[picodrive.git] / platform / psp / mp3.c

/*
 * PicoDrive
 * (C) notaz, 2007,2008
 *
 * This work is licensed under the terms of MAME license.
 * See COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <string.h>

#include <pspkernel.h>
#include <pspsdk.h>
#include <pspaudiocodec.h>
#include <kubridge.h>

#include "../../pico/pico_int.h"
#include "../../pico/sound/mix.h"
#include "../common/lprintf.h"

int mp3_last_error = 0;

static int initialized = 0;
static SceUID thread_job_sem = -1;
static SceUID thread_busy_sem = -1;
static int thread_exit = 0;

// MPEG-1, layer 3
static int bitrates[] = { 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0 };
//static int samplerates[] = { 44100, 48000, 32000, 0 };

#define MIN_INFRAME_SIZE 96
#define IN_BUFFER_SIZE (2*1024)

static unsigned long mp3_codec_struct[65] __attribute__((aligned(64)));

static unsigned char mp3_src_buffer[2][IN_BUFFER_SIZE] __attribute__((aligned(64)));
static short mp3_mix_buffer[2][1152*2] __attribute__((aligned(64)));
static int working_buf = 0;

static const char *mp3_fname = NULL;
static SceUID mp3_handle = -1;
static int mp3_src_pos = 0, mp3_src_size = 0;

static int decode_thread(SceSize args, void *argp);


static void psp_sem_lock(SceUID sem)
{
	int ret = sceKernelWaitSema(sem, 1, 0);
	if (ret < 0) lprintf("sceKernelWaitSema(%08x) failed with %08x\n", sem, ret);
}

static void psp_sem_unlock(SceUID sem)
{
	int ret = sceKernelSignalSema(sem, 1);
	if (ret < 0) lprintf("sceKernelSignalSema(%08x) failed with %08x\n", sem, ret);
}

// only accepts MPEG-1, layer3
static int find_sync_word(unsigned char *data, int len)
{
	int i;
	for (i = 0; i < len-1; i++)
	{
		if ( data[i+0] != 0xff) continue;
		if ((data[i+1] & 0xfe) == 0xfa) return i;
		i++;
	}
	return -1;
}

static int read_next_frame(int which_buffer)
{
	int i, bytes_read, frame_offset;
	int bitrate, padding, frame_size = 0;

	for (i = 0; i < 32; i++)
	{
		bytes_read = sceIoRead(mp3_handle, mp3_src_buffer[which_buffer], sizeof(mp3_src_buffer[which_buffer]));
		mp3_src_pos += bytes_read;
		if (bytes_read < MIN_INFRAME_SIZE) {
			mp3_src_pos = mp3_src_size;
			return 0; // EOF/IO failure
		}
		frame_offset = find_sync_word(mp3_src_buffer[which_buffer], bytes_read);
		if (frame_offset < 0) {
			lprintf("missing syncword, foffs=%i\n", mp3_src_pos - bytes_read);
			mp3_src_pos--;
			sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
			continue;
		}
		if (bytes_read - frame_offset < 4) {
			lprintf("syncword @ EOB, foffs=%i\n", mp3_src_pos - bytes_read);
			mp3_src_pos--;
			sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
			continue;
		}

		bitrate =  mp3_src_buffer[which_buffer][frame_offset+2] >> 4;
		padding = (mp3_src_buffer[which_buffer][frame_offset+2] & 2) >> 1;

		frame_size = 144000*bitrates[bitrate]/44100 + padding;
		if (frame_size <= 0) {
			lprintf("bad frame, foffs=%i\n", mp3_src_pos - bytes_read);
			continue; // bad frame
		}

		if (bytes_read - frame_offset < frame_size)
		{
			lprintf("unfit, foffs=%i\n", mp3_src_pos - bytes_read);
			mp3_src_pos -= bytes_read - frame_offset;
			if (mp3_src_size - mp3_src_pos < frame_size) {
				mp3_src_pos = mp3_src_size;
				return 0; // EOF
			}
			sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
			continue; // didn't fit, re-read..
		}

		if (frame_offset) {
			//lprintf("unaligned, foffs=%i, offs=%i\n", mp3_src_pos - bytes_read, frame_offset);
			memmove(mp3_src_buffer[which_buffer], mp3_src_buffer[which_buffer] + frame_offset, frame_size);
		}

