+static void put32(uint32_t v)
+{
+ fputc( v & 0xff, outfile);
+ fputc((v >> 8) & 0xff, outfile);
+ fputc((v >> 16) & 0xff, outfile);
+ fputc((v >> 24) & 0xff, outfile);
+}
+
+#define HEADER_SIZE 46
+#define FMT_SIZE 18
+#define SAMPLE_SIZE 2
+#define WFORMAT_PCM 0x0001
+
+static void put_wav_header(int sample_rate, int channels, int nb_samples)
+{
+ int block_align = SAMPLE_SIZE * channels;
+ int data_size = block_align * nb_samples;
+
+ fputs("RIFF", outfile);
+ put32(HEADER_SIZE + data_size);
+ fputs("WAVEfmt ", outfile);
+ put32(FMT_SIZE);
+ put16(WFORMAT_PCM);
+ put16(channels);
+ put32(sample_rate);
+ put32(block_align * sample_rate);
+ put16(block_align);
+ put16(SAMPLE_SIZE * 8);
+ put16(0);
+ fputs("data", outfile);
+ put32(data_size);
+}
+