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/*
* Copyright (c) 2011 Anton Khirnov <anton@khirnov.net>
*
* 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 <cdio/cdda.h>
#include <cdio/paranoia.h>
#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 {
AVClass *class;
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)
{
CDIOContext *s = ctx->priv_data;
AVStream *st;
int ret, i;
char *err = NULL;
if (!(st = avformat_new_stream(ctx, NULL)))
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 = AV_CODEC_ID_PCM_S16BE;
else
st->codec->codec_id = AV_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;
avpriv_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);
avpriv_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), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, DEC },
{ "paranoia_mode", "Error recovery mode.", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { 0 }, INT_MIN, INT_MAX, DEC, "paranoia_mode" },
{ "verify", "Verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY }, 0, 0, DEC, "paranoia_mode" },
{ "overlap", "Perform overlapped reads.", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP }, 0, 0, DEC, "paranoia_mode" },
{ "neverskip", "Do not skip failed reads.", 0, AV_OPT_TYPE_CONST, { .i64 = 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,
};
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