Пример #1
0
void render_vgmstream_blocked(sample * buffer, int32_t sample_count, VGMSTREAM * vgmstream) {
    int samples_written=0;

    int frame_size = get_vgmstream_frame_size(vgmstream);
    int samples_per_frame = get_vgmstream_samples_per_frame(vgmstream);
    int samples_this_block;

    if (frame_size == 0) {
        /* assume 4 bit */
        /* TODO: get_vgmstream_frame_size() really should return bits... */
        samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
    } else {
        samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
    }

    while (samples_written<sample_count) {
        int samples_to_do;

        if (vgmstream->loop_flag && vgmstream_do_loop(vgmstream)) {
            if (frame_size == 0) {
                samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
            } else {
                samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
            }
            continue;
        }

        samples_to_do = vgmstream_samples_to_do(samples_this_block, samples_per_frame, vgmstream);

        if (samples_written+samples_to_do > sample_count)
            samples_to_do=sample_count-samples_written;

        if (vgmstream->current_block_offset>=0)
            decode_vgmstream(vgmstream, samples_written, samples_to_do, buffer);
        else {
            int i;
            /* we've run off the end! */
            for (i=samples_written*vgmstream->channels;
                    i<(samples_written+samples_to_do)*vgmstream->channels; i++)
                buffer[i]=0;
        }

        samples_written += samples_to_do;
        vgmstream->current_sample += samples_to_do;
        vgmstream->samples_into_block+=samples_to_do;

        if (vgmstream->samples_into_block==samples_this_block) {
            switch (vgmstream->layout_type) {
            case layout_ast_blocked:
                ast_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_halpst_blocked:
                if (vgmstream->next_block_offset>=0)
                    halpst_block_update(vgmstream->next_block_offset,vgmstream);
                else
                    vgmstream->current_block_offset=-1;
                break;
            case layout_xa_blocked:
                xa_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_ea_blocked:
                ea_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_eacs_blocked:
                eacs_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_caf_blocked:
                caf_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_wsi_blocked:
                wsi_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_str_snds_blocked:
                str_snds_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_ws_aud_blocked:
                ws_aud_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_matx_blocked:
                matx_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_de2_blocked:
                de2_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_emff_ps2_blocked:
                emff_ps2_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_emff_ngc_blocked:
                emff_ngc_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_gsb_blocked:
                gsb_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_vs_blocked:
                vs_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_xvas_blocked:
                xvas_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_thp_blocked:
                thp_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            case layout_filp_blocked:
                filp_block_update(vgmstream->next_block_offset,vgmstream);
                break;
            default:
                break;
            }

            /* for VBR these may change */
            frame_size = get_vgmstream_frame_size(vgmstream);
            samples_per_frame = get_vgmstream_samples_per_frame(vgmstream);

            if (frame_size == 0) {
                samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
            } else {
                samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
            }
            vgmstream->samples_into_block=0;
        }

    }
}
Пример #2
0
VGMSTREAM * init_vgmstream_eacs(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[260];
    int channel_count;
    int loop_flag=0;
	char little_endian=0;
	off_t	start_offset;
	EACSHeader	*ea_header = NULL;
	int32_t samples_count=0;
    int i;

    /* check extension, case insensitive */
    streamFile->get_name(streamFile,filename,sizeof(filename));
    if (strcasecmp("cnk",filename_extension(filename)) && 
		strcasecmp("as4",filename_extension(filename)) && 
		strcasecmp("asf",filename_extension(filename))) goto fail;

	ea_header=(EACSHeader *)malloc(sizeof(EACSHeader));

    /* check header */
    if ((uint32_t)read_32bitBE(0,streamFile)!=0x31534E68) /* "1SNh" */
        goto fail;

	/* check if we are little or big endian */
    if ((uint32_t)read_32bitBE(4,streamFile)<0x40) 
        little_endian=1;

