bool RageSurfaceUtils::SaveBMP( RageSurface *surface, RageFile &f )
{
/* Convert the surface to 24bpp. */
RageSurface *converted_surface;
converted_surface = CreateSurface( surface->w, surface->h, 24,
Swap24LE( 0xFF0000 ), Swap24LE( 0x00FF00 ), Swap24LE( 0x0000FF ), 0 );
RageSurfaceUtils::CopySurface( surface, converted_surface );
RString sError;
int iFilePitch = converted_surface->pitch;
iFilePitch = (iFilePitch+3) & ~3; // round up a multiple of 4
int iDataSize = converted_surface->h * iFilePitch;
const int iHeaderSize = 0x36;
WriteBytes( f, sError, "BM", 2 );
write_le32( f, sError, iHeaderSize+iDataSize ); // size (offset 0x2)
write_le32( f, sError, 0 ); // reserved (offset 0x6)
write_le32( f, sError, iHeaderSize ); // bitmap offset (offset 0xA)
write_le32( f, sError, 0x28 ); // header size (offset 0xE)
write_le32( f, sError, surface->w ); // width (offset 0x14)
write_le32( f, sError, surface->h ); // height (offset 0x18)
write_le16( f, sError, 1 ); // planes (offset 0x1A)
write_le16( f, sError, (uint16_t) converted_surface->fmt.BytesPerPixel*8 ); // bpp (offset 0x1C)
write_le32( f, sError, 0 ); // compression (offset 0x1E)
write_le32( f, sError, iDataSize ); // bitmap size (offset 0x22)
write_le32( f, sError, 0 ); // horiz resolution (offset 0x26)
write_le32( f, sError, 0 ); // vert resolution (offset 0x2A)
write_le32( f, sError, 0 ); // colors (offset 0x2E)
write_le32( f, sError, 0 ); // important colors (offset 0x32)
for( int y = converted_surface->h-1; y >= 0; --y )
{
const uint8_t *pRow = converted_surface->pixels + converted_surface->pitch*y;
WriteBytes( f, sError, pRow, converted_surface->pitch );
/* Pad the row to the pitch. */
uint8_t padding[4] = { 0,0,0,0 };
WriteBytes( f, sError, padding, iFilePitch-converted_surface->pitch );
}
delete converted_surface;
if( sError.size() != 0 )
return false;
if( f.Flush() == -1 )
return false;
return true;
}
int main() {
output_file = fopen("output.wav", "wb");
if (!output_file)
die_perror("failed to open file");
int samplerate = SAMPLE_RATE;
int channels = 2;
int bitspersample = 16;
int datarate = samplerate * channels * (bitspersample / 8);
int blockalign = channels * (bitspersample / 8);
// write wav header
output_write("RIFF", 4);
long riff_len_pos = ftell(output_file); // need to write 36+datalen to riff_len_pos
write_le32(0);
output_write("WAVE", 4);
output_write("fmt ", 4);
write_le32(16);
write_le16(1);
write_le16(channels);
write_le32(samplerate);
write_le32(datarate);
write_le16(blockalign);
write_le16(bitspersample);
output_write("data", 4);
long wav_data_pos = ftell(output_file); // need to write datalen to wav_data_pos
write_le32(0);
int i;
for (i = 0; i < 22050; i++) output_sample(0, 0); // write 500ms of silence
write_pulse(1, 4909, 1000000); // command start
write_pulse(0, 4320, 1000000);
i = 0;
unsigned code = 0xe0e040bf;
for (i = 0; i < 32; i++) {
int bit = (code >> (31 - i)) & 0x1;
if (bit) {
write_pulse(1, 818, 1000000); // 1 bit
write_pulse(0, 1425, 1000000);
} else {
write_pulse(1, 818, 1000000); // 0 bit
write_pulse(0, 325, 1000000);
}
}
write_pulse(1, 717, 1000000); // command stop
write_pulse(0, 717, 1000000);
for (i = 0; i < 22050; i++) output_sample(0, 0); // write 500ms of silence
fseek(output_file, riff_len_pos, SEEK_SET);
write_le32(36 + datalen);
fseek(output_file, wav_data_pos, SEEK_SET);
write_le32(datalen);
fclose(output_file);
return 0;
}
