psp/mp3.c

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