diff options
Diffstat (limited to 'apps/codecs/vox.c')
| -rw-r--r-- | apps/codecs/vox.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/apps/codecs/vox.c b/apps/codecs/vox.c new file mode 100644 index 0000000000..44701fafb8 --- /dev/null +++ b/apps/codecs/vox.c @@ -0,0 +1,181 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2010 Yoshihisa Uchida + * + * 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 "codeclib.h" +#include "codecs/libpcm/support_formats.h" + +CODEC_HEADER + +/* vox codec (Dialogic telephony file formats) */ + +#define PCM_SAMPLE_SIZE (2048) + +static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR; + +static struct pcm_format format; +static uint32_t bytesdone; + +static uint8_t *read_buffer(size_t *realsize) +{ + uint8_t *buffer = (uint8_t *)ci->request_buffer(realsize, format.chunksize); + if (bytesdone + (*realsize) > format.numbytes) + *realsize = format.numbytes - bytesdone; + bytesdone += *realsize; + ci->advance_buffer(*realsize); + return buffer; +} + +/* this is the codec entry point */ +enum codec_status codec_main(void) +{ + int status = CODEC_OK; + uint32_t decodedsamples; + size_t n; + int bufcount; + int endofstream; + uint8_t *voxbuf; + off_t firstblockposn; /* position of the first block in file */ + const struct pcm_codec *codec; + int offset = 0; + + /* Generic codec initialisation */ + ci->configure(DSP_SET_SAMPLE_DEPTH, 28); + +next_track: + if (codec_init()) { + DEBUGF("codec_init() error\n"); + status = CODEC_ERROR; + goto exit; + } + + while (!*ci->taginfo_ready && !ci->stop_codec) + ci->sleep(1); + + codec_set_replaygain(ci->id3); + + ci->memset(&format, 0, sizeof(struct pcm_format)); + + /* set format */ + format.channels = 1; + format.bitspersample = 4; + format.numbytes = ci->id3->filesize; + format.blockalign = 1; + + /* advance to first WAVE chunk */ + ci->advance_buffer(offset); + + firstblockposn = offset; + + decodedsamples = 0; + bytesdone = 0; + + /* + * get codec + * supports dialogic oki adpcm only + */ + codec = get_dialogic_oki_adpcm_codec(); + if (!codec) + { + DEBUGF("CODEC_ERROR: dialogic oki adpcm codec does not load.\n"); + status = CODEC_ERROR; + goto done; + } + + if (!codec->set_format(&format)) + { + status = CODEC_ERROR; + goto done; + } + + if (format.numbytes == 0) { + DEBUGF("CODEC_ERROR: data size is 0\n"); + status = CODEC_ERROR; + goto done; + } + + /* check chunksize */ + if (format.chunksize * 2 > PCM_SAMPLE_SIZE) + format.chunksize = PCM_SAMPLE_SIZE / 2; + if (format.chunksize == 0) + { + DEBUGF("CODEC_ERROR: chunksize is 0\n"); + status = CODEC_ERROR; + goto done; + } + + ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); + ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); + + /* The main decoder loop */ + endofstream = 0; + + while (!endofstream) { + ci->yield(); + if (ci->stop_codec || ci->new_track) { + break; + } + + if (ci->seek_time) { + struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, &read_buffer); + + decodedsamples = newpos->samples; + if (newpos->pos > format.numbytes) + break; + if (ci->seek_buffer(firstblockposn + newpos->pos)) + { + bytesdone = newpos->pos; + } + ci->seek_complete(); + } + + voxbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize); + if (n == 0) + break; /* End of stream */ + if (bytesdone + n > format.numbytes) { + n = format.numbytes - bytesdone; + endofstream = 1; + } + + status = codec->decode(voxbuf, n, samples, &bufcount); + if (status == CODEC_ERROR) + { + DEBUGF("codec error\n"); + goto done; + } + + ci->pcmbuf_insert(samples, NULL, bufcount); + ci->advance_buffer(n); + bytesdone += n; + decodedsamples += bufcount; + + if (bytesdone >= format.numbytes) + endofstream = 1; + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + } + status = CODEC_OK; + +done: + if (ci->request_next_track()) + goto next_track; + +exit: + return status; +} |