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-rw-r--r--lib/rbcodec/codecs/vtx.c138
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diff --git a/lib/rbcodec/codecs/vtx.c b/lib/rbcodec/codecs/vtx.c
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+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * VTX Codec for rockbox based on the Ayumi engine
+ *
+ * Ayumi engine Written by Peter Sovietov in 2015
+ * Ported to rockbox '2019 by Roman Stolyarov
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <codecs/lib/codeclib.h>
+#include "libayumi/ayumi_render.h"
+
+CODEC_HEADER
+
+#define VTX_SAMPLE_RATE 44100
+
+/* Maximum number of bytes to process in one iteration */
+#define CHUNK_SIZE (1024*2)
+
+static int16_t samples[CHUNK_SIZE] IBSS_ATTR;
+extern ayumi_render_t ay;
+
+/****************** rockbox interface ******************/
+
+/* this is the codec entry point */
+enum codec_status codec_main(enum codec_entry_call_reason reason)
+{
+ if (reason == CODEC_LOAD) {
+ /* we only render 16 bits */
+ ci->configure(DSP_SET_SAMPLE_DEPTH, 16);
+
+ /* 44 Khz, Interleaved stereo */
+ ci->configure(DSP_SET_FREQUENCY, VTX_SAMPLE_RATE);
+ ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
+ }
+
+ return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
+{
+ uint8_t *buf;
+ size_t n;
+ intptr_t param;
+ uint32_t elapsed_time;
+ long smp;
+ int res;
+
+ /* reset values */
+ elapsed_time = 0;
+ param = ci->id3->elapsed;
+
+ DEBUGF("VTX: next_track\n");
+ if (codec_init()) {
+ return CODEC_ERROR;
+ }
+
+ codec_set_replaygain(ci->id3);
+
+ /* Read the entire file */
+ DEBUGF("VTX: request file\n");
+ ci->seek_buffer(0);
+ buf = ci->request_buffer(&n, ci->filesize);
+ if (!buf || n < (size_t)ci->filesize) {
+ DEBUGF("VTX: file load failed\n");
+ return CODEC_ERROR;
+ }
+
+ res = AyumiRender_LoadFile((void *)buf, ci->filesize);
+ if (!res) {
+ DEBUGF("VTX: AyumiRender_LoadFile failed\n");
+ return CODEC_ERROR;
+ }
+
+ res = AyumiRender_AyInit(ay.info.chiptype, VTX_SAMPLE_RATE, ay.info.chipfreq, ay.info.playerfreq, 1);
+ if (!res) {
+ DEBUGF("VTX: AyumiRender_AyInit failed\n");
+ return CODEC_ERROR;
+ }
+
+ res = AyumiRender_SetLayout(ay.info.layout, 0);
+ if (!res) {
+ DEBUGF("VTX: AyumiRender_SetLayout failed\n");
+ return CODEC_ERROR;
+ }
+
+ if (param) {
+ goto resume_start;
+ }
+
+ /* The main decoder loop */
+ while (1) {
+ long action = ci->get_command(&param);
+
+ if (action == CODEC_ACTION_HALT)
+ break;
+
+ if (action == CODEC_ACTION_SEEK_TIME) {
+ resume_start:
+ ci->set_elapsed(param);
+ elapsed_time = param;
+ ulong sample = ((ulong)elapsed_time * 441) / 10;
+ AyumiRender_Seek(sample);
+ ci->seek_complete();
+ }
+
+ /* Generate audio buffer */
+ smp = AyumiRender_AySynth((void *)&samples[0], CHUNK_SIZE >> 1);
+
+ ci->pcmbuf_insert(samples, NULL, smp);
+
+ /* Set elapsed time for one track files */
+ elapsed_time += smp * 10 / 441;
+ ci->set_elapsed(elapsed_time);
+
+ if (AyumiRender_GetPos() >= AyumiRender_GetMaxPos())
+ break;
+ }
+
+ return CODEC_OK;
+}