		// align for next frame read
		mp3_src_pos -= bytes_read - (frame_offset + frame_size);
		sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);

		break;
	}

	return frame_size > 0 ? frame_size : -1;
}


static SceUID load_start_module(const char *prxname)
{
	SceUID mod, mod1;
	int status, ret;

	mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
	if (mod < 0) {
		lprintf("failed to load %s (%08x), trying kuKernelLoadModule\n", prxname, mod);
		mod1 = kuKernelLoadModule(prxname, 0, NULL);
		if (mod1 < 0) lprintf("kuKernelLoadModule failed with %08x\n", mod1);
		else {
			ret = sceKernelStartModule(mod1, 0, NULL, &status, 0);
			if (ret < 0) lprintf("sceKernelStartModule failed with %08x\n", ret);
			else mod = mod1;
		}
	}
	return mod;
}


int mp3_init(void)
{
	SceUID thid, mod;
	int ret;

	/* load modules */
	/* <= 1.5 (and probably some other, not sure which) fw need this to for audiocodec to work,
	 * so if it fails, assume we are just on new enough firmware and continue.. */
	load_start_module("flash0:/kd/me_for_vsh.prx");

	if (sceKernelDevkitVersion() < 0x02070010)
	     mod = load_start_module("flash0:/kd/audiocodec.prx");
	else mod = load_start_module("flash0:/kd/avcodec.prx");
	if (mod < 0) {
		ret = mod;
		mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
		if (mod < 0) goto fail;
	}

	/* audiocodec init */
	memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
	ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
	if (ret < 0) {
		lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
		goto fail;
	}

	ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
	if (ret < 0) {
		lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
		goto fail;
	}

	ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
	if (ret < 0) {
		lprintf("sceAudiocodecInit failed with %08x\n", ret);
		goto fail1;
	}

	/* thread and stuff */
	thread_job_sem = sceKernelCreateSema("p_mp3job_sem", 0, 0, 1, NULL);
	if (thread_job_sem < 0) {
		lprintf("sceKernelCreateSema() failed: %08x\n", thread_job_sem);
		ret = thread_job_sem;
		goto fail1;
	}

	thread_busy_sem = sceKernelCreateSema("p_mp3busy_sem", 0, 1, 1, NULL);
	if (thread_busy_sem < 0) {
		lprintf("sceKernelCreateSema() failed: %08x\n", thread_busy_sem);
		ret = thread_busy_sem;
		goto fail2;
	}

	/* use slightly higher prio then main */
	thread_exit = 0;
	thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, NULL);
	if (thid < 0) {
		lprintf("failed to create decode thread: %08x\n", thid);
		ret = thid;
		goto fail3;
	}
	ret = sceKernelStartThread(thid, 0, 0);
	if (ret < 0) {
		lprintf("failed to start decode thread: %08x\n", ret);
		goto fail3;
	}

	mp3_last_error = 0;
	initialized = 1;
	return 0;

fail3:
	sceKernelDeleteSema(thread_busy_sem);
	thread_busy_sem = -1;
fail2:
	sceKernelDeleteSema(thread_job_sem);
	thread_job_sem = -1;
fail1:
	sceAudiocodecReleaseEDRAM(mp3_codec_struct);
fail:
	mp3_last_error = ret;
	initialized = 0;
	return 1;
}

void mp3_deinit(void)
{
	lprintf("mp3_deinit, initialized=%i\n", initialized);

	if (!initialized) return;
	thread_exit = 1;
	psp_sem_lock(thread_busy_sem);
	psp_sem_unlock(thread_busy_sem);

	sceKernelSignalSema(thread_job_sem, 1);
	sceKernelDelayThread(100*1000);

	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	mp3_handle = -1;
	mp3_fname = NULL;

	sceKernelDeleteSema(thread_busy_sem);
	thread_busy_sem = -1;
	sceKernelDeleteSema(thread_job_sem);
	thread_job_sem = -1;
	sceAudiocodecReleaseEDRAM(mp3_codec_struct);
	initialized = 0;
}

