| /* Copyright (C) 2007-2008 The Android Open Source Project |
| ** |
| ** This software is licensed under the terms of the GNU General Public |
| ** License version 2, as published by the Free Software Foundation, and |
| ** may be copied, distributed, and modified under those terms. |
| ** |
| ** This program is distributed in the hope that it will be useful, |
| ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| ** GNU General Public License for more details. |
| */ |
| #include "qemu_file.h" |
| #include "goldfish_device.h" |
| #include "audio/audio.h" |
| #include "qemu_debug.h" |
| #include "android/globals.h" |
| |
| #define DEBUG 1 |
| |
| #if DEBUG |
| # define D(...) VERBOSE_PRINT(audio,__VA_ARGS__) |
| #else |
| # define D(...) ((void)0) |
| #endif |
| |
| extern void dprint(const char* fmt, ...); |
| |
| enum { |
| /* audio status register */ |
| AUDIO_INT_STATUS = 0x00, |
| /* set this to enable IRQ */ |
| AUDIO_INT_ENABLE = 0x04, |
| /* set these to specify buffer addresses */ |
| AUDIO_SET_WRITE_BUFFER_1 = 0x08, |
| AUDIO_SET_WRITE_BUFFER_2 = 0x0C, |
| /* set number of bytes in buffer to write */ |
| AUDIO_WRITE_BUFFER_1 = 0x10, |
| AUDIO_WRITE_BUFFER_2 = 0x14, |
| |
| /* true if audio input is supported */ |
| AUDIO_READ_SUPPORTED = 0x18, |
| /* buffer to use for audio input */ |
| AUDIO_SET_READ_BUFFER = 0x1C, |
| |
| /* driver writes number of bytes to read */ |
| AUDIO_START_READ = 0x20, |
| |
| /* number of bytes available in read buffer */ |
| AUDIO_READ_BUFFER_AVAILABLE = 0x24, |
| |
| /* AUDIO_INT_STATUS bits */ |
| |
| /* this bit set when it is safe to write more bytes to the buffer */ |
| AUDIO_INT_WRITE_BUFFER_1_EMPTY = 1U << 0, |
| AUDIO_INT_WRITE_BUFFER_2_EMPTY = 1U << 1, |
| AUDIO_INT_READ_BUFFER_FULL = 1U << 2, |
| }; |
| |
| struct goldfish_audio_buff { |
| uint32_t address; |
| uint32_t length; |
| uint8* data; |
| uint32_t capacity; |
| uint32_t offset; |
| }; |
| |
| |
| struct goldfish_audio_state { |
| struct goldfish_device dev; |
| // buffer flags |
| uint32_t int_status; |
| // irq enable mask for int_status |
| uint32_t int_enable; |
| |
| // address of the read buffer |
| uint32_t read_buffer; |
| // path to file or device to use for input |
| const char* input_source; |
| // true if input is a wav file |
| int input_is_wav; |
| // true if we need to convert stereo -> mono |
| int input_is_stereo; |
| // file descriptor to use for input |
| int input_fd; |
| |
| // number of bytes available in the read buffer |
| int read_buffer_available; |
| |
| // set to 1 or 2 to indicate which buffer we are writing from, or zero if both buffers are empty |
| int current_buffer; |
| |
| // current data to write |
| struct goldfish_audio_buff out_buff1[1]; |
| struct goldfish_audio_buff out_buff2[1]; |
| struct goldfish_audio_buff in_buff[1]; |
| |
| // for QEMU sound output |
| QEMUSoundCard card; |
| SWVoiceOut *voice; |
| SWVoiceIn* voicein; |
| }; |
| |
| static void |
| goldfish_audio_buff_init( struct goldfish_audio_buff* b ) |
