audio/wavaudio.c - qemu - Git at Google

 /*
  * QEMU WAV audio driver
  *
  * Copyright (c) 2004-2005 Vassili Karpov (malc)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 #include "qemu/osdep.h"
 #include "qemu/host-utils.h"
 #include "qemu/module.h"
 #include "qemu/timer.h"
 #include "qapi/opts-visitor.h"
 #include "audio.h"

 #define AUDIO_CAP "wav"
 #include "audio_int.h"

 typedef struct WAVVoiceOut {
     HWVoiceOut hw;
     FILE *f;
     RateCtl rate;
     int total_samples;
 } WAVVoiceOut;

 static size_t wav_write_out(HWVoiceOut *hw, void *buf, size_t len)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     int64_t bytes = audio_rate_get_bytes(&wav->rate, &hw->info, len);
     assert(bytes % hw->info.bytes_per_frame == 0);

     if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) {
         dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n",
               bytes, strerror(errno));
     }

     wav->total_samples += bytes / hw->info.bytes_per_frame;
     return bytes;
 }

 /* VICE code: Store number as little endian. */
 static void le_store (uint8_t *buf, uint32_t val, int len)
 {
     int i;
     for (i = 0; i < len; i++) {
         buf[i] = (uint8_t) (val & 0xff);
         val >>= 8;
     }
 }

 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
                         void *drv_opaque)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     int bits16 = 0, stereo = 0;
     uint8_t hdr[] = {
         0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
         0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
         0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
         0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
     };
     Audiodev *dev = drv_opaque;
     AudiodevWavOptions *wopts = &dev->u.wav;
     struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out);
     const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav";

     stereo = wav_as.nchannels == 2;
     switch (wav_as.fmt) {
     case AUDIO_FORMAT_S8:
     case AUDIO_FORMAT_U8:
         bits16 = 0;
         break;

     case AUDIO_FORMAT_S16:
     case AUDIO_FORMAT_U16:
         bits16 = 1;
         break;

     case AUDIO_FORMAT_S32:
     case AUDIO_FORMAT_U32:
         dolog ("WAVE files can not handle 32bit formats\n");
         return -1;

     default:
         abort();
     }

     hdr[34] = bits16 ? 0x10 : 0x08;

     wav_as.endianness = 0;
     audio_pcm_init_info (&hw->info, &wav_as);

     hw->samples = 1024;
     le_store (hdr + 22, hw->info.nchannels, 2);
     le_store (hdr + 24, hw->info.freq, 4);
     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
     le_store (hdr + 32, 1 << (bits16 + stereo), 2);

     wav->f = fopen(wav_path, "wb");
     if (!wav->f) {
         dolog ("Failed to open wave file `%s'\nReason: %s\n",
                wav_path, strerror(errno));
         return -1;
     }

     if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
         dolog ("wav_init_out: failed to write header\nReason: %s\n",
                strerror(errno));
         return -1;
     }

     audio_rate_start(&wav->rate);
     return 0;
 }

 static void wav_fini_out (HWVoiceOut *hw)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     uint8_t rlen[4];
     uint8_t dlen[4];
     uint32_t datalen = wav->total_samples * hw->info.bytes_per_frame;
     uint32_t rifflen = datalen + 36;

     if (!wav->f) {
         return;
     }

     le_store (rlen, rifflen, 4);
     le_store (dlen, datalen, 4);

     if (fseek (wav->f, 4, SEEK_SET)) {
         dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
                strerror(errno));
         goto doclose;
     }
     if (fwrite (rlen, 4, 1, wav->f) != 1) {
         dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
                strerror (errno));
         goto doclose;
     }
     if (fseek (wav->f, 32, SEEK_CUR)) {
         dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
                strerror (errno));
         goto doclose;
     }
     if (fwrite (dlen, 4, 1, wav->f) != 1) {
         dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
                strerror (errno));
         goto doclose;
     }

  doclose:
     if (fclose (wav->f))  {
         dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
                wav->f, strerror (errno));
     }
     wav->f = NULL;
 }

 static void wav_enable_out(HWVoiceOut *hw, bool enable)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;

     if (enable) {
         audio_rate_start(&wav->rate);
     }
 }

 static void *wav_audio_init(Audiodev *dev)
 {
     assert(dev->driver == AUDIODEV_DRIVER_WAV);
     return dev;
 }

 static void wav_audio_fini (void *opaque)
 {
     ldebug ("wav_fini");
 }

 static struct audio_pcm_ops wav_pcm_ops = {
     .init_out = wav_init_out,
     .fini_out = wav_fini_out,
     .write    = wav_write_out,
     .buffer_get_free = audio_generic_buffer_get_free,
     .run_buffer_out = audio_generic_run_buffer_out,
     .enable_out = wav_enable_out,
 };

 static struct audio_driver wav_audio_driver = {
     .name           = "wav",
     .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
     .init           = wav_audio_init,
     .fini           = wav_audio_fini,
     .pcm_ops        = &wav_pcm_ops,
     .can_be_default = 0,
     .max_voices_out = 1,
     .max_voices_in  = 0,
     .voice_size_out = sizeof (WAVVoiceOut),
     .voice_size_in  = 0
 };

 static void register_audio_wav(void)
 {
     audio_driver_register(&wav_audio_driver);
 }
 type_init(register_audio_wav);
	/*
	* QEMU WAV audio driver
	*
	* Copyright (c) 2004-2005 Vassili Karpov (malc)
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	#include "qemu/osdep.h"
	#include "qemu/host-utils.h"
	#include "qemu/module.h"
	#include "qemu/timer.h"
	#include "qapi/opts-visitor.h"
	#include "audio.h"

