5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
12 #include <pspkernel.h>
14 #include <pspaudiocodec.h>
17 #include "../../pico/pico_int.h"
18 #include "../../pico/sound/mix.h"
19 #include "../common/lprintf.h"
21 int mp3_last_error = 0;
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;
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 };
32 #define MIN_INFRAME_SIZE 96
33 #define IN_BUFFER_SIZE (2*1024)
35 static unsigned long mp3_codec_struct[65] __attribute__((aligned(64)));
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;
41 static const char *mp3_fname = NULL;
42 static SceUID mp3_handle = -1;
43 static int mp3_src_pos = 0, mp3_src_size = 0;
45 static int decode_thread(SceSize args, void *argp);
48 static void psp_sem_lock(SceUID sem)
50 int ret = sceKernelWaitSema(sem, 1, 0);
51 if (ret < 0) lprintf("sceKernelWaitSema(%08x) failed with %08x\n", sem, ret);
54 static void psp_sem_unlock(SceUID sem)
56 int ret = sceKernelSignalSema(sem, 1);
57 if (ret < 0) lprintf("sceKernelSignalSema(%08x) failed with %08x\n", sem, ret);
60 // only accepts MPEG-1, layer3
61 static int find_sync_word(unsigned char *data, int len)
64 for (i = 0; i < len-1; i++)
66 if ( data[i+0] != 0xff) continue;
67 if ((data[i+1] & 0xfe) == 0xfa) return i;
73 static int read_next_frame(int which_buffer)
75 int i, bytes_read, frame_offset;
76 int bitrate, padding, frame_size = 0;
78 for (i = 0; i < 32; i++)
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
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);
90 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
93 if (bytes_read - frame_offset < 4) {
94 lprintf("syncword @ EOB, foffs=%i\n", mp3_src_pos - bytes_read);
96 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
100 bitrate = mp3_src_buffer[which_buffer][frame_offset+2] >> 4;
101 padding = (mp3_src_buffer[which_buffer][frame_offset+2] & 2) >> 1;
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
109 if (bytes_read - frame_offset < frame_size)
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;
117 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
118 continue; // didn't fit, re-read..
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);
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);
133 return frame_size > 0 ? frame_size : -1;
137 static SceUID load_start_module(const char *prxname)
142 mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
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);
148 ret = sceKernelStartModule(mod1, 0, NULL, &status, 0);
149 if (ret < 0) lprintf("sceKernelStartModule failed with %08x\n", ret);
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");
167 if (sceKernelDevkitVersion() < 0x02070010)
168 mod = load_start_module("flash0:/kd/audiocodec.prx");
169 else mod = load_start_module("flash0:/kd/avcodec.prx");
172 mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
173 if (mod < 0) goto fail;
176 /* audiocodec init */
177 memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
178 ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
180 lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
184 ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
186 lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
190 ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
192 lprintf("sceAudiocodecInit failed with %08x\n", ret);
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;
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;
211 /* use slightly higher prio then main */
213 thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, NULL);
215 lprintf("failed to create decode thread: %08x\n", thid);
219 ret = sceKernelStartThread(thid, 0, 0);
221 lprintf("failed to start decode thread: %08x\n", ret);
230 sceKernelDeleteSema(thread_busy_sem);
231 thread_busy_sem = -1;
233 sceKernelDeleteSema(thread_job_sem);
236 sceAudiocodecReleaseEDRAM(mp3_codec_struct);
238 mp3_last_error = ret;
243 void mp3_deinit(void)
245 lprintf("mp3_deinit, initialized=%i\n", initialized);
247 if (!initialized) return;
249 psp_sem_lock(thread_busy_sem);
250 psp_sem_unlock(thread_busy_sem);
252 sceKernelSignalSema(thread_job_sem, 1);
253 sceKernelDelayThread(100*1000);
255 if (mp3_handle >= 0) sceIoClose(mp3_handle);
259 sceKernelDeleteSema(thread_busy_sem);
260 thread_busy_sem = -1;
261 sceKernelDeleteSema(thread_job_sem);
263 sceAudiocodecReleaseEDRAM(mp3_codec_struct);
267 // may overflow stack?
