3716abba92
- wav(RIFF) supports Microsoft ADPCM, Dialogic OKI ADPCM, YAMAHA ADPCM, Adobe SWF ADPCM. - AIFF supports QuickTime IMA ADPCM. - DVI ADPCM(IMA ADPCM) reworks. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24782 a1c6a512-1295-4272-9138-f99709370657
258 lines
8.5 KiB
C
258 lines
8.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include "system.h"
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#include "metadata.h"
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#include "metadata_common.h"
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#include "metadata_parsers.h"
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#include "logf.h"
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# define AV_WL32(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; \
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((uint8_t*)(p))[2] = (d)>>16; \
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((uint8_t*)(p))[3] = (d)>>24; \
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} while(0)
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# define AV_WL16(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; \
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} while(0)
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enum
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{
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WAVE_FORMAT_PCM = 0x0001, /* Microsoft PCM Format */
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WAVE_FORMAT_ADPCM = 0x0002, /* Microsoft ADPCM Format */
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WAVE_FORMAT_IEEE_FLOAT = 0x0003, /* IEEE Float */
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WAVE_FORMAT_ALAW = 0x0006, /* Microsoft ALAW */
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WAVE_FORMAT_MULAW = 0x0007, /* Microsoft MULAW */
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WAVE_FORMAT_DVI_ADPCM = 0x0011, /* Intel's DVI ADPCM */
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WAVE_FORMAT_DIALOGIC_OKI_ADPCM = 0x0017, /* Dialogic OKI ADPCM */
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WAVE_FORMAT_YAMAHA_ADPCM = 0x0020, /* Yamaha ADPCM */
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WAVE_FORMAT_XBOX_ADPCM = 0x0069, /* XBOX ADPCM */
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IBM_FORMAT_MULAW = 0x0101, /* same as WAVE_FORMAT_MULAW */
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IBM_FORMAT_ALAW = 0x0102, /* same as WAVE_FORMAT_ALAW */
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WAVE_FORMAT_ATRAC3 = 0x0270, /* Atrac3 stream */
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WAVE_FORMAT_SWF_ADPCM = 0x5346, /* Adobe SWF ADPCM */
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};
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struct wave_fmt {
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unsigned int formattag;
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unsigned long channels;
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unsigned int blockalign;
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unsigned long bitspersample;
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unsigned int samplesperblock;
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unsigned long numbytes;
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};
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static unsigned long get_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3)
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{
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unsigned long totalsamples = 0;
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switch (fmt->formattag)
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{
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case WAVE_FORMAT_PCM:
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case WAVE_FORMAT_IEEE_FLOAT:
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case WAVE_FORMAT_ALAW:
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case WAVE_FORMAT_MULAW:
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case IBM_FORMAT_ALAW:
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case IBM_FORMAT_MULAW:
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totalsamples =
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fmt->numbytes / ((((fmt->bitspersample - 1) / 8) + 1) * fmt->channels);
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break;
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case WAVE_FORMAT_ADPCM:
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case WAVE_FORMAT_DVI_ADPCM:
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case WAVE_FORMAT_XBOX_ADPCM:
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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break;
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case WAVE_FORMAT_YAMAHA_ADPCM:
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if (fmt->samplesperblock == 0)
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{
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if (fmt->blockalign == ((id3->frequency / 60) + 4) * fmt->channels)
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fmt->samplesperblock = id3->frequency / 30;
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else
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fmt->samplesperblock = fmt->blockalign * 2 / fmt->channels;
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}
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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break;
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case WAVE_FORMAT_DIALOGIC_OKI_ADPCM:
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totalsamples = 2 * fmt->numbytes;
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break;
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case WAVE_FORMAT_SWF_ADPCM:
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if (fmt->samplesperblock == 0)
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fmt->samplesperblock = (((fmt->blockalign << 3) - 2) / fmt->channels - 22)
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/ fmt->bitspersample;
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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break;
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default:
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totalsamples = 0;
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break;
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}
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return totalsamples;
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}
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bool get_wave_metadata(int fd, struct mp3entry* id3)
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{
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/* Use the trackname part of the id3 structure as a temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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struct wave_fmt fmt;
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unsigned long totalsamples = 0;
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unsigned long offset = 0;
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int read_bytes;
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int i;
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memset(&fmt, 0, sizeof(struct wave_fmt));
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/* get RIFF chunk header */
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if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 12) < 12))
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{
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return false;
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}
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offset += 12;
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if ((memcmp(buf, "RIFF", 4) != 0) || (memcmp(&buf[8], "WAVE", 4) != 0))
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{
