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

/*
 * Yamaha SMAF format
 * Copyright (c) 2005 Vidar Madsen
 *
 * 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/channel_layout.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "pcm.h"
#include "rawenc.h"
#include "riff.h"

typedef struct {
    int64_t atrpos, atsqpos, awapos;
    int64_t data_end;
    int stereo;
} MMFContext;

static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };

static int mmf_rate(int code)
{
    if ((code < 0) || (code > 4))
        return -1;
    return mmf_rates[code];
}

#if CONFIG_MMF_MUXER
static int mmf_rate_code(int rate)
{
    int i;
    for (i = 0; i < 5; i++)
        if (mmf_rates[i] == rate)
            return i;
    return -1;
}

/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
static void end_tag_be(AVIOContext *pb, int64_t start)
{
    int64_t pos;

    pos = avio_tell(pb);
    avio_seek(pb, start - 4, SEEK_SET);
    avio_wb32(pb, (uint32_t)(pos - start));
    avio_seek(pb, pos, SEEK_SET);
}

static int mmf_write_header(AVFormatContext *s)
{
    MMFContext *mmf = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t pos;
    int rate;
    const char *version = s->flags & AVFMT_FLAG_BITEXACT ?
                          "VN:Lavf," :
                          "VN:"LIBAVFORMAT_IDENT",";

    rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
    if (rate < 0) {
        av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
               s->streams[0]->codec->sample_rate);
        return AVERROR(EINVAL);
    }

    mmf->stereo = s->streams[0]->codec->channels > 1;
    if (mmf->stereo &&
        s->streams[0]->codec->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
        av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
               "add '-strict %d' if you want to use it.\n",
               FF_COMPLIANCE_EXPERIMENTAL);
        return AVERROR(EINVAL);
    }

    ffio_wfourcc(pb, "MMMD");
    avio_wb32(pb, 0);
    pos = ff_start_tag(pb, "CNTI");
    avio_w8(pb, 0); /* class */
    avio_w8(pb, 1); /* type */
    avio_w8(pb, 1); /* code type */
    avio_w8(pb, 0); /* status */
    avio_w8(pb, 0); /* counts */
    end_tag_be(pb, pos);

    pos = ff_start_tag(pb, "OPDA");
    avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
    end_tag_be(pb, pos);

    avio_write(pb, "ATR\x00", 4);
    avio_wb32(pb, 0);
    mmf->atrpos = avio_tell(pb);
    avio_w8(pb, 0); /* format type */
    avio_w8(pb, 0); /* sequence type */
    avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
    avio_w8(pb, 0); /* wave base bit */
    avio_w8(pb, 2); /* time base d */
    avio_w8(pb, 2); /* time base g */

    ffio_wfourcc(pb, "Atsq");
    avio_wb32(pb, 16);
    mmf->atsqpos = avio_tell(pb);
    /* Will be filled on close */
    avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);

    mmf->awapos = ff_start_tag(pb, "Awa\x01");

    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);

    avio_flush(pb);

    return 0;
}

/* Write a variable-length symbol */
static void put_varlength(AVIOContext *pb, int val)
{
    if (val < 128)
        avio_w8(pb, val);
    else {
        val -= 128;
        avio_w8(pb, 0x80 | val >> 7);
        avio_w8(pb, 0x7f & val);
    }
}

static int mmf_write_trailer(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    MMFContext *mmf = s->priv_data;
    int64_t pos, size;
    int gatetime;

    if (s->pb->seekable) {
        /* Fill in length fields */
        end_tag_be(pb, mmf->awapos);
        end_tag_be(pb, mmf->atrpos);
        end_tag_be(pb, 8);

        pos  = avio_tell(pb);
        size = pos - mmf->awapos;

        /* Fill Atsq chunk */
        avio_seek(pb, mmf->atsqpos, SEEK_SET);

        /* "play wav" */
        avio_w8(pb, 0); /* start time */
        avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
        gatetime = size * 500 / s->streams[0]->codec->sample_rate;
        put_varlength(pb, gatetime); /* duration */

        /* "nop" */
        put_varlength(pb, gatetime); /* start time */
        avio_write(pb, "\xff\x00", 2); /* nop */

        /* "end of sequence" */
        avio_write(pb, "\x00\x00\x00\x00", 4);

        avio_seek(pb, pos, SEEK_SET);

        avio_flush(pb);
    }
    return 0;
}
#endif /* CONFIG_MMF_MUXER */

static int mmf_probe(AVProbeData *p)
{
    /* check file header */
    if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
        p->buf[2] == 'M' && p->buf[3] == 'D' &&
        p->buf[8] == 'C' && p->buf[9] == 'N' &&
        p->buf[10] == 'T' && p->buf[11] == 'I')
        return AVPROBE_SCORE_MAX;
    else
        return 0;
}

