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

/*
 * VQF demuxer
 * Copyright (c) 2009 Vitor Sessak
 *
 * 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 "avformat.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "riff.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;

    if (AV_RL32(probe_packet->buf + 12) > (1<<27))
        return AVPROBE_SCORE_EXTENSION/2;

    return AVPROBE_SCORE_EXTENSION;
}

static void add_metadata(AVFormatContext *s, uint32_t tag,
                         unsigned int tag_len, unsigned int remaining)
{
    int len = FFMIN(tag_len, remaining);
    char *buf, key[5] = {0};

    if (len == UINT_MAX)
        return;

    buf = av_malloc(len+1);
    if (!buf)
        return;
    avio_read(s->pb, buf, len);
    buf[len] = 0;
    AV_WL32(key, tag);
    av_dict_set(&s->metadata, key, buf, AV_DICT_DONT_STRDUP_VAL);
}

static const AVMetadataConv vqf_metadata_conv[] = {
    { "(c) ", "copyright" },
    { "ARNG", "arranger"  },
    { "AUTH", "author"    },
    { "BAND", "band"      },
    { "CDCT", "conductor" },
    { "COMT", "comment"   },
    { "FILE", "filename"  },
    { "GENR", "genre"     },
    { "LABL", "publisher" },
    { "MUSC", "composer"  },
    { "NAME", "title"     },
    { "NOTE", "note"      },
    { "PROD", "producer"  },
    { "PRSN", "personnel" },
    { "REMX", "remixer"   },
    { "SING", "singer"    },
    { "TRCK", "track"     },
    { "WORD", "words"     },
    { 0 },
};

static int vqf_read_header(AVFormatContext *s)
{
    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   = AV_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);

            if (st->codec->channels <= 0) {
                av_log(s, AV_LOG_ERROR, "Invalid number of channels\n");
                return AVERROR_INVALIDDATA;
            }

            st->codec->bit_rate              = read_bitrate*1000;
            break;
        case MKTAG('D','S','I','Z'): // size of compressed data
        {
            av_dict_set_int(&s->metadata, "size", avio_rb32(s->pb), 0);
        }
            break;
        case MKTAG('Y','E','A','R'): // recording date
        case MKTAG('E','N','C','D'): // compression date
        case MKTAG('E','X','T','R'): // reserved
        case MKTAG('_','Y','M','H'): // reserved
        case MKTAG('_','N','T','T'): // reserved
        case MKTAG('_','I','D','3'): // reserved for ID3 tags
            avio_skip(s->pb, FFMIN(len, header_size));
            break;
        default:
            add_metadata(s, chunk_tag, len, header_size);
            break;
        }

        header_size -= len;

    } while (header_size >= 0 && !avio_feof(s->pb));

    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:
        if (rate_flag < 8 || rate_flag > 44) {
            av_log(s, AV_LOG_ERROR, "Invalid rate flag %d\n", rate_flag);
            return AVERROR_INVALIDDATA;
        }
        st->codec->sample_rate = rate_flag*1000;
        break;
    }

    if (read_bitrate / st->codec->channels <  8 ||
        read_bitrate / st->codec->channels > 48) {
        av_log(s, AV_LOG_ERROR, "Invalid bitrate per channel %d\n",
               read_bitrate / st->codec->channels);
        return AVERROR_INVALIDDATA;
    }

    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, size, st->codec->sample_rate);

    /* put first 12 bytes of COMM chunk in extradata */
    if (ff_alloc_extradata(st->codec, 12))
        return AVERROR(ENOMEM);
    memcpy(st->codec->extradata, comm_chunk, 12);

    ff_metadata_conv_ctx(s, NULL, vqf_metadata_conv);

    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;

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

    pkt->pos          = avio_tell(s->pb);
    pkt->stream_index = 0;
    pkt->duration     = 1;

