mirror of https://git.ffmpeg.org/ffmpeg.git
193 lines
6.6 KiB
C
193 lines
6.6 KiB
C
/*
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* Copyright (c) 2011 Anton Khirnov <anton@khirnov.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* libcdio CD grabbing
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*/
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#include "config.h"
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#if HAVE_CDIO_PARANOIA_H
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#include <cdio/cdda.h>
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#include <cdio/paranoia.h>
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#elif HAVE_CDIO_PARANOIA_PARANOIA_H
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#include <cdio/paranoia/cdda.h>
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#include <cdio/paranoia/paranoia.h>
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#endif
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavformat/avformat.h"
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#include "libavformat/demux.h"
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#include "libavformat/internal.h"
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typedef struct CDIOContext {
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const AVClass *class;
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cdrom_drive_t *drive;
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cdrom_paranoia_t *paranoia;
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int32_t last_sector;
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/* private options */
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int speed;
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int paranoia_mode;
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} CDIOContext;
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static av_cold int read_header(AVFormatContext *ctx)
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{
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CDIOContext *s = ctx->priv_data;
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AVStream *st;
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int ret, i;
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char *err = NULL;
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if (!(st = avformat_new_stream(ctx, NULL)))
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return AVERROR(ENOMEM);
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s->drive = cdio_cddap_identify(ctx->url, CDDA_MESSAGE_LOGIT, &err);
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if (!s->drive) {
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av_log(ctx, AV_LOG_ERROR, "Could not open drive %s.\n", ctx->url);
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return AVERROR(EINVAL);
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}
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if (err) {
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av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
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free(err);
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}
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if ((ret = cdio_cddap_open(s->drive)) < 0 || !s->drive->opened) {
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av_log(ctx, AV_LOG_ERROR, "Could not open disk in drive %s.\n", ctx->url);
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return AVERROR(EINVAL);
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}
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cdio_cddap_verbose_set(s->drive, CDDA_MESSAGE_LOGIT, CDDA_MESSAGE_LOGIT);
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if (s->speed)
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cdio_cddap_speed_set(s->drive, s->speed);
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s->paranoia = cdio_paranoia_init(s->drive);
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if (!s->paranoia) {
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av_log(ctx, AV_LOG_ERROR, "Could not init paranoia.\n");
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return AVERROR(EINVAL);
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}
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cdio_paranoia_modeset(s->paranoia, s->paranoia_mode);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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if (s->drive->bigendianp)
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st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
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else
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st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
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st->codecpar->sample_rate = 44100;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
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if (s->drive->audio_last_sector != CDIO_INVALID_LSN &&
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s->drive->audio_first_sector != CDIO_INVALID_LSN)
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st->duration = s->drive->audio_last_sector - s->drive->audio_first_sector;
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else if (s->drive->tracks)
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st->duration = s->drive->disc_toc[s->drive->tracks].dwStartSector;
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avpriv_set_pts_info(st, 64, CDIO_CD_FRAMESIZE_RAW,
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2 * st->codecpar->ch_layout.nb_channels * st->codecpar->sample_rate);
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for (i = 0; i < s->drive->tracks; i++) {
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char title[16];
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snprintf(title, sizeof(title), "track %02d", s->drive->disc_toc[i].bTrack);
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avpriv_new_chapter(ctx, i, st->time_base, s->drive->disc_toc[i].dwStartSector,
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s->drive->disc_toc[i+1].dwStartSector, title);
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}
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s->last_sector = cdio_cddap_disc_lastsector(s->drive);
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return 0;
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}
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static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
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{
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CDIOContext *s = ctx->priv_data;
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int ret;
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uint16_t *buf;
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char *err = NULL;
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buf = cdio_paranoia_read(s->paranoia, NULL);
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if (!buf)
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return AVERROR_EOF;
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if (err = cdio_cddap_errors(s->drive)) {
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av_log(ctx, AV_LOG_ERROR, "%s\n", err);
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free(err);
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err = NULL;
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}
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if (err = cdio_cddap_messages(s->drive)) {
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av_log(ctx, AV_LOG_VERBOSE, "%s\n", err);
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free(err);
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err = NULL;
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}
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if ((ret = av_new_packet(pkt, CDIO_CD_FRAMESIZE_RAW)) < 0)
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return ret;
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memcpy(pkt->data, buf, CDIO_CD_FRAMESIZE_RAW);
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return 0;
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}
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static av_cold int read_close(AVFormatContext *ctx)
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{
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CDIOContext *s = ctx->priv_data;
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cdio_paranoia_free(s->paranoia);
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cdio_cddap_close(s->drive);
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return 0;
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}
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static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp,
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int flags)
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{
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CDIOContext *s = ctx->priv_data;
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AVStream *st = ctx->streams[0];
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cdio_paranoia_seek(s->paranoia, timestamp, SEEK_SET);
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avpriv_update_cur_dts(ctx, st, timestamp);
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return 0;
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}
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#define OFFSET(x) offsetof(CDIOContext, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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{ "speed", "set drive reading speed", OFFSET(speed), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
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{ "paranoia_mode", "set error recovery mode", OFFSET(paranoia_mode), AV_OPT_TYPE_FLAGS, { .i64 = PARANOIA_MODE_DISABLE }, INT_MIN, INT_MAX, DEC, .unit = "paranoia_mode" },
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{ "disable", "apply no fixups", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_DISABLE }, 0, 0, DEC, .unit = "paranoia_mode" },
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{ "verify", "verify data integrity in overlap area", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_VERIFY }, 0, 0, DEC, .unit = "paranoia_mode" },
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{ "overlap", "perform overlapped reads", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_OVERLAP }, 0, 0, DEC, .unit = "paranoia_mode" },
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{ "neverskip", "do not skip failed reads", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_NEVERSKIP }, 0, 0, DEC, .unit = "paranoia_mode" },
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{ "full", "apply all recovery modes", 0, AV_OPT_TYPE_CONST, { .i64 = PARANOIA_MODE_FULL }, 0, 0, DEC, .unit = "paranoia_mode" },
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{ NULL },
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};
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static const AVClass libcdio_class = {
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.class_name = "libcdio indev",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
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};
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const FFInputFormat ff_libcdio_demuxer = {
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.p.name = "libcdio",
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.p.flags = AVFMT_NOFILE,
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.p.priv_class = &libcdio_class,
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.read_header = read_header,
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.read_packet = read_packet,
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.read_close = read_close,
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.read_seek = read_seek,
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.priv_data_size = sizeof(CDIOContext),
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};
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