/* mmf input */
static int mmf_read_header(AVFormatContext *s)
{
    MMFContext *mmf = s->priv_data;
    unsigned int tag;
    AVIOContext *pb = s->pb;
    AVStream *st;
    int64_t size;
    int rate, params;

    tag = avio_rl32(pb);
    if (tag != MKTAG('M', 'M', 'M', 'D'))
        return AVERROR_INVALIDDATA;
    avio_skip(pb, 4); /* file_size */

    /* Skip some unused chunks that may or may not be present */
    for (;; avio_skip(pb, size)) {
        tag  = avio_rl32(pb);
        size = avio_rb32(pb);
        if (tag == MKTAG('C', 'N', 'T', 'I'))
            continue;
        if (tag == MKTAG('O', 'P', 'D', 'A'))
            continue;
        break;
    }

    /* Tag = "ATRx", where "x" = track number */
    if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
        av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
        return AVERROR_PATCHWELCOME;
    }
    if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
        av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
        return AVERROR_PATCHWELCOME;
    }

    avio_r8(pb); /* format type */
    avio_r8(pb); /* sequence type */
    params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
    rate   = mmf_rate(params & 0x0f);
    if (rate < 0) {
        av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
        return AVERROR_INVALIDDATA;
    }
    avio_r8(pb); /* wave base bit */
    avio_r8(pb); /* time base d */
    avio_r8(pb); /* time base g */

    /* Skip some unused chunks that may or may not be present */
    for (;; avio_skip(pb, size)) {
        tag  = avio_rl32(pb);
        size = avio_rb32(pb);
        if (tag == MKTAG('A', 't', 's', 'q'))
            continue;
        if (tag == MKTAG('A', 's', 'p', 'I'))
            continue;
        break;
    }

    /* Make sure it's followed by an Awa chunk, aka wave data */
    if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
        av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
        return AVERROR_INVALIDDATA;
    }
    mmf->data_end = avio_tell(pb) + size;

    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_ADPCM_YAMAHA;
    st->codec->sample_rate           = rate;
    st->codec->channels              = (params >> 7) + 1;
    st->codec->channel_layout        = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
    st->codec->bits_per_coded_sample = 4;
    st->codec->bit_rate              = st->codec->sample_rate *
                                       st->codec->bits_per_coded_sample;

    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);

    return 0;
}

#define MAX_SIZE 4096

static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    MMFContext *mmf = s->priv_data;
    int64_t left, size;
    int ret;

    left = mmf->data_end - avio_tell(s->pb);
    size = FFMIN(left, MAX_SIZE);
    if (avio_feof(s->pb) || size <= 0)
        return AVERROR_EOF;

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

    pkt->stream_index = 0;

    return ret;
}

#if CONFIG_MMF_DEMUXER
AVInputFormat ff_mmf_demuxer = {
    .name           = "mmf",
    .long_name      = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
    .priv_data_size = sizeof(MMFContext),
    .read_probe     = mmf_probe,
    .read_header    = mmf_read_header,
    .read_packet    = mmf_read_packet,
    .flags          = AVFMT_GENERIC_INDEX,
};
#endif

