[libav.git] / libavformat / vqf.c

/*
 * VQF demuxer
 * Copyright (c) 2009 Vitor Sessak
 *
 * 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
 */

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

typedef struct VqfContext {
    int frame_bit_len;
    uint8_t last_frame_bits;
    int remaining_bits;
} VqfContext;

static int vqf_probe(AVProbeData *probe_packet)
{
    if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N'))
        return 0;

    if (!memcmp(probe_packet->buf + 4, "97012000", 8))
        return AVPROBE_SCORE_MAX;

    if (!memcmp(probe_packet->buf + 4, "00052200", 8))
        return AVPROBE_SCORE_MAX;

    return AVPROBE_SCORE_MAX/2;
}

static void add_metadata(AVFormatContext *s, const char *tag,
                         unsigned int tag_len, unsigned int remaining)
{
    int len = FFMIN(tag_len, remaining);
    char *buf;

    if (len == UINT_MAX)
        return;

    buf = av_malloc(len+1);
    if (!buf)
        return;
    avio_read(s->pb, buf, len);
    buf[len] = 0;
    av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
}

static int vqf_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
    VqfContext *c = s->priv_data;
    AVStream *st  = avformat_new_stream(s, NULL);
    int chunk_tag;
    int rate_flag = -1;
    int header_size;
    int read_bitrate = 0;
    int size;
    uint8_t comm_chunk[12];

    if (!st)
        return AVERROR(ENOMEM);

    avio_skip(s->pb, 12);

    header_size = avio_rb32(s->pb);

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id   = CODEC_ID_TWINVQ;
    st->start_time = 0;

    do {
        int len;
        chunk_tag = avio_rl32(s->pb);

        if (chunk_tag == MKTAG('D','A','T','A'))
            break;

        len = avio_rb32(s->pb);

        if ((unsigned) len > INT_MAX/2) {
            av_log(s, AV_LOG_ERROR, "Malformed header\n");
            return -1;
        }

        header_size -= 8;

        switch(chunk_tag){
        case MKTAG('C','O','M','M'):
            avio_read(s->pb, comm_chunk, 12);
            st->codec->channels = AV_RB32(comm_chunk    ) + 1;
            read_bitrate        = AV_RB32(comm_chunk + 4);
            rate_flag           = AV_RB32(comm_chunk + 8);
            avio_skip(s->pb, len-12);

            st->codec->bit_rate              = read_bitrate*1000;
            break;
        case MKTAG('N','A','M','E'):
            add_metadata(s, "title"    , len, header_size);
            break;
        case MKTAG('(','c',')',' '):
            add_metadata(s, "copyright", len, header_size);
            break;
        case MKTAG('A','U','T','H'):
            add_metadata(s, "author"   , len, header_size);
            break;
        case MKTAG('A','L','B','M'):
            add_metadata(s, "album"    , len, header_size);
            break;
        case MKTAG('T','R','C','K'):
            add_metadata(s, "track"    , len, header_size);
            break;
        case MKTAG('C','O','M','T'):
            add_metadata(s, "comment"  , len, header_size);
            break;
        case MKTAG('F','I','L','E'):
            add_metadata(s, "filename" , len, header_size);
            break;
        case MKTAG('D','S','I','Z'):
            add_metadata(s, "size"     , len, header_size);
            break;
        case MKTAG('D','A','T','E'):
            add_metadata(s, "date"     , len, header_size);
            break;
        case MKTAG('G','E','N','R'):
            add_metadata(s, "genre"    , len, header_size);
            break;
        default:
            av_log(s, AV_LOG_ERROR, "Unknown chunk: %c%c%c%c\n",
                   ((char*)&chunk_tag)[0], ((char*)&chunk_tag)[1],
                   ((char*)&chunk_tag)[2], ((char*)&chunk_tag)[3]);
            avio_skip(s->pb, FFMIN(len, header_size));
            break;
        }

        header_size -= len;

