| 1 | /*
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| 2 | * Faad decoder
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| 3 | * Copyright (c) 2003 Zdenek Kabelac.
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| 4 | * Copyright (c) 2004 Thomas Raivio.
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 19 | */
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| 20 |
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| 21 | /**
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| 22 | * @file faad.c
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| 23 | * AAC decoder.
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| 24 | *
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| 25 | * still a bit unfinished - but it plays something
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| 26 | */
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| 27 |
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| 28 | #include "avcodec.h"
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| 29 | #include "faad.h"
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| 30 |
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| 31 | #ifndef FAADAPI
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| 32 | #define FAADAPI
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| 33 | #endif
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| 34 |
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| 35 | /*
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| 36 | * when CONFIG_FAADBIN is defined the libfaad will be opened at runtime
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| 37 | */
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| 38 | //#undef CONFIG_FAADBIN
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| 39 | //#define CONFIG_FAADBIN
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| 40 |
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| 41 | #ifdef CONFIG_FAADBIN
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| 42 | #include <dlfcn.h>
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| 43 | static const char* libfaadname = "libfaad.so.0";
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| 44 | #else
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| 45 | #define dlopen(a)
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| 46 | #define dlclose(a)
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| 47 | #endif
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| 48 |
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| 49 | typedef struct {
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| 50 | void* handle; /* dlopen handle */
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| 51 | void* faac_handle; /* FAAD library handle */
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| 52 | int sample_size;
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| 53 | int init;
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| 54 |
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| 55 | /* faad calls */
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| 56 | faacDecHandle FAADAPI (*faacDecOpen)(void);
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| 57 | faacDecConfigurationPtr FAADAPI (*faacDecGetCurrentConfiguration)(faacDecHandle hDecoder);
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| 58 | #ifndef FAAD2_VERSION
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| 59 | int FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
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| 60 | faacDecConfigurationPtr config);
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| 61 | int FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
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| 62 | unsigned char *buffer,
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| 63 | unsigned long *samplerate,
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| 64 | unsigned long *channels);
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| 65 | int FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
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| 66 | unsigned long SizeOfDecoderSpecificInfo,
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| 67 | unsigned long *samplerate, unsigned long *channels);
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| 68 | int FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
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| 69 | unsigned char *buffer,
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| 70 | unsigned long *bytesconsumed,
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| 71 | short *sample_buffer,
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| 72 | unsigned long *samples);
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| 73 | #else
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| 74 | unsigned char FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
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| 75 | faacDecConfigurationPtr config);
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| 76 | long FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
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| 77 | unsigned char *buffer,
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| 78 | unsigned long buffer_size,
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| 79 | unsigned long *samplerate,
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| 80 | unsigned char *channels);
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| 81 | char FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
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| 82 | unsigned long SizeOfDecoderSpecificInfo,
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| 83 | unsigned long *samplerate, unsigned char *channels);
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| 84 | void *FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
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| 85 | faacDecFrameInfo *hInfo,
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| 86 | unsigned char *buffer,
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| 87 | unsigned long buffer_size);
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| 88 | char* FAADAPI (*faacDecGetErrorMessage)(unsigned char errcode);
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| 89 | #endif
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| 90 |
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| 91 | void FAADAPI (*faacDecClose)(faacDecHandle hDecoder);
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| 92 |
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| 93 |
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| 94 | } FAACContext;
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| 95 |
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| 96 | static const unsigned long faac_srates[] =
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| 97 | {
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| 98 | 96000, 88200, 64000, 48000, 44100, 32000,
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| 99 | 24000, 22050, 16000, 12000, 11025, 8000
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| 100 | };
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| 101 |
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| 102 | static int faac_init_mp4(AVCodecContext *avctx)
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| 103 | {
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| 104 | FAACContext *s = (FAACContext *) avctx->priv_data;
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| 105 | unsigned long samplerate;
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| 106 | #ifndef FAAD2_VERSION
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| 107 | unsigned long channels;
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| 108 | #else
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| 109 | unsigned char channels;
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| 110 | #endif
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| 111 | int r = 0;
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| 112 |
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| 113 | if (avctx->extradata){
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| 114 | r = s->faacDecInit2(s->faac_handle, (uint8_t*) avctx->extradata,
