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
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
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/* Ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */
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#include <codecs/lib/codeclib.h>
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#include "libgme/gbs_emu.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*2)
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static int16_t samples[CHUNK_SIZE] IBSS_ATTR;
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static struct Gbs_Emu gbs_emu;
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/****************** rockbox interface ******************/
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static void set_codec_track(int t) {
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Gbs_start_track(&gbs_emu, t);
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/* for loop mode we disable track limits */
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if (!ci->loop_track()) {
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Track_set_fade(&gbs_emu, Track_get_length( &gbs_emu, t ), 4000);
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}
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ci->set_elapsed(t*1000); /* t is track no to display */
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}
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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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Gbs_init(&gbs_emu);
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Gbs_set_sample_rate(&gbs_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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int track = 0;
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DEBUGF("GBS: 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("GBS: 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 || n < (size_t)ci->filesize) {
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DEBUGF("GBS: file load failed\n");
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return CODEC_ERROR;
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}
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if ((err = Gbs_load_mem(&gbs_emu, buf, ci->filesize))) {
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DEBUGF("GBS: Gbs_load_mem failed (%s)\n", err);
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return CODEC_ERROR;
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}
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/* Update internal track count */
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if (gbs_emu.m3u.size > 0)
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gbs_emu.track_count = gbs_emu.m3u.size;
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if (ci->id3->elapsed) {
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track = ci->id3->elapsed/1000;
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if (track >= gbs_emu.track_count) return CODEC_OK;
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}
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next_track:
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set_codec_track(track);
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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 = param/1000;
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ci->seek_complete();
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if (track >= gbs_emu.track_count) break;
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goto next_track;
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}
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/* Generate audio buffer */
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err = Gbs_play(&gbs_emu, CHUNK_SIZE, samples);
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if (err || Track_ended(&gbs_emu)) {
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track++;
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if (track >= gbs_emu.track_count) break;
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goto next_track;
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}
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ci->pcmbuf_insert(samples, NULL, CHUNK_SIZE >> 1);
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}
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return CODEC_OK;
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}
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