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rockbox/lib/rbcodec/codecs/wav.c
Michael Sevakis 3fd25dcbed Purge the usage of DSP_SWITCH_FREQUENCY. 
DSP_SWITCH_FREQUENCY has been deprecated and the same enumerated value
as DSP_SET_FREQUENCY since major DSP revisions were committed. This
task should have been performed much earlier but, oh well, do it now.

Change-Id: I3f30d651b894136a07c7e17f78fc16a7d98631ff
2013-05-05 00:48:40 -04:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
* Copyright (C) 2009 Yoshihisa Uchida
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "codeclib.h"
#include "codecs/libpcm/support_formats.h"
CODEC_HEADER
/* WAVE (RIFF) codec:
*
* For a good documentation on WAVE files, see:
* http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/WAVE/WAVE.html
* and
* http://www.sonicspot.com/guide/wavefiles.html
*
* For sample WAV files, see:
* http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/WAVE/Samples.html
*
*/
#define PCM_SAMPLE_SIZE (4096*2)
static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR;
/* This codec support WAVE files with the following formats: */
enum
{
WAVE_FORMAT_UNKNOWN = 0x0000, /* Microsoft Unknown Wave Format */
WAVE_FORMAT_PCM = 0x0001, /* Microsoft PCM Format */
WAVE_FORMAT_ADPCM = 0x0002, /* Microsoft ADPCM Format */
WAVE_FORMAT_IEEE_FLOAT = 0x0003, /* IEEE Float */
WAVE_FORMAT_ALAW = 0x0006, /* Microsoft ALAW */
WAVE_FORMAT_MULAW = 0x0007, /* Microsoft MULAW */
WAVE_FORMAT_DVI_ADPCM = 0x0011, /* Intel's DVI ADPCM */
WAVE_FORMAT_DIALOGIC_OKI_ADPCM = 0x0017, /* Dialogic OKI ADPCM */
WAVE_FORMAT_YAMAHA_ADPCM = 0x0020, /* Yamaha ADPCM */
WAVE_FORMAT_XBOX_ADPCM = 0x0069, /* XBOX ADPCM */
IBM_FORMAT_MULAW = 0x0101, /* same as WAVE_FORMAT_MULAW */
IBM_FORMAT_ALAW = 0x0102, /* same as WAVE_FORMAT_ALAW */
WAVE_FORMAT_SWF_ADPCM = 0x5346, /* Adobe SWF ADPCM */
WAVE_FORMAT_EXTENSIBLE = 0xFFFE
};
static const struct pcm_entry wave_codecs[] = {
{ WAVE_FORMAT_UNKNOWN, 0 },
{ WAVE_FORMAT_PCM, get_linear_pcm_codec },
{ WAVE_FORMAT_ADPCM, get_ms_adpcm_codec },
{ WAVE_FORMAT_IEEE_FLOAT, get_ieee_float_codec },
{ WAVE_FORMAT_ALAW, get_itut_g711_alaw_codec },
{ WAVE_FORMAT_MULAW, get_itut_g711_mulaw_codec },
{ WAVE_FORMAT_DVI_ADPCM, get_dvi_adpcm_codec },
{ WAVE_FORMAT_DIALOGIC_OKI_ADPCM, get_dialogic_oki_adpcm_codec },
{ WAVE_FORMAT_YAMAHA_ADPCM, get_yamaha_adpcm_codec },
{ WAVE_FORMAT_XBOX_ADPCM, get_dvi_adpcm_codec },
{ IBM_FORMAT_MULAW, get_itut_g711_mulaw_codec },
{ IBM_FORMAT_ALAW, get_itut_g711_alaw_codec },
{ WAVE_FORMAT_SWF_ADPCM, get_swf_adpcm_codec },
};
#define NUM_FORMATS 13
static const struct pcm_codec *get_wave_codec(uint32_t formattag)
{
int i;
for (i = 0; i < NUM_FORMATS; i++)
{
if (wave_codecs[i].format_tag == formattag)
{
if (wave_codecs[i].get_codec)
return wave_codecs[i].get_codec();
return 0;
}
}
return 0;
}
static struct pcm_format format;
static uint32_t bytesdone;
static bool set_msadpcm_coeffs(const uint8_t *buf)
{
int i;
int num;
int size;
buf += 4; /* skip 'fmt ' */
size = buf[0] | (buf[1] << 8) | (buf[1] << 16) | (buf[1] << 24);
if (size < 50)
{
DEBUGF("CODEC_ERROR: microsoft adpcm 'fmt ' chunk size=%lu < 50\n",
(unsigned long)size);
return false;
}
/* get nNumCoef */
buf += 24;
num = buf[0] | (buf[1] << 8);
/*
* In many case, nNumCoef is 7.