    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 != size) {
        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
2ba45a60 DM	1	/*
	2	* VQF demuxer
	3	* Copyright (c) 2009 Vitor Sessak
	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 "avformat.h"
	23	#include "internal.h"
	24	#include "libavutil/intreadwrite.h"
	25	#include "libavutil/dict.h"
	26	#include "libavutil/mathematics.h"
	27	#include "riff.h"
	28
	29	typedef struct VqfContext {
	30	int frame_bit_len;
	31	uint8_t last_frame_bits;
	32	int remaining_bits;
	33	} VqfContext;
	34
	35	static int vqf_probe(AVProbeData *probe_packet)
	36	{
	37	if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N'))
	38	return 0;
	39
	40	if (!memcmp(probe_packet->buf + 4, "97012000", 8))
	41	return AVPROBE_SCORE_MAX;
	42
	43	if (!memcmp(probe_packet->buf + 4, "00052200", 8))
	44	return AVPROBE_SCORE_MAX;
	45
	46	if (AV_RL32(probe_packet->buf + 12) > (1<<27))
	47	return AVPROBE_SCORE_EXTENSION/2;
	48
	49	return AVPROBE_SCORE_EXTENSION;
	50	}
	51
	52	static void add_metadata(AVFormatContext *s, uint32_t tag,
	53	unsigned int tag_len, unsigned int remaining)
	54	{
	55	int len = FFMIN(tag_len, remaining);
	56	char *buf, key[5] = {0};
	57
	58	if (len == UINT_MAX)
	59	return;
	60
	61	buf = av_malloc(len+1);
	62	if (!buf)
	63	return;
	64	avio_read(s->pb, buf, len);
65	buf[len] = 0;
66	AV_WL32(key, tag);
67	av_dict_set(&s->metadata, key, buf, AV_DICT_DONT_STRDUP_VAL);
68	}
69
70	static const AVMetadataConv vqf_metadata_conv[] = {
71	{ "(c) ", "copyright" },
72	{ "ARNG", "arranger" },
73	{ "AUTH", "author" },
74	{ "BAND", "band" },
75	{ "CDCT", "conductor" },
76	{ "COMT", "comment" },
77	{ "FILE", "filename" },
78	{ "GENR", "genre" },
79	{ "LABL", "publisher" },
80	{ "MUSC", "composer" },
81	{ "NAME", "title" },
82	{ "NOTE", "note" },
83	{ "PROD", "producer" },
84	{ "PRSN", "personnel" },
85	{ "REMX", "remixer" },
86	{ "SING", "singer" },
87	{ "TRCK", "track" },
88	{ "WORD", "words" },
89	{ 0 },
90	};
91
92	static int vqf_read_header(AVFormatContext *s)
93	{
94	VqfContext *c = s->priv_data;
95	AVStream *st = avformat_new_stream(s, NULL);
96	int chunk_tag;
97	int rate_flag = -1;
98	int header_size;
99	int read_bitrate = 0;
100	int size;
101	uint8_t comm_chunk[12];
102
103	if (!st)
104	return AVERROR(ENOMEM);
105
106	avio_skip(s->pb, 12);
107
108	header_size = avio_rb32(s->pb);
109
110	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
111	st->codec->codec_id = AV_CODEC_ID_TWINVQ;
112	st->start_time = 0;
113
114	do {
115	int len;
116	chunk_tag = avio_rl32(s->pb);
117
118	if (chunk_tag == MKTAG('D','A','T','A'))
119	break;
120
121	len = avio_rb32(s->pb);
122
123	if ((unsigned) len > INT_MAX/2) {
124	av_log(s, AV_LOG_ERROR, "Malformed header\n");
125	return -1;
126	}
127
128	header_size -= 8;
129
130	switch(chunk_tag){
131	case MKTAG('C','O','M','M'):
132	avio_read(s->pb, comm_chunk, 12);
133	st->codec->channels = AV_RB32(comm_chunk ) + 1;
134	read_bitrate = AV_RB32(comm_chunk + 4);
135	rate_flag = AV_RB32(comm_chunk + 8);
136	avio_skip(s->pb, len-12);
137
138	if (st->codec->channels <= 0) {
139	av_log(s, AV_LOG_ERROR, "Invalid number of channels\n");
140	return AVERROR_INVALIDDATA;
141	}
142
143	st->codec->bit_rate = read_bitrate*1000;
144	break;
145	case MKTAG('D','S','I','Z'): // size of compressed data
146	{
147	av_dict_set_int(&s->metadata, "size", avio_rb32(s->pb), 0);
148	}
149	break;
150	case MKTAG('Y','E','A','R'): // recording date
151	case MKTAG('E','N','C','D'): // compression date
152	case MKTAG('E','X','T','R'): // reserved
153	case MKTAG('_','Y','M','H'): // reserved
154	case MKTAG('_','N','T','T'): // reserved
155	case MKTAG('_','I','D','3'): // reserved for ID3 tags
