wavetoraw.cc

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/* MPEG/WAVE Sound library

   (C) 1997 by Jung woo-jae */

// Wavetoraw.cc
// Server which strips wave header.

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <malloc.h>

#include "mpegsound.h"

Wavetoraw::Wavetoraw(Soundinputstream * loader, Soundplayer * player)
{
    __errorcode = SOUND_ERROR_OK;
    initialized = false;
    buffer = NULL;
    this->loader = loader;
    this->player = player;
};

Wavetoraw::~Wavetoraw()
{
    if (buffer)
	free(buffer);
};


// Convert wave format to raw format class
bool
Wavetoraw::initialize(void)
{
    if (!buffer) {
	buffersize = player->getblocksize();
	if ((buffer = (char *) malloc(buffersize)) == NULL) {
	    seterrorcode(SOUND_ERROR_MEMORYNOTENOUGH);
	    return false;
	}
    }
    return true;
}

bool
Wavetoraw::run(void)
{
    int c;

    if (initialized) {
	c = loader->getblock(buffer, buffersize);
	if (c == 0) {
	    seterrorcode(SOUND_ERROR_FILEREADFAIL);
	    return false;
	}

	currentpoint += c;
	if (player->putblock(buffer, buffersize) == false)
	    return false;

	if (currentpoint >= size) {
	    seterrorcode(SOUND_ERROR_FINISH);
	    return false;
	}
    } else {
	c = loader->getblock(buffer, sizeof(WAVEHEADER));
	if (c == 0) {
	    seterrorcode(SOUND_ERROR_FILEREADFAIL);
	    return false;
	}

	if (!testwave(buffer))
	    return false;
	if (player->setsoundtype(stereo, samplesize, speed) == false)
	    return false;
	currentpoint = 0;
	initialized = true;
    }
    return true;
}

void
Wavetoraw::setcurrentpoint(int p)
{
    if (p * pcmsize > size)
	currentpoint = size;
    else
	currentpoint = p * pcmsize;
    loader->setposition(currentpoint + sizeof(WAVEHEADER));
}

bool
Wavetoraw::testwave(char *buffer)
{
    WAVEHEADER *tmp = (WAVEHEADER *) buffer;

    if (tmp->main_chunk == RIFF && tmp->chunk_type == WAVE &&
	tmp->sub_chunk == FMT && tmp->data_chunk == DATA)
	if (tmp->format == PCM_CODE && tmp->modus <= 2) {
	    stereo = (tmp->modus == WAVE_STEREO) ? 1 : 0;
	    samplesize = (int) (tmp->bit_p_spl);
	    speed = (int) (tmp->sample_fq);
	    size = (int) (tmp->data_length);

	    pcmsize = 1;
	    if (stereo == 1)
		pcmsize *= 2;
	    if (samplesize == 16)
		pcmsize *= 2;
	    return true;
	}

    seterrorcode(SOUND_ERROR_BAD);
    return false;
}