// may overflow stack?
static int decode_thread(SceSize args, void *argp)
{
	int ret, frame_size;

	lprintf("decode_thread started with id %08x, priority %i\n",
                sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());

	while (!thread_exit)
	{
		psp_sem_lock(thread_job_sem);
		if (thread_exit) break;

		psp_sem_lock(thread_busy_sem);
		//lprintf("{ job\n");

		frame_size = read_next_frame(working_buf);
		if (frame_size > 0)
		{
			mp3_codec_struct[6] = (unsigned long)mp3_src_buffer[working_buf];
			mp3_codec_struct[8] = (unsigned long)mp3_mix_buffer[working_buf];
			mp3_codec_struct[7] = mp3_codec_struct[10] = frame_size;
			mp3_codec_struct[9] = 1152 * 4;

			ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
			if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
		}

		//lprintf("} job\n");
		psp_sem_unlock(thread_busy_sem);
	}

	lprintf("leaving decode thread\n");
	sceKernelExitDeleteThread(0);
	return 0;
}


// might be called before initialization
int mp3_get_bitrate(void *f, int size)
{
	int ret, retval = -1, sample_rate, bitrate;
	// filenames are stored instead handles in PSP, due to stupid max open file limit
	char *fname = f;

	/* make sure thread is not busy.. */
	if (thread_busy_sem >= 0)
		psp_sem_lock(thread_busy_sem);

	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
	if (mp3_handle < 0) {
		lprintf("sceIoOpen(%s) failed\n", fname);
		goto end;
	}

	mp3_src_pos = 0;
	ret = read_next_frame(0);
	if (ret <= 0) {
		lprintf("read_next_frame() failed (%s)\n", fname);
		goto end;
	}
	sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
	bitrate = mp3_src_buffer[0][2] >> 4;

	if (sample_rate != 0) {
		lprintf("unsupported samplerate (%s)\n", fname);
		goto end; // only 44kHz supported..
	}
	bitrate = bitrates[bitrate];
	if (bitrate == 0) {
		lprintf("unsupported bitrate (%s)\n", fname);
		goto end;
	}

	/* looking good.. */
	retval = bitrate;
end:
	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	mp3_handle = -1;
	mp3_fname = NULL;
	if (thread_busy_sem >= 0)
		psp_sem_unlock(thread_busy_sem);
	if (retval < 0) mp3_last_error = -1; // remember we had a problem..
	return retval;
}


static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;

void mp3_start_play(void *f, int pos)
{
	char *fname = f;

	if (!initialized) return;

	lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
	psp_sem_lock(thread_busy_sem);

	if (mp3_fname != fname || mp3_handle < 0)
	{
		if (mp3_handle >= 0) sceIoClose(mp3_handle);
		mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
		if (mp3_handle < 0) {
			lprintf("sceIoOpen(%s) failed\n", fname);
			psp_sem_unlock(thread_busy_sem);
			return;
		}
		mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
		mp3_fname = fname;
	}

	// clear decoder state
	sceAudiocodecInit(mp3_codec_struct, 0x1002);

	// seek..
	mp3_src_pos = (int) (((float)pos / 1023.0f) * (float)mp3_src_size);
	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	lprintf("seek %i: %i/%i\n", pos, mp3_src_pos, mp3_src_size);

	mp3_job_started = 1;
	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
	working_buf = 0;

	/* send a request to decode first frame */
	psp_sem_unlock(thread_busy_sem);
	psp_sem_unlock(thread_job_sem);
	sceKernelDelayThread(1); // reschedule
}


void mp3_update(int *buffer, int length, int stereo)
{
	int length_mp3;

	// playback was started, track not ended
	if (mp3_handle < 0 || mp3_src_pos >= mp3_src_size) return;

	length_mp3 = length;
	if (PsndRate == 22050) length_mp3 <<= 1;	// mp3s are locked to 44100Hz stereo
	else if (PsndRate == 11025) length_mp3 <<= 2;	// so make length 44100ish

	/* do we have to wait? */
	if (mp3_job_started && mp3_samples_ready < length_mp3)
	{
		psp_sem_lock(thread_busy_sem);
		psp_sem_unlock(thread_busy_sem);
		mp3_job_started = 0;
		mp3_samples_ready += 1152;
	}