	#define AUDIO_CAP "wav"
	#include "audio_int.h"

	typedef struct WAVVoiceOut {
	HWVoiceOut hw;
	FILE *f;
	RateCtl rate;
	int total_samples;
	} WAVVoiceOut;

	static size_t wav_write_out(HWVoiceOut hw, void buf, size_t len)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	int64_t bytes = audio_rate_get_bytes(&wav->rate, &hw->info, len);
	assert(bytes % hw->info.bytes_per_frame == 0);

	if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) {
	dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n",
	bytes, strerror(errno));
	}

	wav->total_samples += bytes / hw->info.bytes_per_frame;
	return bytes;
	}

	/* VICE code: Store number as little endian. */
	static void le_store (uint8_t *buf, uint32_t val, int len)
	{
	int i;
	for (i = 0; i < len; i++) {
	buf[i] = (uint8_t) (val & 0xff);
	val >>= 8;
	}
	}

	static int wav_init_out(HWVoiceOut hw, struct audsettings as,
	void *drv_opaque)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	int bits16 = 0, stereo = 0;
	uint8_t hdr[] = {
	0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
	0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
	0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
	0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
	};
	Audiodev *dev = drv_opaque;
	AudiodevWavOptions *wopts = &dev->u.wav;
	struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out);
	const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav";

	stereo = wav_as.nchannels == 2;
	switch (wav_as.fmt) {
	case AUDIO_FORMAT_S8:
	case AUDIO_FORMAT_U8:
	bits16 = 0;
	break;

	case AUDIO_FORMAT_S16:
	case AUDIO_FORMAT_U16:
	bits16 = 1;
	break;

	case AUDIO_FORMAT_S32:
	case AUDIO_FORMAT_U32:
	dolog ("WAVE files can not handle 32bit formats\n");
	return -1;

	default:
	abort();
	}

	hdr[34] = bits16 ? 0x10 : 0x08;

	wav_as.endianness = 0;
	audio_pcm_init_info (&hw->info, &wav_as);

	hw->samples = 1024;
	le_store (hdr + 22, hw->info.nchannels, 2);
	le_store (hdr + 24, hw->info.freq, 4);
	le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
	le_store (hdr + 32, 1 << (bits16 + stereo), 2);

	wav->f = fopen(wav_path, "wb");
	if (!wav->f) {
	dolog ("Failed to open wave file `%s'\nReason: %s\n",
	wav_path, strerror(errno));
	return -1;
	}

	if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
	dolog ("wav_init_out: failed to write header\nReason: %s\n",
	strerror(errno));
	return -1;
	}

	audio_rate_start(&wav->rate);
	return 0;
	}

	static void wav_fini_out (HWVoiceOut *hw)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	uint8_t rlen[4];
	uint8_t dlen[4];
	uint32_t datalen = wav->total_samples * hw->info.bytes_per_frame;
	uint32_t rifflen = datalen + 36;

	if (!wav->f) {
	return;
	}

	le_store (rlen, rifflen, 4);
	le_store (dlen, datalen, 4);

	if (fseek (wav->f, 4, SEEK_SET)) {
	dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
	strerror(errno));
	goto doclose;
	}
	if (fwrite (rlen, 4, 1, wav->f) != 1) {
	dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
	strerror (errno));
	goto doclose;
	}
	if (fseek (wav->f, 32, SEEK_CUR)) {
	dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
	strerror (errno));
	goto doclose;
	}
	if (fwrite (dlen, 4, 1, wav->f) != 1) {
	dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
	strerror (errno));
	goto doclose;
	}

	doclose:
	if (fclose (wav->f)) {
	dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
	wav->f, strerror (errno));
	}
	wav->f = NULL;
	}

	static void wav_enable_out(HWVoiceOut *hw, bool enable)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;

	if (enable) {
	audio_rate_start(&wav->rate);
	}
	}

	static void wav_audio_init(Audiodev dev)
	{
	assert(dev->driver == AUDIODEV_DRIVER_WAV);
	return dev;
	}

	static void wav_audio_fini (void *opaque)
	{
	ldebug ("wav_fini");
	}

	static struct audio_pcm_ops wav_pcm_ops = {
	.init_out = wav_init_out,
	.fini_out = wav_fini_out,
	.write = wav_write_out,
	.buffer_get_free = audio_generic_buffer_get_free,
	.run_buffer_out = audio_generic_run_buffer_out,
	.enable_out = wav_enable_out,
	};

	static struct audio_driver wav_audio_driver = {
	.name = "wav",
	.descr = "WAV renderer http://wikipedia.org/wiki/WAV",
	.init = wav_audio_init,
	.fini = wav_audio_fini,
	.pcm_ops = &wav_pcm_ops,
	.can_be_default = 0,
	.max_voices_out = 1,
	.max_voices_in = 0,
	.voice_size_out = sizeof (WAVVoiceOut),
	.voice_size_in = 0
	};

	static void register_audio_wav(void)
	{
	audio_driver_register(&wav_audio_driver);
	}
	type_init(register_audio_wav);