| 1 |
/* |
| 2 |
* audio_amiga.cpp - Audio support, AmigaOS implementation using AHI |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2001 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
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* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
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#include "sysdeps.h" |
| 22 |
|
| 23 |
#include <exec/types.h> |
| 24 |
#include <exec/memory.h> |
| 25 |
#include <devices/ahi.h> |
| 26 |
#define __USE_SYSBASE |
| 27 |
#include <proto/exec.h> |
| 28 |
#include <proto/ahi.h> |
| 29 |
#include <inline/exec.h> |
| 30 |
#include <inline/ahi.h> |
| 31 |
|
| 32 |
#include "cpu_emulation.h" |
| 33 |
#include "main.h" |
| 34 |
#include "prefs.h" |
| 35 |
#include "user_strings.h" |
| 36 |
#include "audio.h" |
| 37 |
#include "audio_defs.h" |
| 38 |
|
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#define DEBUG 0 |
| 40 |
#include "debug.h" |
| 41 |
|
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#define D1(x) ; |
| 43 |
|
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|
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// Global variables |
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static ULONG ahi_id = AHI_DEFAULT_ID; // AHI audio ID |
| 47 |
static struct AHIAudioCtrl *ahi_ctrl = NULL; |
| 48 |
static struct AHISampleInfo sample[2]; // Two sample infos for double-buffering |
| 49 |
static struct Hook sf_hook; |
| 50 |
static int play_buf = 0; // Number of currently played buffer |
| 51 |
static long sound_buffer_size; // Size of one audio buffer in bytes |
| 52 |
static int audio_block_fetched = 0; // Number of audio blocks fetched by interrupt routine |
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|
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static bool main_mute = false; |
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static bool speaker_mute = false; |
| 56 |
static ULONG supports_volume_changes = false; |
| 57 |
static ULONG supports_stereo_panning = false; |
| 58 |
static ULONG current_main_volume; |
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static ULONG current_speaker_volume; |
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|
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|
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// Prototypes |
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static __saveds __attribute__((regparm(3))) ULONG audio_callback(struct Hook *hook /*a0*/, struct AHISoundMessage *msg /*a1*/, struct AHIAudioCtrl *ahi_ctrl /*a2*/); |
| 64 |
void audio_set_sample_rate_byval(uint32 value); |
| 65 |
void audio_set_sample_size_byval(uint32 value); |
| 66 |
void audio_set_channels_byval(uint32 value); |
| 67 |
|
| 68 |
|
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/* |
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* Initialization |
| 71 |
*/ |
| 72 |
|
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// Set AudioStatus to reflect current audio stream format |
| 74 |
static void set_audio_status_format(int sample_rate_index) |
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{ |
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AudioStatus.sample_rate = audio_sample_rates[sample_rate_index]; |
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AudioStatus.sample_size = audio_sample_sizes[0]; |
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AudioStatus.channels = audio_channel_counts[0]; |
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} |
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|
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void AudioInit(void) |
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{ |
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sample[0].ahisi_Address = sample[1].ahisi_Address = NULL; |
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|
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// Init audio status and feature flags |
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audio_channel_counts.push_back(2); |
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// set_audio_status_format(); |
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AudioStatus.mixer = 0; |
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AudioStatus.num_sources = 0; |
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audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut; |
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|
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// Sound disabled in prefs? Then do nothing |
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if (PrefsFindBool("nosound")) |
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return; |
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|
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// AHI available? |
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if (AHIBase == NULL) { |
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WarningAlert(GetString(STR_NO_AHI_WARN)); |
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return; |
