platform/psp/mp3.c

   1 /*
   2  * PicoDrive MP3 driver for PSP
   3  *
   4  * (C) notaz, 2007,2008
   5  *
   6  * This work is licensed under the terms of MAME license.
   7  * See COPYING file in the top-level directory.
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12
  13 #include <pspkernel.h>
  14 #include <pspsdk.h>
  15 #include <pspaudiocodec.h>
  16
  17 #include <pico/pico_int.h>
  18 #include <pico/sound/mix.h>
  19 #include "../libpicofe/lprintf.h"
  20
  21 int mp3_last_error = 0;
  22
  23 static int initialized = 0;
  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)
  49 {
  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
 109                 if (bytes_read - frame_offset < frame_size)
 110                 {
 111                         lprintf("unfit, foffs=%i\n", mp3_src_pos - bytes_read);
 112                         mp3_src_pos -= bytes_read - frame_offset;
 113                         if (mp3_src_size - mp3_src_pos < frame_size) {
 114                                 mp3_src_pos = mp3_src_size;
 115                                 return 0; // EOF
 116                         }
 117                         sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
 118                         continue; // didn't fit, re-read..
 119                 }
 120
 121                 if (frame_offset) {
 122                         //lprintf("unaligned, foffs=%i, offs=%i\n", mp3_src_pos - bytes_read, frame_offset);
 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 {
 139         SceUID mod;
 140
 141         mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
 142         if (mod < 0) {
 143                 lprintf("failed to load %s (%08x), trying kuKernelLoadModule\n", prxname, mod);
 144         }
 145         return mod;
 146 }
 147
 148
 149 int mp3_init(void)
 150 {
 151         SceUID thid, mod;
 152         int ret;
 153
 154         /* load modules */
 155         /* <= 1.5 (and probably some other, not sure which) fw need this to for audiocodec to work,
 156          * so if it fails, assume we are just on new enough firmware and continue.. */
 157         load_start_module("flash0:/kd/me_for_vsh.prx");
 158
 159         if (sceKernelDevkitVersion() < 0x02070010)
 160              mod = load_start_module("flash0:/kd/audiocodec.prx");
 161         else mod = load_start_module("flash0:/kd/avcodec.prx");
 162         if (mod < 0) {
 163                 ret = mod;
 164                 mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
 165                 if (mod < 0) goto fail;
 166         }
 167
 168         /* audiocodec init */
 169         memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
 170         ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
 171         if (ret < 0) {
 172                 lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
 173                 goto fail;
 174         }
 175
 176         ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
 177         if (ret < 0) {
 178                 lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
 179                 goto fail;
 180         }
 181
 182         ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
 183         if (ret < 0) {
 184                 lprintf("sceAudiocodecInit failed with %08x\n", ret);
 185                 goto fail1;
 186         }
 187
 188         /* thread and stuff */
 189         thread_job_sem = sceKernelCreateSema("p_mp3job_sem", 0, 0, 1, NULL);
 190         if (thread_job_sem < 0) {
 191                 lprintf("sceKernelCreateSema() failed: %08x\n", thread_job_sem);
 192                 ret = thread_job_sem;
 193                 goto fail1;
 194         }
 195
 196         thread_busy_sem = sceKernelCreateSema("p_mp3busy_sem", 0, 1, 1, NULL);
 197         if (thread_busy_sem < 0) {
 198                 lprintf("sceKernelCreateSema() failed: %08x\n", thread_busy_sem);
 199                 ret = thread_busy_sem;
 200                 goto fail2;
 201         }
 202
 203         /* use slightly higher prio then main */
 204         thread_exit = 0;
 205         thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, NULL);
 206         if (thid < 0) {
 207                 lprintf("failed to create decode thread: %08x\n", thid);
 208                 ret = thid;
 209                 goto fail3;
 210         }
 211         ret = sceKernelStartThread(thid, 0, 0);
 212         if (ret < 0) {
 213                 lprintf("failed to start decode thread: %08x\n", ret);
