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1 de6d9b64 Fabrice Bellard
/* 
2
 * WAV encoder and decoder
3 e095026a Fabrice Bellard
 * Copyright (c) 2001, 2002 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 19720f15 Fabrice Bellard
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9 de6d9b64 Fabrice Bellard
 *
10 19720f15 Fabrice Bellard
 * This library is distributed in the hope that it will be useful,
11 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
14 de6d9b64 Fabrice Bellard
 *
15 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18 de6d9b64 Fabrice Bellard
 */
19
#include "avformat.h"
20
#include "avi.h"
21
22 e8c00089 Zdenek Kabelac
const CodecTag codec_wav_tags[] = {
23 46a3d068 Fabrice Bellard
    { CODEC_ID_MP2, 0x50 },
24 80783dc2 Fabrice Bellard
    { CODEC_ID_MP3, 0x55 },
25 46a3d068 Fabrice Bellard
    { CODEC_ID_AC3, 0x2000 },
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    { CODEC_ID_PCM_S16LE, 0x01 },
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    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
28 b461b3bc Reimar Döffinger
    { CODEC_ID_PCM_S24LE, 0x01 },
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    { CODEC_ID_PCM_S32LE, 0x01 },
30 46a3d068 Fabrice Bellard
    { CODEC_ID_PCM_ALAW, 0x06 },
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    { CODEC_ID_PCM_MULAW, 0x07 },
32 0147f198 François Revol
    { CODEC_ID_ADPCM_MS, 0x02 },
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    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
34 694eaead Vidar Madsen
    { CODEC_ID_ADPCM_YAMAHA, 0x20 },
35 e5966052 Roman Shaposhnik
    { CODEC_ID_ADPCM_G726, 0x45 },
36 048446bf Mike Melanson
    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
37
    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
38 e095026a Fabrice Bellard
    { CODEC_ID_WMAV1, 0x160 },
39
    { CODEC_ID_WMAV2, 0x161 },
40 ca377212 Måns Rullgård
    { CODEC_ID_AAC, 0x706d },
41 2926db54 Michael Niedermayer
    { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
42 7251dfaf Alex Beregszaszi
    { CODEC_ID_SONIC, 0x2048 },
43
    { CODEC_ID_SONIC_LS, 0x2048 },
44 b3bfb299 Mike Melanson
    { CODEC_ID_ADPCM_CT, 0x200 },
45 a50ff23c Alex Beregszaszi
    { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
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    { 0, 0 },
47
};
48
49 a9e35095 Diego Biurrun
#ifdef CONFIG_MUXERS
50 46a3d068 Fabrice Bellard
/* WAVEFORMATEX header */
51 afc25d93 Philip Gladstone
/* returns the size or -1 on error */
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int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
53
{
54 bd5a6020 Michael Niedermayer
    int bps, blkalign, bytespersec;
55 afc25d93 Philip Gladstone
    int hdrsize = 18;
56 46a3d068 Fabrice Bellard
57 bd5a6020 Michael Niedermayer
    if(!enc->codec_tag)
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       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
59
    if(!enc->codec_tag)
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        return -1;
61 bd5a6020 Michael Niedermayer
62
    put_le16(pb, enc->codec_tag);
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    put_le16(pb, enc->channels);
64
    put_le32(pb, enc->sample_rate);
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    if (enc->codec_id == CODEC_ID_PCM_U8 ||
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        enc->codec_id == CODEC_ID_PCM_ALAW ||
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        enc->codec_id == CODEC_ID_PCM_MULAW) {
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        bps = 8;
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    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
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        bps = 0;
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    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS || enc->codec_id == CODEC_ID_ADPCM_G726 || enc->codec_id == CODEC_ID_ADPCM_YAMAHA) { //
72 889c5224 François Revol
        bps = 4;
73 b461b3bc Reimar Döffinger
    } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
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        bps = 24;
75
    } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
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        bps = 32;
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    } else {
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        bps = 16;
79
    }
80
    
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    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
82 359fa0fe Michael Niedermayer
        blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
83 4b1f4f23 Juanjo
        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
84 58d2a150 Calcium
    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