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} |
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|
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// Initialize callback hook |
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sf_hook.h_Entry = (HOOKFUNC)audio_callback; |
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|
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// Read "sound" preferences |
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const char *str = PrefsFindString("sound"); |
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if (str) |
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sscanf(str, "ahi/%08lx", &ahi_id); |
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|
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// Open audio control structure |
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if ((ahi_ctrl = AHI_AllocAudio( |
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AHIA_AudioID, ahi_id, |
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AHIA_MixFreq, AudioStatus.sample_rate >> 16, |
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AHIA_Channels, 1, |
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AHIA_Sounds, 2, |
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AHIA_SoundFunc, (ULONG)&sf_hook, |
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TAG_END)) == NULL) { |
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WarningAlert(GetString(STR_NO_AHI_CTRL_WARN)); |
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return; |
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} |
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|
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ULONG max_channels, sample_rate, frequencies, sample_rate_index; |
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|
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AHI_GetAudioAttrs(ahi_id, ahi_ctrl, |
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AHIDB_MaxChannels, (ULONG) &max_channels, |
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AHIDB_Frequencies, (ULONG) &frequencies, |
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TAG_END); |
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|
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D(bug("AudioInit: max_channels=%ld frequencies=%ld\n", max_channels, frequencies)); |
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|
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for (int n=0; n<frequencies; n++) |
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{ |
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AHI_GetAudioAttrs(ahi_id, ahi_ctrl, |
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AHIDB_FrequencyArg, n, |
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AHIDB_Frequency, (ULONG) &sample_rate, |
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TAG_END); |
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|
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D(bug("AudioInit: f=%ld Hz\n", sample_rate)); |
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audio_sample_rates.push_back(sample_rate << 16); |
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} |
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|
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ULONG sample_size_bits = 16; |
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|
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D(bug("AudioInit: sampe_rates=%ld\n", audio_sample_rates.size() )); |
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|
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// get index of sample rate closest to 22050 Hz |
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AHI_GetAudioAttrs(ahi_id, ahi_ctrl, |
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AHIDB_IndexArg, 22050, |
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AHIDB_Bits, (ULONG) &sample_size_bits, |
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AHIDB_Index, (ULONG) &sample_rate_index, |
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AHIDB_Volume, (ULONG) &supports_volume_changes, |
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AHIDB_Panning, (ULONG) &supports_stereo_panning, |
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TAG_END); |
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|
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audio_sample_sizes.push_back(16); |
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|
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set_audio_status_format(sample_rate_index); |
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|
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// 2048 frames per block |
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audio_frames_per_block = 2048; |
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sound_buffer_size = (AudioStatus.sample_size >> 3) * AudioStatus.channels * audio_frames_per_block; |
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|
