mirror of
https://github.com/RaySollium99/libpicofe.git
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psp mp3 implementation
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@293 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz
parent
16e89bed91
commit
a6df06b763
9 changed files with 502 additions and 27 deletions
432
psp/mp3.c
432
psp/mp3.c
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@ -1,20 +1,442 @@
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#include <stdio.h>
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#include <string.h>
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#include <pspkernel.h>
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#include <pspsdk.h>
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#include <pspaudiocodec.h>
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#include "../../Pico/PicoInt.h"
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#include "../../Pico/sound/mix.h"
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#include "../common/lprintf.h"
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int mp3_last_error = 0;
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static SceUID thread_job_sem = -1;
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static SceUID thread_busy_sem = -1;
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static int thread_exit = 0;
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// MPEG-1, layer 3
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static int bitrates[] = { 0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0 };
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//static int samplerates[] = { 44100, 48000, 32000, 0 };
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#define MIN_INFRAME_SIZE 96
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#define IN_BUFFER_SIZE (2*1024)
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static unsigned long mp3_codec_struct[65] __attribute__((aligned(64)));
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static unsigned char mp3_src_buffer[2][IN_BUFFER_SIZE] __attribute__((aligned(64)));
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static short mp3_mix_buffer[2][1152*2] __attribute__((aligned(64)));
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static int working_buf = 0;
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static const char *mp3_fname = NULL;
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static SceUID mp3_handle = -1;
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static int mp3_src_pos = 0, mp3_src_size = 0;
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static int decode_thread(SceSize args, void *argp);
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static void psp_sem_lock(SceUID sem)
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{
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int ret = sceKernelWaitSema(sem, 1, 0);
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if (ret < 0) lprintf("sceKernelWaitSema(%08x) failed with %08x\n", sem, ret);
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}
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static void psp_sem_unlock(SceUID sem)
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{
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int ret = sceKernelSignalSema(sem, 1);
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if (ret < 0) lprintf("sceKernelSignalSema(%08x) failed with %08x\n", sem, ret);
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}
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// only accepts MPEG-1, layer3
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static int find_sync_word(unsigned char *data, int len)
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{
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int i;
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for (i = 0; i < len-1; i++)
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{
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if ( data[i+0] != 0xff) continue;
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if ((data[i+1] & 0xfe) == 0xfa) return i;
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i++;
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}
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return -1;
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}
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static int read_next_frame(int which_buffer)
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{
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int i, bytes_read, frame_offset;
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int bitrate, padding, frame_size = 0;
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for (i = 0; i < 32; i++)
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{
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bytes_read = sceIoRead(mp3_handle, mp3_src_buffer[which_buffer], sizeof(mp3_src_buffer[which_buffer]));
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mp3_src_pos += bytes_read;
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if (bytes_read < MIN_INFRAME_SIZE) {
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mp3_src_pos = mp3_src_size;
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return 0; // EOF/IO failure
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}
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frame_offset = find_sync_word(mp3_src_buffer[which_buffer], bytes_read);
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if (frame_offset < 0) {
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lprintf("missing syncword, foffs=%i\n", mp3_src_pos - bytes_read);
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mp3_src_pos--;
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sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
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continue;
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}
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if (bytes_read - frame_offset < 4) {
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lprintf("syncword @ EOB, foffs=%i\n", mp3_src_pos - bytes_read);
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mp3_src_pos--;
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sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
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continue;
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}
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bitrate = mp3_src_buffer[which_buffer][frame_offset+2] >> 4;
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padding = (mp3_src_buffer[which_buffer][frame_offset+2] & 2) >> 1;
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frame_size = 144000*bitrates[bitrate]/44100 + padding;
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if (frame_size <= 0) {
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lprintf("bad frame, foffs=%i\n", mp3_src_pos - bytes_read);
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continue; // bad frame
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}
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if (bytes_read - frame_offset < frame_size) {
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lprintf("unfit, foffs=%i\n", mp3_src_pos - bytes_read);
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mp3_src_pos -= bytes_read - frame_offset;
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sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
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continue; // didn't fit, re-read..
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}
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if (frame_offset) {
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lprintf("unaligned, foffs=%i, offs=%i\n", mp3_src_pos - bytes_read, frame_offset);
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memmove(mp3_src_buffer[which_buffer], mp3_src_buffer[which_buffer] + frame_offset, frame_size);
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}
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// align for next frame read
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mp3_src_pos -= bytes_read - (frame_offset + frame_size);
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sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
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break;
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}
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return frame_size > 0 ? frame_size : -1;
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}
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static SceUID load_start_module(const char *prxname)
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{
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SceUID mod = pspSdkLoadStartModule(prxname, PSP_MEMORY_PARTITION_KERNEL);
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if (mod < 0)
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lprintf("failed to load %s: %08x\n", prxname, mod);
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return mod;
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}
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int mp3_init(void)
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{
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SceUID thid, mod;
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int ret;
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/* load modules */
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/* <= 1.5 (and probably some other, not sure which) fw need this to for audiocodec to work,
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* so if it fails, assume we are just on new enough firmware and continue.. */
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load_start_module("flash0:/kd/me_for_vsh.prx");
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if (sceKernelDevkitVersion() < 0x02070010)
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mod = load_start_module("flash0:/kd/audiocodec.prx");
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else mod = load_start_module("flash0:/kd/avcodec.prx");
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if (mod < 0) {
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ret = mod = load_start_module("flash0:/kd/audiocodec_260.prx"); // last chance..
