[deb_ffmpeg.git] / ffmpeg / libavformat / dtshddec.c

/*
 * Raw DTS-HD demuxer
 * Copyright (c) 2012 Paul B Mahol
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "avformat.h"

#define AUPR_HDR 0x415550522D484452
#define AUPRINFO 0x41555052494E464F
#define BITSHVTB 0x4249545348565442
#define BLACKOUT 0x424C41434B4F5554
#define BRANCHPT 0x4252414E43485054
#define BUILDVER 0x4255494C44564552
#define CORESSMD 0x434F524553534D44
#define DTSHDHDR 0x4454534844484452
#define EXTSS_MD 0x45585453535f4d44
#define FILEINFO 0x46494C45494E464F
#define NAVI_TBL 0x4E4156492D54424C
#define STRMDATA 0x5354524D44415441
#define TIMECODE 0x54494D45434F4445

typedef struct DTSHDDemuxContext {
    uint64_t    data_end;
} DTSHDDemuxContext;

static int dtshd_probe(AVProbeData *p)
{
    if (AV_RB64(p->buf) == DTSHDHDR)
        return AVPROBE_SCORE_MAX;
    return 0;
}

static int dtshd_read_header(AVFormatContext *s)
{
    DTSHDDemuxContext *dtshd = s->priv_data;
    AVIOContext *pb = s->pb;
    uint64_t chunk_type, chunk_size;
    AVStream *st;
    int ret;
    char *value;

    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id   = AV_CODEC_ID_DTS;
    st->need_parsing      = AVSTREAM_PARSE_FULL_RAW;

    while (!avio_feof(pb)) {
        chunk_type = avio_rb64(pb);
        chunk_size = avio_rb64(pb);

        if (chunk_size < 4) {
            av_log(s, AV_LOG_ERROR, "chunk size too small\n");
            return AVERROR_INVALIDDATA;
        }
        if (chunk_size > ((uint64_t)1 << 61)) {
            av_log(s, AV_LOG_ERROR, "chunk size too big\n");
            return AVERROR_INVALIDDATA;
        }

        switch (chunk_type) {
        case STRMDATA:
            dtshd->data_end = chunk_size + avio_tell(pb);
            if (dtshd->data_end <= chunk_size)
                return AVERROR_INVALIDDATA;
            return 0;
            break;
        case FILEINFO:
            if (chunk_size > INT_MAX)
                goto skip;
            value = av_malloc(chunk_size);
            if (!value)
                goto skip;
            avio_read(pb, value, chunk_size);
            value[chunk_size - 1] = 0;
            av_dict_set(&s->metadata, "fileinfo", value,
                        AV_DICT_DONT_STRDUP_VAL);
            break;
        default:
skip:
            ret = avio_skip(pb, chunk_size);
            if (ret < 0)
                return ret;
        };
    }

    return AVERROR_EOF;
}

static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    DTSHDDemuxContext *dtshd = s->priv_data;
    int64_t size, left;
    int ret;

    left = dtshd->data_end - avio_tell(s->pb);
    size = FFMIN(left, 1024);
    if (size <= 0)
        return AVERROR_EOF;

    ret = av_get_packet(s->pb, pkt, size);
    if (ret < 0)
        return ret;

    pkt->stream_index = 0;