#if CONFIG_MMF_MUXER
AVOutputFormat ff_mmf_muxer = {
    .name           = "mmf",
    .long_name      = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
    .mime_type      = "application/vnd.smaf",
    .extensions     = "mmf",
    .priv_data_size = sizeof(MMFContext),
    .audio_codec    = AV_CODEC_ID_ADPCM_YAMAHA,
    .video_codec    = AV_CODEC_ID_NONE,
    .write_header   = mmf_write_header,
    .write_packet   = ff_raw_write_packet,
    .write_trailer  = mmf_write_trailer,
};
#endif
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Yamaha SMAF format
	3	* Copyright (c) 2005 Vidar Madsen
	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/channel_layout.h"
	23	#include "avformat.h"
	24	#include "avio_internal.h"
	25	#include "internal.h"
	26	#include "pcm.h"
	27	#include "rawenc.h"
	28	#include "riff.h"
	29
	30	typedef struct {
	31	int64_t atrpos, atsqpos, awapos;
	32	int64_t data_end;
	33	int stereo;
	34	} MMFContext;
	35
	36	static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
	37
	38	static int mmf_rate(int code)
	39	{
	40	if ((code < 0) \|\| (code > 4))
	41	return -1;
	42	return mmf_rates[code];
	43	}
	44
	45	#if CONFIG_MMF_MUXER
	46	static int mmf_rate_code(int rate)
	47	{
	48	int i;
	49	for (i = 0; i < 5; i++)
	50	if (mmf_rates[i] == rate)
	51	return i;
	52	return -1;
	53	}
	54
	55	/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
	56	static void end_tag_be(AVIOContext *pb, int64_t start)
	57	{
	58	int64_t pos;
	59
	60	pos = avio_tell(pb);
	61	avio_seek(pb, start - 4, SEEK_SET);
	62	avio_wb32(pb, (uint32_t)(pos - start));
	63	avio_seek(pb, pos, SEEK_SET);
	64	}
65
66	static int mmf_write_header(AVFormatContext *s)
67	{
68	MMFContext *mmf = s->priv_data;
69	AVIOContext *pb = s->pb;
70	int64_t pos;
71	int rate;
72	const char *version = s->flags & AVFMT_FLAG_BITEXACT ?
73	"VN:Lavf," :
74	"VN:"LIBAVFORMAT_IDENT",";
75
76	rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
77	if (rate < 0) {
78	av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
79	s->streams[0]->codec->sample_rate);
80	return AVERROR(EINVAL);
81	}
82
83	mmf->stereo = s->streams[0]->codec->channels > 1;
84	if (mmf->stereo &&
85	s->streams[0]->codec->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
86	av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
87	"add '-strict %d' if you want to use it.\n",
88	FF_COMPLIANCE_EXPERIMENTAL);
89	return AVERROR(EINVAL);
90	}
91
92	ffio_wfourcc(pb, "MMMD");
93	avio_wb32(pb, 0);
94	pos = ff_start_tag(pb, "CNTI");
95	avio_w8(pb, 0); /* class */
96	avio_w8(pb, 1); /* type */
97	avio_w8(pb, 1); /* code type */
98	avio_w8(pb, 0); /* status */
99	avio_w8(pb, 0); /* counts */
100	end_tag_be(pb, pos);
101
102	pos = ff_start_tag(pb, "OPDA");
103	avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
104	end_tag_be(pb, pos);
105
106	avio_write(pb, "ATR\x00", 4);
107	avio_wb32(pb, 0);
108	mmf->atrpos = avio_tell(pb);
109	avio_w8(pb, 0); /* format type */
110	avio_w8(pb, 0); /* sequence type */
111	avio_w8(pb, (mmf->stereo << 7) \| (1 << 4) \| rate); /* (channel << 7) \| (format << 4) \| rate */
112	avio_w8(pb, 0); /* wave base bit */
113	avio_w8(pb, 2); /* time base d */
114	avio_w8(pb, 2); /* time base g */
115
116	ffio_wfourcc(pb, "Atsq");
117	avio_wb32(pb, 16);
118	mmf->atsqpos = avio_tell(pb);
119	/* Will be filled on close */
120	avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
121
122	mmf->awapos = ff_start_tag(pb, "Awa\x01");
123
124	avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
125
126	avio_flush(pb);
127
128	return 0;
129	}
130
131	/* Write a variable-length symbol */
132	static void put_varlength(AVIOContext *pb, int val)
133	{
134	if (val < 128)
135	avio_w8(pb, val);
136	else {
137	val -= 128;
138	avio_w8(pb, 0x80 \| val >> 7);
139	avio_w8(pb, 0x7f & val);
140	}
141	}
142
143	static int mmf_write_trailer(AVFormatContext *s)
144	{
145	AVIOContext *pb = s->pb;
146	MMFContext *mmf = s->priv_data;
147	int64_t pos, size;
148	int gatetime;
149
150	if (s->pb->seekable) {
151	/* Fill in length fields */
152	end_tag_be(pb, mmf->awapos);
153	end_tag_be(pb, mmf->atrpos);
154	end_tag_be(pb, 8);
155
156	pos = avio_tell(pb);
157	size = pos - mmf->awapos;
158
159	/* Fill Atsq chunk */
160	avio_seek(pb, mmf->atsqpos, SEEK_SET);
161
162	/* "play wav" */
163	avio_w8(pb, 0); /* start time */
164	avio_w8(pb, (mmf->stereo << 6) \| 1); /* (channel << 6) \| wavenum */
165	gatetime = size * 500 / s->streams[0]->codec->sample_rate;
166	put_varlength(pb, gatetime); /* duration */