	/* mix mp3 data, only stereo */
	if (mp3_samples_ready >= length_mp3)
	{
		int shr = 0;
		void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
		if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
		else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }

		if (1152 - mp3_buffer_offs >= length_mp3) {
			mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);

			mp3_buffer_offs += length_mp3;
		} else {
			// collect samples from both buffers..
			int left = 1152 - mp3_buffer_offs;
			if (mp3_play_bufsel == 0)
			{
				mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length<<1);
				mp3_buffer_offs = length_mp3 - left;
				mp3_play_bufsel = 1;
			} else {
				mix_samples(buffer, mp3_mix_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
				mp3_buffer_offs = length_mp3 - left;
				mix_samples(buffer + ((left>>shr)<<1),
					mp3_mix_buffer[0], (mp3_buffer_offs>>shr)<<1);
				mp3_play_bufsel = 0;
			}
		}
		mp3_samples_ready -= length_mp3;
	}

	// ask to decode more if we already can
	if (!mp3_job_started)
	{
		mp3_job_started = 1;
		working_buf ^= 1;

		/* next job.. */
		psp_sem_lock(thread_busy_sem);   // just in case
		psp_sem_unlock(thread_busy_sem);
		psp_sem_unlock(thread_job_sem);
		sceKernelDelayThread(1);
	}
}


int mp3_get_offset(void) // 0-1023
{
	unsigned int offs1024 = 0;
	int cdda_on;

	cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
			(Pico_mcd->scd.Status_CDC & 1) && mp3_handle >= 0;

	if (cdda_on) {
		offs1024  = mp3_src_pos << 7;
		offs1024 /= mp3_src_size >> 3;
	}
	lprintf("offs1024=%u (%i/%i)\n", offs1024, mp3_src_pos, mp3_src_size);

	return offs1024;
}


void mp3_reopen_file(void)
{
	if (mp3_fname == NULL) return;
	lprintf("mp3_reopen_file(%s)\n", mp3_fname);

	// try closing, just in case
	if (mp3_handle >= 0) sceIoClose(mp3_handle);

