+// (c) Copyright 2007 notaz, All rights reserved.
+// Free for non-commercial use.
+
+// For commercial use, separate licencing terms must be obtained.
+
#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;
-int mp3_get_bitrate(FILE *f, int size)
+ 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_start_play(FILE *f, int pos)
+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;
}
-int mp3_get_offset(void) // 0-1023
+// 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");
}
notaz.gp2x.de / libpicofe.git / blobdiff