+++ /dev/null
-
-#include "quakedef.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "wavefile.h"
-
-wavefile_t *waveopen(char *filename, char **errorstring)
-{
- int validfmt, position, length, l;
- char *error;
- wavefile_t *w;
- qfile_t *file;
- unsigned char buffer[1024];
- error = NULL;
- file = FS_Open (filename, "rb", true);
- if (file)
- {
- w = malloc(sizeof(*w));
- memset(w, 0, sizeof(*w));
- if (w)
- {
- w->file = file;
- if (FS_Read (w->file, buffer, 12))
- {
- if (!memcmp(buffer, "RIFF", 4))
- {
- if (!memcmp(buffer + 8, "WAVE", 4))
- {
- validfmt = 0;
- for(;;)
- {
- if (!FS_Read(w->file, buffer, 8))
- {
- //error = "error reading chunk\n");
- break;
- }
- position = FS_Tell(w->file);
- length = buffer[4] | (buffer[5] << 8) | (buffer[6] << 16) | (buffer[7] << 24);
- if (!memcmp(buffer, "fmt ", 4))
- {
- validfmt = 0;
- l = length;
- if (l > 16)
- l = 16;
- if (!FS_Read(w->file, buffer, l))
- {
- error = "error reading \"fmt \" chunk\n";
- break;
- }
- w->info_format = buffer[0] | (buffer[1] << 8);
- if (w->info_format != 1)
- {
- error = "only PCM format supported\n";
- break;
- }
- w->info_channels = buffer[2] | (buffer[3] << 8);
- if (w->info_channels != 1 && w->info_channels != 2)
- {
- error = "only mono and stereo supported\n";
- break;
- }
- w->info_rate = buffer[4] | (buffer[5] << 8) | (buffer[6] << 16) | (buffer[7] << 24);
- if (w->info_rate < 1)
- {
- error = "only rates 1hz-100khz supported\n";
- break;
- }
- w->info_bits = buffer[14] | (buffer[15] << 8);
- if (w->info_bits != 8 && w->info_bits != 16)
- {
- error = "only 8bit and 16bit supported\n";
- break;
- }
- validfmt = 1;
- }
- else if (!memcmp(buffer, "data", 4))
- {
- if (validfmt)
- {
- w->datalength = length;
- w->dataposition = position;
- }
- }
- // other chunks that might be of interest:
- // "cue " (for looping)
- if (FS_Seek(w->file, position + length, SEEK_SET))
- {
- error = "error seeking to next chunk\n";
- break;
- }
- }
- if (w->datalength && validfmt)
- {
- w->info_bytesperchannel = w->info_bits / 8;
- w->info_bytespersample = w->info_channels * w->info_bytesperchannel;
- w->length = w->datalength / w->info_bytespersample;
- w->position = 0;
- FS_Seek(w->file, w->dataposition, SEEK_SET);
- return w;
- }
- }
- else
- error = "not a RIFF WAVE file\n";
- }
- else
- error = "not a RIFF file\n";
- }
- else
- error = "error reading file\n";
- free(w);
- }
- else
- error = "unable to allocate memory\n";
- FS_Close(file);
- }
- else
- error = "unable to open file\n";
- if (errorstring)
- *errorstring = error;
- return NULL;
-}
-
-void waveclose(wavefile_t *f)
-{
- if (f)
- {
- FS_Close(f->file);
- free(f);
- }
-}
-
-unsigned int waveread16stereo(wavefile_t *w, short *soundbuffer, unsigned int samples)
-{
- unsigned int i;
- unsigned int length;
- unsigned char *in;
- short *out;
- length = samples;
- if (length > w->length - w->position)
- length = w->length - w->position;
- if (w->bufferlength < length)
- {
- if (w->buffer)
- free(w->buffer);
- w->bufferlength = length + 100;
- w->buffer = malloc(w->bufferlength * w->info_bytespersample);
- }
- length = FS_Read(w->file, w->buffer, w->info_bytespersample * length) / w->info_bytespersample;
- w->position += length;
- if (length > 0)
- {
- if (w->info_bytesperchannel == 2)
- {
- if (w->info_channels == 2)
- {
- for (i = 0, in = w->buffer, out = soundbuffer;i < length;i++, in += 4, out += 2)
- {
- out[0] = in[0] | (in[1] << 8);
- out[1] = in[2] | (in[3] << 8);
- }
- }
- else
- for (i = 0, in = w->buffer, out = soundbuffer;i < length;i++, in += 2, out += 2)
- out[0] = out[1] = in[0] | (in[1] << 8);
- }
- else
- {
- if (w->info_channels == 2)
- {
- for (i = 0, in = w->buffer, out = soundbuffer;i < length;i++, in += 2, out += 2)
- {
- out[0] = (in[0] - 128) << 8;
- out[1] = (in[1] - 128) << 8;
- }
- }
- else
- for (i = 0, in = w->buffer, out = soundbuffer;i < length;i++, in += 1, out += 2)
- out[0] = out[1] = (in[0] - 128) << 8;
- }
- }
- return length;
-}
-
-unsigned int waveseek(wavefile_t *w, unsigned int samples)
-{
- if (samples > w->datalength)
- return 1;
- else
- {
- w->position = samples;
- FS_Seek(w->file, w->dataposition + w->position * w->info_bytespersample, SEEK_SET);
- return 0;
- }
-}
+++ /dev/null
-
-#ifndef WAVEFILE_H
-#define WAVEFILE_H
-
-#include "quakedef.h"
-
-typedef struct wavefile_s
-{
- // file this is reading from
- qfile_t *file;
-
- // these settings are read directly from the wave format
- // 1 is uncompressed PCM
- unsigned int info_format;
- // how many samples per second
- unsigned int info_rate;
- // how many channels (1 = mono, 2 = stereo, 6 = 5.1 audio?)
- unsigned int info_channels;
- // how many bits per channel (8 or 16)
- unsigned int info_bits;
-
- // these settings are generated from the wave format
- // how many bytes in a sample (which may be one or two channels, thus 1 or 2 or 2 or 4, depending on info_bytesperchannel)
- unsigned int info_bytespersample;
- // how many bytes in channel (1 for 8bit, or 2 for 16bit)
- unsigned int info_bytesperchannel;
-
- // how many samples in the wave file
- unsigned int length;
-
- // how large the data chunk is
- unsigned int datalength;
- // beginning of data in data chunk
- unsigned int dataposition;
-
- // current position in stream (in samples)
- unsigned int position;
-
- // these are private to the wave file functions, just used for processing
- // size of *buffer
- unsigned int bufferlength;
- // buffer is reallocated if caller asks for more than fits
- void *buffer;
-
-}
-wavefile_t;
-
-// opens a wave file, if an error occurs and errorstring is not NULL,
-// *errorstring will be set to a message describing the error
-wavefile_t *waveopen(char *filename, char **errorstring);
-// closes a wave file
-void waveclose(wavefile_t *f);
-
-// reads some data from the file as 16bit stereo (converting if necessary)
-// returns number of samples read (may be less than requested)
-// if not all samples could be read, the remaining buffer will be unmodified
-unsigned int waveread16stereo(wavefile_t *f, short *soundbuffer, unsigned int samples);
-
-// seeks to a desired position in the wave
-// returns 0 if successful, 1 if not successful
-unsigned int waveseek(wavefile_t *f, unsigned int samples);
-
-#endif
projects / xonotic / darkplaces.git / commitdiff