167
168	/* "nop" */
169	put_varlength(pb, gatetime); /* start time */
170	avio_write(pb, "\xff\x00", 2); /* nop */
171
172	/* "end of sequence" */
173	avio_write(pb, "\x00\x00\x00\x00", 4);
174
175	avio_seek(pb, pos, SEEK_SET);
176
177	avio_flush(pb);
178	}
179	return 0;
180	}
181	#endif /* CONFIG_MMF_MUXER */
182
183	static int mmf_probe(AVProbeData *p)
184	{
185	/* check file header */
186	if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
187	p->buf[2] == 'M' && p->buf[3] == 'D' &&
188	p->buf[8] == 'C' && p->buf[9] == 'N' &&
189	p->buf[10] == 'T' && p->buf[11] == 'I')
190	return AVPROBE_SCORE_MAX;
191	else
192	return 0;
193	}
194
195	/* mmf input */
196	static int mmf_read_header(AVFormatContext *s)
197	{
198	MMFContext *mmf = s->priv_data;
199	unsigned int tag;
200	AVIOContext *pb = s->pb;
201	AVStream *st;
202	int64_t size;
203	int rate, params;
204
205	tag = avio_rl32(pb);
206	if (tag != MKTAG('M', 'M', 'M', 'D'))
207	return AVERROR_INVALIDDATA;
208	avio_skip(pb, 4); /* file_size */
209
210	/* Skip some unused chunks that may or may not be present */
211	for (;; avio_skip(pb, size)) {
212	tag = avio_rl32(pb);
213	size = avio_rb32(pb);
214	if (tag == MKTAG('C', 'N', 'T', 'I'))
215	continue;
216	if (tag == MKTAG('O', 'P', 'D', 'A'))
217	continue;
218	break;
219	}
220
221	/* Tag = "ATRx", where "x" = track number */
222	if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
223	av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
224	return AVERROR_PATCHWELCOME;
225	}
226	if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
227	av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
228	return AVERROR_PATCHWELCOME;
229	}
230
231	avio_r8(pb); /* format type */
232	avio_r8(pb); /* sequence type */
233	params = avio_r8(pb); /* (channel << 7) \| (format << 4) \| rate */
234	rate = mmf_rate(params & 0x0f);
235	if (rate < 0) {
236	av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
237	return AVERROR_INVALIDDATA;
238	}
239	avio_r8(pb); /* wave base bit */
240	avio_r8(pb); /* time base d */
241	avio_r8(pb); /* time base g */
242
243	/* Skip some unused chunks that may or may not be present */
244	for (;; avio_skip(pb, size)) {
245	tag = avio_rl32(pb);
246	size = avio_rb32(pb);
247	if (tag == MKTAG('A', 't', 's', 'q'))
248	continue;
249	if (tag == MKTAG('A', 's', 'p', 'I'))
250	continue;
251	break;
252	}
253
254	/* Make sure it's followed by an Awa chunk, aka wave data */
255	if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
256	av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
257	return AVERROR_INVALIDDATA;
258	}
259	mmf->data_end = avio_tell(pb) + size;
260
261	st = avformat_new_stream(s, NULL);
262	if (!st)
263	return AVERROR(ENOMEM);
264
265	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
266	st->codec->codec_id = AV_CODEC_ID_ADPCM_YAMAHA;
267	st->codec->sample_rate = rate;
268	st->codec->channels = (params >> 7) + 1;
269	st->codec->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
270	st->codec->bits_per_coded_sample = 4;
271	st->codec->bit_rate = st->codec->sample_rate *
272	st->codec->bits_per_coded_sample;
273
274	avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
275
276	return 0;
277	}
278
279	#define MAX_SIZE 4096
280
281	static int mmf_read_packet(AVFormatContext s, AVPacket pkt)
282	{
283	MMFContext *mmf = s->priv_data;
284	int64_t left, size;
285	int ret;
286
287	left = mmf->data_end - avio_tell(s->pb);
288	size = FFMIN(left, MAX_SIZE);
289	if (avio_feof(s->pb) \|\| size <= 0)
290	return AVERROR_EOF;
291
292	ret = av_get_packet(s->pb, pkt, size);
293	if (ret < 0)
294	return ret;
295
296	pkt->stream_index = 0;
297
298	return ret;
299	}
300
301	#if CONFIG_MMF_DEMUXER
302	AVInputFormat ff_mmf_demuxer = {
303	.name = "mmf",
304	.long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
305	.priv_data_size = sizeof(MMFContext),
306	.read_probe = mmf_probe,
307	.read_header = mmf_read_header,
308	.read_packet = mmf_read_packet,
309	.flags = AVFMT_GENERIC_INDEX,
310	};
311	#endif
312
313	#if CONFIG_MMF_MUXER
314	AVOutputFormat ff_mmf_muxer = {
315	.name = "mmf",
316	.long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
317	.mime_type = "application/vnd.smaf",
318	.extensions = "mmf",
319	.priv_data_size = sizeof(MMFContext),
320	.audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
321	.video_codec = AV_CODEC_ID_NONE,
322	.write_header = mmf_write_header,
323	.write_packet = ff_raw_write_packet,
324	.write_trailer = mmf_write_trailer,
325	};
326	#endif