misc/libopenalbridge/loaders.c
author unc0rr
Mon, 16 May 2011 22:08:28 +0400
branchcursor_issues
changeset 5193 16eda3643fc3
parent 3514 59dbd31e9953
permissions -rw-r--r--
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/*
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* OpenAL Bridge - a simple portable library for OpenAL interface
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* Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include "loaders.h"
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#include "wrappers.h"
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#include "vorbis/vorbisfile.h"
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#include "openalbridge_t.h"
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int load_wavpcm (const char *filename, ALenum *format, char **data, ALsizei *bitsize, ALsizei *freq) {
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    WAV_header_t WAVHeader;
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    FILE *wavfile;
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    int32_t t;
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    uint32_t n = 0;
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    uint8_t sub0, sub1, sub2, sub3;
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    wavfile = Fopen(filename, "rb");
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    fread(&WAVHeader.ChunkID, sizeof(uint32_t), 1, wavfile);                /*RIFF*/
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    fread(&WAVHeader.ChunkSize, sizeof(uint32_t), 1, wavfile);
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    fread(&WAVHeader.Format, sizeof(uint32_t), 1, wavfile);                 /*WAVE*/
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#ifdef DEBUG
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    fprintf(stderr, "ChunkID: %X\n", ENDIAN_BIG_32(WAVHeader.ChunkID));
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    fprintf(stderr, "ChunkSize: %d\n", ENDIAN_LITTLE_32(WAVHeader.ChunkSize));
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    fprintf(stderr, "Format: %X\n", ENDIAN_BIG_32(WAVHeader.Format));
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#endif
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    fread(&WAVHeader.Subchunk1ID, sizeof(uint32_t), 1, wavfile);            /*fmt */
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    fread(&WAVHeader.Subchunk1Size, sizeof(uint32_t), 1, wavfile);
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    fread(&WAVHeader.AudioFormat, sizeof(uint16_t), 1, wavfile);
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    fread(&WAVHeader.NumChannels, sizeof(uint16_t), 1, wavfile);
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    fread(&WAVHeader.SampleRate, sizeof(uint32_t), 1, wavfile);
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    fread(&WAVHeader.ByteRate, sizeof(uint32_t), 1, wavfile);
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    fread(&WAVHeader.BlockAlign, sizeof(uint16_t), 1, wavfile);
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    fread(&WAVHeader.BitsPerSample, sizeof(uint16_t), 1, wavfile);
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#ifdef DEBUG
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    fprintf(stderr, "Subchunk1ID: %X\n", ENDIAN_BIG_32(WAVHeader.Subchunk1ID));
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    fprintf(stderr, "Subchunk1Size: %d\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk1Size));
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    fprintf(stderr, "AudioFormat: %d\n", ENDIAN_LITTLE_16(WAVHeader.AudioFormat));
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    fprintf(stderr, "NumChannels: %d\n", ENDIAN_LITTLE_16(WAVHeader.NumChannels));
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    fprintf(stderr, "SampleRate: %d\n", ENDIAN_LITTLE_32(WAVHeader.SampleRate));
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    fprintf(stderr, "ByteRate: %d\n", ENDIAN_LITTLE_32(WAVHeader.ByteRate));
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    fprintf(stderr, "BlockAlign: %d\n", ENDIAN_LITTLE_16(WAVHeader.BlockAlign));
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    fprintf(stderr, "BitsPerSample: %d\n", ENDIAN_LITTLE_16(WAVHeader.BitsPerSample));
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#endif
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    /*remove useless header chunks by looking for the WAV_HEADER_SUBCHUNK2ID integer */
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    do {
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        t = fread(&sub0, sizeof(uint8_t), 1, wavfile);
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        if(sub0 == 0x64) {
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            t = fread(&sub1, sizeof(uint8_t), 1, wavfile);
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            if(sub1 == 0x61) {
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                t = fread(&sub2, sizeof(uint8_t), 1, wavfile);
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                if(sub2 == 0x74) {
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                    t = fread(&sub3, sizeof(uint8_t), 1, wavfile);
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                    if(sub3 == 0x61) {
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                        WAVHeader.Subchunk2ID = WAV_HEADER_SUBCHUNK2ID;
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                        break;
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                    }
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                }
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            }
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        }
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        if (t <= 0) {
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            // eof
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            fprintf(stderr,"(Bridge Error) - wrong WAV header\n");
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            return -1;
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        }
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    } while (1);
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    fread(&WAVHeader.Subchunk2Size, sizeof(uint32_t), 1, wavfile);
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#ifdef DEBUG
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    fprintf(stderr, "Subchunk2ID: %X\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk2ID));
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    fprintf(stderr, "Subchunk2Size: %d\n", ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
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#endif
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    *data = (char*) Malloc (sizeof(char) * ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
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    /*read the actual sound data*/
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    do {
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        n += fread(&((*data)[n]), sizeof(uint8_t), 4, wavfile);
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    } while (n < ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size));
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    fclose(wavfile);
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#ifdef DEBUG
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    fprintf(stderr,"(Bridge Info) - WAV data loaded\n");
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#endif
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    /*set parameters for OpenAL*/
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    /*Valid formats are AL_FORMAT_MONO8, AL_FORMAT_MONO16, AL_FORMAT_STEREO8, and AL_FORMAT_STEREO16*/
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    if (ENDIAN_LITTLE_16(WAVHeader.NumChannels) == 1) {
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        if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 8)
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            *format = AL_FORMAT_MONO8;
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        else {
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            if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 16)
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                *format = AL_FORMAT_MONO16;
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            else {
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                fprintf(stderr,"(Bridge Error) - wrong WAV header [bitsample value]\n");
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                return -2;
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            }
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        }
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    } else {
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        if (ENDIAN_LITTLE_16(WAVHeader.NumChannels) == 2) {
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            if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 8)
