X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=frontend%2Flibretro.c;h=5a357bbfb364d1dc393a5556fb4817f2ed8f76dc;hb=350e047b2627f8e7b054f96fd545a9b920595232;hp=62acf4250a8b0cb97f9d8b217cd7b0fdc85938a0;hpb=eeb8a52bd5407c5e595aad7983944b1f16b1bbf0;p=pcsx_rearmed.git diff --git a/frontend/libretro.c b/frontend/libretro.c index 62acf425..5a357bbf 100644 --- a/frontend/libretro.c +++ b/frontend/libretro.c @@ -96,6 +96,26 @@ static int show_advanced_gpu_unai_settings = -1; static int show_other_input_settings = -1; static float mouse_sensitivity = 1.0f; +typedef enum +{ + FRAMESKIP_NONE = 0, + FRAMESKIP_AUTO, + FRAMESKIP_AUTO_THRESHOLD, + FRAMESKIP_FIXED_INTERVAL +} frameskip_type_t; + +static unsigned frameskip_type = FRAMESKIP_NONE; +static unsigned frameskip_threshold = 0; +static unsigned frameskip_interval = 0; +static unsigned frameskip_counter = 0; + +static int retro_audio_buff_active = false; +static unsigned retro_audio_buff_occupancy = 0; +static int retro_audio_buff_underrun = false; + +static unsigned retro_audio_latency = 0; +static int update_audio_latency = false; + static unsigned previous_width = 0; static unsigned previous_height = 0; @@ -1195,6 +1215,61 @@ static void set_retro_memmap(void) #endif } +static void retro_audio_buff_status_cb( + bool active, unsigned occupancy, bool underrun_likely) +{ + retro_audio_buff_active = active; + retro_audio_buff_occupancy = occupancy; + retro_audio_buff_underrun = underrun_likely; +} + +static void retro_set_audio_buff_status_cb(void) +{ + if (frameskip_type == FRAMESKIP_NONE) + { + environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL); + retro_audio_latency = 0; + } + else + { + bool calculate_audio_latency = true; + + if (frameskip_type == FRAMESKIP_FIXED_INTERVAL) + environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL); + else + { + struct retro_audio_buffer_status_callback buf_status_cb; + buf_status_cb.callback = retro_audio_buff_status_cb; + if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, + &buf_status_cb)) + { + retro_audio_buff_active = false; + retro_audio_buff_occupancy = 0; + retro_audio_buff_underrun = false; + retro_audio_latency = 0; + calculate_audio_latency = false; + } + } + + if (calculate_audio_latency) + { + /* Frameskip is enabled - increase frontend + * audio latency to minimise potential + * buffer underruns */ + uint32_t frame_time_usec = 1000000.0 / (is_pal_mode ? 50.0 : 60.0); + + /* Set latency to 6x current frame time... */ + retro_audio_latency = (unsigned)(6 * frame_time_usec / 1000); + + /* ...then round up to nearest multiple of 32 */ + retro_audio_latency = (retro_audio_latency + 0x1F) & ~0x1F; + } + } + + update_audio_latency = true; + frameskip_counter = 0; +} + static void update_variables(bool in_flight); bool retro_load_game(const struct retro_game_info *info) { @@ -1406,6 +1481,7 @@ bool retro_load_game(const struct retro_game_info *info) emu_on_new_cd(0); set_retro_memmap(); + retro_set_audio_buff_status_cb(); return true; } @@ -1476,11 +1552,43 @@ static void update_variables(bool in_flight) #ifdef GPU_PEOPS int gpu_peops_fix = 0; #endif + frameskip_type_t prev_frameskip_type; + + var.key = "pcsx_rearmed_frameskip_type"; + var.value = NULL; + + prev_frameskip_type = frameskip_type; + frameskip_type = FRAMESKIP_NONE; + pl_rearmed_cbs.frameskip = 0; + + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) + { + if (strcmp(var.value, "auto") == 0) + frameskip_type = FRAMESKIP_AUTO; + if (strcmp(var.value, "auto_threshold") == 0) + frameskip_type = FRAMESKIP_AUTO_THRESHOLD; + if (strcmp(var.value, "fixed_interval") == 0) + frameskip_type = FRAMESKIP_FIXED_INTERVAL; + } + + if (frameskip_type != 0) + pl_rearmed_cbs.frameskip = -1; + var.key = "pcsx_rearmed_frameskip_threshold"; var.value = NULL; + + frameskip_threshold = 30; + + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) + frameskip_threshold = strtol(var.value, NULL, 10); + var.key = "pcsx_rearmed_frameskip"; + var.value = NULL; + + frameskip_interval = 3; + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) - pl_rearmed_cbs.frameskip = atoi(var.value); + frameskip_interval = strtol(var.value, NULL, 10); var.value = NULL; var.key = "pcsx_rearmed_region"; @@ -2168,6 +2276,10 @@ static void update_variables(bool in_flight) GPU_open(&gpuDisp, "PCSX", NULL); } + /* Reinitialise frameskipping, if required */ + if (((frameskip_type != prev_frameskip_type))) + retro_set_audio_buff_status_cb(); + /* dfinput_activate(); */ } else @@ -2540,6 +2652,46 @@ void retro_run(void) print_internal_fps(); + /* Check whether current frame should + * be skipped */ + pl_rearmed_cbs.fskip_force = 0; + pl_rearmed_cbs.fskip_dirty = 0; + + if (frameskip_type != FRAMESKIP_NONE) + { + bool skip_frame = false; + + switch (frameskip_type) + { + case FRAMESKIP_AUTO: + skip_frame = retro_audio_buff_active && retro_audio_buff_underrun; + break; + case FRAMESKIP_AUTO_THRESHOLD: + skip_frame = retro_audio_buff_active && (retro_audio_buff_occupancy < frameskip_threshold); + break; + case FRAMESKIP_FIXED_INTERVAL: + skip_frame = true; + break; + default: + break; + } + + if (skip_frame && frameskip_counter < frameskip_interval) + pl_rearmed_cbs.fskip_force = 1; + } + + /* If frameskip/timing settings have changed, + * update frontend audio latency + * > Can do this before or after the frameskip + * check, but doing it after means we at least + * retain the current frame's audio output */ + if (update_audio_latency) + { + environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY, + &retro_audio_latency); + update_audio_latency = false; + } + input_poll_cb(); update_input(); @@ -2551,6 +2703,13 @@ void retro_run(void) stop = 0; psxCpu->Execute(); + if (pl_rearmed_cbs.fskip_dirty == 1) { + if (frameskip_counter < frameskip_interval) + frameskip_counter++; + else if (frameskip_counter >= frameskip_interval || !pl_rearmed_cbs.fskip_force) + frameskip_counter = 0; + } + video_cb((vout_fb_dirty || !vout_can_dupe || !duping_enable) ? vout_buf_ptr : NULL, vout_width, vout_height, vout_width * 2); vout_fb_dirty = 0; @@ -2863,6 +3022,15 @@ void retro_deinit(void) /* Have to reset disks struct, otherwise * fnames/flabels will leak memory */ disk_init(); + frameskip_type = FRAMESKIP_NONE; + frameskip_threshold = 0; + frameskip_interval = 0; + frameskip_counter = 0; + retro_audio_buff_active = false; + retro_audio_buff_occupancy = 0; + retro_audio_buff_underrun = false; + retro_audio_latency = 0; + update_audio_latency = false; } #ifdef VITA