From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/vox.c | 201 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 lib/rbcodec/codecs/vox.c (limited to 'lib/rbcodec/codecs/vox.c') diff --git a/lib/rbcodec/codecs/vox.c b/lib/rbcodec/codecs/vox.c new file mode 100644 index 0000000000..279d003162 --- /dev/null +++ b/lib/rbcodec/codecs/vox.c @@ -0,0 +1,201 @@ +/*************************************************************************** + * __________ __ ___. + * 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(enum codec_entry_call_reason reason) +{ + if (reason == CODEC_LOAD) { + /* Generic codec initialisation */ + ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1); + } + + return CODEC_OK; +} + +/* this is called for each file to process */ +enum codec_status codec_run(void) +{ + uint32_t decodedsamples; + size_t n; + int bufcount; + int endofstream; + uint8_t *voxbuf; + off_t firstblockposn = 0; /* position of the first block in file */ + const struct pcm_codec *codec; + intptr_t param; + + if (codec_init()) { + DEBUGF("codec_init() error\n"); + return CODEC_ERROR; + } + + codec_set_replaygain(ci->id3); + + /* Need to save offset for later use (cleared indirectly by advance_buffer) */ + bytesdone = ci->id3->offset; + ci->seek_buffer(0); + + 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 */ + firstblockposn = 0; + decodedsamples = 0; + ci->advance_buffer(firstblockposn); + + /* + * 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"); + return CODEC_ERROR; + } + + if (!codec->set_format(&format)) { + return CODEC_ERROR; + } + + if (format.numbytes == 0) { + DEBUGF("CODEC_ERROR: data size is 0\n"); + return CODEC_ERROR; + } + + /* 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"); + return CODEC_ERROR; + } + + ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); + ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); + + /* make sure we're at the correct offset */ + if (bytesdone > (uint32_t) firstblockposn) { + /* Round down to previous block */ + struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn, + PCM_SEEK_POS, &read_buffer); + + if (newpos->pos > format.numbytes) { + return CODEC_OK; + } + if (ci->seek_buffer(firstblockposn + newpos->pos)) + { + bytesdone = newpos->pos; + decodedsamples = newpos->samples; + } + } else { + /* already where we need to be */ + bytesdone = 0; + } + + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + + /* The main decoder loop */ + endofstream = 0; + + while (!endofstream) { + enum codec_command_action action = ci->get_command(¶m); + + if (action == CODEC_ACTION_HALT) + break; + + if (action == CODEC_ACTION_SEEK_TIME) { + struct pcm_pos *newpos = codec->get_seek_pos(param, PCM_SEEK_TIME, + &read_buffer); + + if (newpos->pos > format.numbytes) + { + ci->set_elapsed(ci->id3->length); + ci->seek_complete(); + break; + } + + if (ci->seek_buffer(firstblockposn + newpos->pos)) + { + bytesdone = newpos->pos; + decodedsamples = newpos->samples; + } + + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + 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; + } + + if (codec->decode(voxbuf, n, samples, &bufcount) == CODEC_ERROR) + { + DEBUGF("codec error\n"); + return CODEC_ERROR; + } + + 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); + } + + return CODEC_OK; +} -- cgit v1.2.3