    } while (header_size >= 0);

    switch (rate_flag) {
    case -1:
        av_log(s, AV_LOG_ERROR, "COMM tag not found!\n");
        return -1;
    case 44:
        st->codec->sample_rate = 44100;
        break;
    case 22:
        st->codec->sample_rate = 22050;
        break;
    case 11:
        st->codec->sample_rate = 11025;
        break;
    default:
        st->codec->sample_rate = rate_flag*1000;
        break;
    }

    switch (((st->codec->sample_rate/1000) << 8) +
            read_bitrate/st->codec->channels) {
    case (11<<8) + 8 :
    case (8 <<8) + 8 :
    case (11<<8) + 10:
    case (22<<8) + 32:
        size = 512;
        break;
    case (16<<8) + 16:
    case (22<<8) + 20:
    case (22<<8) + 24:
        size = 1024;
        break;
    case (44<<8) + 40:
    case (44<<8) + 48:
        size = 2048;
        break;
    default:
        av_log(s, AV_LOG_ERROR, "Mode not suported: %d Hz, %d kb/s.\n",
               st->codec->sample_rate, st->codec->bit_rate);
        return -1;
    }
    c->frame_bit_len = st->codec->bit_rate*size/st->codec->sample_rate;
    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

    /* put first 12 bytes of COMM chunk in extradata */
    if (!(st->codec->extradata = av_malloc(12 + FF_INPUT_BUFFER_PADDING_SIZE)))
        return AVERROR(ENOMEM);
    st->codec->extradata_size = 12;
    memcpy(st->codec->extradata, comm_chunk, 12);

    return 0;
}

static int vqf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    VqfContext *c = s->priv_data;
    int ret;
    int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;

    pkt->pos          = avio_tell(s->pb);
    pkt->stream_index = 0;

    if (av_new_packet(pkt, size+2) < 0)
        return AVERROR(EIO);

    pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip
    pkt->data[1] = c->last_frame_bits;
    ret = avio_read(s->pb, pkt->data+2, size);

    if (ret<=0) {
        av_free_packet(pkt);
        return AVERROR(EIO);
    }

    c->last_frame_bits = pkt->data[size+1];
    c->remaining_bits  = (size << 3) - c->frame_bit_len + c->remaining_bits;

    return size+2;
}

static int vqf_read_seek(AVFormatContext *s,
                         int stream_index, int64_t timestamp, int flags)
{
    VqfContext *c = s->priv_data;
    AVStream *st;
    int ret;
    int64_t pos;

    st = s->streams[stream_index];
    pos = av_rescale_rnd(timestamp * st->codec->bit_rate,
                         st->time_base.num,
                         st->time_base.den * (int64_t)c->frame_bit_len,
                         (flags & AVSEEK_FLAG_BACKWARD) ?
                                                   AV_ROUND_DOWN : AV_ROUND_UP);
    pos *= c->frame_bit_len;

    st->cur_dts = av_rescale(pos, st->time_base.den,
                             st->codec->bit_rate * (int64_t)st->time_base.num);

    if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0)
        return ret;