| { |
| b->address = 0; |
| b->length = 0; |
| b->data = NULL; |
| b->capacity = 0; |
| b->offset = 0; |
| } |
| |
| static void |
| goldfish_audio_buff_reset( struct goldfish_audio_buff* b ) |
| { |
| b->offset = 0; |
| b->length = 0; |
| } |
| |
| static uint32_t |
| goldfish_audio_buff_length( struct goldfish_audio_buff* b ) |
| { |
| return b->length; |
| } |
| |
| static void |
| goldfish_audio_buff_ensure( struct goldfish_audio_buff* b, uint32_t size ) |
| { |
| if (b->capacity < size) { |
| b->data = qemu_realloc(b->data, size); |
| b->capacity = size; |
| } |
| } |
| |
| static void |
| goldfish_audio_buff_set_address( struct goldfish_audio_buff* b, uint32_t addr ) |
| { |
| b->address = addr; |
| } |
| |
| static void |
| goldfish_audio_buff_set_length( struct goldfish_audio_buff* b, uint32_t len ) |
| { |
| b->length = len; |
| b->offset = 0; |
| goldfish_audio_buff_ensure(b, len); |
| } |
| |
| static void |
| goldfish_audio_buff_read( struct goldfish_audio_buff* b ) |
| { |
| cpu_physical_memory_read(b->address, b->data, b->length); |
| } |
| |
| static void |
| goldfish_audio_buff_write( struct goldfish_audio_buff* b ) |
| { |
| cpu_physical_memory_write(b->address, b->data, b->length); |
| } |
| |
| static int |
| goldfish_audio_buff_send( struct goldfish_audio_buff* b, int free, struct goldfish_audio_state* s ) |
| { |
| int ret, write = b->length; |
| |
| if (write > free) |
| write = free; |
| |
| ret = AUD_write(s->voice, b->data + b->offset, write); |
| b->offset += ret; |
| b->length -= ret; |
| return ret; |
| } |
| |
| static int |
| goldfish_audio_buff_available( struct goldfish_audio_buff* b ) |
| { |
| return b->length - b->offset; |
| } |
| |
| static int |
| goldfish_audio_buff_recv( struct goldfish_audio_buff* b, int avail, struct goldfish_audio_state* s ) |
| { |
| int missing = b->length - b->offset; |
| int avail2 = (avail > missing) ? missing : avail; |
| int read; |
| |
| read = AUD_read(s->voicein, b->data + b->offset, avail2 ); |
| if (read == 0) |
| return 0; |
| |
| if (avail2 > 0) |
| D("%s: AUD_read(%d) returned %d", __FUNCTION__, avail2, read); |
| |
| cpu_physical_memory_write( b->address + b->offset, b->data, read ); |
| b->offset += read; |
| |
| return read; |
| } |
| |
| static void |
| goldfish_audio_buff_put( struct goldfish_audio_buff* b, QEMUFile* f ) |
| { |
| qemu_put_be32(f, b->address ); |
| qemu_put_be32(f, b->length ); |
| qemu_put_be32(f, b->offset ); |
| qemu_put_buffer(f, b->data, b->length ); |
| } |
| |
| static void |
| goldfish_audio_buff_get( struct goldfish_audio_buff* b, QEMUFile* f ) |
| { |
| b->address = qemu_get_be32(f); |
| b->length = qemu_get_be32(f); |
| b->offset = qemu_get_be32(f); |
| goldfish_audio_buff_ensure(b, b->length); |
| qemu_get_buffer(f, b->data, b->length); |
| } |
| |
| /* update this whenever you change the goldfish_audio_state structure */ |
| #define AUDIO_STATE_SAVE_VERSION 2 |
| |
| #define QFIELD_STRUCT struct goldfish_audio_state |