    /* check type details */
	start_offset = read_32bitLE(0x04,streamFile);

	if((uint32_t)read_32bitBE(0x08,streamFile)==0x45414353) { /* EACS */ 
		read_streamfile((uint8_t*)ea_header,0x08,sizeof(EACSHeader),streamFile);
		loop_flag = 0; //(ea_header->dwLoopStart!=0);
		channel_count = (ea_header->bChannels);
		/* build the VGMSTREAM */

		vgmstream = allocate_vgmstream(channel_count,0);
		if (!vgmstream) goto fail;

		/* fill in the vital statistics */
		init_get_high_nibble(vgmstream);
		
		vgmstream->sample_rate = ea_header->dwSampleRate;
		
		if(ea_header->bCompression==0) {
			vgmstream->coding_type = coding_PCM16LE_int;
			if(ea_header->bBits==1)
				vgmstream->coding_type = coding_PCM8_int;
		}
		else 
			vgmstream->coding_type = coding_EACS_IMA;
		
		vgmstream->layout_type = layout_eacs_blocked;
		vgmstream->meta_type = meta_EACS_PC;

		if(little_endian)
			vgmstream->meta_type = meta_EACS_SAT;

	} else {
		channel_count=read_32bitLE(0x20,streamFile);
		
		vgmstream = allocate_vgmstream(channel_count,0);
		if (!vgmstream) goto fail;

		vgmstream->sample_rate = read_32bitLE(0x08,streamFile);
		vgmstream->coding_type = coding_PSX;
		vgmstream->layout_type=layout_eacs_blocked;
		vgmstream->meta_type=meta_EACS_PSX;
	}

	vgmstream->ea_platform=little_endian;

    /* open the file for reading by each channel */
    {
        for (i=0;i<channel_count;i++) {
            vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,0x8000);
            if (!vgmstream->ch[i].streamfile) goto fail;
        }
    }

	// calc the samples length ...
	if(little_endian)
		vgmstream->next_block_offset=read_32bitBE(0x04,streamFile);
	else
		vgmstream->next_block_offset=read_32bitLE(0x04,streamFile);

	if(vgmstream->next_block_offset>0x30) {
		vgmstream->current_block_size=vgmstream->next_block_offset-sizeof(EACSHeader);
		samples_count=(int32_t)vgmstream->current_block_size/get_vgmstream_frame_size(vgmstream)*get_vgmstream_samples_per_frame(vgmstream);
		samples_count/=vgmstream->channels;
	}
	
	do {
		if(read_32bitBE(vgmstream->next_block_offset,vgmstream->ch[0].streamfile)==0x31534E6C) {
			ea_header->dwLoopStart=read_32bitLE(vgmstream->next_block_offset+0x08,vgmstream->ch[0].streamfile);
			vgmstream->next_block_offset+=0x0C;
		}

		if(read_32bitBE(vgmstream->next_block_offset,vgmstream->ch[0].streamfile)==0x31534E65) 
			break;

		eacs_block_update(vgmstream->next_block_offset,vgmstream);
		samples_count+=vgmstream->current_block_size/get_vgmstream_frame_size(vgmstream)*get_vgmstream_samples_per_frame(vgmstream);
	} while(vgmstream->next_block_offset<get_streamfile_size(streamFile)-8);

	// Reset values ...
	// setting up the first header by calling the eacs_block_update sub
	if(little_endian)
		vgmstream->next_block_offset=read_32bitBE(0x04,streamFile);
	else
		vgmstream->next_block_offset=read_32bitLE(0x04,streamFile);

	vgmstream->current_block_size=vgmstream->next_block_offset-sizeof(EACSHeader);
	
	if(vgmstream->coding_type!=coding_PSX)
		vgmstream->current_block_size-=8;

	if(vgmstream->coding_type==coding_PSX) 
		eacs_block_update(0x2C,vgmstream);
	else 
		eacs_block_update(0x28,vgmstream);

