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author | Kővágó, Zoltán <dirty.ice.hu@gmail.com> | 2019-09-19 23:24:21 +0200 |
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committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-09-23 12:28:47 +0200 |
commit | 857271a29c2c0e5deb05deb540a2580d1d408b34 (patch) | |
tree | 4fc6973c058119db43306e2fbedecc007396aa12 /audio | |
parent | dc88e38fa7f7480becf34712eae41380b62aacc6 (diff) | |
download | qemu-857271a29c2c0e5deb05deb540a2580d1d408b34.zip qemu-857271a29c2c0e5deb05deb540a2580d1d408b34.tar.gz qemu-857271a29c2c0e5deb05deb540a2580d1d408b34.tar.bz2 |
audio: common rate control code for timer based outputs
This commit removes the ad-hoc rate-limiting code from noaudio and
wavaudio, and replaces them with a (slightly modified) code from
spiceaudio. This way multiple write calls (for example when the
circular buffer wraps around) do not cause problems.
Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Message-id: fd0fe5b95b13fa26d09ae77a72f99d0ea411de14.1568927990.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'audio')
-rw-r--r-- | audio/audio.c | 30 | ||||
-rw-r--r-- | audio/audio_int.h | 9 | ||||
-rw-r--r-- | audio/noaudio.c | 49 | ||||
-rw-r--r-- | audio/spiceaudio.c | 51 | ||||
-rw-r--r-- | audio/wavaudio.c | 21 |
5 files changed, 79 insertions, 81 deletions
diff --git a/audio/audio.c b/audio/audio.c index ba07fb7..fab1e35 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -2051,3 +2051,33 @@ const char *audio_get_id(QEMUSoundCard *card) return ""; } } + +void audio_rate_start(RateCtl *rate) +{ + memset(rate, 0, sizeof(RateCtl)); + rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); +} + +size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, + size_t bytes_avail) +{ + int64_t now; + int64_t ticks; + int64_t bytes; + int64_t samples; + size_t ret; + + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + ticks = now - rate->start_ticks; + bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); + samples = (bytes - rate->bytes_sent) >> info->shift; + if (samples < 0 || samples > 65536) { + AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples); + audio_rate_start(rate); + samples = 0; + } + + ret = MIN(samples << info->shift, bytes_avail); + rate->bytes_sent += ret; + return ret; +} diff --git a/audio/audio_int.h b/audio/audio_int.h index 20021df..778615c 100644 --- a/audio/audio_int.h +++ b/audio/audio_int.h @@ -242,6 +242,15 @@ void *audio_calloc (const char *funcname, int nmemb, size_t size); void audio_run(AudioState *s, const char *msg); +typedef struct RateCtl { + int64_t start_ticks; + int64_t bytes_sent; +} RateCtl; + +void audio_rate_start(RateCtl *rate); +size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, + size_t bytes_avail); + #define VOICE_ENABLE 1 #define VOICE_DISABLE 2 #define VOICE_VOLUME 3 diff --git a/audio/noaudio.c b/audio/noaudio.c index b054fd2..9f1cc67 100644 --- a/audio/noaudio.c +++ b/audio/noaudio.c @@ -33,33 +33,27 @@ typedef struct NoVoiceOut { HWVoiceOut hw; - int64_t old_ticks; + RateCtl rate; } NoVoiceOut; typedef struct NoVoiceIn { HWVoiceIn hw; - int64_t old_ticks; + RateCtl rate; } NoVoiceIn; static size_t no_write(HWVoiceOut *hw, void *buf, size_t len) { NoVoiceOut *no = (NoVoiceOut *) hw; - int64_t now; - int64_t ticks; - int64_t bytes; - - now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - ticks = now - no->old_ticks; - bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); - - no->old_ticks = now; - return MIN(len, bytes); + return audio_rate_get_bytes(&hw->info, &no->rate, len); } static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque) { + NoVoiceOut *no = (NoVoiceOut *) hw; + audio_pcm_init_info (&hw->info, as); hw->samples = 1024; + audio_rate_start(&no->rate); return 0; } @@ -70,15 +64,21 @@ static void no_fini_out (HWVoiceOut *hw) static int no_ctl_out (HWVoiceOut *hw, int cmd, ...) { - (void) hw; - (void) cmd; + NoVoiceOut *no = (NoVoiceOut *) hw; + + if (cmd == VOICE_ENABLE) { + audio_rate_start(&no->rate); + } return 0; } static int no_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) { + NoVoiceIn *no = (NoVoiceIn *) hw; + audio_pcm_init_info (&hw->info, as); hw->samples = 1024; + audio_rate_start(&no->rate); return 0; } @@ -89,25 +89,20 @@ static void no_fini_in (HWVoiceIn *hw) static size_t no_read(HWVoiceIn *hw, void *buf, size_t size) { - size_t to_clear; NoVoiceIn *no = (NoVoiceIn *) hw; + int64_t bytes = audio_rate_get_bytes(&hw->info, &no->rate, size); - int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - int64_t ticks = now - no->old_ticks; - int64_t bytes = - muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); - - no->old_ticks = now; - to_clear = MIN(bytes, size); - - audio_pcm_info_clear_buf(&hw->info, buf, to_clear >> hw->info.shift); - return to_clear; + audio_pcm_info_clear_buf(&hw->info, buf, bytes >> hw->info.shift); + return bytes; } static int no_ctl_in (HWVoiceIn *hw, int cmd, ...) { - (void) hw; - (void) cmd; + NoVoiceIn *no = (NoVoiceIn *) hw; + + if (cmd == VOICE_ENABLE) { + audio_rate_start(&no->rate); + } return 0; } diff --git a/audio/spiceaudio.c b/audio/spiceaudio.c index ff4e4dc..4ce4f94 100644 --- a/audio/spiceaudio.c +++ b/audio/spiceaudio.c @@ -40,15 +40,10 @@ #define LINE_IN_SAMPLES (256 * 4) #endif -typedef struct SpiceRateCtl { - int64_t start_ticks; - int64_t bytes_sent; -} SpiceRateCtl; - typedef struct SpiceVoiceOut { HWVoiceOut hw; SpicePlaybackInstance sin; - SpiceRateCtl rate; + RateCtl rate; int active; uint32_t *frame; uint32_t fpos; @@ -58,7 +53,7 @@ typedef struct SpiceVoiceOut { typedef struct SpiceVoiceIn { HWVoiceIn hw; SpiceRecordInstance sin; - SpiceRateCtl rate; + RateCtl rate; int active; } SpiceVoiceIn; @@ -89,32 +84,6 @@ static void spice_audio_fini (void *opaque) /* nothing */ } -static void rate_start (SpiceRateCtl *rate) -{ - memset (rate, 0, sizeof (*rate)); - rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); -} - -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_clock_get_ns(QEMU_CLOCK_VIRTUAL); - ticks = now - rate->start_ticks; - bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); - samples = (bytes - rate->bytes_sent) >> info->shift; - if (samples < 0 || samples > 65536) { - error_report("Resetting rate control (%" PRId64 " samples)", 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, @@ -154,7 +123,6 @@ static void line_out_fini (HWVoiceOut *hw) static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size) { SpiceVoiceOut *out = container_of(hw, SpiceVoiceOut, hw); - size_t decr; if (!out->frame) { spice_server_playback_get_buffer(&out->sin, &out->frame, &out->fsize); @@ -162,12 +130,10 @@ static void *line_out_get_buffer(HWVoiceOut *hw, size_t *size) } if (out->frame) { - decr = rate_get_samples(&hw->info, &out->rate); - decr = MIN(out->fsize - out->fpos, decr); - - *size = decr << hw->info.shift; + *size = audio_rate_get_bytes( + &hw->info, &out->rate, (out->fsize - out->fpos) << hw->info.shift); } else { - rate_start(&out->rate); + audio_rate_start(&out->rate); } return out->frame + out->fpos; } @@ -197,7 +163,7 @@ static int line_out_ctl (HWVoiceOut *hw, int cmd, ...) break; } out->active = 1; - rate_start (&out->rate); + audio_rate_start(&out->rate); spice_server_playback_start (&out->sin); break; case VOICE_DISABLE: @@ -273,8 +239,7 @@ static void line_in_fini (HWVoiceIn *hw) static size_t line_in_read(HWVoiceIn *hw, void *buf, size_t len) { SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw); - uint64_t delta_samp = rate_get_samples(&hw->info, &in->rate); - uint64_t to_read = MIN(len >> 2, delta_samp); + uint64_t to_read = audio_rate_get_bytes(&hw->info, &in->rate, len) >> 2; size_t ready = spice_server_record_get_samples(&in->sin, buf, to_read); /* XXX: do we need this? */ @@ -296,7 +261,7 @@ static int line_in_ctl (HWVoiceIn *hw, int cmd, ...) break; } in->active = 1; - rate_start (&in->rate); + audio_rate_start(&in->rate); spice_server_record_start (&in->sin); break; case VOICE_DISABLE: diff --git a/audio/wavaudio.c b/audio/wavaudio.c index 78af2f1..85f5ff9 100644 --- a/audio/wavaudio.c +++ b/audio/wavaudio.c @@ -35,21 +35,15 @@ typedef struct WAVVoiceOut { HWVoiceOut hw; FILE *f; - int64_t old_ticks; + 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 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - int64_t ticks = now - wav->old_ticks; - int64_t bytes = - muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); - - bytes = MIN(bytes, len); - bytes = bytes >> hw->info.shift << hw->info.shift; - wav->old_ticks = now; + int64_t bytes = audio_rate_get_bytes(&hw->info, &wav->rate, len); + assert(bytes >> hw->info.shift << hw->info.shift == bytes); if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) { dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n", @@ -130,6 +124,8 @@ static int wav_init_out(HWVoiceOut *hw, struct audsettings *as, strerror(errno)); return -1; } + + audio_rate_start(&wav->rate); return 0; } @@ -179,8 +175,11 @@ static void wav_fini_out (HWVoiceOut *hw) static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) { - (void) hw; - (void) cmd; + WAVVoiceOut *wav = (WAVVoiceOut *) hw; + + if (cmd == VOICE_ENABLE) { + audio_rate_start(&wav->rate); + } return 0; } |