diff options
Diffstat (limited to 'src/audio.c')
| -rw-r--r-- | src/audio.c | 190 |
1 files changed, 188 insertions, 2 deletions
diff --git a/src/audio.c b/src/audio.c index 1e68c4a3..5904d9ca 100644 --- a/src/audio.c +++ b/src/audio.c @@ -35,6 +35,8 @@ #include <stdlib.h> // To use exit() function #include <stdio.h> // Used for .WAV loading +#include "utils.h" // rRES data decompression utility function + //#include "stb_vorbis.h" // TODO: OGG loading functions //---------------------------------------------------------------------------------- @@ -52,8 +54,7 @@ typedef struct Wave { unsigned int sampleRate; unsigned int dataSize; short bitsPerSample; - short channels; - short format; + short channels; } Wave; //---------------------------------------------------------------------------------- @@ -179,6 +180,159 @@ Sound LoadSound(char *fileName) return sound; } +// Load sound to memory from rRES file (raylib Resource) +Sound LoadSoundFromRES(const char *rresName, int resId) +{ + // NOTE: rresName could be directly a char array with all the data!!! --> TODO + Sound sound; + bool found = false; + + char id[4]; // rRES file identifier + unsigned char version; // rRES file version and subversion + char useless; // rRES header reserved data + short numRes; + + ResInfoHeader infoHeader; + + FILE *rresFile = fopen(rresName, "rb"); + + if (!rresFile) printf("Error opening raylib Resource file\n"); + + // Read rres file (basic file check - id) + fread(&id[0], sizeof(char), 1, rresFile); + fread(&id[1], sizeof(char), 1, rresFile); + fread(&id[2], sizeof(char), 1, rresFile); + fread(&id[3], sizeof(char), 1, rresFile); + fread(&version, sizeof(char), 1, rresFile); + fread(&useless, sizeof(char), 1, rresFile); + + if ((id[0] != 'r') && (id[1] != 'R') && (id[2] != 'E') &&(id[3] != 'S')) + { + printf("This is not a valid raylib Resource file!\n"); + exit(1); + } + + // Read number of resources embedded + fread(&numRes, sizeof(short), 1, rresFile); + + for (int i = 0; i < numRes; i++) + { + fread(&infoHeader, sizeof(ResInfoHeader), 1, rresFile); + + if (infoHeader.id == resId) + { + found = true; + + // Check data is of valid SOUND type + if (infoHeader.type == 1) // SOUND data type + { + // TODO: Check data compression type + // NOTE: We suppose compression type 2 (DEFLATE - default) + + // Reading SOUND parameters + Wave wave; + short sampleRate, bps; + char channels, reserved; + + fread(&sampleRate, sizeof(short), 1, rresFile); // Sample rate (frequency) + fread(&bps, sizeof(short), 1, rresFile); // Bits per sample + fread(&channels, 1, 1, rresFile); // Channels (1 - mono, 2 - stereo) + fread(&reserved, 1, 1, rresFile); // <reserved> + + printf("Sample rate: %i\n", (int)sampleRate); + printf("Bits per sample: %i\n", (int)bps); + printf("Channels: %i\n", (int)channels); + + wave.sampleRate = sampleRate; + wave.dataSize = infoHeader.srcSize; + wave.bitsPerSample = bps; + wave.channels = (short)channels; + + unsigned char *data = malloc(infoHeader.size); + + fread(data, infoHeader.size, 1, rresFile); + + wave.data = DecompressData(data, infoHeader.size, infoHeader.srcSize); + + free(data); + + // Convert wave to Sound (OpenAL) + ALenum format; + + // The OpenAL format is worked out by looking at the number of channels and the bits per sample + if (wave.channels == 1) + { + if (wave.bitsPerSample == 8 ) format = AL_FORMAT_MONO8; + else if (wave.bitsPerSample == 16) format = AL_FORMAT_MONO16; + } + else if (wave.channels == 2) + { + if (wave.bitsPerSample == 8 ) format = AL_FORMAT_STEREO8; + else if (wave.bitsPerSample == 16) format = AL_FORMAT_STEREO16; + } + + + // Create an audio source + ALuint source; + alGenSources(1, &source); // Generate pointer to audio source + + alSourcef(source, AL_PITCH, 1); + alSourcef(source, AL_GAIN, 1); + alSource3f(source, AL_POSITION, 0, 0, 0); + alSource3f(source, AL_VELOCITY, 0, 0, 0); + alSourcei(source, AL_LOOPING, AL_FALSE); + + // Convert loaded data to OpenAL buffer + //---------------------------------------- + ALuint buffer; + alGenBuffers(1, &buffer); // Generate pointer to buffer + + // Upload sound data to buffer + alBufferData(buffer, format, (void*)wave.data, wave.dataSize, wave.sampleRate); + + // Attach sound buffer to source + alSourcei(source, AL_BUFFER, buffer); + + // Unallocate WAV data + UnloadWAV(wave); + + printf("Audio file loaded...!\n"); + + sound.source = source; + sound.buffer = buffer; + } + else + { + + printf("Required resource do not seem to be a valid IMAGE resource\n"); + exit(2); + } + } + else + { + // Depending on type, skip the right amount of parameters + switch (infoHeader.type) + { + case 0: fseek(rresFile, 6, SEEK_CUR); break; // IMAGE: Jump 6 bytes of parameters + case 1: fseek(rresFile, 6, SEEK_CUR); break; // SOUND: Jump 6 bytes of parameters + case 2: fseek(rresFile, 5, SEEK_CUR); break; // MODEL: Jump 5 bytes of parameters (TODO: Review) + case 3: break; // TEXT: No parameters + case 4: break; // RAW: No parameters + default: break; + } + + // Jump DATA to read next infoHeader + fseek(rresFile, infoHeader.size, SEEK_CUR); + } + } + + fclose(rresFile); + + if (!found) printf("Required resource id could not be found in the raylib Resource file!\n"); + + return sound; +} + // Unload sound void UnloadSound(Sound sound) { @@ -197,10 +351,18 @@ void PlaySound(Sound sound) // NOTE: Only work when the entire file is in a single buffer //int byteOffset; //alGetSourcei(sound.source, AL_BYTE_OFFSET, &byteOffset); + // + //int sampleRate; + //alGetBufferi(sound.buffer, AL_FREQUENCY, &sampleRate); // AL_CHANNELS, AL_BITS (bps) + //float seconds = (float)byteOffset / sampleRate; // Number of seconds since the beginning of the sound + //or + //float result; + //alGetSourcef(sound.source, AL_SEC_OFFSET, &result); // AL_SAMPLE_OFFSET } // Play a sound with extended options +// TODO: This function should be reviewed... void PlaySoundEx(Sound sound, float timePosition, bool loop) { // TODO: Review @@ -227,6 +389,30 @@ void StopSound(Sound sound) alSourceStop(sound.source); } +// Check if a sound is playing +bool IsPlaying(Sound sound) +{ + bool playing = false; + ALint state; + + alGetSourcei(sound.source, AL_SOURCE_STATE, &state); + if (state == AL_PLAYING) playing = true; + + return playing; +} + +// Set volume for a sound +void SetVolume(Sound sound, float volume) +{ + alSourcef(sound.source, AL_GAIN, volume); +} + +// Set pitch for a sound +void SetPitch(Sound sound, float pitch) +{ + alSourcef(sound.source, AL_PITCH, pitch); +} + // Load WAV file into Wave structure static Wave LoadWAV(char *fileName) { |