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// Prepare SampleInfos and load sounds (two sounds for double buffering) |
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sample[0].ahisi_Type = AudioStatus.sample_size == 16 ? AHIST_S16S : AHIST_S8S; |
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sample[0].ahisi_Length = audio_frames_per_block; |
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sample[0].ahisi_Address = AllocVec(sound_buffer_size, MEMF_PUBLIC | MEMF_CLEAR); |
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sample[1].ahisi_Type = AudioStatus.sample_size == 16 ? AHIST_S16S : AHIST_S8S; |
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sample[1].ahisi_Length = audio_frames_per_block; |
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sample[1].ahisi_Address = AllocVec(sound_buffer_size, MEMF_PUBLIC | MEMF_CLEAR); |
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if (sample[0].ahisi_Address == NULL || sample[1].ahisi_Address == NULL) |
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return; |
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|
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AHI_LoadSound(0, AHIST_DYNAMICSAMPLE, &sample[0], ahi_ctrl); |
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AHI_LoadSound(1, AHIST_DYNAMICSAMPLE, &sample[1], ahi_ctrl); |
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|
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// Set parameters |
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play_buf = 0; |
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current_main_volume = current_speaker_volume = 0x10000; |
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AHI_SetVol(0, current_speaker_volume, 0x8000, ahi_ctrl, AHISF_IMM); |
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|
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AHI_SetFreq(0, AudioStatus.sample_rate >> 16, ahi_ctrl, AHISF_IMM); |
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AHI_SetSound(0, play_buf, 0, 0, ahi_ctrl, AHISF_IMM); |
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|
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// Everything OK |
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audio_open = true; |
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} |
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|
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|
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/* |
| 190 |
* Deinitialization |
| 191 |
*/ |
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|
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void AudioExit(void) |
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{ |
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// Free everything |
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if (ahi_ctrl != NULL) { |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, FALSE, TAG_END); |
| 198 |
AHI_FreeAudio(ahi_ctrl); |
| 199 |
} |
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|
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FreeVec(sample[0].ahisi_Address); |
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FreeVec(sample[1].ahisi_Address); |
| 203 |
} |
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|
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|
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/* |
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* First source added, start audio stream |
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*/ |
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|
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void audio_enter_stream() |
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{ |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, TRUE, TAG_END); |
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} |
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|
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|
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/* |
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* Last source removed, stop audio stream |
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*/ |
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|
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void audio_exit_stream() |
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{ |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, FALSE, TAG_END); |
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} |
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|
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|
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/* |
| 227 |
* AHI sound callback, request next buffer |
| 228 |
*/ |
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|
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static __saveds __attribute__((regparm(3))) ULONG audio_callback(struct Hook *hook /*a0*/, struct AHISoundMessage *msg /*a1*/, struct AHIAudioCtrl *ahi_ctrl /*a2*/) |
| 231 |
{ |
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play_buf ^= 1; |
