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https://github.com/RaySollium99/libpicofe.git
synced 2025-09-05 14:57:46 -04:00
unify helix mp3 code, some sound adjustments
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@726 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
8af2da7273
commit
9615b3dfde
4 changed files with 67 additions and 151 deletions
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@ -1,6 +1,6 @@
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#ifdef __GP2X__
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void mp3_update_local(int *buffer, int length, int stereo);
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void mp3_start_local(void);
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void mp3_start_play_local(FILE *f, int pos);
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#endif
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@ -6,14 +6,22 @@
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#include <stdio.h>
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#include <string.h>
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#include "../../pico/pico_int.h"
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#include "../../pico/sound/mix.h"
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#include <pico/pico_int.h>
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#include <pico/sound/mix.h>
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#include "helix/pub/mp3dec.h"
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#include "mp3.h"
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#include "lprintf.h"
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static HMP3Decoder mp3dec = 0;
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static FILE *mp3_current_file = NULL;
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static int mp3_file_len = 0, mp3_file_pos = 0;
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static int mp3_buffer_offs = 0;
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static unsigned char mp3_input_buffer[2*1024];
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#ifdef __GP2X__
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#define mp3_update mp3_update_local
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#define mp3_start_play mp3_start_play_local
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#endif
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static int find_sync_word(unsigned char *buf, int nBytes)
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{
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@ -41,7 +49,6 @@ static int find_sync_word(unsigned char *buf, int nBytes)
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return -1;
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}
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static int try_get_header(unsigned char *buff, MP3FrameInfo *fi)
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{
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int ret, offs1, offs = 0;
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@ -94,111 +101,54 @@ int mp3_get_bitrate(FILE *f, int len)
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return fi.bitrate / 1000;
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}
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#ifdef __GP2X__
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#include "../gp2x/code940/940shared.h"
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extern _940_ctl_t *shared_ctl;
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extern unsigned char *mp3_mem;
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static int mp3_decode(void)
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{
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// tried copying this to cached mem, no improvement noticed
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int mp3_offs = shared_ctl->mp3_offs;
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unsigned char *readPtr = mp3_mem + mp3_offs;
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int bytesLeft = shared_ctl->mp3_len - mp3_offs;
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int offset; // frame offset from readPtr
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int retries = 0, err;
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if (bytesLeft <= 0) return 1; // EOF, nothing to do
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retry:
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offset = find_sync_word(readPtr, bytesLeft);
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if (offset < 0) {
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shared_ctl->mp3_offs = shared_ctl->mp3_len;
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return 1; // EOF
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}
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readPtr += offset;
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bytesLeft -= offset;
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err = MP3Decode(mp3dec, &readPtr, &bytesLeft, cdda_out_buffer, 0);
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if (err) {
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if (err == ERR_MP3_INDATA_UNDERFLOW) {
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shared_ctl->mp3_offs = shared_ctl->mp3_len; // EOF
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return 1;
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} else if (err <= -6 && err >= -12) {
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// ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*
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// just try to skip the offending frame..
