summaryrefslogtreecommitdiffstats
path: root/apps/codecs/raac.c
blob: cfc5b4a4602359fbf8db2f36b0e50038912ec49a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id: aac.c 19743 2009-01-10 21:10:56Z zagor $
 *
 * 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"
#include "libfaad/output.h"

CODEC_HEADER
#define DATA_HEADER_SIZE 18
static void init_rm(RMContext *rmctx)
{
    memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext));
}

RMContext rmctx;
RMPacket pkt;
/* this is the codec entry point */
enum codec_status codec_main(void)
{
    static NeAACDecFrameInfo frame_info;
    NeAACDecHandle decoder;
    size_t n;    
    int32_t *output;
    unsigned int i;
    unsigned char* buffer;
    int err, consumed, pkt_offset, skipped = 0;
    uint32_t s = 0; /* sample rate */
    unsigned char c = 0; /* channels */
    /* Generic codec initialisation */
    ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
    ci->configure(DSP_SET_SAMPLE_DEPTH, 16);

next_track:
    err = CODEC_OK;

    if (codec_init()) {
        DEBUGF("FAAD: Codec init error\n");
        return CODEC_ERROR;
    }

    while (!*ci->taginfo_ready && !ci->stop_codec)
        ci->sleep(1);

    ci->memset(&rmctx,0,sizeof(RMContext));
    ci->memset(&pkt,0,sizeof(RMPacket));
    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");
        err = CODEC_ERROR;
        goto done;
    }   
    NeAACDecConfigurationPtr conf = NeAACDecGetCurrentConfiguration(decoder);
    conf->outputFormat = FAAD_FMT_16BIT;    
    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);
        err = CODEC_ERROR;
        goto done;
    }   
    ci->id3->frequency = s;    
    ci->set_elapsed(0);
    ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE);

    /* The main decoding loop */
seek_start:
    while (1) {
        ci->yield();
        if (ci->stop_codec || ci->new_track) {
            break;
        }

        if (ci->seek_time) {            
            
            /* Do not allow seeking beyond the file's length */
            if ((unsigned) ci->seek_time > ci->id3->length) {
                ci->seek_complete();
                goto done;
            }       

            ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE);            

            /* Seek to the start of the track */
            if (ci->seek_time == 1) {
                ci->set_elapsed(0);
                ci->seek_complete();
                goto seek_start;           
            }
            
            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) {
                     DEBUGF("rm_get_packet failed\n");
                     return CODEC_ERROR;
                }
                skipped += pkt.length;
                if(pkt.timestamp > (unsigned)ci->seek_time) 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);
            ci->seek_complete();            
        }

        /* 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) {
             DEBUGF("rm_get_packet failed\n");
             return CODEC_ERROR;
        }

        if (pkt.timestamp >= ci->id3->length)
            goto done;
        /* Decode one block - returned samples will be host-endian */                           
        for(i = 0; i < rmctx.sub_packet_cnt; i++) {
            output = (int32_t *)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));
                err = CODEC_ERROR;
                goto exit;
            }
            output = (int32_t *) output_to_PCM(decoder, decoder->time_out, output,
                rmctx.nb_channels, decoder->frameLength, decoder->config.outputFormat);
            ci->pcmbuf_insert(output, NULL, frame_info.samples/rmctx.nb_channels);
            ci->set_elapsed(pkt.timestamp);            
        }                                       
        
        ci->advance_buffer(pkt.length);              
    }

    err = CODEC_OK;

done:
    if (ci->request_next_track())
        goto next_track;

exit:
    return err;
}