| QFIELD_BEGIN(audio_state_fields) |
| QFIELD_INT32(int_status), |
| QFIELD_INT32(int_enable), |
| QFIELD_INT32(read_buffer_available), |
| QFIELD_INT32(current_buffer), |
| QFIELD_END |
| |
| static void audio_state_save( QEMUFile* f, void* opaque ) |
| { |
| struct goldfish_audio_state* s = opaque; |
| |
| qemu_put_struct(f, audio_state_fields, s); |
| |
| goldfish_audio_buff_put (s->out_buff1, f); |
| goldfish_audio_buff_put (s->out_buff2, f); |
| goldfish_audio_buff_put (s->in_buff, f); |
| } |
| |
| static int audio_state_load( QEMUFile* f, void* opaque, int version_id ) |
| { |
| struct goldfish_audio_state* s = opaque; |
| int ret; |
| |
| if (version_id != AUDIO_STATE_SAVE_VERSION) |
| return -1; |
| |
| ret = qemu_get_struct(f, audio_state_fields, s); |
| if (!ret) { |
| goldfish_audio_buff_get( s->out_buff1, f ); |
| goldfish_audio_buff_get( s->out_buff2, f ); |
| goldfish_audio_buff_get (s->in_buff, f); |
| } |
| return ret; |
| } |
| |
| static void enable_audio(struct goldfish_audio_state *s, int enable) |
| { |
| // enable or disable the output voice |
| if (s->voice != NULL) { |
| AUD_set_active_out(s->voice, (enable & (AUDIO_INT_WRITE_BUFFER_1_EMPTY | AUDIO_INT_WRITE_BUFFER_2_EMPTY)) != 0); |
| goldfish_audio_buff_reset( s->out_buff1 ); |
| goldfish_audio_buff_reset( s->out_buff2 ); |
| } |
| |
| if (s->voicein) { |
| AUD_set_active_in (s->voicein, (enable & AUDIO_INT_READ_BUFFER_FULL) != 0); |
| goldfish_audio_buff_reset( s->in_buff ); |
| } |
| s->current_buffer = 0; |
| } |
| |
| static void start_read(struct goldfish_audio_state *s, uint32_t count) |
| { |
| //printf( "... goldfish audio start_read, count=%d\n", count ); |
| goldfish_audio_buff_set_length( s->in_buff, count ); |
| s->read_buffer_available = count; |
| } |
| |
| static uint32_t goldfish_audio_read(void *opaque, target_phys_addr_t offset) |
| { |
| uint32_t ret; |
| struct goldfish_audio_state *s = opaque; |
| switch(offset) { |
| case AUDIO_INT_STATUS: |
| // return current buffer status flags |
| ret = s->int_status & s->int_enable; |
| if(ret) { |
| goldfish_device_set_irq(&s->dev, 0, 0); |
| } |
| return ret; |
| |
| case AUDIO_READ_SUPPORTED: |
| D("%s: AUDIO_READ_SUPPORTED returns %d", __FUNCTION__, |
| (s->voicein != NULL)); |
| return (s->voicein != NULL); |
| |
| case AUDIO_READ_BUFFER_AVAILABLE: |
| D("%s: AUDIO_READ_BUFFER_AVAILABLE returns %d", __FUNCTION__, |
| s->read_buffer_available); |
| goldfish_audio_buff_write( s->in_buff ); |
| return s->read_buffer_available; |
| |
| default: |
| cpu_abort (cpu_single_env, "goldfish_audio_read: Bad offset %x\n", offset); |
| return 0; |
| } |
| } |
| |
| static void goldfish_audio_write(void *opaque, target_phys_addr_t offset, uint32_t val) |
| { |
| struct goldfish_audio_state *s = opaque; |
| |
| switch(offset) { |
| case AUDIO_INT_ENABLE: |
| /* enable buffer empty interrupts */ |
| D("%s: AUDIO_INT_ENABLE %d", __FUNCTION__, val ); |
| enable_audio(s, val); |
| s->int_enable = val; |
| s->int_status = (AUDIO_INT_WRITE_BUFFER_1_EMPTY | AUDIO_INT_WRITE_BUFFER_2_EMPTY); |
