6 #include <pspaudiocodec.h>
8 #include "../../Pico/PicoInt.h"
9 #include "../../Pico/sound/mix.h"
10 #include "../common/lprintf.h"
12 int mp3_last_error = 0;
14 static SceUID thread_job_sem = -1;
15 static SceUID thread_busy_sem = -1;
16 static int thread_exit = 0;
19 static int bitrates[] = { 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0 };
20 //static int samplerates[] = { 44100, 48000, 32000, 0 };
22 #define MIN_INFRAME_SIZE 96
23 #define IN_BUFFER_SIZE (2*1024)
25 static unsigned long mp3_codec_struct[65] __attribute__((aligned(64)));
27 static unsigned char mp3_src_buffer[2][IN_BUFFER_SIZE] __attribute__((aligned(64)));
28 static short mp3_mix_buffer[2][1152*2] __attribute__((aligned(64)));
29 static int working_buf = 0;
31 static const char *mp3_fname = NULL;
32 static SceUID mp3_handle = -1;
33 static int mp3_src_pos = 0, mp3_src_size = 0;
35 static int decode_thread(SceSize args, void *argp);
38 static void psp_sem_lock(SceUID sem)
40 int ret = sceKernelWaitSema(sem, 1, 0);
41 if (ret < 0) lprintf("sceKernelWaitSema(%08x) failed with %08x\n", sem, ret);
44 static void psp_sem_unlock(SceUID sem)
46 int ret = sceKernelSignalSema(sem, 1);
47 if (ret < 0) lprintf("sceKernelSignalSema(%08x) failed with %08x\n", sem, ret);
50 // only accepts MPEG-1, layer3
51 static int find_sync_word(unsigned char *data, int len)
54 for (i = 0; i < len-1; i++)
56 if ( data[i+0] != 0xff) continue;
57 if ((data[i+1] & 0xfe) == 0xfa) return i;
63 static int read_next_frame(int which_buffer)
65 int i, bytes_read, frame_offset;
66 int bitrate, padding, frame_size = 0;
68 for (i = 0; i < 32; i++)
70 bytes_read = sceIoRead(mp3_handle, mp3_src_buffer[which_buffer], sizeof(mp3_src_buffer[which_buffer]));
71 mp3_src_pos += bytes_read;
72 if (bytes_read < MIN_INFRAME_SIZE) {
73 mp3_src_pos = mp3_src_size;
74 return 0; // EOF/IO failure
76 frame_offset = find_sync_word(mp3_src_buffer[which_buffer], bytes_read);
77 if (frame_offset < 0) {
78 lprintf("missing syncword, foffs=%i\n", mp3_src_pos - bytes_read);
80 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
83 if (bytes_read - frame_offset < 4) {
84 lprintf("syncword @ EOB, foffs=%i\n", mp3_src_pos - bytes_read);
86 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
90 bitrate = mp3_src_buffer[which_buffer][frame_offset+2] >> 4;
91 padding = (mp3_src_buffer[which_buffer][frame_offset+2] & 2) >> 1;
93 frame_size = 144000*bitrates[bitrate]/44100 + padding;
94 if (frame_size <= 0) {
95 lprintf("bad frame, foffs=%i\n", mp3_src_pos - bytes_read);
96 continue; // bad frame
99 if (bytes_read - frame_offset < frame_size) {
100 lprintf("unfit, foffs=%i\n", mp3_src_pos - bytes_read);
101 mp3_src_pos -= bytes_read - frame_offset;
102 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
103 continue; // didn't fit, re-read..
107 //lprintf("unaligned, foffs=%i, offs=%i\n", mp3_src_pos - bytes_read, frame_offset);
108 memmove(mp3_src_buffer[which_buffer], mp3_src_buffer[which_buffer] + frame_offset, frame_size);
111 // align for next frame read
112 mp3_src_pos -= bytes_read - (frame_offset + frame_size);
113 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
118 return frame_size > 0 ? frame_size : -1;
122 static SceUID load_start_module(const char *prxname)
124 SceUID mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
126 lprintf("failed to load %s: %08x\n", prxname, mod);
137 /* <= 1.5 (and probably some other, not sure which) fw need this to for audiocodec to work,
138 * so if it fails, assume we are just on new enough firmware and continue.. */
139 load_start_module("flash0:/kd/me_for_vsh.prx");
141 if (sceKernelDevkitVersion() < 0x02070010)
142 mod = load_start_module("flash0:/kd/audiocodec.prx");
143 else mod = load_start_module("flash0:/kd/avcodec.prx");
145 ret = mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
146 if (mod < 0) goto fail;
149 /* audiocodec init */
150 memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
151 ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
153 lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
157 ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
159 lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
163 ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
165 lprintf("sceAudiocodecInit failed with %08x\n", ret);
169 /* thread and stuff */
170 thread_job_sem = sceKernelCreateSema("p_mp3job_sem", 0, 0, 1, NULL);
171 if (thread_job_sem < 0) {
172 lprintf("sceKernelCreateSema() failed: %08x\n", thread_job_sem);
173 ret = thread_job_sem;
177 thread_busy_sem = sceKernelCreateSema("p_mp3busy_sem", 0, 1, 1, NULL);
178 if (thread_busy_sem < 0) {
179 lprintf("sceKernelCreateSema() failed: %08x\n", thread_busy_sem);
180 ret = thread_busy_sem;
185 thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, 0); /* use slightly higher prio then main */
187 lprintf("failed to create decode thread: %08x\n", thid);
191 ret = sceKernelStartThread(thid, 0, 0);
193 lprintf("failed to start decode thread: %08x\n", ret);
201 sceKernelDeleteSema(thread_busy_sem);
202 thread_busy_sem = -1;
204 sceKernelDeleteSema(thread_job_sem);
207 sceAudiocodecReleaseEDRAM(mp3_codec_struct);
209 mp3_last_error = ret;
213 void mp3_deinit(void)
217 psp_sem_lock(thread_busy_sem);
218 psp_sem_unlock(thread_busy_sem);
220 sceKernelSignalSema(thread_job_sem, 1);
221 sceKernelDelayThread(100*1000);
223 if (mp3_handle >= 0) sceIoClose(mp3_handle);
227 sceKernelDeleteSema(thread_busy_sem);
228 thread_busy_sem = -1;
229 sceKernelDeleteSema(thread_job_sem);
231 sceAudiocodecReleaseEDRAM(mp3_codec_struct);
234 // may overflow stack?
