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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Antonius Hellmann
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef SIMULATOR
#include "codeclib.h"
#include "libwavpack/wavpack.h"
CODEC_HEADER
typedef unsigned long uint32;
typedef unsigned short uint16;
typedef unsigned char uint8;
static unsigned char wav_header_ster [46] =
{33,22,'R','I','F','F',0,0,0,0,'W','A','V','E','f','m','t',' ',16,
0,0,0,1,0,2,0,0x44,0xac,0,0,0x10,0xb1,2,0,4,0,16,0,'d','a','t','a',0,0,0,0};
static unsigned char wav_header_mono [46] =
{33,22,'R','I','F','F',0,0,0,0,'W','A','V','E','f','m','t',' ',16,
0,0,0,1,0,1,0,0x44,0xac,0,0,0x88,0x58,1,0,2,0,16,0,'d','a','t','a',0,0,0,0};
static struct codec_api *ci;
static int enc_channels;
#define CHUNK_SIZE 20000
static long input_buffer[CHUNK_SIZE/2] IBSS_ATTR;
void *memset(void *s, int c, size_t n)
{
return(ci->memset(s,c,n));
}
void *memcpy(void *dest, const void *src, size_t n)
{
return(ci->memcpy(dest,src,n));
}
/* update file header info callback function */
void enc_set_header(void *head_buffer, /* ptr to the file header data */
int head_size, /* size of this header data */
int num_pcm_sampl, /* amount of processed pcm samples */
bool is_file_header) /* update file/chunk header */
{
if(is_file_header)
{
/* update file header before file closing */
if(sizeof(WavpackHeader) + sizeof(wav_header_mono) < (unsigned)head_size)
{
char* riff_header = (char*)head_buffer + sizeof(WavpackHeader);
char* wv_header = (char*)head_buffer + sizeof(wav_header_mono);
int num_file_bytes = num_pcm_sampl * 2 * enc_channels;
unsigned long ckSize;
/* RIFF header and WVPK header have to be swapped */
/* copy wavpack header to file start position */
ci->memcpy(head_buffer, wv_header, sizeof(WavpackHeader));
wv_header = head_buffer; /* recalc wavpack header position */
if(enc_channels == 2)
ci->memcpy(riff_header, wav_header_ster, sizeof(wav_header_ster));
else
ci->memcpy(riff_header, wav_header_mono, sizeof(wav_header_mono));
/* update the Wavpack header first chunk size & total frame count */
ckSize = htole32(((WavpackHeader*)wv_header)->ckSize)
+ sizeof(wav_header_mono);
((WavpackHeader*)wv_header)->total_samples = htole32(num_pcm_sampl);
((WavpackHeader*)wv_header)->ckSize = htole32(ckSize);
/* update the RIFF WAV header size entries */
*(long*)(riff_header+ 6) = htole32(num_file_bytes + 36);
*(long*)(riff_header+42) = htole32(num_file_bytes);
}
}
else
{
/* update timestamp (block_index) */
((WavpackHeader*)head_buffer)->block_index = htole32(num_pcm_sampl);
}
}
enum codec_status codec_start(struct codec_api* api)
{
int i;
long t;
uint32 *src;
uint32 *dst;
int chunk_size, num_chunks, samp_per_chunk;
int enc_buffer_size;
int enc_quality;
WavpackConfig config;
WavpackContext *wpc;
bool cpu_boosted = true; /* start boosted */
ci = api; // copy to global api pointer
if(ci->enc_get_inputs == NULL ||
ci->enc_set_parameters == NULL ||
ci->enc_alloc_chunk == NULL ||
ci->enc_free_chunk == NULL ||
ci->enc_wavbuf_near_empty == NULL ||
ci->enc_get_wav_data == NULL ||
ci->enc_set_header_callback == NULL )
return CODEC_ERROR;
ci->cpu_boost(true);
*ci->enc_set_header_callback = enc_set_header;
ci->enc_get_inputs(&enc_buffer_size, &enc_channels, &enc_quality);
/* configure the buffer system */
chunk_size = sizeof(long) + CHUNK_SIZE * enc_channels / 2;
num_chunks = enc_buffer_size / chunk_size;
samp_per_chunk = CHUNK_SIZE / 4;
/* inform the main program about buffer dimensions and other params */
/* add wav_header_mono as place holder to file start position */
/* wav header and wvpk header have to be reordered later */
ci->enc_set_parameters(chunk_size, num_chunks, samp_per_chunk,
wav_header_mono, sizeof(wav_header_mono),
AFMT_WAVPACK);
wpc = WavpackOpenFileOutput ();
memset (&config, 0, sizeof (config));
config.bits_per_sample = 16;
config.bytes_per_sample = 2;
config.sample_rate = 44100;
config.num_channels = enc_channels;
if (!WavpackSetConfiguration (wpc, &config, 1))
return CODEC_ERROR;
/* main application waits for this flag during encoder loading */
ci->enc_codec_loaded = true;
/* main encoding loop */
while(!ci->stop_codec)
{
while((src = (uint32*)ci->enc_get_wav_data(CHUNK_SIZE)) != NULL)
{
if(ci->stop_codec)
break;
if(ci->enc_wavbuf_near_empty() == 0)
{
if(!cpu_boosted)
{
ci->cpu_boost(true);
cpu_boosted = true;
}
}
dst = (uint32*)ci->enc_alloc_chunk() + 1;
WavpackStartBlock (wpc, (uint8*)dst, (uint8*)dst + CHUNK_SIZE);
if(enc_channels == 2)
{
for (i=0; i<CHUNK_SIZE/4; i++)
{
t = (long)*src++;
input_buffer[2*i + 0] = t >> 16;
input_buffer[2*i + 1] = (short)t;
}
}
else
{
for (i=0; i<CHUNK_SIZE/4; i++)
{
t = (long)*src++;
t = (((t<<16)>>16) + (t>>16)) >> 1; /* left+right */
input_buffer[i] = t;
}
}
if (!WavpackPackSamples (wpc, input_buffer, CHUNK_SIZE/4))
return CODEC_ERROR;
/* finish the chunk and store chunk size info */
dst[-1] = WavpackFinishBlock (wpc);
ci->enc_free_chunk();
ci->yield();
}
if(ci->enc_wavbuf_near_empty())
{
if(cpu_boosted)
{
ci->cpu_boost(false);
cpu_boosted = false;
}
}
ci->yield();
}
if(cpu_boosted) /* set initial boost state */
ci->cpu_boost(false);
/* reset parameters to initial state */
ci->enc_set_parameters(0, 0, 0, 0, 0, 0);
/* main application waits for this flag during encoder removing */
ci->enc_codec_loaded = false;
return CODEC_OK;
}
#endif
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