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cooleyes
Joined: 18 May 2006
Posts: 125
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 Posted: Thu May 17, 2007 7:33 pm Post subject: now,we can use libaudiocodec to decode atrac3 and atrac3plus |
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hi, all
I just found out how to decode atrac3 and atrac3plus using libaudiocodec now!
here is some sample code for decode atrac3 and atrac3plus in AT3 or AA3 file:
AT3 file decode
| Code: |
#include <pspkernel.h>
#include <pspctrl.h>
#include <pspdisplay.h>
#include <pspdebug.h>
#include <psppower.h>
#include <stdio.h>
#include <stdlib.h>
#include <pspkernel.h>
#include <pspctrl.h>
#include <psppower.h>
#include <pspdebug.h>
#include <psprtc.h>
#include <pspsdk.h>
#include <pspaudiocodec.h>
#include <pspaudio.h>
#include <string.h>
#include <malloc.h>
int SetupCallbacks();
PSP_MODULE_INFO("AT3 decodeTest", 0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);
__attribute__ ((constructor))
void loaderInit(){
pspKernelSetKernelPC();
pspSdkInstallNoDeviceCheckPatch();
pspSdkInstallNoPlainModuleCheckPatch();
pspSdkInstallKernelLoadModulePatch();
}
SceCtrlData input;
#define TYPE_ATRAC3 0x270
#define TYPE_ATRAC3PLUS 0xFFFE
unsigned long at3_codec_buffer[65] __attribute__((aligned(64)));
short at3_mix_buffer[2048 * 2] __attribute__((aligned(64)));
SceUID at3_handle;
u16 at3_type;
u8* at3_data_buffer;
u16 at3_data_align;
u32 at3_sample_per_frame;
u16 at3_channel_mode;
u8 at3_at3plus_flagdata[2];
u32 at3_data_start;
u32 at3_data_size;
u8 at3_getEDRAM;
u32 at3_channels;
u32 at3_samplerate;
int main(void)
{
SetupCallbacks();
int result = pspSdkLoadStartModule("flash0:/kd/audiocodec.prx", PSP_MEMORY_PARTITION_KERNEL);
pspSdkFixupImports(result);
SceUID at3_handle = sceIoOpen("ms0:/Test.AT3", PSP_O_RDONLY, 0777);
if ( ! at3_handle )
goto wait;
u32 riff_header[2];
if ( sceIoRead( at3_handle, riff_header, 8 ) != 8 )
goto wait;
if ( riff_header[0] != 0x46464952 )
goto wait;
u32 wavefmt_header[3];
if ( sceIoRead( at3_handle, wavefmt_header, 12 ) != 12 )
goto wait;
if ( wavefmt_header[0] != 0x45564157 || wavefmt_header[1] != 0x20746D66 )
goto wait;
u8* wavefmt_data = (u8*)malloc(wavefmt_header[2]);
if ( wavefmt_data == NULL )
goto wait;
if ( sceIoRead( at3_handle, wavefmt_data, wavefmt_header[2] ) != wavefmt_header[2] ) {
free(wavefmt_data);
goto wait;
}
at3_type = *((u16*)wavefmt_data);
at3_channels = *((u16*)(wavefmt_data+2));
at3_samplerate = *((u32*)(wavefmt_data+4));
at3_data_align = *((u16*)(wavefmt_data+12));
if ( at3_type == TYPE_ATRAC3PLUS) {
at3_at3plus_flagdata[0] = wavefmt_data[42];
at3_at3plus_flagdata[1] = wavefmt_data[43];
}
free(wavefmt_data);
u32 data_header[2];
if ( sceIoRead( at3_handle, data_header, 8 ) != 8 )
goto wait;
while(data_header[0] != 0x61746164 ) {
sceIoLseek32(at3_handle, data_header[1], PSP_SEEK_CUR);
if ( sceIoRead( at3_handle, data_header, 8 ) != 8 )
goto wait;
}
at3_data_start = sceIoLseek32(at3_handle, 0, PSP_SEEK_CUR);
at3_data_size = data_header[1];
if ( at3_data_size % at3_data_align != 0 )
goto wait;
memset(at3_codec_buffer, 0, sizeof(at3_codec_buffer));
if ( at3_type == TYPE_ATRAC3 ) {
at3_channel_mode = 0x0;
if ( at3_data_align == 0xC0 ) // atract3 have 3 bitrate, 132k,105k,66k, 132k align=0x180, 105k align = 0x130, 66k align = 0xc0