235 static int decode_thread(SceSize args, void *argp)
239 lprintf("decode_thread started with id %08x, priority %i\n",
240 sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());
244 psp_sem_lock(thread_job_sem);
245 if (thread_exit) break;
247 psp_sem_lock(thread_busy_sem);
248 //lprintf("{ job\n");
250 frame_size = read_next_frame(working_buf);
253 mp3_codec_struct[6] = (unsigned long)mp3_src_buffer[working_buf];
254 mp3_codec_struct[8] = (unsigned long)mp3_mix_buffer[working_buf];
255 mp3_codec_struct[7] = mp3_codec_struct[10] = frame_size;
256 mp3_codec_struct[9] = 1152 * 4;
258 ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
259 if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
262 //lprintf("} job\n");
263 psp_sem_unlock(thread_busy_sem);
266 lprintf("leaving decode thread\n");
267 sceKernelExitDeleteThread(0);
272 int mp3_get_bitrate(FILE *f, int size)
274 int ret, retval = -1, sample_rate, bitrate;
275 // filenames are stored instead handles in PSP, due to stupid max open file limit
276 char *fname = (char *)f;
278 /* make sure thread is not busy.. */
279 psp_sem_lock(thread_busy_sem);
281 if (mp3_handle >= 0) sceIoClose(mp3_handle);
282 mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
283 if (mp3_handle < 0) {
284 lprintf("sceIoOpen(%s) failed\n", fname);
289 ret = read_next_frame(0);
291 lprintf("read_next_frame() failed\n");
294 sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
295 bitrate = mp3_src_buffer[0][2] >> 4;
297 if (sample_rate != 0) {
298 lprintf("unsupported samplerate\n");
299 goto end; // only 44kHz supported..
301 bitrate = bitrates[bitrate];
303 lprintf("unsupported bitrate\n");
310 if (mp3_handle >= 0) sceIoClose(mp3_handle);
313 psp_sem_unlock(thread_busy_sem);
314 if (retval < 0) mp3_last_error = -1; // remember we had a problem..
319 static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;
321 void mp3_start_play(FILE *f, int pos)
323 char *fname = (char *)f;
325 lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
326 psp_sem_lock(thread_busy_sem);
328 if (mp3_fname != fname || mp3_handle < 0)
330 if (mp3_handle >= 0) sceIoClose(mp3_handle);
331 mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
332 if (mp3_handle < 0) {
333 lprintf("sceIoOpen(%s) failed\n", fname);
334 psp_sem_unlock(thread_busy_sem);
337 mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
342 mp3_src_pos = (int) (((float)pos / 1023.0f) * (float)mp3_src_size);
343 sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
344 lprintf("seek %i: %i/%i\n", pos, mp3_src_pos, mp3_src_size);
347 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
350 /* send a request to decode first frame */
351 psp_sem_unlock(thread_busy_sem);
352 psp_sem_unlock(thread_job_sem);
353 sceKernelDelayThread(1); // reschedule
357 void mp3_update(int *buffer, int length, int stereo)
361 // playback was started, track not ended
362 if (mp3_handle < 0 || mp3_src_pos >= mp3_src_size) return;
365 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo
366 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish
368 /* do we have to wait? */
369 if (mp3_job_started && mp3_samples_ready < length_mp3)
371 psp_sem_lock(thread_busy_sem);
372 psp_sem_unlock(thread_busy_sem);
374 mp3_samples_ready += 1152;
377 /* mix mp3 data, only stereo */
378 if (mp3_samples_ready >= length_mp3)
381 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
382 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
383 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }
385 if (1152 - mp3_buffer_offs >= length_mp3) {
386 mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
388 mp3_buffer_offs += length_mp3;
390 // collect samples from both buffers..
391 int left = 1152 - mp3_buffer_offs;
392 if (mp3_play_bufsel == 0)
394 mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length<<1);
395 mp3_buffer_offs = length_mp3 - left;
398 mix_samples(buffer, mp3_mix_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
399 mp3_buffer_offs = length_mp3 - left;
400 mix_samples(buffer + ((left>>shr)<<1),
401 mp3_mix_buffer[0], (mp3_buffer_offs>>shr)<<1);
405 mp3_samples_ready -= length_mp3;
408 // ask to decode more if we already can
409 if (!mp3_job_started)
415 psp_sem_lock(thread_busy_sem); // just in case
416 psp_sem_unlock(thread_busy_sem);
417 psp_sem_unlock(thread_job_sem);
418 sceKernelDelayThread(1);
423 int mp3_get_offset(void) // 0-1023
425 unsigned int offs1024 = 0;
428 cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
429 (Pico_mcd->scd.Status_CDC & 1) && mp3_handle >= 0;
432 offs1024 = mp3_src_pos << 7;
433 offs1024 /= mp3_src_size >> 3;
435 lprintf("offs1024=%u (%i/%i)\n", offs1024, mp3_src_pos, mp3_src_size);