indev", |
| 177 | .item_name = av_default_item_name, |
| 178 | .option = options, |
| 179 | .version = LIBAVUTIL_VERSION_INT, |
| 180 | .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT, |
| 181 | }; |
| 182 | |
| 183 | AVInputFormat ff_libcdio_demuxer = { |
| 184 | .name = "libcdio", |
| 185 | .read_header = read_header, |
| 186 | .read_packet = read_packet, |
| 187 | .read_close = read_close, |
| 188 | .read_seek = read_seek, |
| 189 | .priv_data_size = sizeof(CDIOContext), |
| 190 | .flags = AVFMT_NOFILE, |
| 191 | .priv_class = &libcdio_class, |
| 192 | }; |