at3_channel_mode = 0x1;
at3_sample_per_frame = 1024;
at3_data_buffer = (u8*)memalign(64, 0x180);
if ( at3_data_buffer == NULL)
goto wait;
at3_codec_buffer[26] = 0x20;
if ( sceAudiocodecCheckNeedMem(at3_codec_buffer, 0x1001) < 0 )
goto wait;
if ( sceAudiocodecGetEDRAM(at3_codec_buffer, 0x1001) < 0 )
goto wait;
at3_getEDRAM = 1;
at3_codec_buffer[10] = 4;
at3_codec_buffer[44] = 2;
if ( at3_data_align == 0x130 )
at3_codec_buffer[10] = 6;
if ( sceAudiocodecInit(at3_codec_buffer, 0x1001) < 0 ) {
goto wait;
}
}
else if ( at3_type == TYPE_ATRAC3PLUS ) {
at3_sample_per_frame = 2048;
int temp_size = at3_data_align+8;
int mod_64 = temp_size & 0x3f;
if (mod_64 != 0) temp_size += 64 - mod_64;
at3_data_buffer = (u8*)memalign(64, temp_size);
if ( at3_data_buffer == NULL)
goto wait;
at3_codec_buffer[5] = 0x1;
at3_codec_buffer[10] = at3_at3plus_flagdata[1];
at3_codec_buffer[10] = (at3_codec_buffer[10] << 8 ) | at3_at3plus_flagdata[0];
at3_codec_buffer[12] = 0x1;
at3_codec_buffer[14] = 0x1;
if ( sceAudiocodecCheckNeedMem(at3_codec_buffer, 0x1000) < 0 )
goto wait;
if ( sceAudiocodecGetEDRAM(at3_codec_buffer, 0x1000) < 0 )
goto wait;
at3_getEDRAM = 1;
if ( sceAudiocodecInit(at3_codec_buffer, 0x1000) < 0 ) {
goto wait;
}
}
else
goto wait;
int eof = 0;
while( !eof ) {
int samplesdecoded;
memset(at3_mix_buffer, 0, 2048*2*2);
unsigned long decode_type = 0x1001;
if ( at3_type == TYPE_ATRAC3 ) {
memset( at3_data_buffer, 0, 0x180);
if (sceIoRead( at3_handle, at3_data_buffer, at3_data_align ) != at3_data_align) {
eof = 1;
continue;
}
if ( at3_channel_mode ) {
memcpy(at3_data_buffer+at3_data_align, at3_data_buffer, at3_data_align);
}
decode_type = 0x1001;
}
else {
memset( at3_data_buffer, 0, at3_data_align+8);
at3_data_buffer[0] = 0x0F;
at3_data_buffer[1] = 0xD0;
at3_data_buffer[2] = at3_at3plus_flagdata[0];
at3_data_buffer[3] = at3_at3plus_flagdata[1];
if (sceIoRead( at3_handle, at3_data_buffer+8, at3_data_align ) != at3_data_align) {
eof = 1;
continue;
}
decode_type = 0x1000;
}
at3_codec_buffer[6] = (unsigned long)at3_data_buffer;
at3_codec_buffer[8] = (unsigned long)at3_mix_buffer;
int res = sceAudiocodecDecode(at3_codec_buffer, decode_type);
if ( res < 0 ) {
eof = 1;
continue;
}
samplesdecoded = at3_sample_per_frame;
}
wait:
if ( at3_handle ) {
sceIoClose(at3_handle);
}
if ( at3_data_buffer) {
free(at3_data_buffer);
}
if ( at3_getEDRAM ) {
sceAudiocodecReleaseEDRAM(at3_codec_buffer);
}
sceCtrlReadBufferPositive(&input, 1);
while(!(input.Buttons & PSP_CTRL_TRIANGLE))
{
sceKernelDelayThread(10000); // wait 10 milliseconds
sceCtrlReadBufferPositive(&input, 1);
}
sceKernelExitGame();
return 0;
}
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common)
{
sceKernelExitGame();
return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp)
{
int cbid;
cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
sceKernelRegisterExitCallback(cbid);
sceKernelSleepThreadCB();
return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void)
{
int thid = 0;
thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
if(thid >= 0)
{
sceKernelStartThread(thid, 0, 0);
}
return thid;
}
|
AA3 file decode:
| Code: |
#include <pspkernel.h>
#include <pspctrl.h>
#include <pspdisplay.h>
#include <pspdebug.h>
#include <psppower.h>
#include <stdio.h>
#include <stdlib.h>
