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>

1 files changed, 212 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/raac.c b/lib/rbcodec/codecs/raac.c
new file mode 100644
index 0000000000..0ef7e715bc
--- /dev/null
+++ b/lib/rbcodec/codecs/raac.c
@@ -0,0 +1,212 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2009 Mohamed Tarek
+ *
+ * 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 "librm/rm.h"
+#include "libfaad/common.h"
+#include "libfaad/structs.h"
+#include "libfaad/decoder.h"
+/* rockbox: not used
+#include "libfaad/output.h"
+*/
+
+CODEC_HEADER
+
+static void init_rm(RMContext *rmctx)
+{
+    memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext));
+}
+
+static RMContext rmctx;
+static RMPacket pkt;
+
+/* 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, 29);
+    }
+
+    return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
+{
+    static NeAACDecFrameInfo frame_info;
+    NeAACDecHandle decoder;
+    size_t n;
+    unsigned int i;
+    unsigned char* buffer;
+    int err, consumed, pkt_offset, skipped = 0;
+    uint32_t s = 0; /* sample rate */
+    unsigned char c = 0; /* channels */
+    int playback_on = -1;
+    size_t resume_offset;
+    intptr_t param;
+    enum codec_command_action action = CODEC_ACTION_NULL;
+
+    if (codec_init()) {
+        DEBUGF("FAAD: Codec init error\n");
+        return CODEC_ERROR;
+    }
+
+    resume_offset = ci->id3->offset;
+
+    ci->memset(&rmctx,0,sizeof(RMContext));
+    ci->memset(&pkt,0,sizeof(RMPacket));
+
+    ci->seek_buffer(0);
+
+    init_rm(&rmctx);    
+    ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
+    codec_set_replaygain(ci->id3);
+   
+    /* initialise the sound converter */
+    decoder = NeAACDecOpen();
+    
+    if (!decoder) {
+        DEBUGF("FAAD: Decode open error\n");
+        return CODEC_ERROR;
+    }
+
+    NeAACDecConfigurationPtr conf = NeAACDecGetCurrentConfiguration(decoder);
+    conf->outputFormat = FAAD_FMT_16BIT; /* irrelevant, we don't convert */
+    NeAACDecSetConfiguration(decoder, conf);    
+    
+    decoder->config.defObjectType = rmctx.codec_extradata[0];
+    decoder->config.defSampleRate = rmctx.sample_rate;      
+    err = NeAACDecInit(decoder, NULL, 0, &s, &c);    
+   
+    if (err) {
+        DEBUGF("FAAD: DecInit: %d, %d\n", err, decoder->object_type);
+        return CODEC_ERROR;
+    }
+    
+    /* check for a mid-track resume and force a seek time accordingly */
+    if(resume_offset > rmctx.data_offset + DATA_HEADER_SIZE) {
+        resume_offset -= rmctx.data_offset + DATA_HEADER_SIZE;
+        /* put number of subpackets to skip in resume_offset */
+        resume_offset /= (rmctx.block_align + PACKET_HEADER_SIZE);
+        param = (int)resume_offset * ((rmctx.block_align * 8 * 1000)/rmctx.bit_rate);
+        action = CODEC_ACTION_SEEK_TIME;
+    }
+    ci->set_elapsed(0);
+    ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE);
+
+    /* The main decoding loop */
+    while (1) {
+        if (action == CODEC_ACTION_NULL)
+            action = ci->get_command(&param);
+
+        if (action == CODEC_ACTION_HALT)
+            break;
+
+        if (action == CODEC_ACTION_SEEK_TIME) {
+            /* Do not allow seeking beyond the file's length */
+            if ((unsigned) param > ci->id3->length) {
+                ci->set_elapsed(ci->id3->length);
+                ci->seek_complete();
+                break;
+            }       
+
+            ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE);            
+
+            /* Seek to the start of the track */
+            if (param == 0) {
+                ci->set_elapsed(0);
+                ci->seek_complete();
+                action = CODEC_ACTION_NULL;
+                continue;          
+            }
+            
+            skipped = 0;                                                                                       
+            while(1) {                
+                buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000);               
+                pkt_offset = skipped - pkt.length;
+                consumed = rm_get_packet(&buffer, &rmctx, &pkt);
+                if(consumed < 0 && playback_on != 0) {
+                    if(playback_on == -1) {
+                    /* Error only if packet-parsing failed and playback hadn't started */
+                        DEBUGF("rm_get_packet failed\n");
+                        ci->seek_complete();
+                        return CODEC_ERROR;
+                    }
+                    else {
+                        ci->seek_complete();
+                        return CODEC_OK;
+                    }
+                }
+                skipped += pkt.length;
+
+                if(pkt.timestamp > (unsigned)param)
+                    break;
+                
+                ci->advance_buffer(pkt.length);
+            }           
+            ci->seek_buffer(pkt_offset + rmctx.data_offset + DATA_HEADER_SIZE);
+            buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000);
+            NeAACDecPostSeekReset(decoder, decoder->frame);
+            ci->set_elapsed(pkt.timestamp);
+            ci->seek_complete();            
+        }
+
+        action = CODEC_ACTION_NULL;
+
+        /* Request the required number of bytes from the input buffer */ 
+        buffer=ci->request_buffer(&n,rmctx.audio_framesize + 1000);        
+        consumed = rm_get_packet(&buffer, &rmctx, &pkt);
+
+        if(consumed < 0 && playback_on != 0) {
+            if(playback_on == -1) {
+            /* Error only if packet-parsing failed and playback hadn't started */
+                DEBUGF("rm_get_packet failed\n");
+                return CODEC_ERROR;
+            }
+            else
+                break;
+        }
+        
+        playback_on = 1;
+        if (pkt.timestamp >= ci->id3->length)
+            break;
+
+        /* Decode one block - returned samples will be host-endian */                           
+        for(i = 0; i < rmctx.sub_packet_cnt; i++) {
+            NeAACDecDecode(decoder, &frame_info, buffer, rmctx.sub_packet_lengths[i]);
+            buffer += rmctx.sub_packet_lengths[i];                      
+            if (frame_info.error > 0) {
+                DEBUGF("FAAD: decode error '%s'\n", NeAACDecGetErrorMessage(frame_info.error));
+                return CODEC_ERROR;
+            }
+            ci->pcmbuf_insert(decoder->time_out[0],
+                              decoder->time_out[1],
+                              decoder->frameLength);
+            ci->set_elapsed(pkt.timestamp);            
+        }                                       
+        
+        ci->advance_buffer(pkt.length);              
+    }
+
+    return CODEC_OK;
+}