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if (mod < 0) goto fail;
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}
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/* audiocodec init */
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memset(mp3_codec_struct, 0, sizeof(mp3_codec_struct));
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ret = sceAudiocodecCheckNeedMem(mp3_codec_struct, 0x1002);
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if (ret < 0) {
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lprintf("sceAudiocodecCheckNeedMem failed with %08x\n", ret);
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goto fail;
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}
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ret = sceAudiocodecGetEDRAM(mp3_codec_struct, 0x1002);
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if (ret < 0) {
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lprintf("sceAudiocodecGetEDRAM failed with %08x\n", ret);
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goto fail;
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}
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ret = sceAudiocodecInit(mp3_codec_struct, 0x1002);
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if (ret < 0) {
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lprintf("sceAudiocodecInit failed with %08x\n", ret);
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goto fail1;
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}
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/* thread and stuff */
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thread_job_sem = sceKernelCreateSema("p_mp3job_sem", 0, 0, 1, NULL);
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if (thread_job_sem < 0) {
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lprintf("sceKernelCreateSema() failed: %08x\n", thread_job_sem);
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ret = thread_job_sem;
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goto fail1;
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}
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thread_busy_sem = sceKernelCreateSema("p_mp3busy_sem", 0, 1, 1, NULL);
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if (thread_busy_sem < 0) {
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lprintf("sceKernelCreateSema() failed: %08x\n", thread_busy_sem);
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ret = thread_busy_sem;
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goto fail2;
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}
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lprintf("thread_busy_sem: %08x, thread_job_sem: %08x\n", thread_busy_sem, thread_job_sem);
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thread_exit = 0;
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thid = sceKernelCreateThread("mp3decode_thread", decode_thread, 30, 0x2000, 0, 0); /* use slightly higher prio then main */
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if (thid < 0) {
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lprintf("failed to create decode thread: %08x\n", thid);
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ret = thid;
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goto fail3;
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}
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ret = sceKernelStartThread(thid, 0, 0);
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if (ret < 0) {
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lprintf("failed to start decode thread: %08x\n", ret);
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goto fail3;
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}
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mp3_last_error = 0;
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return 0;
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fail3:
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sceKernelDeleteSema(thread_busy_sem);
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thread_busy_sem = -1;
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fail2:
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sceKernelDeleteSema(thread_job_sem);
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thread_job_sem = -1;
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fail1:
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sceAudiocodecReleaseEDRAM(mp3_codec_struct);
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fail:
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mp3_last_error = ret;
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return 1;
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}
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void mp3_deinit(void)
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{
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lprintf("deinit\n");
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thread_exit = 1;
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psp_sem_lock(thread_busy_sem);
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psp_sem_unlock(thread_busy_sem);
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sceKernelSignalSema(thread_job_sem, 1);
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sceKernelDelayThread(100*1000);
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if (mp3_handle >= 0) sceIoClose(mp3_handle);
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mp3_handle = -1;
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mp3_fname = NULL;
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sceKernelDeleteSema(thread_busy_sem);
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thread_busy_sem = -1;
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sceKernelDeleteSema(thread_job_sem);
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thread_job_sem = -1;
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sceAudiocodecReleaseEDRAM(mp3_codec_struct);
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}
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// may overflow stack?
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static int decode_thread(SceSize args, void *argp)
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{
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int ret, frame_size;
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lprintf("decode_thread started with id %08x, priority %i\n",
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sceKernelGetThreadId(), sceKernelGetThreadCurrentPriority());
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while (!thread_exit)
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{
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psp_sem_lock(thread_job_sem);
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if (thread_exit) break;
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psp_sem_lock(thread_busy_sem);
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//lprintf("{ job\n");
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frame_size = read_next_frame(working_buf);
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if (frame_size > 0)
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{
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mp3_codec_struct[6] = (unsigned long)mp3_src_buffer[working_buf];
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mp3_codec_struct[8] = (unsigned long)mp3_mix_buffer[working_buf];
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mp3_codec_struct[7] = mp3_codec_struct[10] = frame_size;
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mp3_codec_struct[9] = 1152 * 4;
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ret = sceAudiocodecDecode(mp3_codec_struct, 0x1002);
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if (ret < 0) lprintf("sceAudiocodecDecode failed with %08x\n", ret);
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}
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//lprintf("} job\n");
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psp_sem_unlock(thread_busy_sem);
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}
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lprintf("leaving decode thread\n");
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sceKernelExitDeleteThread(0);
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return 0;
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}
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int mp3_get_bitrate(FILE *f, int size)
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{
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return 0;
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int ret = -1, sample_rate, bitrate;
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// filenames are stored instead handles in PSP, due to stupid max open file limit
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char *fname = (char *)f;
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/* make sure thread is not busy.. */
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psp_sem_lock(thread_busy_sem);
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if (mp3_handle >= 0) sceIoClose(mp3_handle);
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mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
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if (mp3_handle < 0) {
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lprintf("sceIoOpen(%s) failed\n", fname);
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goto end;
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}
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mp3_src_pos = 0;
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ret = read_next_frame(0);
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if (ret <= 0) {
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lprintf("read_next_frame() failed\n");
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goto end;
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}
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sample_rate = (mp3_src_buffer[0][2] & 0x0c) >> 2;
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bitrate = mp3_src_buffer[0][2] >> 4;
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if (sample_rate != 0) {
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lprintf("unsupported samplerate\n");
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goto end; // only 44kHz supported..
