11d7bede77
Added the ability to compile a subset of functions in to a test executable for Linux. To be used in the future for testing. Removed unnecessary includes. Tested working by compiling test executable for GNU/Linux and for the 3DS. The 3dsx was tested in citra. Signed-off-by: Mahyar Koshkouei <mk@deltabeard.com>
118 lines
2.2 KiB
C
118 lines
2.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "wav.h"
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#include "playback.h"
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static const size_t buffSize = 16 * 1024;
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static FILE* pWav = NULL;
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static char header[45];
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static uint8_t channels;
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/**
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* Set decoder parameters for WAV.
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*
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* \param decoder Structure to store parameters.
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*/
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void setWav(struct decoder_fn* decoder)
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{
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decoder->init = &initWav;
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decoder->rate = &rateWav;
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decoder->channels = &channelWav;
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decoder->buffSize = buffSize;
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decoder->decode = &readWav;
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decoder->exit = &exitWav;
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}
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/**
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* Initialise WAV playback.
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*
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* \param file Location of WAV file to play.
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* \return 0 on success, else failure.
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*/
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int initWav(const char* file)
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{
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pWav = fopen(file, "rb");
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if(pWav == NULL)
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return -1;
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/* TODO: No need to read the first number of bytes */
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if(fread(header, 1, 44, pWav) == 0)
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return -1;
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/**
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* http://www.topherlee.com/software/pcm-tut-wavformat.html and
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* http://soundfile.sapp.org/doc/WaveFormat/ helped a lot.
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* format = (header[19]<<8) + (header[20]);
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* channels = (header[23]<<8) + (header[22]);
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* sample = (header[27]<<24) + (header[26]<<16) + (header[25]<<8) +
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* (header[24]);
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* byterate = (header[31]<<24) + (header[30]<<16) + (header[29]<<8) +
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* (header[28]);
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* blockalign = (header[33]<<8) + (header[32]);
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* bitness = (header[35]<<8) + (header[34]);
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*/
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/* TODO: This should be moved to get file type */
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/* Only support 16 bit PCM WAV */
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if(((header[35]<<8) + (header[34])) != 16)
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return -1;
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channels = (header[23]<<8) + (header[22]);
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switch(channels)
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{
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/* Only Mono and Stereo allowed */
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case 1:
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case 2:
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break;
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default:
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return -1;
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}
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return 0;
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}
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/**
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* Get sampling rate of Wav file.
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*
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* \return Sampling rate.
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*/
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uint32_t rateWav(void)
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{
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return (header[27]<<24) + (header[26]<<16) + (header[25]<<8) +
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(header[24]);
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}
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/**
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* Get number of channels of Wav file.
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*
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* \return Number of channels for opened file.
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*/
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uint8_t channelWav(void)
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{
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return channels;
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}
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/**
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* Read part of open Wav file.
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*
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* \param buffer Output.
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* \return Samples read for each channel.
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*/
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uint64_t readWav(void* buffer)
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{
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return fread(buffer, 1, buffSize, pWav) / sizeof(int16_t);
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}
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/**
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* Free Wav file.
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*/
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void exitWav(void)
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{
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fclose(pWav);
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}
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