| goldfish_device_set_irq(&s->dev, 0, (s->int_status & s->int_enable)); |
| break; |
| case AUDIO_SET_WRITE_BUFFER_1: |
| /* save pointer to buffer 1 */ |
| D( "%s: AUDIO_SET_WRITE_BUFFER_1 %08x", __FUNCTION__, val); |
| goldfish_audio_buff_set_address( s->out_buff1, val ); |
| break; |
| case AUDIO_SET_WRITE_BUFFER_2: |
| /* save pointer to buffer 2 */ |
| D( "%s: AUDIO_SET_WRITE_BUFFER_2 %08x", __FUNCTION__, val); |
| goldfish_audio_buff_set_address( s->out_buff2, val ); |
| break; |
| case AUDIO_WRITE_BUFFER_1: |
| /* record that data in buffer 1 is ready to write */ |
| //D( "%s: AUDIO_WRITE_BUFFER_1 %08x", __FUNCTION__, val); |
| if (s->current_buffer == 0) s->current_buffer = 1; |
| goldfish_audio_buff_set_length( s->out_buff1, val ); |
| goldfish_audio_buff_read( s->out_buff1 ); |
| s->int_status &= ~AUDIO_INT_WRITE_BUFFER_1_EMPTY; |
| break; |
| case AUDIO_WRITE_BUFFER_2: |
| /* record that data in buffer 2 is ready to write */ |
| //D( "%s: AUDIO_WRITE_BUFFER_2 %08x", __FUNCTION__, val); |
| if (s->current_buffer == 0) s->current_buffer = 2; |
| goldfish_audio_buff_set_length( s->out_buff2, val ); |
| goldfish_audio_buff_read( s->out_buff2 ); |
| s->int_status &= ~AUDIO_INT_WRITE_BUFFER_2_EMPTY; |
| break; |
| |
| case AUDIO_SET_READ_BUFFER: |
| /* save pointer to the read buffer */ |
| goldfish_audio_buff_set_address( s->in_buff, val ); |
| D( "%s: AUDIO_SET_READ_BUFFER %08x", __FUNCTION__, val ); |
| break; |
| |
| case AUDIO_START_READ: |
| D( "%s: AUDIO_START_READ %d", __FUNCTION__, val ); |
| start_read(s, val); |
| s->int_status &= ~AUDIO_INT_READ_BUFFER_FULL; |
| goldfish_device_set_irq(&s->dev, 0, (s->int_status & s->int_enable)); |
| break; |
| |
| default: |
| cpu_abort (cpu_single_env, "goldfish_audio_write: Bad offset %x\n", offset); |
| } |
| } |
| |
| static void goldfish_audio_callback(void *opaque, int free) |
| { |
| struct goldfish_audio_state *s = opaque; |
| int new_status = 0; |
| |
| /* loop until free is zero or both buffers are empty */ |
| while (free && s->current_buffer) { |
| |
| /* write data in buffer 1 */ |
| while (free && s->current_buffer == 1) { |
| int written = goldfish_audio_buff_send( s->out_buff1, free, s ); |
| if (written) { |
| D("%s: sent %5d bytes to audio output (buffer 1)", __FUNCTION__, written); |
| free -= written; |
| |
| if (goldfish_audio_buff_length( s->out_buff1 ) == 0) { |
| new_status |= AUDIO_INT_WRITE_BUFFER_1_EMPTY; |
| s->current_buffer = (goldfish_audio_buff_length( s->out_buff2 ) ? 2 : 0); |
| } |
| } else { |
| break; |
| } |
| } |
| |
| /* write data in buffer 2 */ |
| while (free && s->current_buffer == 2) { |
| int written = goldfish_audio_buff_send( s->out_buff2, free, s ); |
| if (written) { |
| D("%s: sent %5d bytes to audio output (buffer 2)", __FUNCTION__, written); |
| free -= written; |
| |
| if (goldfish_audio_buff_length( s->out_buff2 ) == 0) { |
| new_status |= AUDIO_INT_WRITE_BUFFER_2_EMPTY; |