#include <pspkernel.h>
#include <pspctrl.h>
#include <psppower.h>
#include <pspdebug.h>
#include <psprtc.h>
#include <pspsdk.h>
#include <pspaudiocodec.h>
#include <pspaudio.h>
#include <string.h>
#include <malloc.h>
int SetupCallbacks();
PSP_MODULE_INFO("AA3 decodeTest", 0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);
__attribute__ ((constructor))
void loaderInit(){
pspKernelSetKernelPC();
pspSdkInstallNoDeviceCheckPatch();
pspSdkInstallNoPlainModuleCheckPatch();
pspSdkInstallKernelLoadModulePatch();
}
SceCtrlData input;
#define TYPE_ATRAC3 0x270
#define TYPE_ATRAC3PLUS 0xFFFE
unsigned long aa3_codec_buffer[65] __attribute__((aligned(64)));
short aa3_mix_buffer[2048 * 2] __attribute__((aligned(64)));
SceUID aa3_handle;
u16 aa3_type;
u8* aa3_data_buffer;
u16 aa3_data_align;
u32 aa3_sample_per_frame;
u16 aa3_channel_mode;
u8 aa3_at3plus_flagdata[2];
u32 aa3_data_start;
u32 aa3_data_size;
u8 aa3_getEDRAM;
u32 aa3_channels;
u32 aa3_samplerate;
int main(void)
{
SetupCallbacks();
int result = pspSdkLoadStartModule("flash0:/kd/audiocodec.prx", PSP_MEMORY_PARTITION_KERNEL);
pspSdkFixupImports(result);
SceUID aa3_handle = sceIoOpen("ms0:/Test.AA3", PSP_O_RDONLY, 0777); // or ms0:/Test.OMA
if ( ! aa3_handle )
goto wait;
sceIoLseek32(aa3_handle, 0x0C00, PSP_SEEK_SET);
u8 ea3_header[0x60];
if ( sceIoRead( aa3_handle, ea3_header, 0x60 ) != 0x60 )
goto wait;
if ( ea3_header[0] != 0x45 || ea3_header[1] != 0x41 || ea3_header[2] != 0x33 || ea3_header[3] != 0x01 )
goto wait;
aa3_at3plus_flagdata[0] = ea3_header[0x22];
aa3_at3plus_flagdata[1] = ea3_header[0x23];
aa3_type = (ea3_header[0x22] == 0x20) ? TYPE_ATRAC3 : ((ea3_header[0x22] == 0x28) ? TYPE_ATRAC3PLUS : 0x0);
if ( aa3_type != TYPE_ATRAC3 && aa3_type != TYPE_ATRAC3PLUS )
goto wait;
aa3_channels = 2;
aa3_samplerate = 44100;
if ( aa3_type == TYPE_ATRAC3 )
aa3_data_align = ea3_header[0x23]*8;
else
aa3_data_align = (ea3_header[0x23]+1)*8;
aa3_data_start = 0x0C60;
aa3_data_size = sceIoLseek32(aa3_handle, 0, PSP_SEEK_END) - aa3_data_start;
if ( aa3_data_size % aa3_data_align != 0 )
goto wait;
sceIoLseek32(aa3_handle, aa3_data_start, PSP_SEEK_SET);
memset(aa3_codec_buffer, 0, sizeof(aa3_codec_buffer));
if ( aa3_type == TYPE_ATRAC3 ) {
aa3_channel_mode = 0x0;
if ( aa3_data_align == 0xC0 ) // atract3 have 3 bitrate, 132k,105k,66k, 132k align=0x180, 105k align = 0x130, 66k align = 0xc0
aa3_channel_mode = 0x1;
aa3_sample_per_frame = 1024;
aa3_data_buffer = (u8*)memalign(64, 0x180);
if ( aa3_data_buffer == NULL)
goto wait;
aa3_codec_buffer[26] = 0x20;
if ( sceAudiocodecCheckNeedMem(aa3_codec_buffer, 0x1001) < 0 )
goto wait;
if ( sceAudiocodecGetEDRAM(aa3_codec_buffer, 0x1001) < 0 )
goto wait;
aa3_getEDRAM = 1;
aa3_codec_buffer[10] = 4;
aa3_codec_buffer[44] = 2;
if ( aa3_data_align == 0x130 )
aa3_codec_buffer[10] = 6;
if ( sceAudiocodecInit(aa3_codec_buffer, 0x1001) < 0 ) {
goto wait;
}
}
else if ( aa3_type == TYPE_ATRAC3PLUS ) {
aa3_sample_per_frame = 2048;
int temp_size = aa3_data_align+8;
int mod_64 = temp_size & 0x3f;
if (mod_64 != 0) temp_size += 64 - mod_64;
aa3_data_buffer = (u8*)memalign(64, temp_size);
if ( aa3_data_buffer == NULL)
goto wait;
aa3_codec_buffer[5] = 0x1;
aa3_codec_buffer[10] = aa3_at3plus_flagdata[1];
aa3_codec_buffer[10] = (aa3_codec_buffer[10] << 8 ) | aa3_at3plus_flagdata[0];
