6c868dd48f
Just use long so the compiler potentially doesn't complain about use of other values not in the enum. It's also the type used around the system for event ids. Increase min codec API version. No functional changes. Change-Id: If4419b42912f5e4ef673adcdeb69313e503f94cc
161 lines
4.3 KiB
C
161 lines
4.3 KiB
C
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/* Ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */
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/* Inflate code taken from WikiViewer plugin by Adam Gashlin */
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#include <codecs/lib/codeclib.h>
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#include "libgme/blargg_endian.h"
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#include "libgme/vgm_emu.h"
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#include "libgme/inflate/mallocer.h"
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#include "libgme/inflate/inflate.h"
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CODEC_HEADER
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/* Maximum number of bytes to process in one iteration */
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#define CHUNK_SIZE (1024*4)
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#define MAINMEMBUF 0
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static int16_t samples[CHUNK_SIZE] IBSS_ATTR;
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static struct Vgm_Emu vgm_emu;
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static void *inflatebuf; /* heap for gunzip */
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static char *songbuf; /* destination for uncompressed song */
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static uint32_t songbuflen=0; /* size of the song buffer */
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static uint32_t songlen=0; /* used size of the song buffer */
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static void codec_vgz_update_length(void)
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{
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ci->id3->length = Track_get_length( &vgm_emu );
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ci->id3->tail_trim = 4 * 1000;
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if (vgm_emu.info.loop_length <= 0)
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ci->id3->tail_trim = 0;
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ci->id3->length += ci->id3->tail_trim;
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}
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static void codec_update_fade(void)
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{
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/* for REPEAT_ONE we disable track limits */
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Track_set_fade(&vgm_emu,
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ci->loop_track() ? indefinite_count :
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ci->id3->length - ci->id3->tail_trim,
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ci->id3->tail_trim);
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}
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static void codec_update_elapsed(void)
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{
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ci->set_elapsed(ci->loop_track() ? 0 : Track_tell(&vgm_emu));
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}
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/****************** rockbox interface ******************/
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/* this is the codec entry point */
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enum codec_status codec_main(enum codec_entry_call_reason reason)
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{
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if (reason == CODEC_LOAD) {
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/* we only render 16 bits */
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ci->configure(DSP_SET_SAMPLE_DEPTH, 16);
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/* 44 Khz, Interleaved stereo */
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ci->configure(DSP_SET_FREQUENCY, 44100);
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ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
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Vgm_init(&vgm_emu);
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Vgm_set_sample_rate(&vgm_emu, 44100);
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}
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return CODEC_OK;
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}
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/* this is called for each file to process */
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enum codec_status codec_run(void)
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{
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blargg_err_t err;
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uint8_t *buf;
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size_t n;
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intptr_t param;
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DEBUGF("VGM: next_track\n");
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if (codec_init()) {
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return CODEC_ERROR;
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}
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codec_set_replaygain(ci->id3);
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/* Read the entire file */
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DEBUGF("VGM: request file\n");
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ci->seek_buffer(0);
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buf = ci->request_buffer(&n, ci->filesize);
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if (!buf) {
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DEBUGF("VGM: file load failed\n");
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return CODEC_ERROR;
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}
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/* If couldn't get the whole buffer
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will trim file and put and 'end_command'
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at the end*/
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if (n < (size_t)ci->filesize) {
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DEBUGF("VGM: file was trimmed\n");
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}
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/* If is gzipped decompress it */
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if ( get_le16( buf ) == 0x8b1f ) {
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wpw_init_mempool(MAINMEMBUF);
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inflatebuf=wpw_malloc(MAINMEMBUF,0x13500);
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/* Will use available remaining memory
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as output buffer */
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songbuflen=wpw_available(MAINMEMBUF);
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songbuf=wpw_malloc(MAINMEMBUF,songbuflen);
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songlen=decompress(buf,n,songbuf,songbuflen,0,inflatebuf);
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if ((err = Vgm_load_mem(&vgm_emu, songbuf, songlen, true))) {
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DEBUGF("VGM: Vgm_load_mem failed (%s)\n", err);
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return CODEC_ERROR;
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}
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/* Since metadata parser doesn't support VGZ
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will set song length here */
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codec_vgz_update_length();
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}
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else if ((err = Vgm_load_mem(&vgm_emu, buf, n, false))) {
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DEBUGF("VGM: Vgm_load failed_mem (%s)\n", err);
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return CODEC_ERROR;
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}
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Vgm_start_track(&vgm_emu);
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if (ci->id3->elapsed != 0)
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Track_seek(&vgm_emu, ci->id3->elapsed);
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codec_update_elapsed();
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codec_update_fade();
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/* The main decoder loop */
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while (1) {
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long action = ci->get_command(¶m);
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if (action == CODEC_ACTION_HALT)
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break;
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if (action == CODEC_ACTION_SEEK_TIME) {
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Track_seek(&vgm_emu, param);
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codec_update_elapsed();
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ci->seek_complete();
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/* Set fade again in case we seek to start of song */
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codec_update_fade();
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}
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/* Generate audio buffer */
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err = Vgm_play(&vgm_emu, CHUNK_SIZE, samples);
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if (err || Track_ended(&vgm_emu)) break;
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ci->pcmbuf_insert(samples, NULL, CHUNK_SIZE / 2);
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codec_update_elapsed();
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}
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return CODEC_OK;
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}
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