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 "vl.h"

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

 typedef struct WAVVoiceOut {
     HWVoiceOut hw;
     QEMUFile *f;
     int64_t old_ticks;
     void *pcm_buf;
     int total_samples;
 } WAVVoiceOut;

 static struct {
     const char *wav_path;
 } conf = {
     .wav_path = "qemu.wav"
 };

 static int wav_run_out (HWVoiceOut *hw)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     int rpos, live, decr, samples;
     uint8_t *dst;
     st_sample_t *src;
     int64_t now = qemu_get_clock (vm_clock);
     int64_t ticks = now - wav->old_ticks;
     int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;

     if (bytes > INT_MAX) {
         samples = INT_MAX >> hw->info.shift;
     }
     else {
         samples = bytes >> hw->info.shift;
     }

     live = audio_pcm_hw_get_live_out (hw);
     if (!live) {
         return 0;
     }

     wav->old_ticks = now;
     decr = audio_MIN (live, samples);
     samples = decr;
     rpos = hw->rpos;
     while (samples) {
         int left_till_end_samples = hw->samples - rpos;
         int convert_samples = audio_MIN (samples, left_till_end_samples);

         src = hw->mix_buf + rpos;
         dst = advance (wav->pcm_buf, rpos << hw->info.shift);

         hw->clip (dst, src, convert_samples);
         qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
         mixeng_clear (src, convert_samples);

         rpos = (rpos + convert_samples) % hw->samples;
         samples -= convert_samples;
         wav->total_samples += convert_samples;
     }

     hw->rpos = rpos;
     return decr;
 }

 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
 {
     return audio_pcm_sw_write (sw, buf, len);
 }

 /* 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, int freq, int nchannels, audfmt_e fmt)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     int bits16;
     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
     };

     freq = audio_state.fixed_freq_out;
     fmt = audio_state.fixed_fmt_out;
     nchannels = audio_state.fixed_channels_out;

     switch (fmt) {
     case AUD_FMT_S8:
     case AUD_FMT_U8:
         bits16 = 0;
         break;

     case AUD_FMT_S16:
     case AUD_FMT_U16:
         bits16 = 1;
         break;

     default:
         dolog ("Internal logic error bad format %d\n", fmt);
         return -1;
     }

     hdr[34] = bits16 ? 0x10 : 0x08;
     audio_pcm_init_info (
         &hw->info,
         freq,
         nchannels,
         bits16 ? AUD_FMT_S16 : AUD_FMT_U8,
         audio_need_to_swap_endian (0)
         );
     hw->bufsize = 4096;
     wav->pcm_buf = qemu_mallocz (hw->bufsize);
     if (!wav->pcm_buf) {
         dolog ("Can not initialize WAV buffer of %d bytes\n",
                hw->bufsize);
         return -1;
     }

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

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

     qemu_put_buffer (wav->f, hdr, sizeof (hdr));
     return 0;
 }

 static void wav_fini_out (HWVoiceOut *hw)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
     int stereo = hw->info.nchannels == 2;
     uint8_t rlen[4];
     uint8_t dlen[4];
     uint32_t rifflen = (wav->total_samples << stereo) + 36;
     uint32_t datalen = wav->total_samples << stereo;

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

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

     qemu_fseek (wav->f, 4, SEEK_SET);
     qemu_put_buffer (wav->f, rlen, 4);

     qemu_fseek (wav->f, 32, SEEK_CUR);
     qemu_put_buffer (wav->f, dlen, 4);

     fclose (wav->f);
     wav->f = NULL;

     qemu_free (wav->pcm_buf);
     wav->pcm_buf = NULL;
 }

 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
 {
     (void) hw;
     (void) cmd;
     return 0;
 }

 static void *wav_audio_init (void)
 {
     return &conf;
 }

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

 struct audio_option wav_options[] = {
     {"PATH", AUD_OPT_STR, &conf.wav_path,
      "Path to wave file", NULL, 0},
     {NULL, 0, NULL, NULL, NULL, 0}
 };

 struct audio_pcm_ops wav_pcm_ops = {
     wav_init_out,
     wav_fini_out,
     wav_run_out,
     wav_write_out,
     wav_ctl_out,

     NULL,
     NULL,
     NULL,
     NULL,
     NULL
 };

