31b7122867
This complements offset-based resume and playback start funcionality. The implementation is global on both HWCODEC and SWCODEC. Basically, if either the specified elapsed or offset are non-zero, it indicates a mid-track resume. To resume by time only, set elapsed to nonzero and offset to zero. To resume by offset only, set offset to nonzero and elapsed to zero. Which one the codec uses and which has priority is up to the codec; however, using an elapsed time covers more cases: * Codecs not able to use an offset such as VGM or other atomic formats * Starting playback at a nonzero elapsed time from a source that contains no offset, such as a cuesheet The change re-versions pretty much everything from tagcache to nvram. Change-Id: Ic7aebb24e99a03ae99585c5e236eba960d163f38 Reviewed-on: http://gerrit.rockbox.org/516 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested: Michael Sevakis <jethead71@rockbox.org>
128 lines
3.2 KiB
C
128 lines
3.2 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/sgc_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 Sgc_Emu sgc_emu;
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/* Coleco Bios */
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/* Colecovision not supported yet
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static char coleco_bios[0x2000];
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*/
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/****************** rockbox interface ******************/
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static void set_codec_track(int t) {
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Sgc_start_track(&sgc_emu, t);
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/* for REPEAT_ONE we disable track limits */
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if (!ci->loop_track()) {
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Track_set_fade(&sgc_emu, Track_get_length( &sgc_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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Sgc_init(&sgc_emu);
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Sgc_set_sample_rate(&sgc_emu, 44100);
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/* set coleco bios, should be named coleco_bios.rom */
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/* Colecovision not supported yet
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int fd = ci->open("/coleco_bios.rom", O_RDONLY);
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if ( fd >= 0 ) {
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ci->read(fd, coleco_bios, 0x2000);
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ci->close(fd);
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set_coleco_bios( &sgc_emu, coleco_bios );
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}
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*/
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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("SGC: 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("SGC: 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("SGC: file load failed\n");
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return CODEC_ERROR;
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}
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if ((err = Sgc_load_mem(&sgc_emu, buf, ci->filesize))) {
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DEBUGF("SGC: Sgc_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 (sgc_emu.m3u.size > 0)
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sgc_emu.track_count = sgc_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 >= sgc_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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enum codec_command_action 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 >= sgc_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 = Sgc_play(&sgc_emu, CHUNK_SIZE, samples);
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if (err || Track_ended(&sgc_emu)) {
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track++;
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if (track >= sgc_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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