	// re-allocate the sample count
	vgmstream->num_samples=samples_count;
	
	if(loop_flag) {
		vgmstream->loop_start_sample = ea_header->dwLoopStart;
		vgmstream->loop_end_sample = vgmstream->num_samples;
	}

	if(ea_header) 
		free(ea_header);

    return vgmstream;

    /* clean up anything we may have opened */
fail:
	if(ea_header) 
		free(ea_header);
    if (vgmstream) close_vgmstream(vgmstream);
    return NULL;
}
Пример #3
0
void decode_msadpcm_stereo(VGMSTREAM * vgmstream, sample * outbuf, int32_t first_sample, int32_t samples_to_do) {
    VGMSTREAMCHANNEL *ch1,*ch2;
    int i;
    int framesin;
    STREAMFILE *streamfile;
    off_t offset;

    framesin = first_sample/get_vgmstream_samples_per_frame(vgmstream);
    first_sample = first_sample%get_vgmstream_samples_per_frame(vgmstream);

    ch1 = &vgmstream->ch[0];
    ch2 = &vgmstream->ch[1];
    streamfile = ch1->streamfile;
    offset = ch1->offset+framesin*get_vgmstream_frame_size(vgmstream);

    if (first_sample==0) {
        ch1->adpcm_coef[0] = ADPCMCoeffs[read_8bit(offset,streamfile)][0];
        ch1->adpcm_coef[1] = ADPCMCoeffs[read_8bit(offset,streamfile)][1];
        ch2->adpcm_coef[0] = ADPCMCoeffs[read_8bit(offset+1,streamfile)][0];
        ch2->adpcm_coef[1] = ADPCMCoeffs[read_8bit(offset+1,streamfile)][1];
        ch1->adpcm_scale = read_16bitLE(offset+2,streamfile);
        ch2->adpcm_scale = read_16bitLE(offset+4,streamfile);
        ch1->adpcm_history1_16 = read_16bitLE(offset+6,streamfile);
        ch2->adpcm_history1_16 = read_16bitLE(offset+8,streamfile);
        ch1->adpcm_history2_16 = read_16bitLE(offset+10,streamfile);
        ch2->adpcm_history2_16 = read_16bitLE(offset+12,streamfile);

        outbuf[0] = ch1->adpcm_history2_16;
        outbuf[1] = ch2->adpcm_history2_16;

        outbuf+=2;
        first_sample++;
        samples_to_do--;
    }
    if (first_sample==1 && samples_to_do > 0) {
        outbuf[0] = ch1->adpcm_history1_16;
        outbuf[1] = ch2->adpcm_history1_16;

        outbuf+=2;
        first_sample++;
        samples_to_do--;
    }

    for (i=first_sample; i<first_sample+samples_to_do; i++) {
        int j;

        for (j=0; j<2; j++)
        {
            VGMSTREAMCHANNEL *ch = &vgmstream->ch[j];
            int sample_nibble =
                (j == 0 ?
                 get_high_nibble_signed(read_8bit(offset+14+i-2,streamfile)) :
                 get_low_nibble_signed(read_8bit(offset+14+i-2,streamfile))
                );
            int32_t hist1,hist2;
            int32_t predicted;

            hist1 = ch->adpcm_history1_16;
            hist2 = ch->adpcm_history2_16;
            predicted = hist1 * ch->adpcm_coef[0] + hist2 * ch->adpcm_coef[1];
            predicted /= 256;
            predicted += sample_nibble*ch->adpcm_scale;
            outbuf[0] = clamp16(predicted);
            ch->adpcm_history2_16 = ch->adpcm_history1_16;
            ch->adpcm_history1_16 = outbuf[0];
            ch->adpcm_scale = (ADPCMTable[sample_nibble&0xf] *
                               ch->adpcm_scale) / 256;
            if (ch->adpcm_scale < 0x10) ch->adpcm_scale = 0x10;

            outbuf++;
        }
    }
}