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                *format = AL_FORMAT_STEREO8;
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            else {
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                if (ENDIAN_LITTLE_16(WAVHeader.BitsPerSample) == 16)
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                    *format = AL_FORMAT_STEREO16;
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                else {
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                    fprintf(stderr,"(Bridge Error) - wrong WAV header [bitsample value]\n");
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                    return -2;
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                }
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            }
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        } else {
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            fprintf(stderr,"(Bridge Error) - wrong WAV header [format value]\n");
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            return -2;
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        }
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    }
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    *bitsize = ENDIAN_LITTLE_32(WAVHeader.Subchunk2Size);
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    *freq    = ENDIAN_LITTLE_32(WAVHeader.SampleRate);
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    return 0;
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}
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int load_oggvorbis (const char *filename, ALenum *format, char **data, ALsizei *bitsize, ALsizei *freq) {
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    /*implementation inspired from http://www.devmaster.net/forums/showthread.php?t=1153 */
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    /*ogg handle*/
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    FILE *oggFile;
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    /*stream handle*/
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    OggVorbis_File oggStream;
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    /*some formatting data*/
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    vorbis_info *vorbisInfo;
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    /*length of the decoded data*/
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    int64_t pcm_length;
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    /*other vars*/
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    int section, result, size, endianness;
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#ifdef DEBUG
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    int i;
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    /*other less useful data*/
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    vorbis_comment *vorbisComment;
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#endif
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    oggFile = Fopen(filename, "rb");
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    result = ov_open_callbacks(oggFile, &oggStream, NULL, 0, OV_CALLBACKS_DEFAULT);
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    if (result < 0) {
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        fprintf(stderr,"(Bridge Error) - ov_open_callbacks() failed with %X\n", result);
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        ov_clear(&oggStream);
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        return -1;
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    }
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    /*load OGG header and determine the decoded data size*/
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    vorbisInfo = ov_info(&oggStream, -1);
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    pcm_length = ov_pcm_total(&oggStream, -1) << vorbisInfo->channels;
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#ifdef DEBUG
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    vorbisComment = ov_comment(&oggStream, -1);
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    fprintf(stderr, "Version: %d\n", vorbisInfo->version);
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    fprintf(stderr, "Channels: %d\n", vorbisInfo->channels);
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    fprintf(stderr, "Rate (Hz): %ld\n", vorbisInfo->rate);
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    fprintf(stderr, "Bitrate Upper: %ld\n", vorbisInfo->bitrate_upper);
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    fprintf(stderr, "Bitrate Nominal: %ld\n", vorbisInfo->bitrate_nominal);
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    fprintf(stderr, "Bitrate Lower: %ld\n", vorbisInfo->bitrate_lower);
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    fprintf(stderr, "Bitrate Windows: %ld\n", vorbisInfo->bitrate_window);
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    fprintf(stderr, "Vendor: %s\n", vorbisComment->vendor);
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    fprintf(stderr, "PCM data size: %lld\n", pcm_length);
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    fprintf(stderr, "# comment: %d\n", vorbisComment->comments);
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    for (i = 0; i < vorbisComment->comments; i++)
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        fprintf(stderr, "\tComment %d: %s\n", i, vorbisComment->user_comments[i]);
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#endif
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    /*allocates enough room for the decoded data*/
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    *data = (char*) Malloc (sizeof(char) * pcm_length);
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    /*there *should* not be ogg at 8 bits*/
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    if (vorbisInfo->channels == 1)
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        *format = AL_FORMAT_MONO16;
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    else {
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        if (vorbisInfo->channels == 2)
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            *format = AL_FORMAT_STEREO16;
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        else {
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            fprintf(stderr,"(Bridge Error) - wrong OGG header [channel %d]\n", vorbisInfo->channels);
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            ov_clear(&oggStream);
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            return -2;
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        }
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    }
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    size = 0;
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#ifdef __LITTLE_ENDIAN__
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    endianness = 0;
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#elif __BIG_ENDIAN__
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    endianness = 1;
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#endif
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    while (size < pcm_length) {
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        /*ov_read decodes the ogg stream and storse the pcm in data*/
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        result = ov_read (&oggStream, *data + size, pcm_length - size, endianness, 2, 1, &section);
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        if (result > 0) {
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            size += result;
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   219
        } else {
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            if (result == 0)
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                break;
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            else {
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                fprintf(stderr,"(Bridge Error) - End of file from OGG stream\n");
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                ov_clear(&oggStream);
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                return -3;
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   226
            }
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        }
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    }
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    /*set the last fields*/
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   231
    *bitsize = size;
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   232
    *freq = vorbisInfo->rate;
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    /*cleaning time (ov_clear also closes file handler)*/
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   235
    ov_clear(&oggStream);
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   236
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   237
    return 0;
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   238
}