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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:32 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:32 -0800 |
commit | 8b23a6c7e1aee255004dd19098d4c2462b61b849 (patch) | |
tree | 7a4d682ba51f0ff0364c5ca2509f515bdaf96de9 /hw/goldfish_audio.c | |
parent | f721e3ac031f892af46f255a47d7f54a91317b30 (diff) | |
download | external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.zip external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.tar.gz external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'hw/goldfish_audio.c')
-rw-r--r-- | hw/goldfish_audio.c | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/hw/goldfish_audio.c b/hw/goldfish_audio.c new file mode 100644 index 0000000..d0a44b5 --- /dev/null +++ b/hw/goldfish_audio.c @@ -0,0 +1,533 @@ +/* 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, ...); + +/* define USE_QEMU_AUDIO_IN to 1 to use QEMU's audio subsystem to + * implement the audio input. if 0, this will try to read a .wav file + * directly... + */ +#define USE_QEMU_AUDIO_IN 1 + +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_state { + struct goldfish_device dev; + // pointers to our two write buffers + uint32_t buffer_1, buffer_2; + uint32_t read_buffer; + // buffer flags + uint32_t int_status; + // irq enable mask for int_status + uint32_t int_enable; + +#if USE_QEMU_AUDIO_IN + uint32_t read_pos; + uint32_t read_size; +#else + // 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; +#endif + + // 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 + uint8* data_1; + uint32_t data_1_length; + uint8* data_2; + uint32_t data_2_length; + + + // for QEMU sound output + QEMUSoundCard card; + SWVoiceOut *voice; +#if USE_QEMU_AUDIO_IN + SWVoiceIn* voicein; +#endif +}; + +/* update this whenever you change the goldfish_audio_state structure */ +#define AUDIO_STATE_SAVE_VERSION 1 + +#define QFIELD_STRUCT struct goldfish_audio_state +QFIELD_BEGIN(audio_state_fields) + QFIELD_INT32(buffer_1), + QFIELD_INT32(buffer_2), + QFIELD_INT32(read_buffer), + QFIELD_INT32(int_status), + QFIELD_INT32(int_enable), +#if USE_QEMU_AUDIO_IN + QFIELD_INT32(read_pos), + QFIELD_INT32(read_size), +#endif + QFIELD_INT32(read_buffer_available), + QFIELD_INT32(current_buffer), + QFIELD_INT32(data_1_length), + QFIELD_INT32(data_2_length), +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); + + /* we can't write data_1 and data_2 directly */ + qemu_put_be32( f, s->data_1 - phys_ram_base ); + qemu_put_be32( f, s->data_2 - phys_ram_base ); +} + +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) { + s->data_1 = qemu_get_be32(f) + phys_ram_base; + s->data_2 = qemu_get_be32(f) + phys_ram_base; + } + return -1; +} + +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); + + if (s->voicein) + AUD_set_active_in (s->voicein, (enable & AUDIO_INT_READ_BUFFER_FULL) != 0); + // reset buffer information + s->data_1_length = 0; + s->data_2_length = 0; + s->current_buffer = 0; + s->read_pos = 0; +} + +#if USE_QEMU_AUDIO_IN +static void start_read(struct goldfish_audio_state *s, uint32_t count) +{ + //printf( "... goldfish audio start_read, count=%d\n", count ); + s->read_size = count; + s->read_buffer_available = 0; + s->read_pos = 0; +} +#else +static void start_read(struct goldfish_audio_state *s, uint32_t count) +{ + uint8 wav_header[44]; + int result; + + if (!s->input_source) return; + + if (s->input_fd < 0) { + s->input_fd = open(s->input_source, O_BINARY | O_RDONLY); + + if (s->input_fd < 0) { + fprintf(stderr, "goldfish_audio could not open %s for audio input\n", s->input_source); + s->input_source = NULL; // set to to avoid endless retries + return; + } + + // skip WAV header if we have a WAV file + if (s->input_is_wav) { + if (read(s->input_fd, wav_header, sizeof(wav_header)) != sizeof(wav_header)) { + fprintf(stderr, "goldfish_audio could not read WAV file header %s\n", s->input_source); + s->input_fd = -1; + s->input_source = NULL; // set to to avoid endless retries + return; + } + + // is the WAV file stereo? + s->input_is_stereo = (wav_header[22] == 2); + } else { + // assume input from an audio device is stereo + s->input_is_stereo = 1; + } + } + + uint8* buffer = (uint8*)phys_ram_base + s->read_buffer; + if (s->input_is_stereo) { + // need to read twice as much data + count *= 2; + } + +try_again: + result = read(s->input_fd, buffer, count); + if (result == 0 && s->input_is_wav) { + // end of file, so seek back to the beginning + lseek(s->input_fd, sizeof(wav_header), SEEK_SET); + goto try_again; + } + + if (result > 0 && s->input_is_stereo) { + // we need to convert stereo to mono + uint8* src = (uint8*)buffer; + uint8* dest = src; + int count = result/2; + while (count-- > 0) { + int sample1 = src[0] | (src[1] << 8); + int sample2 = src[2] | (src[3] << 8); + int sample = (sample1 + sample2) >> 1; + dst[0] = (uint8_t) sample; + dst[1] = (uint8_t)(sample >> 8); + src += 4; + dst += 2; + } + + // we reduced the number of bytes by 2 + result /= 2; + } + + s->read_buffer_available = (result > 0 ? result : 0); + s->int_status |= AUDIO_INT_READ_BUFFER_FULL; + goldfish_device_set_irq(&s->dev, 0, (s->int_status & s->int_enable)); +} +#endif + +static uint32_t goldfish_audio_read(void *opaque, target_phys_addr_t offset) +{ + uint32_t ret; + struct goldfish_audio_state *s = opaque; + offset -= s->dev.base; + 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: +#if USE_QEMU_AUDIO_IN + D("%s: AUDIO_READ_SUPPORTED returns %d", __FUNCTION__, + (s->voicein != NULL)); + return (s->voicein != NULL); +#else + return (s->input_source ? 1 : 0); +#endif + + case AUDIO_READ_BUFFER_AVAILABLE: + D("%s: AUDIO_READ_BUFFER_AVAILABLE returns %d", __FUNCTION__, + s->read_buffer_available); + 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; + offset -= s->dev.base; + + 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 */ + s->buffer_1 = val; + break; + case AUDIO_SET_WRITE_BUFFER_2: + /* save pointer to buffer 2 */ + s->buffer_2 = val; + break; + case AUDIO_WRITE_BUFFER_1: + /* record that data in buffer 1 is ready to write */ + if (s->current_buffer == 0) s->current_buffer = 1; + s->data_1 = phys_ram_base + s->buffer_1; + s->data_1_length = val; + 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 */ + if (s->current_buffer == 0) s->current_buffer = 2; + s->data_2 = phys_ram_base + s->buffer_2; + s->data_2_length = val; + s->int_status &= ~AUDIO_INT_WRITE_BUFFER_2_EMPTY; + break; + + case AUDIO_SET_READ_BUFFER: + /* save pointer to the read buffer */ + s->read_buffer = val; + D( "%s: AUDIO_SET_READ_BUFFER %p", __FUNCTION__, (void*)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 write = s->data_1_length; + if (write > free) write = free; + + int written = AUD_write(s->voice, s->data_1, write); + if (written) { + D("%s: sent %d bytes to audio output", __FUNCTION__, write); + s->data_1 += written; + s->data_1_length -= written; + free -= written; + + if (s->data_1_length == 0) { + new_status |= AUDIO_INT_WRITE_BUFFER_1_EMPTY; + s->current_buffer = (s->data_2_length ? 2 : 0); + } + } else { + break; + } + } + + /* write data in buffer 2 */ + while (free && s->current_buffer == 2) { + int write = s->data_2_length; + if (write > free) write = free; + + int written = AUD_write(s->voice, s->data_2, write); + if (written) { + D("%s: sent %d bytes to audio output", __FUNCTION__, write); + s->data_2 += written; + s->data_2_length -= written; + free -= written; + + if (s->data_2_length == 0) { + new_status |= AUDIO_INT_WRITE_BUFFER_2_EMPTY; + s->current_buffer = (s->data_1_length ? 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)); + } +} + +#if USE_QEMU_AUDIO_IN +static void +goldfish_audio_in_callback(void *opaque, int avail) +{ + struct goldfish_audio_state *s = opaque; + int new_status = 0; + + if (s->read_pos >= s->read_size) + return; + + if (0 && s->read_size > 0) + D("%s: in %d (pos=%d size=%d)", __FUNCTION__, + avail, s->read_pos, s->read_size ); + + while (avail > 0) { + int pos = s->read_pos; + int missing = s->read_size - pos; + uint8* buffer = (uint8*)phys_ram_base + s->read_buffer + pos; + int read; + int avail2 = (avail > missing) ? missing : avail; + + read = AUD_read(s->voicein, buffer, avail2); + if (read == 0) + break; + + if (avail2 > 0) + D("%s: AUD_read(%d) returned %d", __FUNCTION__, avail2, read); + + s->read_buffer_available += read; + + avail -= read; + pos += read; + if (pos == s->read_size) { + new_status |= AUDIO_INT_READ_BUFFER_FULL; + D("%s: AUDIO_INT_READ_BUFFER_FULL available=%d", __FUNCTION__, s->read_buffer_available); + } + s->read_pos = pos; + } + + 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)); + } +} +#endif /* USE_QEMU_AUDIO_IN */ + +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; + audsettings_t 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; + +#ifndef USE_QEMU_AUDIO_IN + s->input_fd = -1; + if (input_source) { + s->input_source = input_source; + char* extension = strrchr(input_source, '.'); + if (extension && strcasecmp(extension, ".wav") == 0) { + s->input_is_wav = 1; + } + } +#endif + + AUD_register_card( &glob_audio_state, "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, + s->voice, + "goldfish_audio", + s, + goldfish_audio_callback, + &as + ); + if (!s->voice) { + dprint("warning: opening audio output failed\n"); + return; + } + } + +#if USE_QEMU_AUDIO_IN + 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"); + } + } +#endif + + 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 ); +} + |