	mp3_handle = sceIoOpen(mp3_fname, PSP_O_RDONLY, 0777);
	if (mp3_handle >= 0)
		sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	lprintf("mp3_reopen_file %s\n", mp3_handle >= 0 ? "ok" : "failed");
}
Commit	Line	Data
cff531af	1	/*
	2	* PicoDrive
	3	* (C) notaz, 2007,2008
	4	*
	5	* This work is licensed under the terms of MAME license.
	6	* See COPYING file in the top-level directory.
	7	*/
8b99ab90	8
1820b5a7	9	#include <stdio.h>
4b167c12	10	#include <string.h>
1820b5a7	11
4b167c12	12	#include <pspkernel.h>
	13	#include <pspsdk.h>
	14	#include <pspaudiocodec.h>
aefb65bc	15	#include <kubridge.h>
4b167c12	16
efcba75f	17	#include "../../pico/pico_int.h"
efcba75f	18	#include "../../pico/sound/mix.h"
4b167c12	19	#include "../common/lprintf.h"
	20
	21	int mp3_last_error = 0;
	22
110df09c	23	static int initialized = 0;
4b167c12	24	static SceUID thread_job_sem = -1;
	25	static SceUID thread_busy_sem = -1;
	26	static int thread_exit = 0;
	27
	28	// MPEG-1, layer 3
	29	static int bitrates[] = { 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0 };
	30	//static int samplerates[] = { 44100, 48000, 32000, 0 };
	31
	32	#define MIN_INFRAME_SIZE 96
	33	#define IN_BUFFER_SIZE (2*1024)
	34
	35	static unsigned long mp3_codec_struct[65] __attribute__((aligned(64)));
	36
	37	static unsigned char mp3_src_buffer[2][IN_BUFFER_SIZE] __attribute__((aligned(64)));
	38	static short mp3_mix_buffer[2][1152*2] __attribute__((aligned(64)));
	39	static int working_buf = 0;
	40
	41	static const char *mp3_fname = NULL;
	42	static SceUID mp3_handle = -1;
	43	static int mp3_src_pos = 0, mp3_src_size = 0;
	44
	45	static int decode_thread(SceSize args, void *argp);
	46
	47
	48	static void psp_sem_lock(SceUID sem)
1820b5a7	49	{
4b167c12	50	int ret = sceKernelWaitSema(sem, 1, 0);
	51	if (ret < 0) lprintf("sceKernelWaitSema(%08x) failed with %08x\n", sem, ret);
	52	}
	53
	54	static void psp_sem_unlock(SceUID sem)
	55	{
	56	int ret = sceKernelSignalSema(sem, 1);
	57	if (ret < 0) lprintf("sceKernelSignalSema(%08x) failed with %08x\n", sem, ret);
	58	}
	59
	60	// only accepts MPEG-1, layer3
	61	static int find_sync_word(unsigned char *data, int len)
	62	{
	63	int i;
	64	for (i = 0; i < len-1; i++)
	65	{
	66	if ( data[i+0] != 0xff) continue;
	67	if ((data[i+1] & 0xfe) == 0xfa) return i;
	68	i++;
	69	}
	70	return -1;
	71	}
	72
	73	static int read_next_frame(int which_buffer)
	74	{
	75	int i, bytes_read, frame_offset;
	76	int bitrate, padding, frame_size = 0;
	77
	78	for (i = 0; i < 32; i++)
	79	{
	80	bytes_read = sceIoRead(mp3_handle, mp3_src_buffer[which_buffer], sizeof(mp3_src_buffer[which_buffer]));
	81	mp3_src_pos += bytes_read;
	82	if (bytes_read < MIN_INFRAME_SIZE) {
	83	mp3_src_pos = mp3_src_size;
	84	return 0; // EOF/IO failure
	85	}
	86	frame_offset = find_sync_word(mp3_src_buffer[which_buffer], bytes_read);
	87	if (frame_offset < 0) {
	88	lprintf("missing syncword, foffs=%i\n", mp3_src_pos - bytes_read);
	89	mp3_src_pos--;
	90	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	91	continue;
	92	}
	93	if (bytes_read - frame_offset < 4) {
	94	lprintf("syncword @ EOB, foffs=%i\n", mp3_src_pos - bytes_read);
	95	mp3_src_pos--;
	96	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	97	continue;
	98	}
	99
	100	bitrate = mp3_src_buffer[which_buffer][frame_offset+2] >> 4;
	101	padding = (mp3_src_buffer[which_buffer][frame_offset+2] & 2) >> 1;
	102
	103	frame_size = 144000*bitrates[bitrate]/44100 + padding;
	104	if (frame_size <= 0) {
	105	lprintf("bad frame, foffs=%i\n", mp3_src_pos - bytes_read);
	106	continue; // bad frame
	107	}
	108
110df09c	109	if (bytes_read - frame_offset < frame_size)
110df09c	110	{
4b167c12	111	lprintf("unfit, foffs=%i\n", mp3_src_pos - bytes_read);
4b167c12	112	mp3_src_pos -= bytes_read - frame_offset;
110df09c	113	if (mp3_src_size - mp3_src_pos < frame_size) {
	114	mp3_src_pos = mp3_src_size;
	115	return 0; // EOF
	116	}
