misc/libopenalbridge/loaders.c
changeset 3514 59dbd31e9953
parent 3513 f589230fa21b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libopenalbridge/loaders.c	Thu Jun 17 20:30:39 2010 +0200
@@ -0,0 +1,238 @@
+/*
+* OpenAL Bridge - a simple portable library for OpenAL interface
+* Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
+*
+* This program 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; version 2 of the License
+*
+* This program 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 program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+*/
+
+#include "loaders.h"
+#include "wrappers.h"
+#include "vorbis/vorbisfile.h"
+#include "openalbridge_t.h"
+
+
+int load_wavpcm (const char *filename, ALenum *format, char **data, ALsizei *bitsize, ALsizei *freq) {
+    WAV_header_t WAVHeader;
+    FILE *wavfile;
+    int32_t t;
+    uint32_t n = 0;
+    uint8_t sub0, sub1, sub2, sub3;
+
+    wavfile = Fopen(filename, "rb");
+
+    fread(&WAVHeader.ChunkID, sizeof(uint32_t), 1, wavfile);                /*RIFF*/
+    fread(&WAVHeader.ChunkSize, sizeof(uint32_t), 1, wavfile);
+    fread(&WAVHeader.Format, sizeof(uint32_t), 1, wavfile);                 /*WAVE*/
+
+#ifdef DEBUG
+    fprintf(stderr, "ChunkID: %X\n", ENDIAN_BIG_32(WAVHeader.ChunkID));
+    fprintf(stderr, "ChunkSize: %d\n", ENDIAN_LITTLE_32(WAVHeader.ChunkSize));
+    fprintf(stderr, "Format: %X\n", ENDIAN_BIG_32(WAVHeader.Format));
+#endif
+
+    fread(&WAVHeader.Subchunk1ID, sizeof(uint32_t), 1, wavfile);            /*fmt */
+    fread(&WAVHeader.Subchunk1Size, sizeof(uint32_t), 1, wavfile);
+    fread(&WAVHeader.AudioFormat, sizeof(uint16_t), 1, wavfile);
+    fread(&WAVHeader.NumChannels, sizeof(uint16_t), 1, wavfile);
+    fread(&WAVHeader.SampleRate, sizeof(uint32_t), 1, wavfile);
+    fread(&WAVHeader.ByteRate, sizeof(uint32_t), 1, wavfile);
+    fread(&WAVHeader.BlockAlign, sizeof(uint16_t), 1, wavfile);
+    fread(&WAVHeader.BitsPerSample, sizeof(uint16_t), 1, wavfile);
+
+#ifdef DEBUG
+    fprintf(stderr, "Subchunk1ID: %X\n", ENDIAN_BIG_32(WAVHeader.Subchunk1ID));
+    fprintf(stderr, "Subchunk1Size: %d\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk1Size));
+    fprintf(stderr, "AudioFormat: %d\n", ENDIAN_LITTLE_16(WAVHeader.AudioFormat));
+    fprintf(stderr, "NumChannels: %d\n", ENDIAN_LITTLE_16(WAVHeader.NumChannels));
+    fprintf(stderr, "SampleRate: %d\n", ENDIAN_LITTLE_32(WAVHeader.SampleRate));
+    fprintf(stderr, "ByteRate: %d\n", ENDIAN_LITTLE_32(WAVHeader.ByteRate));
+    fprintf(stderr, "BlockAlign: %d\n", ENDIAN_LITTLE_16(WAVHeader.BlockAlign));
+    fprintf(stderr, "BitsPerSample: %d\n", ENDIAN_LITTLE_16(WAVHeader.BitsPerSample));
+#endif
+
+    /*remove useless header chunks by looking for the WAV_HEADER_SUBCHUNK2ID integer */
+    do {
+        t = fread(&sub0, sizeof(uint8_t), 1, wavfile);
+        if(sub0 == 0x64) {
+            t = fread(&sub1, sizeof(uint8_t), 1, wavfile);
+            if(sub1 == 0x61) {
+                t = fread(&sub2, sizeof(uint8_t), 1, wavfile);
+                if(sub2 == 0x74) {
+                    t = fread(&sub3, sizeof(uint8_t), 1, wavfile);
+                    if(sub3 == 0x61) {
+                        WAVHeader.Subchunk2ID = WAV_HEADER_SUBCHUNK2ID;
+                        break;
+                    }
+                }
+            }
+        }
+
+        if (t <= 0) {
+            // eof
+            fprintf(stderr,"(Bridge Error) - wrong WAV header\n");
+            return -1;
+        }
+    } while (1);
+
+    fread(&WAVHeader.Subchunk2Size, sizeof(uint32_t), 1, wavfile);
+
+#ifdef DEBUG
+    fprintf(stderr, "Subchunk2ID: %X\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk2ID));
+    fprintf(stderr, "Subchunk2Size: %d\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
+#endif
+
+    *data = (char*) Malloc (sizeof(char) * ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
+
+    /*read the actual sound data*/
+    do {
+        n += fread(&((*data)[n]), sizeof(uint8_t), 4, wavfile);
+    } while (n < ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
+
+    fclose(wavfile);
+
+#ifdef DEBUG
+    fprintf(stderr,"(Bridge Info) - WAV data loaded\n");
+#endif
+
+    /*set parameters for OpenAL*/
+    /*Valid formats are AL_FORMAT_MONO8, AL_FORMAT_MONO16, AL_FORMAT_STEREO8, and AL_FORMAT_STEREO16*/
+    if (ENDIAN_LITTLE_16(WAVHeader.NumChannels) == 1) {
+        if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 8)
