SAMPLE *eof_mix_load_ogg_sample(char *fn)
{
// eof_log("eof_mix_load_ogg_sample() entered");
ALOGG_OGG * temp_ogg = NULL;
char * buffer = NULL;
SAMPLE *loadedsample = NULL;
if(fn == NULL)
{
return NULL;
}
buffer = eof_buffer_file(fn, 0);
if(buffer)
{
temp_ogg = alogg_create_ogg_from_buffer(buffer, file_size_ex(fn));
if(temp_ogg)
{
loadedsample = alogg_create_sample_from_ogg(temp_ogg);
alogg_destroy_ogg(temp_ogg);
}
if(loadedsample == NULL)
allegro_message("Couldn't load sample %s!",fn);
free(buffer);
}
return loadedsample;
}
int eof_add_silence_recode(char * oggfn, unsigned long ms)
{
char sys_command[1024] = {0};
char backupfn[1024] = {0};
char wavfn[1024] = {0};
char soggfn[1024] = {0};
ALOGG_OGG *oggfile = NULL;
SAMPLE *decoded = NULL, *combined = NULL;
int bits;
int stereo;
int freq;
unsigned long samples;
int channels;
unsigned long ctr,index;
void * oggbuffer = NULL;
int bitrate;
eof_log("eof_add_silence_recode() entered", 1);
if(!oggfn || (ms == 0) || eof_silence_loaded)
{
return 41; //Return failure: Invalid parameters
}
set_window_title("Adjusting Silence...");
/* back up original file */
(void) snprintf(backupfn, sizeof(backupfn) - 1, "%s.backup", oggfn);
if(!exists(backupfn))
{
(void) eof_copy_file(oggfn, backupfn);
}
/* Decode the OGG file into memory */
//Load OGG file into memory
oggbuffer = eof_buffer_file(oggfn, 0); //Decode the OGG from buffer instead of from file because the latter cannot support special characters in the file path due to limitations with fopen()
if(!oggbuffer)
{
(void) snprintf(eof_log_string, sizeof(eof_log_string) - 1, "\tError reading OGG: \"%s\"", strerror(errno)); //Get the Operating System's reason for the failure
eof_log(eof_log_string, 1);
return 42; //Return failure: Could not buffer chart audio into memory
}
oggfile=alogg_create_ogg_from_buffer(oggbuffer, (int)file_size_ex(oggfn));
if(oggfile == NULL)
{
eof_log("ALOGG failed to open input audio file", 1);
free(oggbuffer);
return 43; //Return failure: Could not process buffered chart audio
}
//Decode OGG into memory
decoded=alogg_create_sample_from_ogg(oggfile);
if(decoded == NULL)
{
alogg_destroy_ogg(oggfile);
free(oggbuffer);
return 44; //Return failure: Could not decode chart audio to memory
}
/* Create a SAMPLE array large enough for the leading silence and the decoded OGG */
bits = alogg_get_wave_bits_ogg(oggfile);
stereo = alogg_get_wave_is_stereo_ogg(oggfile);
freq = alogg_get_wave_freq_ogg(oggfile);
alogg_destroy_ogg(oggfile); //This is no longer needed
oggfile = NULL;
samples = msec_to_samples(ms);
channels = stereo ? 2 : 1;
combined = create_sample(bits,stereo,freq,samples+decoded->len); //Create a sample array long enough for the silence and the OGG file
if(combined == NULL)
{
destroy_sample(decoded);
return 45; //Return failure: Could not create a sample array for the combined audio
}
/* Add the PCM data for the silence */
if(bits == 8)
{ //Create 8 bit PCM data
for(ctr=0,index=0;ctr < samples * channels;ctr++)
{
((unsigned char *)(combined->data))[index++] = 0x80;
}
}
else
{ //Create 16 bit PCM data
for(ctr=0,index=0;ctr < samples * channels;ctr++)
{
((unsigned short *)(combined->data))[index++] = 0x8000;
}
}
/* Add the decoded OGG PCM data*/
if(bits == 8)
{ //Copy 8 bit PCM data
for(ctr=0;ctr < decoded->len * channels;ctr++)
{
((unsigned char *)(combined->data))[index++] = ((unsigned char *)(decoded->data))[ctr];
}
}
else
{ //Copy 16 bit PCM data
for(ctr=0;ctr < decoded->len * channels;ctr++)
{
((unsigned short *)(combined->data))[index++] = ((unsigned short *)(decoded->data))[ctr];
}
}
/* encode the audio */
destroy_sample(decoded); //This is no longer needed
free(oggbuffer);
(void) replace_filename(wavfn, eof_song_path, "encode.wav", 1024);
(void) save_wav(wavfn, combined);
