ref: f0f45dfd92adfe3c02a984a9164aaa2b0c3fae7b
parent: caabc05d2dc01650477aa35ad7fe4a964d9173ab
author: knik <knik>
date: Sat Nov 23 12:39:14 EST 2002
libsndfile replacement
--- /dev/null
+++ b/frontend/input.c
@@ -1,0 +1,153 @@
+/*
+ * FAAC - Freeware Advanced Audio Coder
+ * Copyright (C) 2002 Krzysztof Nikiel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * $Id: input.c,v 1.1 2002/11/23 17:39:14 knik Exp $
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef WIN32
+#include <fcntl.h>
+#endif
+
+#include "input.h"
+
+typedef unsigned long u_long;
+typedef unsigned short u_short;
+
+typedef struct
+{+ u_long label; /* 'RIFF' */
+ u_long length; /* Length of rest of file */
+ u_long chunk_type; /* 'WAVE' */
+}
+riff_t;
+
+typedef struct
+{+ u_long label;
+ u_long len;
+}
+riffsub_t;
+
+#define WAVE_FORMAT_PCM 1
+typedef struct
+{+ u_short wFormatTag;
+ u_short nChannels;
+ u_long nSamplesPerSec;
+ u_long nAvgBytesPerSec;
+ u_short nBlockAlign;
+ u_short wBitsPerSample;
+ u_short cbSize;
+}
+WAVEFORMATEX;
+
+pcmfile_t *wav_open_read(const char *name)
+{+ int i;
+ int skip;
+ FILE *wave_f;
+ riff_t riff;
+ riffsub_t riffsub;
+ WAVEFORMATEX wave;
+ char *riffl = "RIFF";
+ char *wavel = "WAVE";
+ char *fmtl = "fmt ";
+ char *datal = "data";
+ int fmtsize;
+ pcmfile_t *sndf;
+
+ if (!strcmp(name, "-"))
+ {+#ifdef WIN32
+ setmode(fileno(stdin), O_BINARY);
+#endif
+ wave_f = stdin;
+ }
+ else if (!(wave_f = fopen(name, "rb")))
+ {+ perror(name);
+ return NULL;
+ }
+
+ if (fread(&riff, 1, sizeof(riff), wave_f) != sizeof(riff))
+ return NULL;
+ if (memcmp(&(riff.label), riffl, 4))
+ return NULL;
+ if (memcmp(&(riff.chunk_type), wavel, 4))
+ return NULL;
+
+ if (fread(&riffsub, 1, sizeof(riffsub), wave_f) != sizeof(riffsub))
+ return NULL;
+ if (memcmp(&(riffsub.label), fmtl, 4))
+ return NULL;
+ memset(&wave, 0, sizeof(wave));
+ fmtsize = (riffsub.len < sizeof(wave)) ? riffsub.len : sizeof(wave);
+ if (fread(&wave, 1, fmtsize, wave_f) != fmtsize)
+ return NULL;
+
+ for (skip = riffsub.len - fmtsize; skip > 0; skip--)
+ fgetc(wave_f);
+
+ for (i = 0;; i++)
+ {+ if (fread(&riffsub, 1, sizeof(riffsub), wave_f) != sizeof(riffsub))
+ return NULL;
+ if (!memcmp(&(riffsub.label), datal, 4))
+ break;
+ if (i > 10)
+ return NULL;
+
+ for (skip = riffsub.len; skip > 0; skip--)
+ fgetc(wave_f);
+ }
+ if (wave.wFormatTag != WAVE_FORMAT_PCM)
+ return NULL;
+
+ sndf = malloc(sizeof(*sndf));
+ sndf->f = wave_f;
+ sndf->channels = wave.nChannels;
+ sndf->samplebits = wave.wBitsPerSample;
+ sndf->samplerate = wave.nSamplesPerSec;
+ sndf->samples = riffsub.len /
+ (((wave.wBitsPerSample > 8) ? 2 : 1) * wave.nChannels);
+ return sndf;
+}
+
+size_t wav_read_short(pcmfile_t *sndf, short *buf, size_t num)
+{+ int size;
+ int i;
+
+ if (sndf->samplebits > 8)
+ return fread(buf, 2, num, sndf->f);
+
+ // convert to 16 bit
+ size = fread(buf, 1, num, sndf->f);
+ for (i = size - 1; i >= 0; i--)
+ buf[i] = (((char *)buf)[i] - 128) * 256;
+ return size;
+}
+
+int wav_close(pcmfile_t *sndf)
+{+ int i = fclose(sndf->f);
+ free(sndf);
+ return i;
+}
--- /dev/null
+++ b/frontend/input.h
@@ -1,0 +1,49 @@
+/*
+ * FAAC - Freeware Advanced Audio Coder
+ * Copyright (C) 2002 Krzysztof Nikiel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * $Id: input.h,v 1.1 2002/11/23 17:39:14 knik Exp $
+ */
+
+#ifndef _INPUT_H
+#define _INPUT_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C"
+{+#endif
+
+typedef struct
+{+ FILE *f;
+ int channels;
+ int samplebits;
+ int samplerate;
+ int samples;
+} pcmfile_t;
+
+pcmfile_t *wav_open_read(const char *path);
+size_t wav_read_short(pcmfile_t *file, short *ptr, size_t size);
+int wav_close(pcmfile_t *file);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _INPUT_H */