| s->current_buffer = (goldfish_audio_buff_length( s->out_buff1 ) ? 1 : 0); |
| } |
| } else { |
| break; |
| } |
| } |
| } |
| |
| if (new_status && new_status != s->int_status) { |
| s->int_status |= new_status; |
| goldfish_device_set_irq(&s->dev, 0, (s->int_status & s->int_enable)); |
| } |
| } |
| |
| static void |
| goldfish_audio_in_callback(void *opaque, int avail) |
| { |
| struct goldfish_audio_state *s = opaque; |
| int new_status = 0; |
| |
| if (goldfish_audio_buff_available( s->in_buff ) == 0 ) |
| return; |
| |
| while (avail > 0) { |
| int read = goldfish_audio_buff_recv( s->in_buff, avail, s ); |
| if (read == 0) |
| break; |
| |
| avail -= read; |
| |
| if (goldfish_audio_buff_available( s->in_buff) == 0) { |
| new_status |= AUDIO_INT_READ_BUFFER_FULL; |
| D("%s: AUDIO_INT_READ_BUFFER_FULL available=%d", |
| __FUNCTION__, goldfish_audio_buff_length( s->in_buff )); |
| break; |
| } |
| } |
| |
| if (new_status && new_status != s->int_status) { |
| s->int_status |= new_status; |
| goldfish_device_set_irq(&s->dev, 0, (s->int_status & s->int_enable)); |
| } |
| } |
| |
| static CPUReadMemoryFunc *goldfish_audio_readfn[] = { |
| goldfish_audio_read, |
| goldfish_audio_read, |
| goldfish_audio_read |
| }; |
| |
| static CPUWriteMemoryFunc *goldfish_audio_writefn[] = { |
| goldfish_audio_write, |
| goldfish_audio_write, |
| goldfish_audio_write |
| }; |
| |
| void goldfish_audio_init(uint32_t base, int id, const char* input_source) |
| { |
| struct goldfish_audio_state *s; |
| struct audsettings as; |
| |
| /* nothing to do if no audio input and output */ |
| if (!android_hw->hw_audioOutput && !android_hw->hw_audioInput) |
| return; |
| |
| s = (struct goldfish_audio_state *)qemu_mallocz(sizeof(*s)); |
| s->dev.name = "goldfish_audio"; |
| s->dev.id = id; |
| s->dev.base = base; |
| s->dev.size = 0x1000; |
| s->dev.irq_count = 1; |
| |
| AUD_register_card( "goldfish_audio", &s->card); |
| |
| as.freq = 44100; |
| as.nchannels = 2; |
| as.fmt = AUD_FMT_S16; |
| as.endianness = AUDIO_HOST_ENDIANNESS; |
| |
| if (android_hw->hw_audioOutput) { |
| s->voice = AUD_open_out ( |
| &s->card, |
| NULL, |
| "goldfish_audio", |
| s, |
| goldfish_audio_callback, |
| &as |
| ); |
| if (!s->voice) { |
| dprint("warning: opening audio output failed\n"); |
| return; |
| } |
| } |
| |
| as.freq = 8000; |
| as.nchannels = 1; |
| as.fmt = AUD_FMT_S16; |
| as.endianness = AUDIO_HOST_ENDIANNESS; |
| |
| if (android_hw->hw_audioInput) { |
| s->voicein = AUD_open_in ( |
| &s->card, |
| NULL, |
| "goldfish_audio_in", |
| s, |
| goldfish_audio_in_callback, |
| &as |
| ); |
| if (!s->voicein) { |
| dprint("warning: opening audio input failed\n"); |
| } |
| } |
| |
| goldfish_audio_buff_init( s->out_buff1 ); |
| goldfish_audio_buff_init( s->out_buff2 ); |
| goldfish_audio_buff_init( s->in_buff ); |
| |
| goldfish_device_add(&s->dev, goldfish_audio_readfn, goldfish_audio_writefn, s); |
| |
| register_savevm( "audio_state", 0, AUDIO_STATE_SAVE_VERSION, |
| audio_state_save, audio_state_load, s ); |
| } |
| |