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/wma.c | 196 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 196 insertions(+) create mode 100755 lib/rbcodec/codecs/wma.c (limited to 'lib/rbcodec/codecs/wma.c') diff --git a/lib/rbcodec/codecs/wma.c b/lib/rbcodec/codecs/wma.c new file mode 100755 index 0000000000..f9501ffad3 --- /dev/null +++ b/lib/rbcodec/codecs/wma.c @@ -0,0 +1,196 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2007 Dave Chapman + * + * 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 "libasf/asf.h" +#include "libwma/wmadec.h" + +CODEC_HEADER + +/* NOTE: WMADecodeContext is 120152 bytes (on x86) */ +static WMADecodeContext wmadec; + +/* 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, 29); + } + + return CODEC_OK; +} + +/* this is called for each file to process */ +enum codec_status codec_run(void) +{ + uint32_t elapsedtime; + asf_waveformatex_t wfx; + size_t resume_offset; + int i; + int wmares = 0; + int res = 0; + uint8_t* audiobuf; + int audiobufsize; + int packetlength = 0; + int errcount = 0; + intptr_t param; + + /* Remember the resume position - when the codec is opened, the + playback engine will reset it. */ + resume_offset = ci->id3->offset; + +restart_track: + + /* Proper reset of the decoder context. */ + memset(&wmadec, 0, sizeof(wmadec)); + + if (codec_init()) { + LOGF("WMA: Error initialising codec\n"); + return CODEC_ERROR; + } + + /* Copy the format metadata we've stored in the id3 TOC field. This + saves us from parsing it again here. */ + memcpy(&wfx, ci->id3->toc, sizeof(wfx)); + + ci->seek_buffer(ci->id3->first_frame_offset); + if (wma_decode_init(&wmadec,&wfx) < 0) { + LOGF("WMA: Unsupported or corrupt file\n"); + return CODEC_ERROR; + } + + if (resume_offset > ci->id3->first_frame_offset) + { + /* Get start of current packet */ + int packet_offset = (resume_offset - ci->id3->first_frame_offset) + % wfx.packet_size; + ci->seek_buffer(resume_offset - packet_offset); + elapsedtime = asf_get_timestamp(&i); + } + else + { + /* Now advance the file position to the first frame */ + ci->seek_buffer(ci->id3->first_frame_offset); + elapsedtime = 0; + } + + ci->set_elapsed(elapsedtime); + + resume_offset = 0; + ci->configure(DSP_SWITCH_FREQUENCY, wfx.rate); + ci->configure(DSP_SET_STEREO_MODE, wfx.channels == 1 ? + STEREO_MONO : STEREO_NONINTERLEAVED); + codec_set_replaygain(ci->id3); + + /* The main decoding loop */ + while (res >= 0) + { + enum codec_command_action action = ci->get_command(¶m); + + if (action == CODEC_ACTION_HALT) + break; + + /* Deal with any pending seek requests */ + if (action == CODEC_ACTION_SEEK_TIME) { + + /*flush the wma decoder state*/ + wmadec.last_superframe_len = 0; + wmadec.last_bitoffset = 0; + + /*zero the frame out buffer so we don't overlap with a + stale samples*/ + memset((*(wmadec.frame_out)), 0, + sizeof(fixed32) * MAX_CHANNELS * BLOCK_MAX_SIZE * 2); + + if (param == 0) { + ci->set_elapsed(0); + ci->seek_complete(); + goto restart_track; /* Pretend you never saw this... */ + } + + elapsedtime = asf_seek(param, &wfx); + if (elapsedtime < 1){ + ci->set_elapsed(0); + ci->seek_complete(); + break; + } + /*DEBUGF("Seek returned %d\n", (int)elapsedtime);*/ + + ci->set_elapsed(elapsedtime); + ci->seek_complete(); + } + errcount = 0; +new_packet: + res = asf_read_packet(&audiobuf, &audiobufsize, &packetlength, &wfx); + + if (res < 0) { + /* We'll try to recover from a parse error a certain number of + * times. If we succeed, the error counter will be reset. + */ + + if (res == ASF_ERROR_EOF) { + /* File ended - not an error */ + break; + } + + errcount++; + DEBUGF("read_packet error %d, errcount %d\n",wmares, errcount); + if (errcount > 5) { + return CODEC_ERROR; + } else { + ci->advance_buffer(packetlength); + goto new_packet; + } + } else if (res > 0) { + wma_decode_superframe_init(&wmadec, audiobuf, audiobufsize); + + for (i=0; i < wmadec.nb_frames; i++) + { + wmares = wma_decode_superframe_frame(&wmadec, + audiobuf, audiobufsize); + + ci->yield (); + + if (wmares < 0) { + /* Do the above, but for errors in decode. */ + errcount++; + DEBUGF("WMA decode error %d, errcount %d\n",wmares, errcount); + if (errcount > 5) { + return CODEC_ERROR; + } else { + ci->advance_buffer(packetlength); + goto new_packet; + } + } else if (wmares > 0) { + ci->pcmbuf_insert((*wmadec.frame_out)[0], (*wmadec.frame_out)[1], wmares); + elapsedtime += (wmares*10)/(wfx.rate/100); + ci->set_elapsed(elapsedtime); + } + } + } + + ci->advance_buffer(packetlength); + } + + /*LOGF("WMA: Decoded %ld samples\n",elapsedtime*wfx.rate/1000);*/ + return CODEC_OK; +} -- cgit v1.2.3