From 3e31375378f40558f1ee7c258f3cc63c85596bfc Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 9 Nov 2010 17:29:46 +0100 Subject: spice: add audio Add support for the spice audio interface. With this patch applied audio can be forwarded over the network from/to the spice client. Both recording and playback is supported. The driver is first in the driver list, but the can_be_default flag is set only in case spice is active. So if you have the spice protocol enabled the spice audio driver is the default one, otherwise whatever comes first after spice in the list. Overriding the default using QEMU_AUDIO_DRV works in any case. [ v2: audio codestyle: add spaces before open parenthesis ] [ v2: add const to silence array ] Signed-off-by: Gerd Hoffmann Cc: malc Signed-off-by: malc --- audio/audio.c | 3 + audio/audio_int.h | 1 + audio/spiceaudio.c | 327 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 331 insertions(+) create mode 100644 audio/spiceaudio.c (limited to 'audio') diff --git a/audio/audio.c b/audio/audio.c index ad51077f32..ade342e856 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -44,6 +44,9 @@ that we generate the list. */ static struct audio_driver *drvtab[] = { +#ifdef CONFIG_SPICE + &spice_audio_driver, +#endif CONFIG_AUDIO_DRIVERS &no_audio_driver, &wav_audio_driver diff --git a/audio/audio_int.h b/audio/audio_int.h index d8560b662b..d66f2c3bf6 100644 --- a/audio/audio_int.h +++ b/audio/audio_int.h @@ -209,6 +209,7 @@ extern struct audio_driver coreaudio_audio_driver; extern struct audio_driver dsound_audio_driver; extern struct audio_driver esd_audio_driver; extern struct audio_driver pa_audio_driver; +extern struct audio_driver spice_audio_driver; extern struct audio_driver winwave_audio_driver; extern struct mixeng_volume nominal_volume; diff --git a/audio/spiceaudio.c b/audio/spiceaudio.c new file mode 100644 index 0000000000..51ba53a39d --- /dev/null +++ b/audio/spiceaudio.c @@ -0,0 +1,327 @@ +#include "hw/hw.h" +#include "qemu-timer.h" +#include "ui/qemu-spice.h" + +#define AUDIO_CAP "spice" +#include "audio.h" +#include "audio_int.h" + +#define LINE_IN_SAMPLES 1024 +#define LINE_OUT_SAMPLES 1024 + +typedef struct SpiceRateCtl { + int64_t start_ticks; + int64_t bytes_sent; +} SpiceRateCtl; + +typedef struct SpiceVoiceOut { + HWVoiceOut hw; + SpicePlaybackInstance sin; + SpiceRateCtl rate; + int active; + uint32_t *frame; + uint32_t *fpos; + uint32_t fsize; +} SpiceVoiceOut; + +typedef struct SpiceVoiceIn { + HWVoiceIn hw; + SpiceRecordInstance sin; + SpiceRateCtl rate; + int active; + uint32_t samples[LINE_IN_SAMPLES]; +} SpiceVoiceIn; + +static const SpicePlaybackInterface playback_sif = { + .base.type = SPICE_INTERFACE_PLAYBACK, + .base.description = "playback", + .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR, + .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR, +}; + +static const SpiceRecordInterface record_sif = { + .base.type = SPICE_INTERFACE_RECORD, + .base.description = "record", + .base.major_version = SPICE_INTERFACE_RECORD_MAJOR, + .base.minor_version = SPICE_INTERFACE_RECORD_MINOR, +}; + +static void *spice_audio_init (void) +{ + if (!using_spice) { + return NULL; + } + return &spice_audio_init; +} + +static void spice_audio_fini (void *opaque) +{ + /* nothing */ +} + +static void rate_start (SpiceRateCtl *rate) +{ + memset (rate, 0, sizeof (*rate)); + rate->start_ticks = qemu_get_clock (vm_clock); +} + +static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate) +{ + int64_t now; + int64_t ticks; + int64_t bytes; + int64_t samples; + + now = qemu_get_clock (vm_clock); + ticks = now - rate->start_ticks; + bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ()); + samples = (bytes - rate->bytes_sent) >> info->shift; + if (samples < 0 || samples > 65536) { + fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples); + rate_start (rate); + samples = 0; + } + rate->bytes_sent += samples << info->shift; + return samples; +} + +/* playback */ + +static int line_out_init (HWVoiceOut *hw, struct audsettings *as) +{ + SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); + struct audsettings settings; + + settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ; + settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN; + settings.fmt = AUD_FMT_S16; + settings.endianness = AUDIO_HOST_ENDIANNESS; + + audio_pcm_init_info (&hw->info, &settings); + hw->samples = LINE_OUT_SAMPLES; + out->active = 0; + + out->sin.base.sif = &playback_sif.base; + qemu_spice_add_interface (&out->sin.base); + return 0; +} + +static void line_out_fini (HWVoiceOut *hw) +{ + SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); + + spice_server_remove_interface (&out->sin.base); +} + +static int line_out_run (HWVoiceOut *hw, int