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| 115 | avctx->extradata_size,
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| 116 | &samplerate, &channels);
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| 117 | if (r < 0){
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| 118 | av_log(avctx, AV_LOG_ERROR,
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| 119 | "faacDecInit2 failed r:%d sr:%ld ch:%ld s:%d\n",
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| 120 | r, samplerate, (long)channels, avctx->extradata_size);
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| 121 | } else {
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| 122 | avctx->sample_rate = samplerate;
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| 123 | avctx->channels = channels;
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| 124 | s->init = 1;
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | return r;
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| 129 | }
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| 130 |
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| 131 | static int faac_decode_frame(AVCodecContext *avctx,
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| 132 | void *data, int *data_size,
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| 133 | uint8_t *buf, int buf_size)
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| 134 | {
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| 135 | FAACContext *s = (FAACContext *) avctx->priv_data;
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| 136 | #ifndef FAAD2_VERSION
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| 137 | unsigned long bytesconsumed;
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| 138 | short *sample_buffer = NULL;
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| 139 | unsigned long samples;
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| 140 | int out;
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| 141 | #else
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| 142 | faacDecFrameInfo frame_info;
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| 143 | void *out;
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| 144 | #endif
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| 145 | if(buf_size == 0)
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| 146 | return 0;
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| 147 | #ifndef FAAD2_VERSION
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| 148 | out = s->faacDecDecode(s->faac_handle,
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| 149 | (unsigned char*)buf,
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| 150 | &bytesconsumed,
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| 151 | data,
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| 152 | &samples);
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| 153 | samples *= s->sample_size;
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| 154 | if (data_size)
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| 155 | *data_size = samples;
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| 156 | return (buf_size < (int)bytesconsumed)
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| 157 | ? buf_size : (int)bytesconsumed;
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| 158 | #else
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| 159 |
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| 160 | if(!s->init){
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| 161 | unsigned long srate;
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| 162 | unsigned char channels;
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| 163 | int r = s->faacDecInit(s->faac_handle, buf, buf_size, &srate, &channels);
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| 164 | if(r < 0){
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| 165 | av_log(avctx, AV_LOG_ERROR, "faac: codec init failed: %s\n",
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| 166 | s->faacDecGetErrorMessage(frame_info.error));
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| 167 | return -1;
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| 168 | }
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| 169 | avctx->sample_rate = srate;
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| 170 | avctx->channels = channels;
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| 171 | s->init = 1;
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| 172 | }
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| 173 |
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| 174 | out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size);
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| 175 |
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| 176 | if (frame_info.error > 0) {
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| 177 | av_log(avctx, AV_LOG_ERROR, "faac: frame decoding failed: %s\n",
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| 178 | s->faacDecGetErrorMessage(frame_info.error));
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| 179 | return -1;
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| 180 | }
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| 181 |
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| 182 | frame_info.samples *= s->sample_size;
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| 183 | memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one
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| 184 |
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| 185 | if (data_size)
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| 186 | *data_size = frame_info.samples;
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| 187 |
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| 188 | return (buf_size < (int)frame_info.bytesconsumed)
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| 189 | ? buf_size : (int)frame_info.bytesconsumed;
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| 190 | #endif
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| 191 | }
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| 192 |
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| 193 | static int faac_decode_end(AVCodecContext *avctx)
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| 194 | {
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| 195 | FAACContext *s = (FAACContext *) avctx->priv_data;
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| 196 |
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| 197 | if (s->faacDecClose)
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| 198 | s->faacDecClose(s->faac_handle);
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| 199 |
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| 200 | dlclose(s->handle);
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| 201 | return 0;
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| 202 | }
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| 203 |
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| 204 | static int faac_decode_init(AVCodecContext *avctx)
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| 205 | {
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| 206 | FAACContext *s = (FAACContext *) avctx->priv_data;
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| 207 | faacDecConfigurationPtr faac_cfg;
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| 208 |
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| 209 | #ifdef CONFIG_FAADBIN
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| 210 | const char* err = 0;
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| 211 |
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| 212 | s->handle = dlopen(libfaadname, RTLD_LAZY);
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| 213 | if (!s->handle)
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| 214 | {
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| 215 | av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n",
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| 216 | libfaadname, dlerror());
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| 217 | return -1;
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| 218 | }
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| 219 | #define dfaac(a, b) \
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| 220 | do { static const char* n = "faacDec" #a; \