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

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

	typedef struct WAVVoiceOut {
	HWVoiceOut hw;
	QEMUFile *f;
	int64_t old_ticks;
	void *pcm_buf;
	int total_samples;
	} WAVVoiceOut;

	static struct {
	const char *wav_path;
	} conf = {
	.wav_path = "qemu.wav"
	};

	static int wav_run_out (HWVoiceOut *hw)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	int rpos, live, decr, samples;
	uint8_t *dst;
	st_sample_t *src;
	int64_t now = qemu_get_clock (vm_clock);
	int64_t ticks = now - wav->old_ticks;
	int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;

	if (bytes > INT_MAX) {
	samples = INT_MAX >> hw->info.shift;
	}
	else {
	samples = bytes >> hw->info.shift;
	}

	live = audio_pcm_hw_get_live_out (hw);
	if (!live) {
	return 0;
	}

	wav->old_ticks = now;
	decr = audio_MIN (live, samples);
	samples = decr;
	rpos = hw->rpos;
	while (samples) {
	int left_till_end_samples = hw->samples - rpos;
	int convert_samples = audio_MIN (samples, left_till_end_samples);

	src = hw->mix_buf + rpos;
	dst = advance (wav->pcm_buf, rpos << hw->info.shift);

	hw->clip (dst, src, convert_samples);
	qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
	mixeng_clear (src, convert_samples);

	rpos = (rpos + convert_samples) % hw->samples;
	samples -= convert_samples;
	wav->total_samples += convert_samples;
	}

	hw->rpos = rpos;
	return decr;
	}

	static int wav_write_out (SWVoiceOut sw, void buf, int len)
	{
	return audio_pcm_sw_write (sw, buf, len);
	}

	/* 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, int freq, int nchannels, audfmt_e fmt)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	int bits16;
	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
	};

	freq = audio_state.fixed_freq_out;
	fmt = audio_state.fixed_fmt_out;
	nchannels = audio_state.fixed_channels_out;

	switch (fmt) {
	case AUD_FMT_S8:
	case AUD_FMT_U8:
	bits16 = 0;
	break;

	case AUD_FMT_S16:
	case AUD_FMT_U16:
	bits16 = 1;
	break;

	default:
	dolog ("Internal logic error bad format %d\n", fmt);
	return -1;
	}

	hdr[34] = bits16 ? 0x10 : 0x08;
	audio_pcm_init_info (
	&hw->info,
	freq,
	nchannels,
	bits16 ? AUD_FMT_S16 : AUD_FMT_U8,
	audio_need_to_swap_endian (0)
	);
	hw->bufsize = 4096;
	wav->pcm_buf = qemu_mallocz (hw->bufsize);
	if (!wav->pcm_buf) {
	dolog ("Can not initialize WAV buffer of %d bytes\n",
	hw->bufsize);
	return -1;
	}

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

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

	qemu_put_buffer (wav->f, hdr, sizeof (hdr));
	return 0;
	}

	static void wav_fini_out (HWVoiceOut *hw)
	{
	WAVVoiceOut wav = (WAVVoiceOut ) hw;
	int stereo = hw->info.nchannels == 2;
	uint8_t rlen[4];
	uint8_t dlen[4];
	uint32_t rifflen = (wav->total_samples << stereo) + 36;
	uint32_t datalen = wav->total_samples << stereo;

	if (!wav->f \|\| !hw->active) {
	return;
	}

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

	qemu_fseek (wav->f, 4, SEEK_SET);
	qemu_put_buffer (wav->f, rlen, 4);

	qemu_fseek (wav->f, 32, SEEK_CUR);
	qemu_put_buffer (wav->f, dlen, 4);

	fclose (wav->f);
	wav->f = NULL;

	qemu_free (wav->pcm_buf);
	wav->pcm_buf = NULL;
	}

	static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
	{
	(void) hw;
	(void) cmd;
	return 0;
	}

	static void *wav_audio_init (void)
	{
	return &conf;
	}

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

	struct audio_option wav_options[] = {
	{"PATH", AUD_OPT_STR, &conf.wav_path,
	"Path to wave file", NULL, 0},
	{NULL, 0, NULL, NULL, NULL, 0}
	};

	struct audio_pcm_ops wav_pcm_ops = {
	wav_init_out,
	wav_fini_out,
	wav_run_out,
	wav_write_out,
	wav_ctl_out,

	NULL,
	NULL,
	NULL,
	NULL,
	NULL
	};

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