156	avio_skip(s->pb, FFMIN(len, header_size));
157	break;
158	default:
159	add_metadata(s, chunk_tag, len, header_size);
160	break;
161	}
162
163	header_size -= len;
164
165	} while (header_size >= 0 && !avio_feof(s->pb));
166
167	switch (rate_flag) {
168	case -1:
169	av_log(s, AV_LOG_ERROR, "COMM tag not found!\n");
170	return -1;
171	case 44:
172	st->codec->sample_rate = 44100;
173	break;
174	case 22:
175	st->codec->sample_rate = 22050;
176	break;
177	case 11:
178	st->codec->sample_rate = 11025;
179	break;
180	default:
181	if (rate_flag < 8 \|\| rate_flag > 44) {
182	av_log(s, AV_LOG_ERROR, "Invalid rate flag %d\n", rate_flag);
183	return AVERROR_INVALIDDATA;
184	}
185	st->codec->sample_rate = rate_flag*1000;
186	break;
187	}
188
189	if (read_bitrate / st->codec->channels < 8 \|\|
190	read_bitrate / st->codec->channels > 48) {
191	av_log(s, AV_LOG_ERROR, "Invalid bitrate per channel %d\n",
192	read_bitrate / st->codec->channels);
193	return AVERROR_INVALIDDATA;
194	}
195
196	switch (((st->codec->sample_rate/1000) << 8) +
197	read_bitrate/st->codec->channels) {
198	case (11<<8) + 8 :
199	case (8 <<8) + 8 :
200	case (11<<8) + 10:
201	case (22<<8) + 32:
202	size = 512;
203	break;
204	case (16<<8) + 16:
205	case (22<<8) + 20:
206	case (22<<8) + 24:
207	size = 1024;
208	break;
209	case (44<<8) + 40:
210	case (44<<8) + 48:
211	size = 2048;
212	break;
213	default:
214	av_log(s, AV_LOG_ERROR, "Mode not suported: %d Hz, %d kb/s.\n",
215	st->codec->sample_rate, st->codec->bit_rate);
216	return -1;
217	}
218	c->frame_bit_len = st->codec->bit_rate*size/st->codec->sample_rate;
219	avpriv_set_pts_info(st, 64, size, st->codec->sample_rate);
220
221	/* put first 12 bytes of COMM chunk in extradata */
222	if (ff_alloc_extradata(st->codec, 12))
223	return AVERROR(ENOMEM);
224	memcpy(st->codec->extradata, comm_chunk, 12);
225
226	ff_metadata_conv_ctx(s, NULL, vqf_metadata_conv);
227
228	return 0;
229	}
230
231	static int vqf_read_packet(AVFormatContext s, AVPacket pkt)
232	{
233	VqfContext *c = s->priv_data;
234	int ret;
235	int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;
236
237	if (av_new_packet(pkt, size+2) < 0)
238	return AVERROR(EIO);
239
240	pkt->pos = avio_tell(s->pb);
241	pkt->stream_index = 0;
242	pkt->duration = 1;
243
244	pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip
245	pkt->data[1] = c->last_frame_bits;
246	ret = avio_read(s->pb, pkt->data+2, size);
247
248	if (ret != size) {
249	av_free_packet(pkt);
250	return AVERROR(EIO);
251	}
252
253	c->last_frame_bits = pkt->data[size+1];
254	c->remaining_bits = (size << 3) - c->frame_bit_len + c->remaining_bits;
255
256	return size+2;
257	}
258
259	static int vqf_read_seek(AVFormatContext *s,
260	int stream_index, int64_t timestamp, int flags)
261	{
262	VqfContext *c = s->priv_data;
263	AVStream *st;
264	int ret;
265	int64_t pos;
266
267	st = s->streams[stream_index];
268	pos = av_rescale_rnd(timestamp * st->codec->bit_rate,
269	st->time_base.num,
270	st->time_base.den * (int64_t)c->frame_bit_len,
271	(flags & AVSEEK_FLAG_BACKWARD) ?
272	AV_ROUND_DOWN : AV_ROUND_UP);
273	pos *= c->frame_bit_len;
274
275	st->cur_dts = av_rescale(pos, st->time_base.den,
276	st->codec->bit_rate * (int64_t)st->time_base.num);
277
278	if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0)
279	return ret;
280
281	c->remaining_bits = -7 - ((pos-7)&7);
282	return 0;
283	}
284
285	AVInputFormat ff_vqf_demuxer = {
286	.name = "vqf",
287	.long_name = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"),
288	.priv_data_size = sizeof(VqfContext),
289	.read_probe = vqf_probe,
290	.read_header = vqf_read_header,
291	.read_packet = vqf_read_packet,
292	.read_seek = vqf_read_seek,
293	.extensions = "vqf,vql,vqe",
294	};