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|
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// New buffer available? |
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if (audio_block_fetched) |
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{ |
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audio_block_fetched--; |
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|
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if (main_mute || speaker_mute) |
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{ |
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memset(sample[play_buf].ahisi_Address, 0, sound_buffer_size); |
| 242 |
} |
| 243 |
else |
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{ |
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// Get size of audio data |
| 246 |
uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo); |
| 247 |
if (apple_stream_info) { |
| 248 |
int32 sample_count = ReadMacInt32(apple_stream_info + scd_sampleCount); |
| 249 |
|
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uint32 num_channels = ReadMacInt16(apple_stream_info + scd_numChannels); |
| 251 |
uint32 sample_size = ReadMacInt16(apple_stream_info + scd_sampleSize); |
| 252 |
uint32 sample_rate = ReadMacInt32(apple_stream_info + scd_sampleRate); |
| 253 |
|
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D(bug("stream: sample_count=%ld num_channels=%ld sample_size=%ld sample_rate=%ld\n", sample_count, num_channels, sample_size, sample_rate >> 16)); |
| 255 |
|
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// Yes, this can happen. |
| 257 |
if(sample_count != 0) { |
| 258 |
if(sample_rate != AudioStatus.sample_rate) { |
| 259 |
audio_set_sample_rate_byval(sample_rate); |
| 260 |
} |
| 261 |
if(num_channels != AudioStatus.channels) { |
| 262 |
audio_set_channels_byval(num_channels); |
| 263 |
} |
| 264 |
if(sample_size != AudioStatus.sample_size) { |
| 265 |
audio_set_sample_size_byval(sample_size); |
| 266 |
} |
| 267 |
} |
| 268 |
|
| 269 |
if (sample_count < 0) |
| 270 |
sample_count = 0; |
| 271 |
|
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int work_size = sample_count * num_channels * (sample_size>>3); |
| 273 |
D(bug("stream: work_size=%ld sound_buffer_size=%ld\n", work_size, sound_buffer_size)); |
| 274 |
|
| 275 |
if (work_size > sound_buffer_size) |
| 276 |
work_size = sound_buffer_size; |
| 277 |
|
| 278 |
// Put data into AHI buffer (convert 8-bit data unsigned->signed) |
| 279 |
if (AudioStatus.sample_size == 16) |
| 280 |
Mac2Host_memcpy(sample[play_buf].ahisi_Address, ReadMacInt32(apple_stream_info + scd_buffer), work_size); |
| 281 |
else { |
| 282 |
uint32 *p = (uint32 *)Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)); |
| 283 |
uint32 *q = (uint32 *)sample[play_buf].ahisi_Address; |
| 284 |
int r = work_size >> 2; |
| 285 |
while (r--) |
| 286 |
*q++ = *p++ ^ 0x80808080; |
| 287 |
} |
| 288 |
if (work_size != sound_buffer_size) |
| 289 |
memset((uint8 *)sample[play_buf].ahisi_Address + work_size, 0, sound_buffer_size - work_size); |
| 290 |
} |
| 291 |
} |
| 292 |
|
| 293 |
} |
| 294 |
else |
| 295 |
memset(sample[play_buf].ahisi_Address, 0, sound_buffer_size); |
| 296 |
|
| 297 |
// Play next buffer |
| 298 |
AHI_SetSound(0, play_buf, 0, 0, ahi_ctrl, 0); |
| 299 |
|
| 300 |
// Trigger audio interrupt to get new buffer |
| 301 |
if (AudioStatus.num_sources) { |
| 302 |
D1(bug("stream: triggering irq\n")); |
| 303 |
SetInterruptFlag(INTFLAG_AUDIO); |
| 304 |
TriggerInterrupt(); |
| 305 |
} |
| 306 |
return 0; |
| 307 |
} |
| 308 |
|
| 309 |
|
| 310 |
/* |
| 311 |
* MacOS audio interrupt, read next data block |
| 312 |
*/ |
| 313 |
|
| 314 |
void AudioInterrupt(void) |
| 315 |
{ |
| 316 |
D1(bug("AudioInterrupt\n")); |
| 317 |
|
| 318 |
// Get data from apple mixer |
| 319 |
if (AudioStatus.mixer) { |
| 320 |
M68kRegisters r; |
| 321 |
r.a[0] = audio_data + adatStreamInfo; |
| 322 |
r.a[1] = AudioStatus.mixer; |
| 323 |
Execute68k(audio_data + adatGetSourceData, &r); |
| 324 |
D1(bug(" GetSourceData() returns %08lx\n", r.d[0])); |
| 325 |
} else |
| 326 |
WriteMacInt32(audio_data + adatStreamInfo, 0); |
| 327 |
|
| 328 |
// Signal stream function |
| 329 |
audio_block_fetched++; |
| 330 |
D1(bug("AudioInterrupt done\n")); |
| 331 |
} |
| 332 |
|
| 333 |
|
| 334 |
/* |
| 335 |
* Set sampling parameters |
| 336 |
* "index" is an index into the audio_sample_rates[] etc. arrays |
| 337 |
* It is guaranteed that AudioStatus.num_sources == 0 |
| 338 |
*/ |
| 339 |
|
| 340 |
void audio_set_sample_rate_byval(uint32 value) |
| 341 |
{ |
| 342 |
bool changed = (AudioStatus.sample_rate != value); |
| 343 |
if(changed) |
| 344 |
{ |
| 345 |
ULONG sample_rate_index; |
| 346 |
|
| 347 |
// get index of sample rate closest to <value> Hz |
| 348 |
AHI_GetAudioAttrs(ahi_id, ahi_ctrl, |
| 349 |
AHIDB_IndexArg, value >> 16, |
| 350 |
AHIDB_Index, (ULONG) &sample_rate_index, |
| 351 |
TAG_END); |
| 352 |
|
| 353 |
D(bug(" audio_set_sample_rate_byval requested rate=%ld Hz\n", value >> 16)); |
| 354 |
|
| 355 |
AudioStatus.sample_rate = audio_sample_rates[sample_rate_index]; |