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}
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bitrate = bitrates[bitrate];
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if (bitrate == 0) {
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lprintf("unsupported bitrate\n");
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goto end;
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}
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/* looking good.. */
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ret = bitrate;
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end:
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if (mp3_handle >= 0) sceIoClose(mp3_handle);
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mp3_handle = -1;
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mp3_fname = NULL;
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psp_sem_unlock(thread_busy_sem);
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if (ret < 0) mp3_last_error = -1; // remember we had a problem..
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return ret;
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}
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static int mp3_job_started = 0, mp3_samples_ready = 0, mp3_buffer_offs = 0, mp3_play_bufsel = 0;
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void mp3_start_play(FILE *f, int pos)
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{
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char *fname = (char *)f;
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lprintf("mp3_start_play(%s) @ %i\n", fname, pos);
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psp_sem_lock(thread_busy_sem);
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if (mp3_fname != fname)
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{
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if (mp3_handle >= 0) sceIoClose(mp3_handle);
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mp3_handle = sceIoOpen(fname, PSP_O_RDONLY, 0777);
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if (mp3_handle < 0) {
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lprintf("sceIoOpen(%s) failed\n", fname);
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psp_sem_unlock(thread_busy_sem);
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return;
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}
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mp3_src_size = sceIoLseek32(mp3_handle, 0, PSP_SEEK_END);
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mp3_fname = fname;
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}
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// seek..
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mp3_src_pos = (int) (((float)pos / 1023.0f) * (float)mp3_src_size);
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sceIoLseek32(mp3_handle, mp3_src_pos, PSP_SEEK_SET);
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lprintf("seek %i: %i/%i\n", pos, mp3_src_pos, mp3_src_size);
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mp3_job_started = 1;
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mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
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working_buf = 0;
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/* send a request to decode first frame */
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psp_sem_unlock(thread_busy_sem);
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psp_sem_unlock(thread_job_sem);
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sceKernelDelayThread(1); // reschedule
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}
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int mp3_get_offset(void) // 0-1023
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{
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return 0;
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}
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void mp3_update(int *buffer, int length, int stereo)
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{
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int length_mp3;
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// playback was started, track not ended
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if (mp3_handle < 0 || mp3_src_pos >= mp3_src_size) return;
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length_mp3 = length;
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if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo
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else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish
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/* do we have to wait? */
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if (mp3_job_started && mp3_samples_ready < length_mp3)
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{
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psp_sem_lock(thread_busy_sem);
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psp_sem_unlock(thread_busy_sem);
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mp3_job_started = 0;
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mp3_samples_ready += 1152;
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}
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/* mix mp3 data, only stereo */
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if (mp3_samples_ready >= length_mp3)
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{
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int shr = 0;
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void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
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if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
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else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }
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if (1152 - mp3_buffer_offs >= length_mp3) {
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mix_samples(buffer, mp3_mix_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
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mp3_buffer_offs += length_mp3;
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} else {
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// collect samples from both buffers..
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int left = 1152 - mp3_buffer_offs;
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if (mp3_play_bufsel == 0)
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{
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mix_samples(buffer, mp3_mix_buffer[0] + mp3_buffer_offs*2, length<<1);
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mp3_buffer_offs = length_mp3 - left;
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mp3_play_bufsel = 1;
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} else {
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mix_samples(buffer, mp3_mix_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
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mp3_buffer_offs = length_mp3 - left;
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mix_samples(buffer + ((left>>shr)<<1),
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mp3_mix_buffer[0], (mp3_buffer_offs>>shr)<<1);
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mp3_play_bufsel = 0;
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}
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}
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mp3_samples_ready -= length_mp3;
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}
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// ask to decode more if we already can
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if (!mp3_job_started)
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{
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mp3_job_started = 1;
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working_buf ^= 1;
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/* next job.. */
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psp_sem_lock(thread_busy_sem); // just in case
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psp_sem_unlock(thread_busy_sem);
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psp_sem_unlock(thread_job_sem);
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sceKernelDelayThread(1);
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}
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}
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int mp3_get_offset(void) // 0-1023
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{
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unsigned int offs1024 = 0;
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int cdda_on;
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cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
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(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;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue