From e417d80d2853bbeab90eea073ef4fa4a3fcf9d50 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Tue, 13 Sep 2011 17:23:06 +0200 Subject: lavd: add libcdio-paranoia input device for audio CD grabbing --- libavdevice/libcdio.c | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 libavdevice/libcdio.c (limited to 'libavdevice/libcdio.c') diff --git a/libavdevice/libcdio.c b/libavdevice/libcdio.c new file mode 100644 index 0000000000..be1c516b09 --- /dev/null +++ b/libavdevice/libcdio.c @@ -0,0 +1,186 @@ +/* + * Copyright (c) 2011 Anton Khirnov + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * libcdio CD grabbing + */ + +#include +#include + +#include "libavutil/log.h" +#include "libavutil/mem.h" +#include "libavutil/opt.h" + +#include "libavformat/avformat.h" +#include "libavformat/internal.h" + +/* cdio returns some malloced strings that need to be free()d */ +#undef free + +typedef struct CDIOContext { + cdrom_drive_t *drive; + cdrom_paranoia_t *paranoia; + int32_t last_sector; + + /* private options */ + int speed; + int paranoia_mode; +} CDIOContext; + +static av_cold int read_header(AVFormatContext *ctx, AVFormatParameters *ap) +{ + CDIOContext *s = ctx->priv_data; + AVStream *st; + int ret, i; + char *err = NULL; + + if (!(st = av_new_stream(ctx, 0))) + return AVERROR(ENOMEM); + s->drive = cdio_cddap_identify(ctx->filename, CDDA_MESSAGE_LOGIT, &err); + if (!s->drive) { + av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->filename); + return AVERROR(EINVAL); + } + if (err) { + av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); + free(err); + } + if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) { + av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->filename); + return AVERROR(EINVAL); + } + + cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT); + if (s->speed) + cdio_cddap_speed_set(s->drive, s->speed); + + s->paranoia = cdio_paranoia_init(s->drive); + if (!s->paranoia) { + av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n"); + return AVERROR(EINVAL); + } + cdio_paranoia_modeset(s->paranoia, s->paranoia_mode); + + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + if (s->drive->bigendianp) + st->codec->codec_id = CODEC_ID_PCM_S16BE; + else + st->codec->codec_id = CODEC_ID_PCM_S16LE; + st->codec->sample_rate = 44100; + st->codec->channels = 2; + if (s->drive->audio_last_sector != CDIO_INVALID_LSN && + s->drive->audio_first_sector != CDIO_INVALID_LSN) + st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector; + else if (s->drive->tracks) + st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector; + av_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW, 2*st->codec->channels*st->codec->sample_rate); + + for (i = 0; i < s->drive->tracks; i++) { + char title[16]; + snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack); + ff_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector, + s->drive->disc_toc[i+1].dwStartSector, title); + } + + s->last_sector = cdio_cddap_disc_lastsector(s->drive); + + return 0; +} + +static int read_packet(AVFormatContext *ctx, AVPacket *pkt) +{ + CDIOContext *s = ctx->priv_data; + int ret; + uint16_t *buf; + char *err = NULL; + + if (ctx->streams[0]->cur_dts > s->last_sector) + return AVERROR_EOF; + + buf = cdio_paranoia_read(s->paranoia, NULL); + if (!buf) + return AVERROR_EOF; + + if (err = cdio_cddap_errors(s->drive)) { + av_log(ctx, AV_LOG_ERROR, "%s\n", err); + free(err); + err = NULL; + } + if (err = cdio_cddap_messages(s->drive)) { + av_log(ctx, AV_LOG_VERBOSE, "%s\n", err); + free(err); + err = NULL; + } + + if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0) + return ret; + memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW); + return 0; +} + +static av_cold int read_close(AVFormatContext *ctx) +{ + CDIOContext *s = ctx->priv_data; + cdio_paranoia_free(s->paranoia); + cdio_cddap_close(s->drive); + return 0; +} + +static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, + int flags) +{ + CDIOContext *s = ctx->priv_data; + AVStream *st = ctx->streams[0]; + + cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET); + st->cur_dts = timestamp; + return 0; +} + +#define OFFSET(x) offsetof(CDIOContext, x) +#define DEC AV_OPT_FLAG_DECODING_PARAM +static const AVOption options[] = { + { "speed", "Drive reading speed.", OFFSET(speed), FF_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC }, + { "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), FF_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" }, + { "verify", "Verify data integrity in overlap area", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" }, + { "overlap", "Perform overlapped reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" }, + { "neverskip", "Do not skip failed reads.", 0, FF_OPT_TYPE_CONST, { PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, "paranoia_mode" }, + { NULL }, +}; + +static const AVClass libcdio_class = { + .class_name = "libcdio indev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVInputFormat ff_libcdio_demuxer = { + .name = "libcdio", + .read_header = read_header, + .read_packet = read_packet, + .read_close = read_close, + .read_seek = read_seek, + .priv_data_size = sizeof(CDIOContext), + .flags = AVFMT_NOFILE, + .priv_class = &libcdio_class, +}; -- cgit v1.2.3