Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / libzmpeg3 / a52dec-0.7.3 / libao / audio_out_wav.c

diff --git a/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_wav.c b/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_wav.c
new file mode 100644 (file)
index 0000000..e151ef7
--- /dev/null
+++ b/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_wav.c
@@ -0,0 +1,145 @@
+/*
+ * audio_out_wav.c
+ * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of a52dec, a free ATSC A-52 stream decoder.
+ * See http://liba52.sourceforge.net/ for updates.
+ *
+ * a52dec 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.
+ *
+ * a52dec 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
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include "a52.h"
+#include "audio_out.h"
+#include "audio_out_internal.h"
+
+typedef struct wav_instance_s {
+    ao_instance_t ao;
+    int sample_rate;
+    int set_params;
+    int flags;
+    int size;
+} wav_instance_t;
+
+static uint8_t wav_header[] = {
+    'R', 'I', 'F', 'F', 0xfc, 0xff, 0xff, 0xff, 'W', 'A', 'V', 'E',
+    'f', 'm', 't', ' ', 16, 0, 0, 0,
+    1, 0, 2, 0, -1, -1, -1, -1, -1, -1, -1, -1, 4, 0, 16, 0,
+    'd', 'a', 't', 'a', 0xd8, 0xff, 0xff, 0xff
+};
+
+int wav_setup (ao_instance_t * _instance, int sample_rate, int * flags,
+                  sample_t * level, sample_t * bias)
+{
+    wav_instance_t * instance = (wav_instance_t *) _instance;
+
+    if ((instance->set_params == 0) && (instance->sample_rate != sample_rate))
+       return 1;
+    instance->sample_rate = sample_rate;
+
+    *flags = instance->flags;
+    *level = 1;
+    *bias = 384;
+
+    return 0;
+}
+
+static void store (uint8_t * buf, int value)
+{
+    buf[0] = value;
+    buf[1] = value >> 8;
+    buf[2] = value >> 16;
+    buf[3] = value >> 24;
+}
+
+int wav_play (ao_instance_t * _instance, int flags, sample_t * _samples)
+{
+    wav_instance_t * instance = (wav_instance_t *) _instance;
+    int16_t int16_samples[256*2];
+
+#ifdef LIBA52_DOUBLE
+    float samples[256 * 2];
+    int i;
+
+    for (i = 0; i < 256 * 2; i++)
+       samples[i] = _samples[i];
+#else
+    float * samples = _samples;
+#endif
+
+    if (instance->set_params) {
+       instance->set_params = 0;
+       store (wav_header + 24, instance->sample_rate);
+       store (wav_header + 28, instance->sample_rate * 4);
+       fwrite (wav_header, sizeof (wav_header), 1, stdout);
+    }
+
+    float2s16_2 (samples, int16_samples);
+    s16_LE (int16_samples, 2);
+    fwrite (int16_samples, 256 * sizeof (int16_t) * 2, 1, stdout);
+
+    instance->size += 256 * sizeof (int16_t) * 2;
+
+    return 0;
+}
+
+void wav_close (ao_instance_t * _instance)
+{
+    wav_instance_t * instance = (wav_instance_t *) _instance;
+
+    if (fseek (stdout, 0, SEEK_SET) < 0)
+       return;
+
+    store (wav_header + 4, instance->size + 36);
+    store (wav_header + 40, instance->size);
+    fwrite (wav_header, sizeof (wav_header), 1, stdout);
+}
+
+ao_instance_t * wav_open (int flags)
+{
+    wav_instance_t * instance;
+
+    instance = malloc (sizeof (wav_instance_t));
+    if (instance == NULL)
+       return NULL;
+
+    instance->ao.setup = wav_setup;
+    instance->ao.play = wav_play;
+    instance->ao.close = wav_close;
+
+    instance->sample_rate = 0;
+    instance->set_params = 1;
+    instance->flags = flags;
+    instance->size = 0;
+
+    return (ao_instance_t *) instance;
+}
+
+ao_instance_t * ao_wav_open (void)
+{
+    return wav_open (A52_STEREO);
+}
+
+ao_instance_t * ao_wavdolby_open (void)
+{
+    return wav_open (A52_DOLBY);
+}