4b167c12	117	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	118	continue; // didn't fit, re-read..
	119	}
	120
	121	if (frame_offset) {
8022f53d	122	//lprintf("unaligned, foffs=%i, offs=%i\n", mp3_src_pos - bytes_read, frame_offset);
4b167c12	123	memmove(mp3_src_buffer[which_buffer], mp3_src_buffer[which_buffer] + frame_offset, frame_size);
	124	}
	125
	126	// align for next frame read
	127	mp3_src_pos -= bytes_read - (frame_offset + frame_size);
	128	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	129
	130	break;
	131	}
	132
	133	return frame_size > 0 ? frame_size : -1;
	134	}
	135
	136
	137	static SceUID load_start_module(const char *prxname)
	138	{
aefb65bc	139	SceUID mod, mod1;
	140	int status, ret;
	141
	142	mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
	143	if (mod < 0) {
	144	lprintf("failed to load %s (%08x), trying kuKernelLoadModule\n", prxname, mod);
	145	mod1 = kuKernelLoadModule(prxname, 0, NULL);
	146	if (mod1 < 0) lprintf("kuKernelLoadModule failed with %08x\n", mod1);
	147	else {
	148	ret = sceKernelStartModule(mod1, 0, NULL, &status, 0);
	149	if (ret < 0) lprintf("sceKernelStartModule failed with %08x\n", ret);
	150	else mod = mod1;
	151	}
	152	}
4b167c12	153	return mod;
	154	}
	155
	156
	157	int mp3_init(void)
	158	{
	159	SceUID thid, mod;
	160	int ret;
	161
	162	/* load modules */
	163	/* <= 1.5 (and probably some other, not sure which) fw need this to for audiocodec to work,
	164	* so if it fails, assume we are just on new enough firmware and continue.. */
	165	load_start_module("flash0:/kd/me_for_vsh.prx");
	166
	167	if (sceKernelDevkitVersion() < 0x02070010)
	168	mod = load_start_module("flash0:/kd/audiocodec.prx");
	169	else mod = load_start_module("flash0:/kd/avcodec.prx");
	170	if (mod < 0) {
2445b7cb	171	ret = mod;
2445b7cb	172	mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
4b167c12	173	if (mod < 0) goto fail;
	174	}
	175
	176	/* audiocodec init */
	177	memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
	178	ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
	179	if (ret < 0) {
	180	lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
	181	goto fail;
	182	}
	183
	184	ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
	185	if (ret < 0) {
	186	lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
	187	goto fail;
	188	}
	189
	190	ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
	191	if (ret < 0) {
	192	lprintf("sceAudiocodecInit failed with %08x\n", ret);
	193	goto fail1;
	194	}
	195
	196	/* thread and stuff */
	197	thread_job_sem = sceKernelCreateSema("p_mp3job_sem", 0, 0, 1, NULL);
	198	if (thread_job_sem < 0) {
	199	lprintf("sceKernelCreateSema() failed: %08x\n", thread_job_sem);
	200	ret = thread_job_sem;
	201	goto fail1;
	202	}
	203
	204	thread_busy_sem = sceKernelCreateSema("p_mp3busy_sem", 0, 1, 1, NULL);
	205	if (thread_busy_sem < 0) {
	206	lprintf("sceKernelCreateSema() failed: %08x\n", thread_busy_sem);
	207	ret = thread_busy_sem;
	208	goto fail2;
	209	}
	210
2445b7cb	211	/* use slightly higher prio then main */
4b167c12	212	thread_exit = 0;
2445b7cb	213	thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, NULL);
4b167c12	214	if (thid < 0) {
	215	lprintf("failed to create decode thread: %08x\n", thid);
	216	ret = thid;
	217	goto fail3;
	218	}
	219	ret = sceKernelStartThread(thid, 0, 0);
	220	if (ret < 0) {
	221	lprintf("failed to start decode thread: %08x\n", ret);
	222	goto fail3;
	223	}
	224
	225	mp3_last_error = 0;
110df09c	226	initialized = 1;
1820b5a7	227	return 0;
4b167c12	228
	229	fail3:
	230	sceKernelDeleteSema(thread_busy_sem);
	231	thread_busy_sem = -1;
	232	fail2:
	233	sceKernelDeleteSema(thread_job_sem);
	234	thread_job_sem = -1;
	235	fail1:
	236	sceAudiocodecReleaseEDRAM(mp3_codec_struct);
	237	fail:
	238	mp3_last_error = ret;
110df09c	239	initialized = 0;
4b167c12	240	return 1;
1820b5a7	241	}
1820b5a7	242
4b167c12	243	void mp3_deinit(void)