aa3_codec_buffer[12] = 0x1;
aa3_codec_buffer[14] = 0x1;
if ( sceAudiocodecCheckNeedMem(aa3_codec_buffer, 0x1000) < 0 )
goto wait;
if ( sceAudiocodecGetEDRAM(aa3_codec_buffer, 0x1000) < 0 )
goto wait;
aa3_getEDRAM = 1;
if ( sceAudiocodecInit(aa3_codec_buffer, 0x1000) < 0 ) {
goto wait;
}
}
else
goto wait;
int eof = 0;
while( !eof ) {
int samplesdecoded;
memset(aa3_mix_buffer, 0, 2048*2*2);
unsigned long decode_type = 0x1001;
if ( aa3_type == TYPE_ATRAC3 ) {
memset( aa3_data_buffer, 0, 0x180);
if (sceIoRead( aa3_handle, aa3_data_buffer, aa3_data_align ) != aa3_data_align) {
eof = 1;
continue;
}
if ( aa3_channel_mode ) {
memcpy(aa3_data_buffer+aa3_data_align, aa3_data_buffer, aa3_data_align);
}
decode_type = 0x1001;
}
else {
memset( aa3_data_buffer, 0, aa3_data_align+8);
aa3_data_buffer[0] = 0x0F;
aa3_data_buffer[1] = 0xD0;
aa3_data_buffer[2] = aa3_at3plus_flagdata[0];
aa3_data_buffer[3] = aa3_at3plus_flagdata[1];
if (sceIoRead( aa3_handle, aa3_data_buffer+8, aa3_data_align ) != aa3_data_align) {
eof = 1;
continue;
}
decode_type = 0x1000;
}
aa3_codec_buffer[6] = (unsigned long)aa3_data_buffer;
aa3_codec_buffer[8] = (unsigned long)aa3_mix_buffer;
int res = sceAudiocodecDecode(aa3_codec_buffer, decode_type);
if ( res < 0 ) {
eof = 1;
continue;
}
samplesdecoded = aa3_sample_per_frame;
}
wait:
if ( aa3_handle ) {
sceIoClose(aa3_handle);
}
if ( aa3_data_buffer) {
free(aa3_data_buffer);
}
if ( aa3_getEDRAM ) {
sceAudiocodecReleaseEDRAM(aa3_codec_buffer);
}
sceCtrlReadBufferPositive(&input, 1);
while(!(input.Buttons & PSP_CTRL_TRIANGLE))
{
sceKernelDelayThread(10000); // wait 10 milliseconds
sceCtrlReadBufferPositive(&input, 1);
}
sceKernelExitGame();
return 0;
}
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common)
{
sceKernelExitGame();
return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp)
{
int cbid;
cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
sceKernelRegisterExitCallback(cbid);
sceKernelSleepThreadCB();
return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void)
{
int thid = 0;
thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
if(thid >= 0)
{
sceKernelStartThread(thid, 0, 0);
}
return thid;
}
|
ps :
thanks for hitchhikr's help,
he is the first one who found out how to use libaudiocodec to decode 132k atrac3. |
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jockyw2001
Joined: 29 Sep 2005
Posts: 339
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| Posted: Thu May 17, 2007 10:05 pm Post subject: |
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Very cool :)
I wonder if MP3 decoding can be done similar? |
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cooleyes
Joined: 18 May 2006
Posts: 125
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| Posted: Thu May 17, 2007 10:20 pm Post subject: |
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| jockyw2001 wrote: | Very cool :)
I wonder if MP3 decoding can be done similar? |
I am trying to find out how to decode MP3 and AAC,
but I need some time to do this. |
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Insert_witty_name
Joined: 10 May 2006
Posts: 376
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| Posted: Thu May 17, 2007 10:23 pm Post subject: |
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Excellent, another format down.