destroy_sample(combined); //This is no longer needed
(void) replace_filename(soggfn, eof_song_path, "encode.ogg", 1024);
bitrate = alogg_get_bitrate_ogg(eof_music_track) / 1000;
if(!bitrate)
{ //A user found that in an audio file with a really high sample rate (ie. 96KHz), alogg_get_bitrate_ogg() may return zero instead of an expected value
bitrate = 256; //In case this happens, use a bitrate of 256Kbps, which should be good enough for a very high quality file
}
#ifdef ALLEGRO_WINDOWS
(void) uszprintf(sys_command, (int) sizeof(sys_command) - 1, "oggenc2 -o \"%s\" -b %d \"%s\"", soggfn, bitrate, wavfn);
#else
(void) uszprintf(sys_command, (int) sizeof(sys_command) - 1, "oggenc -o \"%s\" -b %d \"%s\"", soggfn, bitrate, wavfn);
#endif
(void) snprintf(eof_log_string, sizeof(eof_log_string) - 1, "\tCalling oggenc as follows: %s", sys_command);
eof_log(eof_log_string, 1);
if(eof_system(sys_command))
{ //If oggenc failed, retry again by specifying a quality level (specifying bitrate can fail in some circumstances)
eof_log("\t\toggenc failed. Retrying by specifying a quality level instead of a target bitrate", 1);
#ifdef ALLEGRO_WINDOWS
(void) uszprintf(sys_command, (int) sizeof(sys_command) - 1, "oggenc2 -o \"%s\" -q 9 \"%s\"", soggfn, wavfn);
#else
(void) uszprintf(sys_command, (int) sizeof(sys_command) - 1, "oggenc -o \"%s\" -q 9 \"%s\"", soggfn, wavfn);
#endif
(void) snprintf(eof_log_string, sizeof(eof_log_string) - 1, "\tCalling oggenc as follows: %s", sys_command);
eof_log(eof_log_string, 1);
if(eof_system(sys_command))
{ //If oggenc failed again
char tempfname[30] = {0};
char redirect[35] = {0};
if(eof_validate_temp_folder())
{ //Ensure the correct working directory and presence of the temporary folder
eof_log("\tCould not validate working directory and temp folder", 1);
return 46; //Return failure: Could not validate cwd and temp folder
}
(void) snprintf(tempfname, sizeof(tempfname) - 1, "%soggenc.log", eof_temp_path_s);
(void) snprintf(redirect, sizeof(redirect) - 1, " 2> %s", tempfname);
(void) ustrzcat(sys_command, (int) sizeof(sys_command) - 1, redirect); //Append a redirection to the command to capture the output of oggenc
if(eof_system(sys_command))
{ //Run one last time to catch the error output
(void) snprintf(eof_log_string, sizeof(eof_log_string) - 1, "\tOggenc failed. Please see %s for any errors it gave.", tempfname);
eof_log(eof_log_string, 1);
eof_fix_window_title();
return 47; //Return failure: Could not encode combined audio
}
}
}
/* replace the current OGG file with the new file */
(void) eof_copy_file(soggfn, oggfn); //Copy encode.ogg to the filename of the original OGG
/* clean up */
(void) delete_file(soggfn); //Delete encode.ogg
(void) delete_file(wavfn); //Delete encode.wav
if(eof_load_ogg(oggfn, 0))
{ //If the combined audio was loaded
eof_fix_waveform_graph();
eof_fix_spectrogram();
eof_fix_window_title();
eof_chart_length = eof_music_length;
return 0; //Return success
}
eof_fix_window_title();
return 48; //Return error: Could not load new audio
}
struct wavestruct *eof_create_waveform(char *oggfilename, unsigned long slicelength)
{
ALOGG_OGG *oggstruct = NULL;
SAMPLE *audio = NULL;
void * oggbuffer = NULL;
struct wavestruct *waveform = NULL;
static struct wavestruct emptywaveform; //all variables in this auto initialize to value 0
char done = 0; //-1 on unsuccessful completion, 1 on successful completion
unsigned long slicenum = 0;
eof_log("\tGenerating waveform", 1);
eof_log("eof_create_waveform() entered", 1);
set_window_title("Generating Waveform Graph...");
if((oggfilename == NULL) || !slicelength)
{
eof_log("Waveform: Invalid parameters", 1);
return NULL;
}
//Load OGG file into memory
oggbuffer = eof_buffer_file(oggfilename, 0);
if(!oggbuffer)
{