live) +{ + SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); + int rpos, decr; + int samples; + + if (!live) { + return 0; + } + + decr = rate_get_samples (&hw->info, &out->rate); + decr = audio_MIN (live, decr); + + samples = decr; + rpos = hw->rpos; + while (samples) { + int left_till_end_samples = hw->samples - rpos; + int len = audio_MIN (samples, left_till_end_samples); + + if (!out->frame) { + spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize); + out->fpos = out->frame; + } + if (out->frame) { + len = audio_MIN (len, out->fsize); + hw->clip (out->fpos, hw->mix_buf + rpos, len); + out->fsize -= len; + out->fpos += len; + if (out->fsize == 0) { + spice_server_playback_put_samples (&out->sin, out->frame); + out->frame = out->fpos = NULL; + } + } + rpos = (rpos + len) % hw->samples; + samples -= len; + } + hw->rpos = rpos; + return decr; +} + +static int line_out_write (SWVoiceOut *sw, void *buf, int len) +{ + return audio_pcm_sw_write (sw, buf, len); +} + +static int line_out_ctl (HWVoiceOut *hw, int cmd, ...) +{ + SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw); + + switch (cmd) { + case VOICE_ENABLE: + if (out->active) { + break; + } + out->active = 1; + rate_start (&out->rate); + spice_server_playback_start (&out->sin); + break; + case VOICE_DISABLE: + if (!out->active) { + break; + } + out->active = 0; + if (out->frame) { + memset (out->fpos, 0, out->fsize << 2); + spice_server_playback_put_samples (&out->sin, out->frame); + out->frame = out->fpos = NULL; + } + spice_server_playback_stop (&out->sin); + break; + } + return 0; +} + +/* record */ + +static int line_in_init (HWVoiceIn *hw, struct audsettings *as) +{ + SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); + struct audsettings settings; + + settings.freq = SPICE_INTERFACE_RECORD_FREQ; + settings.nchannels = SPICE_INTERFACE_RECORD_CHAN; + settings.fmt = AUD_FMT_S16; + settings.endianness = AUDIO_HOST_ENDIANNESS; + + audio_pcm_init_info (&hw->info, &settings); + hw->samples = LINE_IN_SAMPLES; + in->active = 0; + + in->sin.base.sif = &record_sif.base; + qemu_spice_add_interface (&in->sin.base); + return 0; +} + +static void line_in_fini (HWVoiceIn *hw) +{ + SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); + + spice_server_remove_interface (&in->sin.base); +} + +static int line_in_run (HWVoiceIn *hw) +{ + SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); + int num_samples; + int ready; + int len[2]; + uint64_t delta_samp; + const uint32_t *samples; + + if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) { + return 0; + } + + delta_samp = rate_get_samples (&hw->info, &in->rate); + num_samples = audio_MIN (num_samples, delta_samp); + + ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples); + samples = in->samples; + if (ready == 0) { + static const uint32_t silence[LINE_IN_SAMPLES]; + samples = silence; + ready = LINE_IN_SAMPLES; + } + + num_samples = audio_MIN (ready, num_samples); + + if (hw->wpos + num_samples > hw->samples) { + len[0] = hw->samples - hw->wpos; + len[1] = num_samples - len[0]; + } else { + len[0] = num_samples; + len[1] = 0; + } + + hw->conv (hw->conv_buf + hw->wpos, samples, len[0], &nominal_volume); + + if (len[1]) { + hw->conv (hw->conv_buf, samples + len[0], len[1], + &nominal_volume); + } + + hw->wpos = (hw->wpos + num_samples) % hw->samples; + + return num_samples; +} + +static int line_in_read (SWVoiceIn *sw, void *buf, int size) +{ + return audio_pcm_sw_read (sw, buf, size); +} + +static int line_in_ctl (HWVoiceIn *hw, int cmd, ...) +{ + SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); + + switch (cmd) { + case VOICE_ENABLE: + if (in->active) { + break; + } + in->active = 1; + rate_start (&in->rate); + spice_server_record_start (&in->sin); + break; + case VOICE_DISABLE: + if (!in->active) { + break; + } + in->active = 0; + spice_server_record_stop (&in->sin); + break; + } + return 0; +} + +static struct audio_option audio_options[] = { + { /* end of list */ }, +}; + +static struct audio_pcm_ops audio_callbacks = { + .init_out = line_out_init, + .fini_out = line_out_fini, + .run_out = line_out_run, + .write = line_out_write, + .ctl_out = line_out_ctl, + + .init_in = line_in_init, + .fini_in = line_in_fini, + .run_in = line_in_run, + .read = line_in_read, + .ctl_in = line_in_ctl, +}; + +struct audio_driver spice_audio_driver = { + .name = "spice", + .descr = "spice audio driver", + .options = audio_options, + .init = spice_audio_init, + .fini = spice_audio_fini, + .pcm_ops = &audio_callbacks, + .max_voices_out = 1, + .max_voices_in = 1, + .voice_size_out = sizeof (SpiceVoiceOut), + .voice_size_in = sizeof (SpiceVoiceIn), +}; + +void qemu_spice_audio_init (void) +{ + spice_audio_driver.can_be_default = 1; +} -- cgit v1.2.1