    c->remaining_bits = -7 - ((pos-7)&7);
    return 0;
}

AVInputFormat ff_vqf_demuxer = {
    .name           = "vqf",
    .long_name      = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"),
    .priv_data_size = sizeof(VqfContext),
    .read_probe     = vqf_probe,
    .read_header    = vqf_read_header,
    .read_packet    = vqf_read_packet,
    .read_seek      = vqf_read_seek,
    .extensions     = "vqf,vql,vqe",
};
Commit	Line	Data
616e899c VS	1	/*
	2	* VQF demuxer
	3	* Copyright (c) 2009 Vitor Sessak
	4	*
2912e87a	5	* This file is part of Libav.
616e899c	6	*
2912e87a	7	* Libav is free software; you can redistribute it and/or
616e899c VS	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	*
2912e87a	12	* Libav is distributed in the hope that it will be useful,
616e899c VS	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
2912e87a	18	* License along with Libav; if not, write to the Free Software
616e899c VS	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	#include "avformat.h"
c3f9ebf7	23	#include "internal.h"
616e899c	24	#include "libavutil/intreadwrite.h"
d2d67e42	25	#include "libavutil/dict.h"
0ebcdf5c	26	#include "libavutil/mathematics.h"
616e899c VS	27
	28	typedef struct VqfContext {
	29	int frame_bit_len;
	30	uint8_t last_frame_bits;
	31	int remaining_bits;
	32	} VqfContext;
	33
	34	static int vqf_probe(AVProbeData *probe_packet)
	35	{
	36	if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N'))
	37	return 0;
	38
	39	if (!memcmp(probe_packet->buf + 4, "97012000", 8))
	40	return AVPROBE_SCORE_MAX;
	41
	42	if (!memcmp(probe_packet->buf + 4, "00052200", 8))
	43	return AVPROBE_SCORE_MAX;
	44
	45	return AVPROBE_SCORE_MAX/2;
	46	}
	47
	48	static void add_metadata(AVFormatContext s, const char tag,
	49	unsigned int tag_len, unsigned int remaining)
	50	{
12ad6671 MN	51	int len = FFMIN(tag_len, remaining);
12ad6671 MN	52	char *buf;
616e899c	53
12ad6671 MN	54	if (len == UINT_MAX)
12ad6671 MN	55	return;
616e899c	56
12ad6671 MN	57	buf = av_malloc(len+1);
	58	if (!buf)
	59	return;
b7effd4e	60	avio_read(s->pb, buf, len);
616e899c	61	buf[len] = 0;
d2d67e42	62	av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
616e899c VS	63	}
	64
	65	static int vqf_read_header(AVFormatContext s, AVFormatParameters ap)
	66	{
	67	VqfContext *c = s->priv_data;
3b3bbdd3	68	AVStream *st = avformat_new_stream(s, NULL);
616e899c VS	69	int chunk_tag;
	70	int rate_flag = -1;
	71	int header_size;
	72	int read_bitrate = 0;
	73	int size;
7b966566	74	uint8_t comm_chunk[12];
616e899c VS	75
	76	if (!st)
	77	return AVERROR(ENOMEM);
	78
45a8a02a	79	avio_skip(s->pb, 12);
616e899c	80
b7effd4e	81	header_size = avio_rb32(s->pb);
616e899c	82
72415b2a	83	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
616e899c VS	84	st->codec->codec_id = CODEC_ID_TWINVQ;
	85	st->start_time = 0;
	86
	87	do {
	88	int len;
b7effd4e	89	chunk_tag = avio_rl32(s->pb);
616e899c VS	90
	91	if (chunk_tag == MKTAG('D','A','T','A'))
	92	break;
	93
b7effd4e	94	len = avio_rb32(s->pb);
616e899c VS	95
	96	if ((unsigned) len > INT_MAX/2) {
	97	av_log(s, AV_LOG_ERROR, "Malformed header\n");
	98	return -1;
	99	}
	100
	101	header_size -= 8;
	102
	103	switch(chunk_tag){
	104	case MKTAG('C','O','M','M'):
7b966566 JR	105	avio_read(s->pb, comm_chunk, 12);
	106	st->codec->channels = AV_RB32(comm_chunk ) + 1;
	107	read_bitrate = AV_RB32(comm_chunk + 4);
	108	rate_flag = AV_RB32(comm_chunk + 8);
45a8a02a	109	avio_skip(s->pb, len-12);
616e899c VS	110
616e899c VS	111	st->codec->bit_rate = read_bitrate*1000;
616e899c VS	112	break;
	113	case MKTAG('N','A','M','E'):
	114	add_metadata(s, "title" , len, header_size);
	115	break;
	116	case MKTAG('(','c',')',' '):
	117	add_metadata(s, "copyright", len, header_size);
	118	break;
	119	case MKTAG('A','U','T','H'):
	120	add_metadata(s, "author" , len, header_size);
	121	break;
	122	case MKTAG('A','L','B','M'):
	123	add_metadata(s, "album" , len, header_size);
	124	break;
	125	case MKTAG('T','R','C','K'):
	126	add_metadata(s, "track" , len, header_size);
	127	break;
	128	case MKTAG('C','O','M','T'):
	129	add_metadata(s, "comment" , len, header_size);