* Depending upon the encoder, as for this value there is a possibility of
* increasing more.
* If you found the file where this value exceeds 7, please report.
*/
if (num != MSADPCM_NUM_COEFF)
{
DEBUGF("CODEC_ERROR: microsoft adpcm nNumCoef=%d != 7\n", num);
return false;
}
/* get aCoeffs */
buf += 2;
for (i = 0; i < MSADPCM_NUM_COEFF; i++)
{
format.coeffs[i][0] = buf[0] | (SE(buf[1]) << 8);
format.coeffs[i][1] = buf[2] | (SE(buf[3]) << 8);
buf += 4;
}
return true;
}
static uint8_t *read_buffer(size_t *realsize)
{
uint8_t *buffer = (uint8_t *)ci->request_buffer(realsize, format.chunksize);
if (bytesdone + (*realsize) > format.numbytes)
*realsize = format.numbytes - bytesdone;
bytesdone += *realsize;
ci->advance_buffer(*realsize);
return buffer;
}
/* this is the codec entry point */
enum codec_status codec_main(enum codec_entry_call_reason reason)
{
if (reason == CODEC_LOAD) {
/* Generic codec initialisation */
ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
}
return CODEC_OK;
}
/* this is called for each file to process */
enum codec_status codec_run(void)
{
uint32_t decodedsamples;
size_t n;
int bufcount;
int endofstream;
unsigned char *buf;
uint8_t *wavbuf;
off_t firstblockposn; /* position of the first block in file */
const struct pcm_codec *codec;
uint32_t size;
intptr_t param;
if (codec_init()) {
DEBUGF("codec_init() error\n");
return CODEC_ERROR;
}
codec_set_replaygain(ci->id3);
/* Need to save offset for later use (cleared indirectly by advance_buffer) */
bytesdone = ci->id3->offset;
/* get RIFF chunk header */
ci->seek_buffer(0);
buf = ci->request_buffer(&n, 12);
if (n < 12) {
DEBUGF("request_buffer error\n");
return CODEC_ERROR;
}
if ((memcmp(buf, "RIFF", 4) != 0) || (memcmp(&buf[8], "WAVE", 4) != 0)) {
DEBUGF("CODEC_ERROR: missing riff header\n");
return CODEC_ERROR;
}
/* advance to first WAVE chunk */
ci->advance_buffer(12);
firstblockposn = 12;
ci->memset(&format, 0, sizeof(struct pcm_format));
format.is_signed = true;
format.is_little_endian = true;
decodedsamples = 0;
codec = 0;
/* iterate over WAVE chunks until the 'data' chunk, which should be after the 'fmt ' chunk */
while (true) {
/* get WAVE chunk header */
buf = ci->request_buffer(&n, 1024);
if (n < 8) {
DEBUGF("data chunk request_buffer error\n");
/* no more chunks, 'data' chunk must not have been found */
return CODEC_ERROR;
}
/* chunkSize */
size = (buf[4]|(buf[5]<<8)|(buf[6]<<16)|(buf[7]<<24));
if (memcmp(buf, "fmt ", 4) == 0) {
if (size < 16) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk size=%lu < 16\n",
(unsigned long)size);
return CODEC_ERROR;
}
/* wFormatTag */
format.formattag=buf[8]|(buf[9]<<8);
/* wChannels */
format.channels=buf[10]|(buf[11]<<8);
/* skipping dwSamplesPerSec */
/* skipping dwAvgBytesPerSec */
/* wBlockAlign */
format.blockalign=buf[20]|(buf[21]<<8);
/* wBitsPerSample */
format.bitspersample=buf[22]|(buf[23]<<8);
if (format.formattag != WAVE_FORMAT_PCM) {
if (size < 18) {
/* this is not a fatal error with some formats,
* we'll see later if we can't decode it */
DEBUGF("CODEC_WARNING: non-PCM WAVE (formattag=0x%x) "
"doesn't have ext. fmt descr (chunksize=%d<18).\n",
(unsigned int)format.formattag, (int)size);
}
else
{
if (format.formattag != WAVE_FORMAT_EXTENSIBLE)
format.samplesperblock = buf[26]|(buf[27]<<8);
else
{
format.size = buf[24]|(buf[25]<<8);
if (format.size < 22) {
DEBUGF("CODEC_ERROR: WAVE_FORMAT_EXTENSIBLE is "
"missing extension\n");
return CODEC_ERROR;
}
/* wValidBitsPerSample */
format.bitspersample = buf[26]|(buf[27]<<8);
/* skipping dwChannelMask (4bytes) */
/* SubFormat (only get the first two bytes) */
format.formattag = buf[32]|(buf[33]<<8);
}
}
}
/* msadpcm specific */
if (format.formattag == WAVE_FORMAT_ADPCM)
{
if (!set_msadpcm_coeffs(buf))
{
return CODEC_ERROR;
}
}
/* get codec */
codec = get_wave_codec(format.formattag);
