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author | 2023-10-10 11:40:56 +0000 | |
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committer | 2023-10-10 11:40:56 +0000 | |
commit | e02cda008591317b1625707ff8e115a4841aa889 (patch) | |
tree | aee302e3cf8b59ec2d32ec481be3d1afddfc8968 /audio/wavaudio.c | |
parent | cc668e6b7e0ffd8c9d130513d12053cf5eda1d3b (diff) |
Introduce Virtio-loopback epsilon release:
Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.
Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9
Diffstat (limited to 'audio/wavaudio.c')
-rw-r--r-- | audio/wavaudio.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/audio/wavaudio.c b/audio/wavaudio.c new file mode 100644 index 000000000..20e6853f8 --- /dev/null +++ b/audio/wavaudio.c @@ -0,0 +1,221 @@ +/* + * 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(&hw->info, &wav->rate, 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, + .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); |