268 static int decode_thread(SceSize args, void *argp)
272 lprintf("decode_thread started with id %08x, priority %i\n",
273 sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());
277 psp_sem_lock(thread_job_sem);
278 if (thread_exit) break;
280 psp_sem_lock(thread_busy_sem);
281 //lprintf("{ job\n");
283 frame_size = read_next_frame(working_buf);
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;
291 ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
292 if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
295 //lprintf("} job\n");
296 psp_sem_unlock(thread_busy_sem);
299 lprintf("leaving decode thread\n");
300 sceKernelExitDeleteThread(0);
305 // might be called before initialization
306 int mp3_get_bitrate(void *f, int size)
308 int ret, retval = -1, sample_rate, bitrate;
309 // filenames are stored instead handles in PSP, due to stupid max open file limit
312 /* make sure thread is not busy.. */
313 if (thread_busy_sem >= 0)
314 psp_sem_lock(thread_busy_sem);
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);
324 ret = read_next_frame(0);
326 lprintf("read_next_frame() failed (%s)\n", fname);
329 sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
330 bitrate = mp3_src_buffer[0][2] >> 4;
332 if (sample_rate != 0) {
333 lprintf("unsupported samplerate (%s)\n", fname);
334 goto end; // only 44kHz supported..
336 bitrate = bitrates[bitrate];
338 lprintf("unsupported bitrate (%s)\n", fname);
345 if (mp3_handle >= 0) sceIoClose(mp3_handle);
348 if (thread_busy_sem >= 0)
349 psp_sem_unlock(thread_busy_sem);
350 if (retval < 0) mp3_last_error = -1; // remember we had a problem..
355 static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;
357 void mp3_start_play(void *f, int pos)
361 if (!initialized) return;
363 lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
364 psp_sem_lock(thread_busy_sem);
366 if (mp3_fname != fname || mp3_handle < 0)
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);
375 mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
379 // clear decoder state
380 sceAudiocodecInit(mp3_codec_struct, 0x1002);
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);
388 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
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
398 void mp3_update(int *buffer, int length, int stereo)
402 // playback was started, track not ended
403 if (mp3_handle < 0 || mp3_src_pos >= mp3_src_size) return;
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
409 /* do we have to wait? */
410 if (mp3_job_started && mp3_samples_ready < length_mp3)
412 psp_sem_lock(thread_busy_sem);
413 psp_sem_unlock(thread_busy_sem);
415 mp3_samples_ready += 1152;
418 /* mix mp3 data, only stereo */
419 if (mp3_samples_ready >= length_mp3)
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; }
426 if (1152 - mp3_buffer_offs >= length_mp3) {
427 mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
429 mp3_buffer_offs += length_mp3;
431 // collect samples from both buffers..
432 int left = 1152 - mp3_buffer_offs;
433 if (mp3_play_bufsel == 0)
435 mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length<<1);
436 mp3_buffer_offs = length_mp3 - left;
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);
446 mp3_samples_ready -= length_mp3;
449 // ask to decode more if we already can
450 if (!mp3_job_started)
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);
464 int mp3_get_offset(void) // 0-1023
466 unsigned int offs1024 = 0;
469 cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
470 (Pico_mcd->scd.Status_CDC & 1) && mp3_handle >= 0;
473 offs1024 = mp3_src_pos << 7;
474 offs1024 /= mp3_src_size >> 3;
476 lprintf("offs1024=%u (%i/%i)\n", offs1024, mp3_src_pos, mp3_src_size);
482 void mp3_reopen_file(void)
484 if (mp3_fname == NULL) return;
485 lprintf("mp3_reopen_file(%s)\n", mp3_fname);
487 // try closing, just in case
488 if (mp3_handle >= 0) sceIoClose(mp3_handle);
490 mp3_handle = sceIoOpen(mp3_fname, PSP_O_RDONLY, 0777);
492 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
493 lprintf("mp3_reopen_file %s\n", mp3_handle >= 0 ? "ok" : "failed");