	130	break;
	131	case MKTAG('F','I','L','E'):
	132	add_metadata(s, "filename" , len, header_size);
	133	break;
	134	case MKTAG('D','S','I','Z'):
	135	add_metadata(s, "size" , len, header_size);
	136	break;
	137	case MKTAG('D','A','T','E'):
	138	add_metadata(s, "date" , len, header_size);
	139	break;
	140	case MKTAG('G','E','N','R'):
	141	add_metadata(s, "genre" , len, header_size);
	142	break;
	143	default:
	144	av_log(s, AV_LOG_ERROR, "Unknown chunk: %c%c%c%c\n",
	145	((char)&chunk_tag)[0], ((char)&chunk_tag)[1],
	146	((char)&chunk_tag)[2], ((char)&chunk_tag)[3]);
45a8a02a	147	avio_skip(s->pb, FFMIN(len, header_size));
616e899c VS	148	break;
	149	}
	150
	151	header_size -= len;
	152
	153	} while (header_size >= 0);
	154
	155	switch (rate_flag) {
	156	case -1:
	157	av_log(s, AV_LOG_ERROR, "COMM tag not found!\n");
	158	return -1;
	159	case 44:
	160	st->codec->sample_rate = 44100;
	161	break;
	162	case 22:
	163	st->codec->sample_rate = 22050;
	164	break;
	165	case 11:
	166	st->codec->sample_rate = 11025;
	167	break;
	168	default:
	169	st->codec->sample_rate = rate_flag*1000;
	170	break;
	171	}
	172
	173	switch (((st->codec->sample_rate/1000) << 8) +
	174	read_bitrate/st->codec->channels) {
	175	case (11<<8) + 8 :
	176	case (8 <<8) + 8 :
	177	case (11<<8) + 10:
	178	case (22<<8) + 32:
	179	size = 512;
	180	break;
	181	case (16<<8) + 16:
	182	case (22<<8) + 20:
	183	case (22<<8) + 24:
	184	size = 1024;
	185	break;
	186	case (44<<8) + 40:
	187	case (44<<8) + 48:
	188	size = 2048;
	189	break;
	190	default:
	191	av_log(s, AV_LOG_ERROR, "Mode not suported: %d Hz, %d kb/s.\n",
	192	st->codec->sample_rate, st->codec->bit_rate);
	193	return -1;
	194	}
	195	c->frame_bit_len = st->codec->bit_rate*size/st->codec->sample_rate;
c3f9ebf7	196	avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
616e899c	197
7b966566 JR	198	/* put first 12 bytes of COMM chunk in extradata */
	199	if (!(st->codec->extradata = av_malloc(12 + FF_INPUT_BUFFER_PADDING_SIZE)))
	200	return AVERROR(ENOMEM);
	201	st->codec->extradata_size = 12;
	202	memcpy(st->codec->extradata, comm_chunk, 12);
	203
616e899c VS	204	return 0;
	205	}
	206
	207	static int vqf_read_packet(AVFormatContext s, AVPacket pkt)
	208	{
	209	VqfContext *c = s->priv_data;
	210	int ret;
	211	int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;
	212
a2704c97	213	pkt->pos = avio_tell(s->pb);
616e899c VS	214	pkt->stream_index = 0;
	215
	216	if (av_new_packet(pkt, size+2) < 0)
	217	return AVERROR(EIO);
	218
	219	pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip
	220	pkt->data[1] = c->last_frame_bits;
b7effd4e	221	ret = avio_read(s->pb, pkt->data+2, size);
616e899c VS	222
	223	if (ret<=0) {
	224	av_free_packet(pkt);
	225	return AVERROR(EIO);
	226	}
	227
	228	c->last_frame_bits = pkt->data[size+1];
	229	c->remaining_bits = (size << 3) - c->frame_bit_len + c->remaining_bits;
	230
	231	return size+2;
	232	}
	233
	234	static int vqf_read_seek(AVFormatContext *s,
	235	int stream_index, int64_t timestamp, int flags)
	236	{
	237	VqfContext *c = s->priv_data;
	238	AVStream *st;
	239	int ret;
	240	int64_t pos;
	241
	242	st = s->streams[stream_index];
	243	pos = av_rescale_rnd(timestamp * st->codec->bit_rate,
	244	st->time_base.num,
	245	st->time_base.den * (int64_t)c->frame_bit_len,
	246	(flags & AVSEEK_FLAG_BACKWARD) ?
	247	AV_ROUND_DOWN : AV_ROUND_UP);
	248	pos *= c->frame_bit_len;
	249
	250	st->cur_dts = av_rescale(pos, st->time_base.den,
	251	st->codec->bit_rate * (int64_t)st->time_base.num);
	252
6b4aa5da	253	if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0)
616e899c VS	254	return ret;
	255
	256	c->remaining_bits = -7 - ((pos-7)&7);
	257	return 0;
	258	}
	259
c6610a21	260	AVInputFormat ff_vqf_demuxer = {
dfc2c4d9 AK	261	.name = "vqf",
	262	.long_name = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"),
	263	.priv_data_size = sizeof(VqfContext),
	264	.read_probe = vqf_probe,
	265	.read_header = vqf_read_header,
	266	.read_packet = vqf_read_packet,
	267	.read_seek = vqf_read_seek,
f86209b4	268	.extensions = "vqf,vql,vqe",
616e899c	269	};