(void) snprintf(eof_log_string, sizeof(eof_log_string) - 1, "Waveform: Failed to open input audio file: %s",strerror(errno));
eof_log(eof_log_string, 1);
return NULL;
}
oggstruct = alogg_create_ogg_from_buffer(oggbuffer, (int)file_size_ex(oggfilename));
if(oggstruct == NULL)
{
eof_log("Waveform: ALOGG failed to open input audio file", 1);
free(oggbuffer);
return NULL;
}
//Decode OGG into memory
audio = alogg_create_sample_from_ogg(oggstruct);
if(audio == NULL)
{
eof_log("Waveform: ALOGG failed to decode input audio file", 1);
done = -1;
}
else if((audio->bits != 8) && (audio->bits != 16)) //This logic currently only supports 8 and 16 bit audio
{
eof_log("Waveform: Invalid sample size", 1);
done = -1;
}
else
{
//Initialize waveform structure
waveform = (struct wavestruct *)malloc(sizeof(struct wavestruct));
if(waveform == NULL)
{
eof_log("Waveform: Unable to allocate memory for the waveform structure", 1);
done = -1;
}
else
{
*waveform = emptywaveform; //Set all variables to value zero
waveform->slicelength = slicelength;
if(alogg_get_wave_is_stereo_ogg(oggstruct)) //If this audio file has two audio channels
waveform->is_stereo = 1;
else
waveform->is_stereo = 0;
if(audio->bits == 8)
waveform->zeroamp = 128; //128 represents amplitude 0 for unsigned 8 bit audio samples
else
waveform->zeroamp = 32768; //32768 represents amplitude 0 for unsigned 16 bit audio samples
waveform->oggfilename = (char *)malloc(strlen(oggfilename)+1);
if(waveform->oggfilename == NULL)
{
eof_log("Waveform: Unable to allocate memory for the audio filename string", 1);
done = -1;
}
else
{
waveform->slicesize = audio->freq * slicelength / 1000; //Find the number of samples in each slice
if((audio->freq * slicelength) % 1000) //If there was any remainder
waveform->slicesize++; //Increment the size of the slice
waveform->numslices = (double)audio->len / ((double)audio->freq * (double)slicelength / 1000.0); //Find the number of slices to process
if(audio->len % waveform->numslices) //If there's any remainder
waveform->numslices++; //Increment the number of slices
strcpy(waveform->oggfilename,oggfilename);
waveform->left.slices = (struct waveformslice *)malloc(sizeof(struct waveformslice) * waveform->numslices);
if(waveform->left.slices == NULL)
{
eof_log("Waveform: Unable to allocate memory for the left channel waveform data", 1);
done = -1;
}
else if(waveform->is_stereo) //If this OGG is stereo
{ //Allocate memory for the right channel waveform data
waveform->right.slices = (struct waveformslice *)malloc(sizeof(struct waveformslice) * waveform->numslices);
if(waveform->right.slices == NULL)
{
eof_log("Waveform: Unable to allocate memory for the right channel waveform data", 1);
done = -1;
}
}
}
}
}
while(!done)
{
done = eof_process_next_waveform_slice(waveform, audio, slicenum++);
}
//Cleanup
if(oggstruct != NULL)
alogg_destroy_ogg(oggstruct);
if(audio != NULL)
destroy_sample(audio);
if(oggbuffer)
free(oggbuffer);
if(done == -1) //Unsuccessful completion
{
if(waveform)
{
if(waveform->oggfilename)
free(waveform->oggfilename);
free(waveform);
}
allegro_message("Failed to generate waveform. See log for details");
return NULL; //Return error
}
//Cache the difference between each channel's zero amplitude and its maximum amplitude for optimized rendering
if(waveform->left.maxamp > waveform->zeroamp)
waveform->left.maxampoffset = waveform->left.maxamp - waveform->zeroamp;
else
waveform->left.maxampoffset = waveform->zeroamp - waveform->left.maxamp;
if(waveform->is_stereo)
{ //If there is right channel waveform data
if(waveform->right.maxamp > waveform->zeroamp)
waveform->right.maxampoffset = waveform->right.maxamp - waveform->zeroamp;
else
waveform->right.maxampoffset = waveform->zeroamp - waveform->right.maxamp;
}
eof_log("\tWaveform generated", 1);
return waveform; //Return waveform data
}