ABX<->WAV converter; ABX code modularized, ABX encoder added, direct WAV file io

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3596 8092fc87-c524-0410-9efc-e669fe64eaf9
2011-05-04 20:19:27 +00:00
parent ede7d2a545
commit c18134d041
13 changed files with 1925 additions and 315 deletions
@@ -0,0 +1,123 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * WAVE to ABX: By Serge van den Boom (svdb@stack.nl) and 
+ *    Alex Volkov (codepro@usa.net)
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "abx.h"
+#include "wav.h"
+
+#define BUFFER_SIZE 0x1000
+
+void convert_wave_to_abx(wave_File *wave, abx_File *abx);
+
+int
+main(int argc, char *argv[]) {
+	wave_File wave;
+	abx_File abx;
+
+	if (argc != 3) {
+		fprintf(stderr, "wav2abx <infile> <outfile>\n");
+		return EXIT_FAILURE;
+	}
+
+	if (!wave_open(&wave, argv[1])) {
+		perror("Could not open input file");
+		return EXIT_FAILURE;
+	}
+	if (wave.fmtHdr.channels != 1) {
+		fprintf(stderr, "Unsupported number of channels %u\n", 
+				(unsigned)wave.fmtHdr.channels);
+		return EXIT_FAILURE;
+	}
+	if (wave.fmtHdr.bitsPerSample != 8 && wave.fmtHdr.bitsPerSample != 16) {
+		fprintf(stderr, "Unsupported bits per sample %u\n", 
+				(unsigned)wave.fmtHdr.bitsPerSample);
+		return EXIT_FAILURE;
+	}
+
+	if (!abx_create(&abx, argv[2])) {
+		perror("Could not open output file");
+		return EXIT_FAILURE;
+	}
+
+	convert_wave_to_abx(&wave, &abx);
+
+	abx_close(&abx);
+	wave_close(&wave);
+	return EXIT_SUCCESS;
+}
+
+void
+convert_16(void *buf, uint32_t bufsize) {
+	uint8_t *src = buf;
+	uint8_t *dst = buf;
+
+	for ( ; bufsize > 1; src += 2, ++dst, bufsize -= 2) {
+		int v = (int16_t)((src[1] << 8) | src[0]);
+		// with error correction
+		v += 0x80;
+		if (v > 0x7fff)
+			v = 0x7fff;
+		*dst = ((v >> 8) & 0xff) ^ 0x80;
+	}
+}
+
+void
+convert_wave_to_abx(wave_File *wave, abx_File *abx) {
+
+	uint32_t bufsize;
+	uint8_t buf[BUFFER_SIZE * 2];
+	uint32_t bytes;
+	unsigned numFrames;
+	unsigned bytesPerSample;
+
+	abx_setSamplingRate(abx, wave->fmtHdr.samplesPerSec);
+	// Calculate number of frames as close as we can so that
+	// we do not waste file bytes
+	bytesPerSample = wave->fmtHdr.bitsPerSample / 8;
+	numFrames = (wave->data_size / bytesPerSample + BUFFER_SIZE - 1)
+			/ BUFFER_SIZE;
+	abx_setMaxFrames(abx, numFrames);
+
+	// We support 16 bit samples
+	bufsize = BUFFER_SIZE;
+	if (bytesPerSample == 2)
+		bufsize *= 2;
+
+	for (bytes = wave_readData(wave, buf, bufsize); bytes > 0; ) {
+		if (bytesPerSample == 2)
+		{
+			convert_16(buf, bytes);
+			bytes /= 2;
+		}
+
+		if (abx_writeFrame(abx, buf, bytes) == 0 && abx->last_error != 0) {
+			fprintf(stderr, "Cannot write abx: %s\n", strerror(abx->last_error));
+			break;
+		}
+		bytes = wave_readData(wave, buf, bufsize);
+	}
+	if (bytes == 0 && wave->last_error != 0)
+		fprintf(stderr, "Cannot read wave: %s\n", strerror(wave->last_error));
+}