 214                 goto fail3;
 215         }
 216
 217         mp3_last_error = 0;
 218         initialized = 1;
 219         return 0;
 220
 221 fail3:
 222         sceKernelDeleteSema(thread_busy_sem);
 223         thread_busy_sem = -1;
 224 fail2:
 225         sceKernelDeleteSema(thread_job_sem);
 226         thread_job_sem = -1;
 227 fail1:
 228         sceAudiocodecReleaseEDRAM(mp3_codec_struct);
 229 fail:
 230         mp3_last_error = ret;
 231         initialized = 0;
 232         return 1;
 233 }
 234
 235 void mp3_deinit(void)
 236 {
 237         lprintf("mp3_deinit, initialized=%i\n", initialized);
 238
 239         if (!initialized) return;
 240         thread_exit = 1;
 241         psp_sem_lock(thread_busy_sem);
 242         psp_sem_unlock(thread_busy_sem);
 243
 244         sceKernelSignalSema(thread_job_sem, 1);
 245         sceKernelDelayThread(100*1000);
 246
 247         if (mp3_handle >= 0) sceIoClose(mp3_handle);
 248         mp3_handle = -1;
 249         mp3_fname = NULL;
 250
 251         sceKernelDeleteSema(thread_busy_sem);
 252         thread_busy_sem = -1;
 253         sceKernelDeleteSema(thread_job_sem);
 254         thread_job_sem = -1;
 255         sceAudiocodecReleaseEDRAM(mp3_codec_struct);
 256         initialized = 0;
 257 }
 258
 259 // may overflow stack?
 260 static int decode_thread(SceSize args, void *argp)
 261 {
 262         int ret, frame_size;
 263
 264         lprintf("decode_thread started with id %08x, priority %i\n",
 265                 sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());
 266
 267         while (!thread_exit)
 268         {
 269                 psp_sem_lock(thread_job_sem);
 270                 if (thread_exit) break;
 271
 272                 psp_sem_lock(thread_busy_sem);
 273                 //lprintf("{ job\n");
 274
 275                 frame_size = read_next_frame(working_buf);
 276                 if (frame_size > 0)
 277                 {
 278                         mp3_codec_struct[6] = (unsigned long)mp3_src_buffer[working_buf];
 279                         mp3_codec_struct[8] = (unsigned long)mp3_mix_buffer[working_buf];
 280                         mp3_codec_struct[7] = mp3_codec_struct[10] = frame_size;
 281                         mp3_codec_struct[9] = 1152 * 4;
 282
 283                         ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
 284                         if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
 285                 }
 286
 287                 //lprintf("} job\n");
 288                 psp_sem_unlock(thread_busy_sem);
 289         }
 290
 291         lprintf("leaving decode thread\n");
 292         sceKernelExitDeleteThread(0);
 293         return 0;
 294 }
 295
 296
 297 // might be called before initialization
 298 int mp3_get_bitrate(void *f, int size)
 299 {
 300         int ret, retval = -1, sample_rate, bitrate;
 301         // filenames are stored instead handles in PSP, due to stupid max open file limit
 302         char *fname = f;
 303
 304         /* make sure thread is not busy.. */
 305         if (thread_busy_sem >= 0)
 306                 psp_sem_lock(thread_busy_sem);
 307
 308         if (mp3_handle >= 0) sceIoClose(mp3_handle);
 309         mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
 310         if (mp3_handle < 0) {
 311                 lprintf("sceIoOpen(%s) failed\n", fname);
 312                 goto end;
 313         }
 314
 315         mp3_src_pos = 0;
 316         ret = read_next_frame(0);
 317         if (ret <= 0) {
 318                 lprintf("read_next_frame() failed (%s)\n", fname);
 319                 goto end;
 320         }
 321         sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
 322         bitrate = mp3_src_buffer[0][2] >> 4;
 323
 324         if (sample_rate != 0) {
 325                 lprintf("unsupported samplerate (%s)\n", fname);
 326                 goto end; // only 44kHz supported..
 327         }
 328         bitrate = bitrates[bitrate];
 329         if (bitrate == 0) {
 330                 lprintf("unsupported bitrate (%s)\n", fname);
 331                 goto end;
 332         }
 333
 334         /* looking good.. */
 335         retval = bitrate;
 336 end:
 337         if (mp3_handle >= 0) sceIoClose(mp3_handle);
 338         mp3_handle = -1;
 339         mp3_fname = NULL;
 340         if (thread_busy_sem >= 0)
 341                 psp_sem_unlock(thread_busy_sem);
 342         if (retval < 0) mp3_last_error = -1; // remember we had a problem..