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DEBUGF("metadata error: missing riff header.\n");
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return false;
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}
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/* iterate over WAVE chunks until 'data' chunk */
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while (true)
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{
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/* get chunk header */
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if (read(fd, buf, 8) < 8)
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return false;
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offset += 8;
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/* chunkSize */
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i = get_long_le(&buf[4]);
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if (memcmp(buf, "fmt ", 4) == 0)
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{
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/* get rest of chunk */
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if (i < 16)
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return false;
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read_bytes = 16;
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if (i > 19)
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read_bytes = 20;
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if (read(fd, buf, read_bytes) != read_bytes)
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return false;
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offset += read_bytes;
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i -= read_bytes;
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/* wFormatTag */
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fmt.formattag = buf[0] | (buf[1] << 8);
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/* wChannels */
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fmt.channels = buf[2] | (buf[3] << 8);
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/* dwSamplesPerSec */
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id3->frequency = get_long_le(&buf[4]);
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/* dwAvgBytesPerSec */
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id3->bitrate = (get_long_le(&buf[8]) * 8) / 1000;
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/* wBlockAlign */
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fmt.blockalign = buf[12] | (buf[13] << 8);
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id3->bytesperframe = fmt.blockalign;
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/* wBitsPerSample */
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fmt.bitspersample = buf[14] | (buf[15] << 8);
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if (read_bytes > 19)
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{
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/* wSamplesPerBlock */
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fmt.samplesperblock = buf[18] | (buf[19] << 8);
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}
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/* Check for ATRAC3 stream */
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if (fmt.formattag == WAVE_FORMAT_ATRAC3)
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{
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int jsflag = 0;
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if(id3->bitrate == 66 || id3->bitrate == 94)
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jsflag = 1;
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id3->extradata_size = 14;
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id3->channels = 2;
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id3->codectype = AFMT_OMA_ATRAC3;
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/* Store the extradata for the codec */
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AV_WL16(&id3->id3v2buf[0], 1); // always 1
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AV_WL32(&id3->id3v2buf[2], id3->frequency); // samples rate
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AV_WL16(&id3->id3v2buf[6], jsflag); // coding mode
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AV_WL16(&id3->id3v2buf[8], jsflag); // coding mode
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AV_WL16(&id3->id3v2buf[10], 1); // always 1
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AV_WL16(&id3->id3v2buf[12], 0); // always 0
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}
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}
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else if (memcmp(buf, "data", 4) == 0)
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{
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fmt.numbytes = i;
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if (fmt.formattag == WAVE_FORMAT_ATRAC3)
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id3->first_frame_offset = offset;
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break;
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}
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else if (memcmp(buf, "fact", 4) == 0)
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{
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/* dwSampleLength */
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if (i >= 4)
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{
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/* get rest of chunk */
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if (read(fd, buf, 4) < 4)
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return false;
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offset += 4;
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i -= 4;
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totalsamples = get_long_le(buf);
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}
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}
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/* seek to next chunk (even chunk sizes must be padded) */
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if (i & 0x01)
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i++;
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if(lseek(fd, i, SEEK_CUR) < 0)
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return false;
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offset += i;
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}
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if ((fmt.numbytes == 0) || (fmt.channels == 0) || (fmt.blockalign == 0))
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{
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DEBUGF("metadata error: numbytes, channels, or blockalign is 0.\n");
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return false;
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}
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if (totalsamples == 0)
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{
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totalsamples = get_totalsamples(&fmt, id3);
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}
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id3->vbr = false; /* All WAV files are CBR */
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id3->filesize = filesize(fd);
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/* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
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if(id3->codectype != AFMT_OMA_ATRAC3)
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id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
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else
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id3->length = ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
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return true;
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}
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