From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:52523) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gbAkA-0008B0-8K for qemu-devel@nongnu.org; Sun, 23 Dec 2018 15:53:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gbAk9-0003Ei-3M for qemu-devel@nongnu.org; Sun, 23 Dec 2018 15:53:02 -0500 Received: from mail-wm1-x342.google.com ([2a00:1450:4864:20::342]:54758) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gbAk8-000376-Sz for qemu-devel@nongnu.org; Sun, 23 Dec 2018 15:53:01 -0500 Received: by mail-wm1-x342.google.com with SMTP id a62so9861848wmh.4 for ; Sun, 23 Dec 2018 12:52:59 -0800 (PST) From: "=?UTF-8?q?K=C5=91v=C3=A1g=C3=B3=2C=20Zolt=C3=A1n?=" Date: Sun, 23 Dec 2018 21:52:11 +0100 Message-Id: <8b28b74150934d42fef0b2e4b9d19b60700a686e.1545598229.git.DirtY.iCE.hu@gmail.com> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v2 35/52] sdlaudio: port to the new audio backend api List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann SDL2 is still a big mess, but it's probably not worse than the current version. Signed-off-by: Kővágó, Zoltán --- audio/sdlaudio.c | 136 +++++++++++++++++------------------------------ 1 file changed, 50 insertions(+), 86 deletions(-) diff --git a/audio/sdlaudio.c b/audio/sdlaudio.c index 92da4804c6..685cbc83b8 100644 --- a/audio/sdlaudio.c +++ b/audio/sdlaudio.c @@ -42,11 +42,6 @@ typedef struct SDLVoiceOut { HWVoiceOut hw; - int live; -#if USE_SEMAPHORE - int rpos; -#endif - int decr; } SDLVoiceOut; static struct SDLAudioState { @@ -252,17 +247,13 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len) SDLVoiceOut *sdl = opaque; SDLAudioState *s = &glob_sdl; HWVoiceOut *hw = &sdl->hw; - int samples = len >> hw->info.shift; if (s->exit) { return; } - while (samples) { - int to_mix, decr; - - /* dolog ("in callback samples=%d\n", samples); */ #if USE_SEMAPHORE + while (len) { sdl_wait (s, "sdl_callback"); if (s->exit) { return; @@ -271,95 +262,66 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len) if (sdl_lock (s, "sdl_callback")) { return; } - - if (audio_bug(__func__, sdl->live < 0 || sdl->live > hw->samples)) { - dolog("sdl->live=%d hw->samples=%zu\n", sdl->live, hw->samples); - return; - } - - if (!sdl->live) { - goto again; - } -#else - if (s->exit || !sdl->live) { - break; - } #endif - /* dolog ("in callback live=%d\n", live); */ - to_mix = MIN (samples, sdl->live); - decr = to_mix; - while (to_mix) { - int chunk = MIN (to_mix, hw->samples - hw->rpos); - struct st_sample *src = hw->mix_buf + hw->rpos; + while (hw->pending_emul && len) { + size_t write_len; + ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul; + if (start < 0) { + start += hw->size_emul; + } + assert(start >= 0 && start < hw->size_emul); - /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ - hw->clip (buf, src, chunk); -#if USE_SEMAPHORE - sdl->rpos = (sdl->rpos + chunk) % hw->samples; -#else - hw->rpos = (hw->rpos + chunk) % hw->samples; -#endif - to_mix -= chunk; - buf += chunk << hw->info.shift; + write_len = MIN(MIN(hw->pending_emul, len), + hw->size_emul - start); + + memcpy(buf, hw->buf_emul + start, write_len); + hw->pending_emul -= write_len; + len -= write_len; + buf += write_len; } - samples -= decr; - sdl->live -= decr; - sdl->decr += decr; #if USE_SEMAPHORE - again: if (sdl_unlock (s, "sdl_callback")) { return; } -#endif } - /* dolog ("done len=%d\n", len); */ - -#if (SDL_MAJOR_VERSION >= 2) - /* SDL2 does not clear the remaining buffer for us, so do it on our own */ - if (samples) { - memset(buf, 0, samples << hw->info.shift); - } -#endif -} - -static int sdl_run_out (HWVoiceOut *hw, int live) -{ - int decr; - SDLVoiceOut *sdl = (SDLVoiceOut *) hw; - SDLAudioState *s = &glob_sdl; - - if (sdl_lock (s, "sdl_run_out")) { - return 0; - } - - if (sdl->decr > live) { - ldebug ("sdl->decr %d live %d sdl->live %d\n", - sdl->decr, - live, - sdl->live); - } - - decr = MIN (sdl->decr, live); - sdl->decr -= decr; - -#if USE_SEMAPHORE - sdl->live = live - decr; - hw->rpos = sdl->rpos; #else - sdl->live = live; + /* clear remaining buffer that we couldn't fill with data */ + if (len) { + memset(buf, 0, len); + } #endif - - if (sdl->live > 0) { - sdl_unlock_and_post (s, "sdl_run_out"); - } - else { - sdl_unlock (s, "sdl_run_out"); - } - return decr; } +#define SDL_WRAPPER_FUNC(name, ret_type, args_decl, args, fail, unlock) \ + static ret_type glue(sdl_, name)args_decl \ + { \ + SDLAudioState *s = &glob_sdl; \ + ret_type ret; \ + \ + if (sdl_lock(s, "sdl_" #name)) { \ + fail; \ + return 0; /* implicitly casts to NULL */ \ + } \ + \ + ret = glue(audio_generic_, name)args; \ + \ + unlock(s, "sdl_" #name); \ + return ret; \ + } + +SDL_WRAPPER_FUNC(get_buffer_out, void *, (HWVoiceOut *hw, size_t *size), + (hw, size), *size = 0, sdl_unlock) +SDL_WRAPPER_FUNC(put_buffer_out_nowrite, size_t, + (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), + /*nothing*/, sdl_unlock_and_post) +SDL_WRAPPER_FUNC(write, size_t, + (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), + /* nothing */, sdl_unlock_and_post) + +#undef SDL_WRAPPER_FUNC + static void sdl_fini_out (HWVoiceOut *hw) { (void) hw; @@ -476,7 +438,9 @@ static void sdl_audio_fini (void *opaque) static struct audio_pcm_ops sdl_pcm_ops = { .init_out = sdl_init_out, .fini_out = sdl_fini_out, - .run_out = sdl_run_out, + .write = sdl_write, + .get_buffer_out = sdl_get_buffer_out, + .put_buffer_out = sdl_put_buffer_out_nowrite, .ctl_out = sdl_ctl_out, }; -- 2.20.1