 343         return retval;
 344 }
 345
 346
 347 static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;
 348
 349 void mp3_start_play(void *f, int pos)
 350 {
 351         char *fname = f;
 352
 353         if (!initialized) return;
 354
 355         lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
 356         psp_sem_lock(thread_busy_sem);
 357
 358         if (mp3_fname != fname || mp3_handle < 0)
 359         {
 360                 if (mp3_handle >= 0) sceIoClose(mp3_handle);
 361                 mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
 362                 if (mp3_handle < 0) {
 363                         lprintf("sceIoOpen(%s) failed\n", fname);
 364                         psp_sem_unlock(thread_busy_sem);
 365                         return;
 366                 }
 367                 mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
 368                 mp3_fname = fname;
 369         }
 370
 371         // clear decoder state
 372         sceAudiocodecInit(mp3_codec_struct, 0x1002);
 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(s32 *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 * Pico.snd.cdda_mult >> 16;
 398
 399         /* do we have to wait? */
 400         if (mp3_job_started && mp3_samples_ready < length_mp3)
 401         {
 402                 psp_sem_lock(thread_busy_sem);
 403                 psp_sem_unlock(thread_busy_sem);
 404                 mp3_job_started = 0;
 405                 mp3_samples_ready += 1152;
 406         }
 407
 408         /* mix mp3 data, only stereo */
 409         if (mp3_samples_ready >= length_mp3)
 410         {
 411                 void (*mix_samples)(s32 *dest_buf, s16 *mp3_buf, int count, int fac16) = mix_16h_to_32_resample_stereo;
 412                 if (!stereo)
 413                         mix_samples = mix_16h_to_32_resample_mono;
 414
 415                 if (1152 - mp3_buffer_offs >= length_mp3) {
 416                         mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length, Pico.snd.cdda_mult);
 417
 418                         mp3_buffer_offs += length_mp3;
 419                 } else {
 420                         // collect samples from both buffers..
 421                         int left = (1152 - mp3_buffer_offs) * Pico.snd.cdda_div >> 16;
 422                         int sm = stereo ? 2 : 1;
 423
 424                         if (mp3_play_bufsel == 0)
 425                         {
 426                                 mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length, Pico.snd.cdda_mult);
 427                                 mp3_play_bufsel = 1;
 428                         } else {
 429                                 mix_samples(buffer, mp3_mix_buffer[1] + mp3_buffer_offs*2, left, Pico.snd.cdda_mult);
 430                                 mix_samples(buffer + left * sm,
 431                                         mp3_mix_buffer[0], (length-left), Pico.snd.cdda_mult);
 432                                 mp3_play_bufsel = 0;
 433                         }
 434                         mp3_buffer_offs = (length-left) * Pico.snd.cdda_mult >> 16;
 435                 }
 436                 mp3_samples_ready -= length_mp3;
 437         }
 438
 439         // ask to decode more if we already can
 440         if (!mp3_job_started)
 441         {
 442                 mp3_job_started = 1;
 443                 working_buf ^= 1;
 444
 445                 /* next job.. */
 446                 psp_sem_lock(thread_busy_sem);   // just in case
 447                 psp_sem_unlock(thread_busy_sem);
 448                 psp_sem_unlock(thread_job_sem);
 449                 sceKernelDelayThread(1);
 450         }
 451 }
 452
 453
 454 void mp3_reopen_file(void)
 455 {
 456         if (mp3_fname == NULL) return;
 457         lprintf("mp3_reopen_file(%s)\n", mp3_fname);
 458
 459         // try closing, just in case
 460         if (mp3_handle >= 0) sceIoClose(mp3_handle);
 461
 462         mp3_handle = sceIoOpen(mp3_fname, PSP_O_RDONLY, 0777);
 463         if (mp3_handle >= 0)
 464                 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
 465         lprintf("mp3_reopen_file %s\n", mp3_handle >= 0 ? "ok" : "failed");
 466 }
 467