1820b5a7	244	{
110df09c	245	lprintf("mp3_deinit, initialized=%i\n", initialized);
	246
	247	if (!initialized) return;
4b167c12	248	thread_exit = 1;
	249	psp_sem_lock(thread_busy_sem);
	250	psp_sem_unlock(thread_busy_sem);
	251
	252	sceKernelSignalSema(thread_job_sem, 1);
	253	sceKernelDelayThread(100*1000);
	254
	255	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	256	mp3_handle = -1;
	257	mp3_fname = NULL;
	258
	259	sceKernelDeleteSema(thread_busy_sem);
	260	thread_busy_sem = -1;
	261	sceKernelDeleteSema(thread_job_sem);
	262	thread_job_sem = -1;
	263	sceAudiocodecReleaseEDRAM(mp3_codec_struct);
110df09c	264	initialized = 0;
1820b5a7	265	}
1820b5a7	266
4b167c12	267	// may overflow stack?
4b167c12	268	static int decode_thread(SceSize args, void *argp)
1820b5a7	269	{
4b167c12	270	int ret, frame_size;
	271
	272	lprintf("decode_thread started with id %08x, priority %i\n",
	273	sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());
	274
	275	while (!thread_exit)
	276	{
	277	psp_sem_lock(thread_job_sem);
	278	if (thread_exit) break;
	279
	280	psp_sem_lock(thread_busy_sem);
	281	//lprintf("{ job\n");
	282
	283	frame_size = read_next_frame(working_buf);
	284	if (frame_size > 0)
	285	{
	286	mp3_codec_struct[6] = (unsigned long)mp3_src_buffer[working_buf];
	287	mp3_codec_struct[8] = (unsigned long)mp3_mix_buffer[working_buf];
	288	mp3_codec_struct[7] = mp3_codec_struct[10] = frame_size;
	289	mp3_codec_struct[9] = 1152 * 4;
	290
	291	ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
	292	if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
	293	}
	294
	295	//lprintf("} job\n");
	296	psp_sem_unlock(thread_busy_sem);
	297	}
	298
	299	lprintf("leaving decode thread\n");
	300	sceKernelExitDeleteThread(0);
1820b5a7	301	return 0;
	302	}
	303
4b167c12	304
110df09c	305	// might be called before initialization
7c18e34a	306	int mp3_get_bitrate(void *f, int size)
4b167c12	307	{
b542be46	308	int ret, retval = -1, sample_rate, bitrate;
4b167c12	309	// filenames are stored instead handles in PSP, due to stupid max open file limit
7c18e34a	310	char *fname = f;
4b167c12	311
4b167c12	312	/* make sure thread is not busy.. */
110df09c	313	if (thread_busy_sem >= 0)
110df09c	314	psp_sem_lock(thread_busy_sem);
4b167c12	315
	316	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	317	mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
	318	if (mp3_handle < 0) {
	319	lprintf("sceIoOpen(%s) failed\n", fname);
	320	goto end;
	321	}
	322
	323	mp3_src_pos = 0;
	324	ret = read_next_frame(0);
	325	if (ret <= 0) {
110df09c	326	lprintf("read_next_frame() failed (%s)\n", fname);
4b167c12	327	goto end;
	328	}
	329	sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
	330	bitrate = mp3_src_buffer[0][2] >> 4;
	331
	332	if (sample_rate != 0) {
110df09c	333	lprintf("unsupported samplerate (%s)\n", fname);
4b167c12	334	goto end; // only 44kHz supported..
	335	}
	336	bitrate = bitrates[bitrate];
	337	if (bitrate == 0) {
110df09c	338	lprintf("unsupported bitrate (%s)\n", fname);
4b167c12	339	goto end;
	340	}
	341
	342	/* looking good.. */
b542be46	343	retval = bitrate;
4b167c12	344	end:
	345	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	346	mp3_handle = -1;
	347	mp3_fname = NULL;
110df09c	348	if (thread_busy_sem >= 0)
110df09c	349	psp_sem_unlock(thread_busy_sem);
b542be46	350	if (retval < 0) mp3_last_error = -1; // remember we had a problem..
b542be46	351	return retval;
4b167c12	352	}
	353
	354
	355	static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;
	356
7c18e34a	357	void mp3_start_play(void *f, int pos)
4b167c12	358	{
7c18e34a	359	char *fname = f;
4b167c12	360
110df09c	361	if (!initialized) return;
110df09c	362
4b167c12	363	lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
	364	psp_sem_lock(thread_busy_sem);
	365
8022f53d	366	if (mp3_fname != fname \|\| mp3_handle < 0)
4b167c12	367	{
