int
openwavdest (char *filename, long bcount)
/* returns 0: failure (error_window has NOT been displayed), 1: success.
bcount must be 4 * number_of_samples !
Adapted from bplay.c
*/
{
wavhead header;
char *riff = "RIFF";
char *wave = "WAVE";
char *fmt = "fmt ";
char *data = "data";
if (*filename == '|')
{
destfileispipe = 1; /* remember for closing */
if ((destfile = popen (filename + 1, "w")) == NULL)
return 0;
}
else
{
destfileispipe = 0;
if ((destfile = fopen (filename, "wb")) == NULL)
return 0;
}
memcpy (&(header.main_chunk), riff, 4);
header.length = sizeof (wavhead) - 8 + bcount;
memcpy (&(header.chunk_type), wave, 4);
memcpy (&(header.sub_chunk), fmt, 4);
header.sc_len = 16;
header.format = 1;
header.modus = /*stereo */ 1 + 1;
header.sample_fq = /*speed */ 44100;
header.byte_p_sec = /*((bits > 8)? 2:1)*(stereo+1)*speed */ 2 * 2 * 44100;
header.byte_p_spl = /*(bits > 8)? 2:1 */ 4; /* stereo & 16 bit..? */
header.bit_p_spl = /*bits */ 16; /* stereo doesn't count here? */
memcpy (&(header.data_chunk), data, 4);
header.data_length = bcount;
#ifdef SWAP_ENDIAN
header.length = SwapFourBytes (header.length);
header.sc_len = SwapFourBytes (header.sc_len);
header.format = SwapTwoBytes (header.format);
header.modus = SwapTwoBytes (header.modus);
header.sample_fq = SwapFourBytes (header.sample_fq);
header.byte_p_sec = SwapFourBytes (header.byte_p_sec);
header.byte_p_spl = SwapTwoBytes (header.byte_p_spl);
header.bit_p_spl = SwapTwoBytes (header.bit_p_spl);
header.data_length = SwapFourBytes (header.data_length);
#endif
fwrite (&header, sizeof (header), 1, destfile);
num_write_samples_buffered = 0; /* just in case */
return 1;
}
WORD tenc_decode_int (BYTE *src)
{
WORD value = *((WORD *) src);
#if defined (TVM_BIG_ENDIAN)
return value;
#elif TVM_WORD_LENGTH == 4
return SwapFourBytes (value);
#elif TVM_WORD_LENGTH == 2
return SwapTwoBytes (value);
#else
#error "Unknown TVM_WORD_LENGTH"
#endif
}
int
openwavsource (char *filename)
/* returns 0: failure (error_window has been displayed), 1: success.
More or less adapted from bplay.c, with stdio-patch by Axel Kohlmeyer
*/
{
int count;
char hd_buf[20];
wavhead wavhd;
if ((sourcefile = fopen (filename, "rb")) == NULL)
{
fprintf (stderr, "The source wav file [%s] could not be opened.\n", filename);
return 0;
}
count = fread (hd_buf, 1, 20, sourcefile);
if (count < 20)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] could not be read, or is too short.\n", filename);
return 0;
}
if (strstr (hd_buf, "RIFF") == NULL)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] is not a .wav file, and can not be processed.\n", filename);
return 0;
}
memcpy ((void *) &wavhd, (void *) hd_buf, 20);
count = fread (((char *) &wavhd) + 20, 1, sizeof (wavhd) - 20, sourcefile);
if (count < sizeof (wavhd) - 20)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s]is too short. Probably it is not a .wav sound file.\n", filename);
return 0;
}
#ifdef SWAP_ENDIAN
wavhd.format = SwapTwoBytes (wavhd.format);
wavhd.sample_fq = SwapFourBytes (wavhd.sample_fq);
wavhd.bit_p_spl = SwapTwoBytes (wavhd.bit_p_spl);
wavhd.modus = SwapTwoBytes (wavhd.modus);
#endif
if (wavhd.format != 1)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] is a .wav file with unknown format, and can not be processed.\n", filename);
return 0;
}
if (wavhd.sample_fq != 44100)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] is not sampled at 44100 Hz, and can not be processed.\n", filename);
return 0;
}
if (wavhd.bit_p_spl != 16)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] does not have 16 bit samples, and can not be processed.", filename);
return 0;
}
if (wavhd.modus != 2)
{
fclose (sourcefile);
fprintf (stderr, "The source file [%s] is not stereo, and can not be processed.", filename);
return 0;
}
/* Well, everything seems to be OK */
num_read_samples_buffered = 0;
return 1;
}
/*{{{ TEncode functions based on those in tencode.c */
static UWORD avr_tenc_decode_int (const prog_char *src) {
return SwapTwoBytes (pgm_read_word ((const prog_int16_t *) src));
}