4231c2c83f
This codec requires floating point. Original author: Peter Sovietov Ported to Rockbox: Roman Skylarov Further integration and bugfixes: Solomon Peachy Change-Id: I781ecd3592dfcdbbc694063334350342534f1d6c
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* VTX Codec for rockbox based on the Ayumi engine
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*
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* Ayumi engine Written by Peter Sovietov in 2015
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* Ported to rockbox '2019 by Roman Stolyarov
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <codecs/lib/codeclib.h>
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#include "libayumi/ayumi_render.h"
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CODEC_HEADER
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#define VTX_SAMPLE_RATE 44100
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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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extern ayumi_render_t ay;
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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, VTX_SAMPLE_RATE);
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ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
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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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uint8_t *buf;
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size_t n;
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intptr_t param;
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uint32_t elapsed_time;
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long smp;
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int res;
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/* reset values */
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elapsed_time = 0;
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param = ci->id3->elapsed;
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DEBUGF("VTX: 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("VTX: 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("VTX: file load failed\n");
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return CODEC_ERROR;
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}
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res = AyumiRender_LoadFile((void *)buf, ci->filesize);
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if (!res) {
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DEBUGF("VTX: AyumiRender_LoadFile failed\n");
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return CODEC_ERROR;
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}
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res = AyumiRender_AyInit(ay.info.chiptype, VTX_SAMPLE_RATE, ay.info.chipfreq, ay.info.playerfreq, 1);
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if (!res) {
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DEBUGF("VTX: AyumiRender_AyInit failed\n");
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return CODEC_ERROR;
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}
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res = AyumiRender_SetLayout(ay.info.layout, 0);
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if (!res) {
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DEBUGF("VTX: AyumiRender_SetLayout failed\n");
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return CODEC_ERROR;
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}
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if (param) {
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goto resume_start;
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}
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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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resume_start:
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ci->set_elapsed(param);
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elapsed_time = param;
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ulong sample = ((ulong)elapsed_time * 441) / 10;
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AyumiRender_Seek(sample);
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ci->seek_complete();
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}
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/* Generate audio buffer */
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smp = AyumiRender_AySynth((void *)&samples[0], CHUNK_SIZE >> 1);
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ci->pcmbuf_insert(samples, NULL, smp);
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/* Set elapsed time for one track files */
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elapsed_time += smp * 10 / 441;
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ci->set_elapsed(elapsed_time);
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if (AyumiRender_GetPos() >= AyumiRender_GetMaxPos())
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break;
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}
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return CODEC_OK;
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}
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