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Playing whole song from hard disk
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@544 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing
parent
7958ea420f
commit
bb69a59a97
2 changed files with 187 additions and 35 deletions
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@ -8,13 +8,13 @@ INCLUDES=-I../../common -I../.. -I../../drivers
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TARGET = -DARCHOS_PLAYER_OLD=1
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CFLAGS = -g -Wall -m1 -nostdlib -Wstrict-prototypes -fschedule-insns -fno-builtin $(INCLUDES) $(TARGET) -DDEBUG
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CFLAGS = -g -Wall -m1 -save-temps -nostdlib -Wstrict-prototypes -fschedule-insns -fno-builtin $(INCLUDES) $(TARGET) -DDEBUG
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AFLAGS += -small -relax
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OBJS= ../../crt0.o main.o ../../drivers/i2c.o ../../drivers/mas.o \
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../../debug.o ../../kernel.o thread.o ../../common/sprintf.o \
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../../panic.o ../../system.o ../../drivers/led.o \
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../../drivers/lcd.o ../../drivers/ata.o ../../drivers/fat.o \
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../../drivers/lcd.o ata.o ../../drivers/fat.o \
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../../common/disk.o ../../common/file.o ../../common/dir.o
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%.o: %.S
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@ -52,3 +52,9 @@ install:
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thread.o: ../../thread.c
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$(CC) -O $(CFLAGS) -c $<
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ata.o: ../../drivers/ata.c
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$(CC) -O $(CFLAGS) -c $<
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main.o: main.c
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$(CC) -O $(CFLAGS) -c $<
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@ -20,6 +20,7 @@
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#include "i2c.h"
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#include "mas.h"
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#include "sh7034.h"
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#include "system.h"
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#include "debug.h"
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#include "kernel.h"
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#include "ata.h"
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@ -27,6 +28,11 @@
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#include "fat.h"
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#include "file.h"
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#include "dir.h"
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#include "panic.h"
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#ifndef MIN
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#define MIN(a, b) (((a)<(b))?(a):(b))
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#endif
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unsigned char fliptable[] =
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{
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@ -66,13 +72,17 @@ unsigned char fliptable[] =
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extern unsigned int stack[];
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/* Place the MP3 data right after the stack */
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unsigned char *mp3buf = (unsigned char *)stack;
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int mp3datalen;
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unsigned char *mp3dataptr;
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int mp3_transmitted;
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#define MP3BUF_LEN 0x100000 /* 1 Mbyte */
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unsigned char *mp3buf = (unsigned char *)stack;
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int mp3buf_write;
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int mp3buf_read;
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int last_dma_chunk_size;
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bool dma_on;
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static void mas_poll_start(unsigned int interval_in_ms);
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void setup_sci0(void)
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{
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@ -124,11 +134,12 @@ int mas_tx_ready(void)
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void init_dma(void)
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{
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SAR3 = (unsigned int) mp3buf;
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SAR3 = (unsigned int) mp3buf + mp3buf_read;
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DAR3 = 0x5FFFEC3;
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CHCR3 &= ~0x0002; /* Clear interrupt */
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CHCR3 = 0x1504; /* Single address destination, TXI0, IE=1 */
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DTCR3 = 64000;
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last_dma_chunk_size = MIN(65536, mp3buf_write - mp3buf_read);
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DTCR3 = last_dma_chunk_size & 0xffff;
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DMAOR = 0x0001; /* Enable DMA */
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}
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@ -156,6 +167,18 @@ void dma_tick(void)
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}
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}
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void bitswap(unsigned char *data, int length)
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{
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unsigned int i;
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for(i = 0;i < length;i++)
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{
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data[i] = fliptable[data[i]];
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}
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}
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struct event_queue disk_queue;
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int filling;
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int main(void)
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{
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char buf[40];
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@ -164,6 +187,11 @@ int main(void)
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DIR *d;
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struct dirent *dent;
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int f;
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int free_space_left;
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int mp3_space_left;
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int amount_to_read;
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int play_song;
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struct event *ev;
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/* Clear it all! */
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SSR1 &= ~(SCI_RDRF | SCI_ORER | SCI_PER | SCI_FER);
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@ -173,12 +201,13 @@ int main(void)
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SCR1 |= 0x40;
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SCR1 &= ~0x80;
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IPRE |= 0xf000; /* Highest priority */
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i2c_init();
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dma_on = TRUE;
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kernel_init();
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tick_add_task(dma_tick);
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set_irq_level(0);
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@ -247,27 +276,26 @@ int main(void)
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debugf("Couldn't open file\n");
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}
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i = read(f, mp3buf, 1000000);
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debugf("Read %d bytes\n", i);
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mp3buf_read = mp3buf_write = 0;
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mp3datalen = i;
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/* First read in a few seconds worth of MP3 data */
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i = read(f, mp3buf, 0x20000);
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debugf("Read %d bytes\n", i);
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ata_spindown(-1);
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debugf("bit swapping...\n");
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for(i = 0;i < mp3datalen;i++)
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{
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mp3buf[i] = fliptable[mp3buf[i]];
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}
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bitswap(mp3buf + mp3buf_write, i);
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mp3buf_write = i;
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queue_init(&disk_queue);
