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authorSean Bartell <wingedtachikoma@gmail.com>2011-06-25 21:32:25 -0400
committerNils Wallménius <nils@rockbox.org>2012-04-25 22:13:20 +0200
commitf40bfc9267b13b54e6379dfe7539447662879d24 (patch)
tree9b20069d5e62809ff434061ad730096836f916f2 /apps/codecs/a52.c
parenta0009907de7a0107d49040d8a180f140e2eff299 (diff)
downloadrockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz
rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'apps/codecs/a52.c')
-rw-r--r--apps/codecs/a52.c192
1 files changed, 0 insertions, 192 deletions
diff --git a/apps/codecs/a52.c b/apps/codecs/a52.c
deleted file mode 100644
index cb6e66dd05..0000000000
--- a/apps/codecs/a52.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2005 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 <inttypes.h> /* Needed by a52.h */
-#include <codecs/liba52/config-a52.h>
-#include <codecs/liba52/a52.h>
-
-CODEC_HEADER
-
-#define BUFFER_SIZE 4096
-
-#define A52_SAMPLESPERFRAME (6*256)
-
-static a52_state_t *state;
-static unsigned long samplesdone;
-static unsigned long frequency;
-
-/* used outside liba52 */
-static uint8_t buf[3840] IBSS_ATTR;
-
-static inline void output_audio(sample_t *samples)
-{
- ci->yield();
- ci->pcmbuf_insert(&samples[0], &samples[256], 256);
-}
-
-static void a52_decode_data(uint8_t *start, uint8_t *end)
-{
- static uint8_t *bufptr = buf;
- static uint8_t *bufpos = buf + 7;
- /*
- * sample_rate and flags are static because this routine could
- * exit between the a52_syncinfo() and the ao_setup(), and we want
- * to have the same values when we get back !
- */
- static int sample_rate;
- static int flags;
- int bit_rate;
- int len;
-
- while (1) {
- len = end - start;
- if (!len)
- break;
- if (len > bufpos - bufptr)
- len = bufpos - bufptr;
- memcpy(bufptr, start, len);
- bufptr += len;
- start += len;
- if (bufptr == bufpos) {
- if (bufpos == buf + 7) {
- int length;
-
- length = a52_syncinfo(buf, &flags, &sample_rate, &bit_rate);
- if (!length) {
- //DEBUGF("skip\n");
- for (bufptr = buf; bufptr < buf + 6; bufptr++)
- bufptr[0] = bufptr[1];
- continue;
- }
- bufpos = buf + length;
- } else {
- /* Unity gain is 1 << 26, and we want to end up on 28 bits
- of precision instead of the default 30.
- */
- level_t level = 1 << 24;
- sample_t bias = 0;
- int i;
-
- /* This is the configuration for the downmixing: */
- flags = A52_STEREO | A52_ADJUST_LEVEL;
-
- if (a52_frame(state, buf, &flags, &level, bias))
- goto error;
- a52_dynrng(state, NULL, NULL);
- frequency = sample_rate;
-
- /* An A52 frame consists of 6 blocks of 256 samples
- So we decode and output them one block at a time */
- for (i = 0; i < 6; i++) {
- if (a52_block(state))
- goto error;
- output_audio(a52_samples(state));
- samplesdone += 256;
- }
- ci->set_elapsed(samplesdone/(frequency/1000));
- bufptr = buf;
- bufpos = buf + 7;
- continue;
- error:
- //logf("Error decoding A52 stream\n");
- bufptr = buf;
- bufpos = buf + 7;
- }
- }
- }
-}
-
-/* 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_STEREO_MODE, STEREO_NONINTERLEAVED);
- ci->configure(DSP_SET_SAMPLE_DEPTH, 28);
- }
- else if (reason == CODEC_UNLOAD) {
- if (state)
- a52_free(state);
- }
-
- return CODEC_OK;
-}
-
-/* this is called for each file to process */
-enum codec_status codec_run(void)
-{
- size_t n;
- unsigned char *filebuf;
- int sample_loc;
- intptr_t param;
-
- if (codec_init())
- return CODEC_ERROR;
-
- ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
- codec_set_replaygain(ci->id3);
-
- /* Intialise the A52 decoder and check for success */
- state = a52_init(0);
-
- samplesdone = 0;
-
- /* The main decoding loop */
- if (ci->id3->offset) {
- if (ci->seek_buffer(ci->id3->offset)) {
- samplesdone = (ci->id3->offset / ci->id3->bytesperframe) *
- A52_SAMPLESPERFRAME;
- ci->set_elapsed(samplesdone/(ci->id3->frequency / 1000));
- }
- }
- else {
- ci->seek_buffer(ci->id3->first_frame_offset);
- ci->set_elapsed(0);
- }
-
- while (1) {
- enum codec_command_action action = ci->get_command(&param);
-
- if (action == CODEC_ACTION_HALT)
- break;
-
- if (action == CODEC_ACTION_SEEK_TIME) {
- sample_loc = param/1000 * ci->id3->frequency;
-
- if (ci->seek_buffer((sample_loc/A52_SAMPLESPERFRAME)*ci->id3->bytesperframe)) {
- samplesdone = sample_loc;
- ci->set_elapsed(samplesdone/(ci->id3->frequency/1000));
- }
- ci->seek_complete();
- }
-
- filebuf = ci->request_buffer(&n, BUFFER_SIZE);
-
- if (n == 0) /* End of Stream */
- break;
-
- a52_decode_data(filebuf, filebuf + n);
- ci->advance_buffer(n);
- }
-
- return CODEC_OK;
-}