	368	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	369	mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
	370	if (mp3_handle < 0) {
	371	lprintf("sceIoOpen(%s) failed\n", fname);
	372	psp_sem_unlock(thread_busy_sem);
	373	return;
	374	}
	375	mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
	376	mp3_fname = fname;
	377	}
	378
2b02d6e5	379	// clear decoder state
	380	sceAudiocodecInit(mp3_codec_struct, 0x1002);
	381
4b167c12	382	// seek..
	383	mp3_src_pos = (int) (((float)pos / 1023.0f) * (float)mp3_src_size);
	384	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	385	lprintf("seek %i: %i/%i\n", pos, mp3_src_pos, mp3_src_size);
	386
	387	mp3_job_started = 1;
	388	mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
	389	working_buf = 0;
	390
	391	/* send a request to decode first frame */
	392	psp_sem_unlock(thread_busy_sem);
	393	psp_sem_unlock(thread_job_sem);
	394	sceKernelDelayThread(1); // reschedule
	395	}
	396
	397
1820b5a7	398	void mp3_update(int *buffer, int length, int stereo)
1820b5a7	399	{
4b167c12	400	int length_mp3;
	401
	402	// playback was started, track not ended
	403	if (mp3_handle < 0 \|\| mp3_src_pos >= mp3_src_size) return;
	404
	405	length_mp3 = length;
	406	if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo
	407	else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish
	408
	409	/* do we have to wait? */
	410	if (mp3_job_started && mp3_samples_ready < length_mp3)
	411	{
	412	psp_sem_lock(thread_busy_sem);
	413	psp_sem_unlock(thread_busy_sem);
	414	mp3_job_started = 0;
	415	mp3_samples_ready += 1152;
	416	}
	417
	418	/* mix mp3 data, only stereo */
	419	if (mp3_samples_ready >= length_mp3)
	420	{
	421	int shr = 0;
	422	void (mix_samples)(int dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
	423	if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
	424	else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }
	425
	426	if (1152 - mp3_buffer_offs >= length_mp3) {
	427	mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
	428
	429	mp3_buffer_offs += length_mp3;
	430	} else {
	431	// collect samples from both buffers..
	432	int left = 1152 - mp3_buffer_offs;
	433	if (mp3_play_bufsel == 0)
	434	{
	435	mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length<<1);
	436	mp3_buffer_offs = length_mp3 - left;
	437	mp3_play_bufsel = 1;
	438	} else {
	439	mix_samples(buffer, mp3_mix_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
	440	mp3_buffer_offs = length_mp3 - left;
	441	mix_samples(buffer + ((left>>shr)<<1),
	442	mp3_mix_buffer[0], (mp3_buffer_offs>>shr)<<1);
	443	mp3_play_bufsel = 0;
	444	}
	445	}
	446	mp3_samples_ready -= length_mp3;
	447	}
	448
	449	// ask to decode more if we already can
	450	if (!mp3_job_started)
	451	{
	452	mp3_job_started = 1;
	453	working_buf ^= 1;
	454
	455	/* next job.. */
	456	psp_sem_lock(thread_busy_sem); // just in case
	457	psp_sem_unlock(thread_busy_sem);
	458	psp_sem_unlock(thread_job_sem);
	459	sceKernelDelayThread(1);
	460	}
	461	}
	462
	463
464	int mp3_get_offset(void) // 0-1023
465	{
466	unsigned int offs1024 = 0;
467	int cdda_on;
468
602133e1	469	cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
4b167c12	470	(Pico_mcd->scd.Status_CDC & 1) && mp3_handle >= 0;
	471
	472	if (cdda_on) {
	473	offs1024 = mp3_src_pos << 7;
	474	offs1024 /= mp3_src_size >> 3;
	475	}
	476	lprintf("offs1024=%u (%i/%i)\n", offs1024, mp3_src_pos, mp3_src_size);
	477
	478	return offs1024;
1820b5a7	479	}
1820b5a7	480
4b167c12	481
ea08c296	482	void mp3_reopen_file(void)
	483	{
	484	if (mp3_fname == NULL) return;
	485	lprintf("mp3_reopen_file(%s)\n", mp3_fname);
	486
	487	// try closing, just in case
	488	if (mp3_handle >= 0) sceIoClose(mp3_handle);
	489
	490	mp3_handle = sceIoOpen(mp3_fname, PSP_O_RDONLY, 0777);
	491	if (mp3_handle >= 0)
	492	sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
	493	lprintf("mp3_reopen_file %s\n", mp3_handle >= 0 ? "ok" : "failed");
	494	}
	495