if (!codec)
{
DEBUGF("CODEC_ERROR: unsupported wave format 0x%x\n",
(unsigned int) format.formattag);
return CODEC_ERROR;
}
/* riff 8bit linear pcm is unsigned */
if (format.formattag == WAVE_FORMAT_PCM && format.bitspersample == 8)
format.is_signed = false;
/* set format, parse codec specific tag, check format, and calculate chunk size */
if (!codec->set_format(&format))
{
return CODEC_ERROR;
}
} else if (memcmp(buf, "data", 4) == 0) {
format.numbytes = size;
/* advance to start of data */
ci->advance_buffer(8);
firstblockposn += 8;
break;
} else if (memcmp(buf, "fact", 4) == 0) {
/* dwSampleLength */
if (size >= 4)
format.totalsamples =
(buf[8]|(buf[9]<<8)|(buf[10]<<16)|(buf[11]<<24));
} else {
DEBUGF("unknown WAVE chunk: '%c%c%c%c', size=%lu\n",
buf[0], buf[1], buf[2], buf[3], (unsigned long)size);
}
/* go to next chunk (even chunk sizes must be padded) */
size += 8 + (size & 0x01);
ci->advance_buffer(size);
firstblockposn += size;
}
if (!codec)
{
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found\n");
return CODEC_ERROR;
}
/* common format check */
if (format.channels == 0) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-channels file\n");
return CODEC_ERROR;
}
if (format.samplesperblock == 0) {
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-wSamplesPerBlock file\n");
return CODEC_ERROR;
}
if (format.blockalign == 0)
{
DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-blockalign file\n");
return CODEC_ERROR;
}
if (format.numbytes == 0) {
DEBUGF("CODEC_ERROR: 'data' chunk not found or has zero-length\n");
return CODEC_ERROR;
}
/* check chunksize */
if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
> PCM_SAMPLE_SIZE)
format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
if (format.chunksize == 0)
{
DEBUGF("CODEC_ERROR: chunksize is 0\n");
return CODEC_ERROR;
}
ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency);
if (format.channels == 2) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
} else if (format.channels == 1) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
} else {
DEBUGF("CODEC_ERROR: more than 2 channels\n");
return CODEC_ERROR;
}
/* make sure we're at the correct offset */
if (bytesdone > (uint32_t) firstblockposn) {
/* Round down to previous block */
struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn,
PCM_SEEK_POS, &read_buffer);
if (newpos->pos > format.numbytes)
return CODEC_OK;
if (ci->seek_buffer(firstblockposn + newpos->pos))
{
bytesdone = newpos->pos;
decodedsamples = newpos->samples;
}
} else {
/* already where we need to be */
bytesdone = 0;
}
ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
/* The main decoder loop */
endofstream = 0;
while (!endofstream) {
enum codec_command_action action = ci->get_command(&param);
if (action == CODEC_ACTION_HALT)
break;
if (action == CODEC_ACTION_SEEK_TIME) {
struct pcm_pos *newpos = codec->get_seek_pos(param, PCM_SEEK_TIME,
&read_buffer);
if (newpos->pos > format.numbytes)
{
ci->set_elapsed(ci->id3->length);
ci->seek_complete();
break;
}
if (ci->seek_buffer(firstblockposn + newpos->pos))
{
bytesdone = newpos->pos;
decodedsamples = newpos->samples;
}
ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
ci->seek_complete();
}
wavbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
if (n == 0)
break; /* End of stream */
if (bytesdone + n > format.numbytes) {
n = format.numbytes - bytesdone;
endofstream = 1;
}
if (codec->decode(wavbuf, n, samples, &bufcount) == CODEC_ERROR)
{
DEBUGF("codec error\n");
return CODEC_ERROR;
}
ci->pcmbuf_insert(samples, NULL, bufcount);
ci->advance_buffer(n);
bytesdone += n;
decodedsamples += bufcount;
if (bytesdone >= format.numbytes)
endofstream = 1;
ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
}
return CODEC_OK;
}
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