1/* 2 * Copyright (c) 2011 Anton Khirnov <anton@khirnov.net> 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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 <cdio/cdda.h> 27#include <cdio/paranoia.h> 28 29#include "libavutil/log.h" 30#include "libavutil/mem.h" 31#include "libavutil/opt.h" 32 33#include "libavformat/avformat.h" 34#include "libavformat/internal.h" 35 36/* cdio returns some malloced strings that need to be free()d */ 37#undef free 38 39typedef struct CDIOContext { 40 cdrom_drive_t *drive; 41 cdrom_paranoia_t *paranoia; 42 int32_t last_sector; 43 44 /* private options */ 45 int speed; 46 int paranoia_mode; 47} CDIOContext; 48 49static av_cold int read_header(AVFormatContext *ctx, AVFormatParameters *ap) 50{ 51 CDIOContext *s = ctx->priv_data; 52 AVStream *st; 53 int ret, i; 54 char *err = NULL; 55 56 if (!(st = avformat_new_stream(ctx, NULL))) 57 return AVERROR(ENOMEM); 58 s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err); 59 if (!s->drive) { 60 av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename); 61 return AVERROR(EINVAL); 62 } 63 if (err) { 64 av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); 65 free(err); 66 } 67 if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) { 68 av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename); 69 return AVERROR(EINVAL); 70 } 71 72 cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); 73 if (s->speed) 74 cdio_cddap_speed_set(s->drive, s->speed); 75 76 s->paranoia = cdio_paranoia_init(s->drive); 77 if (!s->paranoia) { 78 av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n"); 79 return AVERROR(EINVAL); 80 } 81 cdio_paranoia_modeset(s->paranoia, s->paranoia_mode); 82 83 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 84 if (s->drive->bigendianp) 85 st->codec->codec_id = CODEC_ID_PCM_S16BE; 86 else 87 st->codec->codec_id = CODEC_ID_PCM_S16LE; 88 st->codec->sample_rate = 44100; 89 st->codec->channels = 2; 90 if (s->drive->audio_last_sector != CDIO_INVALID_LSN && 91 s->drive->audio_first_sector != CDIO_INVALID_LSN) 92 st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector; 93 else if (s->drive->tracks) 94 st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector; 95 avpriv_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate); 96 97 for (i = 0; i < s->drive->tracks; i++) { 98 char title[16]; 99 snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack); 100 avpriv_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector, 101 s->drive->disc_toc[i+1].dwStartSector, title); 102 } 103 104 s->last_sector = cdio_cddap_disc_lastsector(s->drive); 105 106 return 0; 107} 108 109static int read_packet(AVFormatContext *ctx, AVPacket *pkt) 110{ 111 CDIOContext *s = ctx->priv_data; 112 int ret; 113 uint16_t *buf; 114 char *err = NULL; 115 116 if (ctx->streams[0]->cur_dts > s->last_sector) 117 return AVERROR_EOF; 118 119 buf = cdio_paranoia_read(s->paranoia, NULL); 120 if (!buf) 121 return AVERROR_EOF; 122 123 if (err = cdio_cddap_errors(s->drive)) { 124 av_log(ctx, AV_LOG_ERROR, "%s\n", err); 125 free(err); 126 err = NULL; 127 } 128 if (err = cdio_cddap_messages(s->drive)) { 129 av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); 130 free(err); 131 err = NULL; 132 } 133 134 if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0) 135 return ret; 136 memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW); 137 return 0; 138} 139 140static av_cold int read_close(AVFormatContext *ctx) 141{ 142 CDIOContext *s = ctx->priv_data; 143 cdio_paranoia_free(s->paranoia); 144 cdio_cddap_close(s->drive); 145 return 0; 146} 147 148static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, 149 int flags) 150{ 151 CDIOContext *s = ctx->priv_data; 152 AVStream *st = ctx->streams[0]; 153 154 cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); 155 st->cur_dts = timestamp; 156 return 0; 157} 158 159#define OFFSET(x) offsetof(CDIOContext, x) 160#define DEC AV_OPT_FLAG_DECODING_PARAM 161static const AVOption options[] = { 162 { "speed", "Drive reading speed.", OFFSET(speed), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC }, 163 { "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, 164 { "verify", "Verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, 165 { "overlap", "Perform overlapped reads.", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, 166 { "neverskip", "Do not skip failed reads.", 0, AV_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, 167 { NULL }, 168}; 169 170static const AVClass libcdio_class = { 171 .class_name = "libcdio indev", 172 .item_name = av_default_item_name, 173 .option = options, 174 .version = LIBAVUTIL_VERSION_INT, 175}; 176 177AVInputFormat ff_libcdio_demuxer = { 178 .name = "libcdio", 179 .read_header = read_header, 180 .read_packet = read_packet, 181 .read_close = read_close, 182 .read_seek = read_seek, 183 .priv_data_size = sizeof(CDIOContext), 184 .flags = AVFMT_NOFILE, 185 .priv_class = &libcdio_class, 186}; 187