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readPtr++;
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bytesLeft--;
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if (retries++ < 2) goto retry;
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else lprintf("mp3 decode failed with %i after %i retries\n", err, retries);
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}
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shared_ctl->mp3_errors++;
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shared_ctl->mp3_lasterr = err;
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}
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shared_ctl->mp3_offs = readPtr - mp3_mem;
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return 0;
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}
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void mp3_start_local(void)
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{
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// must re-init decoder for new track
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if (mp3dec) MP3FreeDecoder(mp3dec);
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mp3dec = MP3InitDecoder();
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mp3_buffer_offs = 0;
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mp3_decode();
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}
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#define mp3_update mp3_update_local
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#else // !__GP2X__
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static FILE *mp3_current_file = NULL;
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static int mp3_file_len = 0, mp3_file_pos = 0;
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static unsigned char mp3_input_buffer[2*1024];
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static int mp3_decode(void)
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{
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unsigned char *readPtr;
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int bytesLeft;
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int offset; // mp3 frame offset from readPtr
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int err;
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int had_err;
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int err = 0;
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do
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{
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if (mp3_file_pos >= mp3_file_len) return 1; // EOF, nothing to do
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if (mp3_file_pos >= mp3_file_len)
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return 1; /* EOF, nothing to do */
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fseek(mp3_current_file, mp3_file_pos, SEEK_SET);
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bytesLeft = fread(mp3_input_buffer, 1, sizeof(mp3_input_buffer), mp3_current_file);
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offset = find_sync_word(mp3_input_buffer, bytesLeft);
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if (offset < 0) {
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//lprintf("find_sync_word (%i/%i) err %i\n", mp3_file_pos, mp3_file_len, offset);
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lprintf("find_sync_word (%i/%i) err %i\n", mp3_file_pos, mp3_file_len, offset);
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mp3_file_pos = mp3_file_len;
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return 1; // EOF
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}
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readPtr = mp3_input_buffer + offset;
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bytesLeft -= offset;
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had_err = err;
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err = MP3Decode(mp3dec, &readPtr, &bytesLeft, cdda_out_buffer, 0);
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if (err) {
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//lprintf("MP3Decode err (%i/%i) %i\n", mp3_file_pos, mp3_file_len, err);
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if (err == ERR_MP3_INDATA_UNDERFLOW) {
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if (err == ERR_MP3_MAINDATA_UNDERFLOW && !had_err) {
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// just need another frame
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mp3_file_pos += readPtr - mp3_input_buffer;
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continue;
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}
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if (err == ERR_MP3_INDATA_UNDERFLOW && !had_err) {
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if (offset == 0)
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// something's really wrong here, frame had to fit
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mp3_file_pos = mp3_file_len;
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else
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mp3_file_pos += offset;
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continue;
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} else if (err <= -6 && err >= -12) {
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}
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if (-12 <= err && err <= -6) {
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// ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*
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// just try to skip the offending frame..
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mp3_file_pos += offset + 1;
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continue;
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}
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lprintf("MP3Decode err (%i/%i) %i\n", mp3_file_pos, mp3_file_len, err);
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mp3_file_pos = mp3_file_len;
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return 1;
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}
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@ -215,14 +165,13 @@ void mp3_start_play(FILE *f, int pos)
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mp3_current_file = NULL;
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mp3_buffer_offs = 0;
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// must re-init decoder for new track
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if (mp3dec) MP3FreeDecoder(mp3dec);
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mp3dec = MP3InitDecoder();
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if (!(PicoOpt&POPT_EN_MCD_CDDA) || f == NULL) // cdda disabled or no file?
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if (!(PicoOpt & POPT_EN_MCD_CDDA) || f == NULL) // cdda disabled or no file?
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return;
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//lprintf("mp3_start_play %p %i\n", f, pos);
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// must re-init decoder for new track
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if (mp3dec)
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MP3FreeDecoder(mp3dec);
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mp3dec = MP3InitDecoder();
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mp3_current_file = f;
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fseek(f, 0, SEEK_END);
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@ -230,41 +179,21 @@ void mp3_start_play(FILE *f, int pos)
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// seek..
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if (pos) {
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mp3_file_pos = (mp3_file_len << 6) >> 10;
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mp3_file_pos *= pos;
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mp3_file_pos >>= 6;
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unsigned long long pos64 = mp3_file_len;
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pos64 *= pos;
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mp3_file_pos = pos64 >> 10;
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}
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mp3_decode();
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}
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int mp3_get_offset(void)
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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 = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_CDDA) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
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(Pico_mcd->scd.Status_CDC & 1) && mp3_current_file != NULL;
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if (cdda_on) {
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offs1024 = mp3_file_pos << 7;
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offs1024 /= mp3_file_len >> 3;
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}
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//lprintf("mp3_get_offset offs1024=%u (%i/%i)\n", offs1024, mp3_file_pos, mp3_file_len);
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return offs1024;
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}
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#endif // ifndef __GP2X__
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void mp3_update(int *buffer, int length, int stereo)
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{
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int length_mp3, 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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#ifndef __GP2X__
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if (mp3_current_file == NULL || mp3_file_pos >= mp3_file_len) return; // no file / EOF
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#endif
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if (mp3_current_file == NULL || mp3_file_pos >= mp3_file_len)
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return; /* no file / EOF */
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length_mp3 = length;
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if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; length_mp3 <<= 1; shr = 1; }
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@ -287,4 +216,3 @@ void mp3_update(int *buffer, int length, int stereo)
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}
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}
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