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        blkalign = 1;
86 0147f198 François Revol
    } else if (enc->block_align != 0) { /* specified by the codec */
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        blkalign = enc->block_align;
88 4b1f4f23 Juanjo
    } else
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        blkalign = enc->channels*bps >> 3;
90
    if (enc->codec_id == CODEC_ID_PCM_U8 ||
91 b461b3bc Reimar Döffinger
        enc->codec_id == CODEC_ID_PCM_S24LE ||
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        enc->codec_id == CODEC_ID_PCM_S32LE ||
93 86bec9a1 Juanjo
        enc->codec_id == CODEC_ID_PCM_S16LE) {
94
        bytespersec = enc->sample_rate * blkalign;
95
    } else {
96
        bytespersec = enc->bit_rate / 8;
97
    }
98
    put_le32(pb, bytespersec); /* bytes per second */
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    put_le16(pb, blkalign); /* block align */
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    put_le16(pb, bps); /* bits per sample */
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    if (enc->codec_id == CODEC_ID_MP3) {
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        put_le16(pb, 12); /* wav_extra_size */
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        hdrsize += 12;
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        put_le16(pb, 1); /* wID */
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        put_le32(pb, 2); /* fdwFlags */
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        put_le16(pb, 1152); /* nBlockSize */
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        put_le16(pb, 1); /* nFramesPerBlock */
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        put_le16(pb, 1393); /* nCodecDelay */
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    } else if (enc->codec_id == CODEC_ID_MP2) {
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        put_le16(pb, 22); /* wav_extra_size */
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        hdrsize += 22;
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        put_le16(pb, 2);  /* fwHeadLayer */
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        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
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        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
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        put_le16(pb, 0);  /* fwHeadModeExt */
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        put_le16(pb, 1);  /* wHeadEmphasis */
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        put_le16(pb, 16); /* fwHeadFlags */
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        put_le32(pb, 0);  /* dwPTSLow */
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        put_le32(pb, 0);  /* dwPTSHigh */
120 889c5224 François Revol
    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
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        put_le16(pb, 2); /* wav_extra_size */
122 361b1b86 Brian Becker
        hdrsize += 2;
123 889c5224 François Revol
        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
124 c4f8d5d9 Michael Niedermayer
    } else if(enc->extradata_size){
125 6748046e Michael Niedermayer
        put_le16(pb, enc->extradata_size);
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        put_buffer(pb, enc->extradata, enc->extradata_size);
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        hdrsize += enc->extradata_size;
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        if(hdrsize&1){
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            hdrsize++;
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            put_byte(pb, 0);
131
        }
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    } else {
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        hdrsize -= 2;
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    }
135 86bec9a1 Juanjo
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    return hdrsize;
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}
138 a9e35095 Diego Biurrun
#endif //CONFIG_MUXERS
139 46a3d068 Fabrice Bellard
140 2e7973bb Roman Shaposhnik
/* We could be given one of the three possible structures here:
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 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
142
 * is an expansion of the previous one with the fields added
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 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
144
 * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
145
 * an openended structure.
146
 */
147
void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size) 
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{
149 e8c00089 Zdenek Kabelac
    int id;
150 e095026a Fabrice Bellard
151
    id = get_le16(pb);
152
    codec->codec_type = CODEC_TYPE_AUDIO;
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    codec->codec_tag = id;
154
    codec->channels = get_le16(pb);
155
    codec->sample_rate = get_le32(pb);
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    codec->bit_rate = get_le32(pb) * 8;
157
    codec->block_align = get_le16(pb);
158 2e7973bb Roman Shaposhnik
    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
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        codec->bits_per_sample = 8;
160 e0ece99a Michael Niedermayer
    }else
161
        codec->bits_per_sample = get_le16(pb);
162
    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
163 f9b5459e Fabrice Bellard
    
164 2e7973bb Roman Shaposhnik
    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
165 cb146faf Zdenek Kabelac
        codec->extradata_size = get_le16(pb);
166
        if (codec->extradata_size > 0) {
167 2e7973bb Roman Shaposhnik
            if (codec->extradata_size > size - 18)
168
                codec->extradata_size = size - 18;
169 3129cd01 Michael Niedermayer
            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
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            get_buffer(pb, codec->extradata, codec->extradata_size);
171 2e7973bb Roman Shaposhnik
        } else
172
            codec->extradata_size = 0;
173
        
174
        /* It is possible for the chunk to contain garbage at the end */
175
        if (size - codec->extradata_size - 18 > 0)
176
            url_fskip(pb, size - codec->extradata_size - 18);
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    }
178
}
179
180
181 46a3d068 Fabrice Bellard
int wav_codec_get_id(unsigned int tag, int bps)
182
{
183
    int id;
184
    id = codec_get_id(codec_wav_tags, tag);
185
    if (id <= 0)
186
        return id;
187
    /* handle specific u8 codec */
188
    if (id == CODEC_ID_PCM_S16LE && bps == 8)
189
        id = CODEC_ID_PCM_U8;
190 b461b3bc Reimar Döffinger
    if (id == CODEC_ID_PCM_S16LE && bps == 24)
191
        id = CODEC_ID_PCM_S24LE;
192
    if (id == CODEC_ID_PCM_S16LE && bps == 32)
193
        id = CODEC_ID_PCM_S32LE;
194 46a3d068 Fabrice Bellard
    return id;
195
}
196
197 a9e35095 Diego Biurrun
#ifdef CONFIG_MUXERS
198 de6d9b64 Fabrice Bellard
typedef struct {
199
    offset_t data;
200
} WAVContext;
201
202
static int wav_write_header(AVFormatContext *s)
203
{
204 c9a65ca8 Fabrice Bellard
    WAVContext *wav = s->priv_data;
205 de6d9b64 Fabrice Bellard
    ByteIOContext *pb = &s->pb;
206
    offset_t fmt;
207
208
    put_tag(pb, "RIFF");
209
    put_le32(pb, 0); /* file length */
210
    put_tag(pb, "WAVE");
211
212
    /* format header */
213
    fmt = start_tag(pb, "fmt ");
214 01f4895c Michael Niedermayer
    if (put_wav_header(pb, s->streams[0]->codec) < 0) {
215 1ea4f593 Fabrice Bellard
        av_free(wav);
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        return -1;
217
    }
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    end_tag(pb, fmt);
219
220 01f4895c Michael Niedermayer
    av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
221 a1e568bd Michael Niedermayer
222 de6d9b64 Fabrice Bellard
    /* data header */
223
    wav->data = start_tag(pb, "data");
224
    
225
    put_flush_packet(pb);
226
227
    return 0;
228
}
229
230 e928649b Michael Niedermayer
static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
231 de6d9b64 Fabrice Bellard
{
232
    ByteIOContext *pb = &s->pb;
233 e928649b Michael Niedermayer
    put_buffer(pb, pkt->data, pkt->size);
234 de6d9b64 Fabrice Bellard
    return 0;
235
}
236
237
static int wav_write_trailer(AVFormatContext *s)
238
{
239
    ByteIOContext *pb = &s->pb;
240
    WAVContext *wav = s->priv_data;
241
    offset_t file_size;
242
243
    if (!url_is_streamed(&s->pb)) {
244
        end_tag(pb, wav->data);
245
246
        /* update file size */
247
        file_size = url_ftell(pb);
248
        url_fseek(pb, 4, SEEK_SET);
249 0c1a9eda Zdenek Kabelac
        put_le32(pb, (uint32_t)(file_size - 8));
250 de6d9b64 Fabrice Bellard
        url_fseek(pb, file_size, SEEK_SET);
251
252
        put_flush_packet(pb);
253
    }
254
    return 0;
255
}
256 a9e35095 Diego Biurrun
#endif //CONFIG_MUXERS
257 de6d9b64 Fabrice Bellard
258
/* return the size of the found tag */
259
/* XXX: > 2GB ? */
260 0c1a9eda Zdenek Kabelac
static int find_tag(ByteIOContext *pb, uint32_t tag1)
261 de6d9b64 Fabrice Bellard
{
262
    unsigned int tag;
263
    int size;
264
265
    for(;;) {
266
        if (url_feof(pb))
267
            return -1;
268
        tag = get_le32(pb);
269
        size = get_le32(pb);
270
        if (tag == tag1)
271
            break;
272
        url_fseek(pb, size, SEEK_CUR);
273
    }
274
    if (size < 0)
275
        size = 0x7fffffff;
276
    return size;
277
}
278
279 c9a65ca8 Fabrice Bellard
static int wav_probe(AVProbeData *p)
280
{
281
    /* check file header */
282
    if (p->buf_size <= 32)
283
        return 0;
284
    if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
285
        p->buf[2] == 'F' && p->buf[3] == 'F' &&
286
        p->buf[8] == 'W' && p->buf[9] == 'A' &&
287
        p->buf[10] == 'V' && p->buf[11] == 'E')
288
        return AVPROBE_SCORE_MAX;
289
    else
290
        return 0;
291
}
292
293 de6d9b64 Fabrice Bellard
/* wav input */
294
static int wav_read_header(AVFormatContext *s,
295
                           AVFormatParameters *ap)
296
{
297
    int size;
298
    unsigned int tag;
299
    ByteIOContext *pb = &s->pb;
300
    AVStream *st;
301
302
    /* check RIFF header */
303
    tag = get_le32(pb);
304
305
    if (tag != MKTAG('R', 'I', 'F', 'F'))
306
        return -1;
307
    get_le32(pb); /* file size */
308
    tag = get_le32(pb);
309
    if (tag != MKTAG('W', 'A', 'V', 'E'))
310
        return -1;
311
    
312
    /* parse fmt header */
313
    size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
314
    if (size < 0)
315
        return -1;
316 c9a65ca8 Fabrice Bellard
    st = av_new_stream(s, 0);
317 de6d9b64 Fabrice Bellard
    if (!st)
318 c9a65ca8 Fabrice Bellard
        return AVERROR_NOMEM;
319 de6d9b64 Fabrice Bellard
320 01f4895c Michael Niedermayer
    get_wav_header(pb, st->codec, size);
321 f9b5459e Fabrice Bellard
    st->need_parsing = 1;
322 595bf4ef Michael Niedermayer
323 01f4895c Michael Niedermayer
    av_set_pts_info(st, 64, 1, st->codec->sample_rate);
324 595bf4ef Michael Niedermayer
325 e095026a Fabrice Bellard
    size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
326
    if (size < 0)
327
        return -1;
328 de6d9b64 Fabrice Bellard
    return 0;
329
}
330
331
#define MAX_SIZE 4096
332
333
static int wav_read_packet(AVFormatContext *s,
334
                           AVPacket *pkt)
335
{
336 f9b5459e Fabrice Bellard
    int ret, size;
337
    AVStream *st;
338 de6d9b64 Fabrice Bellard
339
    if (url_feof(&s->pb))
340 0bd586c5 Mike Melanson
        return AVERROR_IO;
341 f9b5459e Fabrice Bellard
    st = s->streams[0];
342
343
    size = MAX_SIZE;
344 01f4895c Michael Niedermayer
    if (st->codec->block_align > 1) {
345
        if (size < st->codec->block_align)
346
            size = st->codec->block_align;
347
        size = (size / st->codec->block_align) * st->codec->block_align;
348 f9b5459e Fabrice Bellard
    }
349
    if (av_new_packet(pkt, size))
350 0bd586c5 Mike Melanson
        return AVERROR_IO;
351 de6d9b64 Fabrice Bellard
    pkt->stream_index = 0;
352
353
    ret = get_buffer(&s->pb, pkt->data, pkt->size);
354
    if (ret < 0)
355
        av_free_packet(pkt);
356 5ed8fafc Fabrice Bellard
    /* note: we need to modify the packet size here to handle the last
357
       packet */
358
    pkt->size = ret;
359 de6d9b64 Fabrice Bellard
    return ret;
360
}
361
362
static int wav_read_close(AVFormatContext *s)
363
{
364
    return 0;
365
}
366
367 f9b5459e Fabrice Bellard
static int wav_read_seek(AVFormatContext *s, 
368 7b3c1382 Michael Niedermayer
                         int stream_index, int64_t timestamp, int flags)
369 f9b5459e Fabrice Bellard
{
370
    AVStream *st;
371
372
    st = s->streams[0];
373 01f4895c Michael Niedermayer
    switch(st->codec->codec_id) {
374 f9b5459e Fabrice Bellard
    case CODEC_ID_MP2:
375
    case CODEC_ID_MP3:
376
    case CODEC_ID_AC3:
377 23c99253 Michael Niedermayer
    case CODEC_ID_DTS:
378 f9b5459e Fabrice Bellard
        /* use generic seeking with dynamically generated indexes */
379
        return -1;
380
    default:
381
        break;
382
    }
383 7b3c1382 Michael Niedermayer
    return pcm_read_seek(s, stream_index, timestamp, flags);
384 f9b5459e Fabrice Bellard
}
385
386
387 c9a65ca8 Fabrice Bellard
static AVInputFormat wav_iformat = {
388
    "wav",
389
    "wav format",
390
    0,
391
    wav_probe,
392
    wav_read_header,
393
    wav_read_packet,
394
    wav_read_close,
395 f9b5459e Fabrice Bellard
    wav_read_seek,
396 c9a65ca8 Fabrice Bellard
};
397
398 a9e35095 Diego Biurrun
#ifdef CONFIG_MUXERS
399 c9a65ca8 Fabrice Bellard
static AVOutputFormat wav_oformat = {
400 de6d9b64 Fabrice Bellard
    "wav",
401
    "wav format",
402
    "audio/x-wav",
403
    "wav",
404 c9a65ca8 Fabrice Bellard
    sizeof(WAVContext),
405 5ed8fafc Fabrice Bellard
    CODEC_ID_PCM_S16LE,
406 de6d9b64 Fabrice Bellard
    CODEC_ID_NONE,
407
    wav_write_header,
408
    wav_write_packet,
409
    wav_write_trailer,
410
};
411 a9e35095 Diego Biurrun
#endif //CONFIG_MUXERS
412 c9a65ca8 Fabrice Bellard
413 c3775e54 Ronald S. Bultje
int ff_wav_init(void)
414 c9a65ca8 Fabrice Bellard
{
415
    av_register_input_format(&wav_iformat);
416 a9e35095 Diego Biurrun
#ifdef CONFIG_MUXERS
417 c9a65ca8 Fabrice Bellard
    av_register_output_format(&wav_oformat);
418 a9e35095 Diego Biurrun
#endif //CONFIG_MUXERS
419 c9a65ca8 Fabrice Bellard
    return 0;
420
}