| 356 |
|
| 357 |
AHI_SetFreq(0, AudioStatus.sample_rate >> 16, ahi_ctrl, 0); |
| 358 |
} |
| 359 |
|
| 360 |
D(bug(" audio_set_sample_rate_byval rate=%ld Hz\n", AudioStatus.sample_rate >> 16)); |
| 361 |
} |
| 362 |
|
| 363 |
void audio_set_sample_size_byval(uint32 value) |
| 364 |
{ |
| 365 |
bool changed = (AudioStatus.sample_size != value); |
| 366 |
if(changed) { |
| 367 |
// AudioStatus.sample_size = value; |
| 368 |
// update_sound_parameters(); |
| 369 |
// WritePrivateProfileInt( "Audio", "SampleSize", AudioStatus.sample_size, ini_file_name ); |
| 370 |
} |
| 371 |
D(bug(" audio_set_sample_size_byval %d\n", AudioStatus.sample_size)); |
| 372 |
} |
| 373 |
|
| 374 |
void audio_set_channels_byval(uint32 value) |
| 375 |
{ |
| 376 |
bool changed = (AudioStatus.channels != value); |
| 377 |
if(changed) { |
| 378 |
// AudioStatus.channels = value; |
| 379 |
// update_sound_parameters(); |
| 380 |
// WritePrivateProfileInt( "Audio", "Channels", AudioStatus.channels, ini_file_name ); |
| 381 |
} |
| 382 |
D(bug(" audio_set_channels_byval %d\n", AudioStatus.channels)); |
| 383 |
} |
| 384 |
|
| 385 |
bool audio_set_sample_rate(int index) |
| 386 |
{ |
| 387 |
if(index >= 0 && index < audio_sample_rates.size() ) { |
| 388 |
audio_set_sample_rate_byval( audio_sample_rates[index] ); |
| 389 |
D(bug(" audio_set_sample_rate index=%ld rate=%ld\n", index, AudioStatus.sample_rate >> 16)); |
| 390 |
} |
| 391 |
|
| 392 |
return true; |
| 393 |
} |
| 394 |
|
| 395 |
bool audio_set_sample_size(int index) |
| 396 |
{ |
| 397 |
if(index >= 0 && index < audio_sample_sizes.size() ) { |
| 398 |
audio_set_sample_size_byval( audio_sample_sizes[index] ); |
| 399 |
D(bug(" audio_set_sample_size %d,%d\n", index,AudioStatus.sample_size)); |
| 400 |
} |
| 401 |
|
| 402 |
return true; |
| 403 |
} |
| 404 |
|
| 405 |
bool audio_set_channels(int index) |
| 406 |
{ |
| 407 |
if(index >= 0 && index < audio_channel_counts.size() ) { |
| 408 |
audio_set_channels_byval( audio_channel_counts[index] ); |
| 409 |
D(bug(" audio_set_channels %d,%d\n", index,AudioStatus.channels)); |
| 410 |
} |
| 411 |
|
| 412 |
return true; |
| 413 |
} |
| 414 |
|
| 415 |
|
| 416 |
/* |
| 417 |
* Get/set volume controls (volume values received/returned have the left channel |
| 418 |
* volume in the upper 16 bits and the right channel volume in the lower 16 bits; |
| 419 |
* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume")) |
| 420 |
*/ |
| 421 |
|
| 422 |
bool audio_get_main_mute(void) |
| 423 |
{ |
| 424 |
D(bug("audio_get_main_mute: mute=%ld\n", main_mute)); |
| 425 |
|
| 426 |
return main_mute; |
| 427 |
} |
| 428 |
|
| 429 |
uint32 audio_get_main_volume(void) |
| 430 |
{ |
| 431 |
D(bug("audio_get_main_volume\n")); |
| 432 |
|
| 433 |
ULONG volume = current_main_volume >> 8; // 0x10000 => 0x100 |
| 434 |
|
| 435 |
D(bug("audio_get_main_volume: volume=%08lx\n", volume)); |
| 436 |
|
| 437 |
return (volume << 16) + volume; |
| 438 |
|
| 439 |
return 0x01000100; |
| 440 |
} |
| 441 |
|
| 442 |
bool audio_get_speaker_mute(void) |
| 443 |
{ |
| 444 |
D(bug("audio_get_speaker_mute: mute=%ld\n", speaker_mute)); |
| 445 |
|
| 446 |
return speaker_mute; |
| 447 |
} |
| 448 |
|
| 449 |
uint32 audio_get_speaker_volume(void) |
| 450 |
{ |
| 451 |
D(bug("audio_get_speaker_volume: \n")); |
| 452 |
|
| 453 |
if (audio_open) |
| 454 |
{ |
| 455 |
ULONG volume = current_speaker_volume >> 8; // 0x10000 => 0x100 |
| 456 |
|
| 457 |
D(bug("audio_get_speaker_volume: volume=%08lx\n", volume)); |
| 458 |
|
| 459 |
return (volume << 16) + volume; |
| 460 |
} |
| 461 |
|
| 462 |
return 0x01000100; |
| 463 |
} |
| 464 |
|
| 465 |
void audio_set_main_mute(bool mute) |
| 466 |
{ |
| 467 |
D(bug("audio_set_main_mute: mute=%ld\n", mute)); |
| 468 |
|
| 469 |
if (mute != main_mute) |
| 470 |
{ |
| 471 |
main_mute = mute; |
| 472 |
} |
| 473 |
} |
| 474 |
|
| 475 |
void audio_set_main_volume(uint32 vol) |
| 476 |
{ |
| 477 |
D(bug("audio_set_main_volume: vol=%08lx\n", vol)); |
| 478 |
|
| 479 |
if (audio_open && supports_volume_changes) |
| 480 |
{ |
| 481 |
ULONG volume = 0x80 * ((vol >> 16) + (vol & 0xffff)); |
| 482 |
|
| 483 |
D(bug("audio_set_main_volume: volume=%08lx\n", volume)); |
| 484 |
|
| 485 |
current_main_volume = volume; |
| 486 |
|
| 487 |
AHI_SetVol(0, volume, 0x8000, ahi_ctrl, AHISF_IMM); |
| 488 |
} |
| 489 |
} |
| 490 |
|
| 491 |
void audio_set_speaker_mute(bool mute) |
| 492 |
{ |
| 493 |
D(bug("audio_set_speaker_mute: mute=%ld\n", mute)); |
| 494 |
|
| 495 |
if (mute != speaker_mute) |
| 496 |
{ |
| 497 |
speaker_mute = mute; |
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
void audio_set_speaker_volume(uint32 vol) |
| 502 |
{ |
| 503 |
D(bug("audio_set_speaker_volume: vol=%08lx\n", vol)); |
| 504 |
|
| 505 |
if (audio_open && supports_volume_changes) |
| 506 |
{ |
| 507 |
ULONG volume = 0x80 * ((vol >> 16) + (vol & 0xffff)); |
| 508 |
|
| 509 |
D(bug("audio_set_speaker_volume: volume=%08lx\n", volume)); |
| 510 |
|
| 511 |
current_speaker_volume = volume; |
| 512 |
|
| 513 |
AHI_SetVol(0, volume, 0x8000, ahi_ctrl, AHISF_IMM); |
| 514 |
} |
| 515 |
} |