+            *format = AL_FORMAT_MONO8;
+        else {
+            if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 16)
+                *format = AL_FORMAT_MONO16;
+            else {
+                fprintf(stderr,"(Bridge Error) - wrong WAV header [bitsample value]\n");
+                return -2;
+            }
+        }
+    } else {
+        if (ENDIAN_LITTLE_16(WAVHeader.NumChannels) == 2) {
+            if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 8)
+                *format = AL_FORMAT_STEREO8;
+            else {
+                if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 16)
+                    *format = AL_FORMAT_STEREO16;
+                else {
+                    fprintf(stderr,"(Bridge Error) - wrong WAV header [bitsample value]\n");
+                    return -2;
+                }
+            }
+        } else {
+            fprintf(stderr,"(Bridge Error) - wrong WAV header [format value]\n");
+            return -2;
+        }
+    }
+
+    *bitsize = ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size);
+    *freq    = ENDIAN_LITTLE_32(WAVHeader.SampleRate);
+    return 0;
+}
+
+
+int load_oggvorbis (const char *filename, ALenum *format, char **data, ALsizei *bitsize, ALsizei *freq) {
+    /*implementation inspired from http://www.devmaster.net/forums/showthread.php?t=1153 */
+
+    /*ogg handle*/
+    FILE *oggFile;
+    /*stream handle*/
+    OggVorbis_File oggStream;
+    /*some formatting data*/
+    vorbis_info *vorbisInfo;
+    /*length of the decoded data*/
+    int64_t pcm_length;
+    /*other vars*/
+    int section, result, size, endianness;
+#ifdef DEBUG
+    int i;
+    /*other less useful data*/
+    vorbis_comment *vorbisComment;
+#endif
+
+    oggFile = Fopen(filename, "rb");
+    result = ov_open_callbacks(oggFile, &oggStream, NULL, 0, OV_CALLBACKS_DEFAULT);
+    if (result < 0) {
+        fprintf(stderr,"(Bridge Error) - ov_open_callbacks() failed with %X\n", result);
+        ov_clear(&oggStream);
+        return -1;
+    }
+
+    /*load OGG header and determine the decoded data size*/
+    vorbisInfo = ov_info(&oggStream, -1);
+    pcm_length = ov_pcm_total(&oggStream, -1) << vorbisInfo->channels;
+
+#ifdef DEBUG
+    vorbisComment = ov_comment(&oggStream, -1);
+    fprintf(stderr, "Version: %d\n", vorbisInfo->version);
+    fprintf(stderr, "Channels: %d\n", vorbisInfo->channels);
+    fprintf(stderr, "Rate (Hz): %ld\n", vorbisInfo->rate);
+    fprintf(stderr, "Bitrate Upper: %ld\n", vorbisInfo->bitrate_upper);
+    fprintf(stderr, "Bitrate Nominal: %ld\n", vorbisInfo->bitrate_nominal);
+    fprintf(stderr, "Bitrate Lower: %ld\n", vorbisInfo->bitrate_lower);
+    fprintf(stderr, "Bitrate Windows: %ld\n", vorbisInfo->bitrate_window);
+    fprintf(stderr, "Vendor: %s\n", vorbisComment->vendor);
+    fprintf(stderr, "PCM data size: %lld\n", pcm_length);
+    fprintf(stderr, "# comment: %d\n", vorbisComment->comments);
+    for (i = 0; i < vorbisComment->comments; i++)
+        fprintf(stderr, "\tComment %d: %s\n", i, vorbisComment->user_comments[i]);
+#endif
+
+    /*allocates enough room for the decoded data*/
+    *data = (char*) Malloc (sizeof(char) * pcm_length);
+
+    /*there *should* not be ogg at 8 bits*/
+    if (vorbisInfo->channels == 1)
+        *format = AL_FORMAT_MONO16;
+    else {
+        if (vorbisInfo->channels == 2)
+            *format = AL_FORMAT_STEREO16;
+        else {
+            fprintf(stderr,"(Bridge Error) - wrong OGG header [channel %d]\n", vorbisInfo->channels);
+            ov_clear(&oggStream);
+            return -2;
+        }
+    }
+
+    size = 0;
+#ifdef __LITTLE_ENDIAN__
+    endianness = 0;
+#elif __BIG_ENDIAN__
+    endianness = 1;
+#endif
+    while (size < pcm_length) {
+        /*ov_read decodes the ogg stream and storse the pcm in data*/
+        result = ov_read (&oggStream, *data + size, pcm_length - size, endianness, 2, 1, &section);
+        if (result > 0) {
+            size += result;
+        } else {
+            if (result == 0)
+                break;
+            else {
+                fprintf(stderr,"(Bridge Error) - End of file from OGG stream\n");
+                ov_clear(&oggStream);
+                return -3;
+            }
+        }
+    }
+
+    /*set the last fields*/
+    *bitsize = size;
+    *freq = vorbisInfo->rate;
+
+    /*cleaning time (ov_clear also closes file handler)*/
+    ov_clear(&oggStream);
+
+    return 0;
+}