    return ret;
}

AVInputFormat ff_dtshd_demuxer = {
    .name           = "dtshd",
    .long_name      = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
    .priv_data_size = sizeof(DTSHDDemuxContext),
    .read_probe     = dtshd_probe,
    .read_header    = dtshd_read_header,
    .read_packet    = raw_read_packet,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "dtshd",
    .raw_codec_id   = AV_CODEC_ID_DTS,
};
Commit	Line	Data
	1	/*
	2	* Raw DTS-HD demuxer
	3	* Copyright (c) 2012 Paul B Mahol
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	#include "libavutil/intreadwrite.h"
	23	#include "libavutil/dict.h"
	24	#include "avformat.h"
	25
	26	#define AUPR_HDR 0x415550522D484452
	27	#define AUPRINFO 0x41555052494E464F
	28	#define BITSHVTB 0x4249545348565442
	29	#define BLACKOUT 0x424C41434B4F5554
	30	#define BRANCHPT 0x4252414E43485054
	31	#define BUILDVER 0x4255494C44564552
	32	#define CORESSMD 0x434F524553534D44
	33	#define DTSHDHDR 0x4454534844484452
	34	#define EXTSS_MD 0x45585453535f4d44
	35	#define FILEINFO 0x46494C45494E464F
	36	#define NAVI_TBL 0x4E4156492D54424C
	37	#define STRMDATA 0x5354524D44415441
	38	#define TIMECODE 0x54494D45434F4445
	39
	40	typedef struct DTSHDDemuxContext {
	41	uint64_t data_end;
	42	} DTSHDDemuxContext;
	43
	44	static int dtshd_probe(AVProbeData *p)
	45	{
	46	if (AV_RB64(p->buf) == DTSHDHDR)
	47	return AVPROBE_SCORE_MAX;
	48	return 0;
	49	}
	50
	51	static int dtshd_read_header(AVFormatContext *s)
	52	{
	53	DTSHDDemuxContext *dtshd = s->priv_data;
	54	AVIOContext *pb = s->pb;
	55	uint64_t chunk_type, chunk_size;
	56	AVStream *st;
	57	int ret;
	58	char *value;
	59
	60	st = avformat_new_stream(s, NULL);
	61	if (!st)
	62	return AVERROR(ENOMEM);
	63	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
	64	st->codec->codec_id = AV_CODEC_ID_DTS;
	65	st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
	66
	67	while (!avio_feof(pb)) {
	68	chunk_type = avio_rb64(pb);
	69	chunk_size = avio_rb64(pb);
	70
	71	if (chunk_size < 4) {
	72	av_log(s, AV_LOG_ERROR, "chunk size too small\n");
	73	return AVERROR_INVALIDDATA;
	74	}
	75	if (chunk_size > ((uint64_t)1 << 61)) {
	76	av_log(s, AV_LOG_ERROR, "chunk size too big\n");
	77	return AVERROR_INVALIDDATA;
	78	}
	79
	80	switch (chunk_type) {
	81	case STRMDATA:
	82	dtshd->data_end = chunk_size + avio_tell(pb);
	83	if (dtshd->data_end <= chunk_size)
	84	return AVERROR_INVALIDDATA;
	85	return 0;
	86	break;
	87	case FILEINFO:
	88	if (chunk_size > INT_MAX)
	89	goto skip;
	90	value = av_malloc(chunk_size);
	91	if (!value)
	92	goto skip;
	93	avio_read(pb, value, chunk_size);
	94	value[chunk_size - 1] = 0;
	95	av_dict_set(&s->metadata, "fileinfo", value,
	96	AV_DICT_DONT_STRDUP_VAL);
	97	break;
	98	default:
	99	skip:
	100	ret = avio_skip(pb, chunk_size);
	101	if (ret < 0)
	102	return ret;
	103	};
	104	}
	105
	106	return AVERROR_EOF;
	107	}
	108
	109	static int raw_read_packet(AVFormatContext s, AVPacket pkt)
	110	{
	111	DTSHDDemuxContext *dtshd = s->priv_data;
	112	int64_t size, left;
	113	int ret;
	114
	115	left = dtshd->data_end - avio_tell(s->pb);
	116	size = FFMIN(left, 1024);
	117	if (size <= 0)
	118	return AVERROR_EOF;
	119
	120	ret = av_get_packet(s->pb, pkt, size);
	121	if (ret < 0)
	122	return ret;
	123
	124	pkt->stream_index = 0;
	125
	126	return ret;
	127	}
	128
	129	AVInputFormat ff_dtshd_demuxer = {
	130	.name = "dtshd",
	131	.long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
	132	.priv_data_size = sizeof(DTSHDDemuxContext),
	133	.read_probe = dtshd_probe,
	134	.read_header = dtshd_read_header,
	135	.read_packet = raw_read_packet,
	136	.flags = AVFMT_GENERIC_INDEX,
	137	.extensions = "dtshd",
	138	.raw_codec_id = AV_CODEC_ID_DTS,
	139	};