MP3 should be possible, I've tried it myself but to no avail.
Maybe that's cooleyes next step? |
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danzel
Joined: 04 Nov 2005
Posts: 182
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| Posted: Fri May 18, 2007 6:26 am Post subject: |
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| Awesome stuff :D |
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dr_watson
Joined: 28 Nov 2005
Posts: 42
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| Posted: Sat May 19, 2007 11:41 pm Post subject: |
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| Wow! This is really nice! Excellent work! |
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Cpasjuste
Joined: 29 May 2005
Posts: 214
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| Posted: Sun May 20, 2007 8:04 am Post subject: |
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| Yup, thanks for the work guys, i will probably test this in my app :) |
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SamuraiX
Joined: 31 Jan 2006
Posts: 76
Location: USA
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| Posted: Mon May 21, 2007 3:02 am Post subject: |
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| Nice one! I could definately use this in my applications. Perhaps this should be added to the SDK audio samples unless my view is out of date then I should update ;p |
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Brunni
Joined: 08 Oct 2005
Posts: 186
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| Posted: Tue May 22, 2007 3:06 am Post subject: |
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Cool :)
But does this always need KERNEL mode? I'm wondering how official games do :/
_________________
Sorry for my bad english
 Oldschool library for PSP - PC version released |
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Insert_witty_name
Joined: 10 May 2006
Posts: 376
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| Posted: Tue May 22, 2007 7:30 am Post subject: |
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It needs kernel mode.
Official games load the PRX from the game disc, not flash if I recall correctly. |
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Vincent_M
Joined: 03 Apr 2007
Posts: 73
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| Posted: Thu May 24, 2007 4:23 am Post subject: |
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| Now, how do we play/stream the file? I'm a bit new to audio/video streaming atm. Now that the file is decoded, where do we go from here? Just curious, really... |
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ACh
Joined: 03 Jun 2007
Posts: 3
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| Posted: Mon Jun 04, 2007 1:25 am Post subject: |
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If you're targeting 3.xx firmware, you should be able to use sceUtilityLoadAvModule() to get at the audio/video decoders from user mode. I personally avoid ATRAC3, but here's how I set up for AVC decoding to work on both 1.50 (psplink) and 3.40 OE-A:
| Code: | int loadav_ok = 0;
int32_t firmware_version = sceKernelDevkitVersion();
if (firmware_version >= 0x02070000) {
loadav_ok = 1;
res = sceUtilityLoadAvModule(0);
if (res < 0) {
loadav_ok = 0;
}
if (loadav_ok) {
res = sceUtilityLoadAvModule(3);
if (res < 0) {
sceUtilityUnloadAvModule(0);
loadav_ok = 0;
}
}
}
if (!loadav_ok) {
res = load_start_module("flash0:/kd/audiocodec.prx", PSP_MEMORY_PARTITION_KERNEL);
if (res < 0 && res != SCE_KERNEL_ERROR_EXCLUSIVE_LOAD) {
return NULL;
}
res = load_start_module("flash0:/kd/videocodec.prx", PSP_MEMORY_PARTITION_KERNEL);
if (res < 0 && res != SCE_KERNEL_ERROR_EXCLUSIVE_LOAD) {
return NULL;
}
res = load_start_module("flash0:/kd/mpegbase.prx", PSP_MEMORY_PARTITION_KERNEL);
if (res < 0 && res != SCE_KERNEL_ERROR_EXCLUSIVE_LOAD) {
return NULL;
}
res = load_start_module("flash0:/kd/mpeg_vsh.prx", PSP_MEMORY_PARTITION_USER);
if (res < 0 && res != SCE_KERNEL_ERROR_EXCLUSIVE_LOAD) {
return NULL;
}
} |
(Note--load_start_module() is an internal routine of mine that loads and starts the given module; it's essentially a streamlined version of pspSdkLoadStartModule(), but the latter should work just as well.) |
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