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mas_poll_start(1);
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while(1)
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{
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debugf("let's play...\n");
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init_dma();
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mp3dataptr = mp3buf;
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mp3_transmitted = 0;
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dma_on = TRUE;
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/* Enable Tx & TXIE */
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@ -275,9 +303,67 @@ int main(void)
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CHCR3 |= 1;
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debugf("sleeping...\n");
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sleep(1000000);
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#define MP3_LOW_WATER 0x30000
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#define MP3_CHUNK_SIZE 0x20000
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play_song = 1;
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filling = 1;
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while(play_song)
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{
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if(filling)
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{
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free_space_left = mp3buf_read - mp3buf_write;
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if(free_space_left < 0)
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free_space_left = MP3BUF_LEN + free_space_left;
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if(free_space_left <= MP3_CHUNK_SIZE)
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{
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debugf("0\n");
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ata_spindown(-1);
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filling = 0;
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continue;
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}
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amount_to_read = MIN(MP3_CHUNK_SIZE, free_space_left);
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amount_to_read = MIN(MP3BUF_LEN - mp3buf_write, amount_to_read);
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/* Read in a few seconds worth of MP3 data. We don't want to
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read too large chunks because the bitswapping will take
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too much time. We must keep the DMA happy and also give
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the other threads a chance to run. */
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debugf("R\n", i);
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i = read(f, mp3buf+mp3buf_write, amount_to_read);
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if(i)
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{
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debugf("B\n");
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bitswap(mp3buf + mp3buf_write, i);
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mp3buf_write += i;
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if(mp3buf_write >= MP3BUF_LEN)
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{
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mp3buf_write = 0;
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debugf("W\n");
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}
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}
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else
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{
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play_song = 0;
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ata_spindown(-1);
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filling = 0;
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}
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}
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else
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{
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debugf("S\n");
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ev = queue_wait(&disk_queue);
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debugf("Q\n");
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debugf("1\n");
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filling = 1;
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}
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}
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debugf("Song is finished\n");
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while(1);
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}
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#pragma interrupt
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@ -289,14 +375,74 @@ void IRQ6(void)
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#pragma interrupt
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void DEI3(void)
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{
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mp3_transmitted += 64000;
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if(mp3_transmitted < mp3datalen)
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int unplayed_space_left;
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int space_until_end_of_buffer;
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mp3buf_read += last_dma_chunk_size;
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if(mp3buf_read >= MP3BUF_LEN)
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mp3buf_read = 0;
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unplayed_space_left = mp3buf_write - mp3buf_read;
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if(unplayed_space_left < 0)
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unplayed_space_left = MP3BUF_LEN + unplayed_space_left;
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space_until_end_of_buffer = MP3BUF_LEN - mp3buf_read;
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if(!filling && unplayed_space_left < MP3_LOW_WATER)
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{
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DTCR3 = 64000;
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queue_post(&disk_queue, 1, 0);
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}
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if(unplayed_space_left)
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{
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last_dma_chunk_size = MIN(65536, unplayed_space_left);
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last_dma_chunk_size = MIN(last_dma_chunk_size, space_until_end_of_buffer);
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DTCR3 = last_dma_chunk_size & 0xffff;
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SAR3 = (unsigned int)mp3buf + mp3buf_read;
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CHCR3 &= ~0x0002;
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}
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else
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{
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debugf("No more MP3 data. Stopping.\n");
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CHCR3 = 0;
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}
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}
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static void mas_poll_start(unsigned int interval_in_ms)
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{
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unsigned int count;
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count = FREQ / 1000 / 8 * interval_in_ms;
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if(count > 0xffff)
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{
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panicf("Error! The MAS poll interval is too long (%d ms)\n",
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interval_in_ms);
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return;
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}
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/* We are using timer 1 */
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TSTR &= ~0x02; /* Stop the timer */
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TSNC &= ~0x02; /* No synchronization */
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TMDR &= ~0x02; /* Operate normally */
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TCNT1 = 0; /* Start counting at 0 */
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GRA1 = count;
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TCR1 = 0x23; /* Clear at GRA match, sysclock/8 */
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/* Enable interrupt on level 2 */
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IPRC = (IPRC & ~0x000f) | 0x0002;
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TSR1 &= ~0x02;
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TIER1 = 0xf9; /* Enable GRA match interrupt */
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TSTR |= 0x02; /* Start timer 2 */
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}
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#pragma interrupt
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void IMIA1(void)
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{
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dma_tick();
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TSR1 &= ~0x01;
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}
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