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| 221 | if ((s->faacDec ## a = b dlsym( s->handle, n )) == NULL) { err = n; break; } } while(0)
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| 222 | for(;;) {
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| 223 | #else /* !CONFIG_FAADBIN */
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| 224 | #define dfaac(a, b) s->faacDec ## a = faacDec ## a
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| 225 | #endif /* CONFIG_FAADBIN */
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| 226 |
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| 227 | // resolve all needed function calls
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| 228 | dfaac(Open, (faacDecHandle FAADAPI (*)(void)));
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| 229 | dfaac(GetCurrentConfiguration, (faacDecConfigurationPtr
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| 230 | FAADAPI (*)(faacDecHandle)));
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| 231 | #ifndef FAAD2_VERSION
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| 232 | dfaac(SetConfiguration, (int FAADAPI (*)(faacDecHandle,
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| 233 | faacDecConfigurationPtr)));
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| 234 |
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| 235 | dfaac(Init, (int FAADAPI (*)(faacDecHandle, unsigned char*,
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| 236 | unsigned long*, unsigned long*)));
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| 237 | dfaac(Init2, (int FAADAPI (*)(faacDecHandle, unsigned char*,
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| 238 | unsigned long, unsigned long*,
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| 239 | unsigned long*)));
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| 240 | dfaac(Close, (void FAADAPI (*)(faacDecHandle hDecoder)));
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| 241 | dfaac(Decode, (int FAADAPI (*)(faacDecHandle, unsigned char*,
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| 242 | unsigned long*, short*, unsigned long*)));
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| 243 | #else
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| 244 | dfaac(SetConfiguration, (unsigned char FAADAPI (*)(faacDecHandle,
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| 245 | faacDecConfigurationPtr)));
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| 246 | dfaac(Init, (long FAADAPI (*)(faacDecHandle, unsigned char*,
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| 247 | unsigned long, unsigned long*, unsigned char*)));
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| 248 | dfaac(Init2, (char FAADAPI (*)(faacDecHandle, unsigned char*,
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| 249 | unsigned long, unsigned long*,
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| 250 | unsigned char*)));
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| 251 | dfaac(Decode, (void *FAADAPI (*)(faacDecHandle, faacDecFrameInfo*,
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| 252 | unsigned char*, unsigned long)));
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| 253 | dfaac(GetErrorMessage, (char* FAADAPI (*)(unsigned char)));
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| 254 | #endif
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| 255 | #undef dfacc
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| 256 |
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| 257 | #ifdef CONFIG_FAADBIN
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| 258 | break;
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| 259 | }
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| 260 | if (err) {
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| 261 | dlclose(s->handle);
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| 262 | av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n",
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| 263 | err, libfaadname);
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| 264 | return -1;
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| 265 | }
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| 266 | #endif
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| 267 |
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| 268 | s->faac_handle = s->faacDecOpen();
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| 269 | if (!s->faac_handle) {
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| 270 | av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n");
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| 271 | faac_decode_end(avctx);
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| 272 | return -1;
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| 273 | }
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| 274 |
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| 275 |
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| 276 | faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle);
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| 277 |
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| 278 | if (faac_cfg) {
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| 279 | switch (avctx->bits_per_sample) {
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| 280 | case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_sample); break;
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| 281 | default:
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| 282 | case 16:
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| 283 | #ifdef FAAD2_VERSION
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| 284 | faac_cfg->outputFormat = FAAD_FMT_16BIT;
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| 285 | #endif
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| 286 | s->sample_size = 2;
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| 287 | break;
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| 288 | case 24:
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| 289 | #ifdef FAAD2_VERSION
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| 290 | faac_cfg->outputFormat = FAAD_FMT_24BIT;
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| 291 | #endif
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| 292 | s->sample_size = 3;
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| 293 | break;
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| 294 | case 32:
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| 295 | #ifdef FAAD2_VERSION
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| 296 | faac_cfg->outputFormat = FAAD_FMT_32BIT;
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| 297 | #endif
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| 298 | s->sample_size = 4;
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| 299 | break;
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| 300 | }
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| 301 |
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| 302 | faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate;
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| 303 | faac_cfg->defObjectType = LC;
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| 304 | }
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| 305 |
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| 306 | s->faacDecSetConfiguration(s->faac_handle, faac_cfg);
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| 307 |
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| 308 | faac_init_mp4(avctx);
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| 309 |
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| 310 | return 0;
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| 311 | }
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| 312 |
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| 313 | #define AAC_CODEC(id, name) \
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| 314 | AVCodec name ## _decoder = { \
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| 315 | #name, \
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| 316 | CODEC_TYPE_AUDIO, \
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| 317 | id, \
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| 318 | sizeof(FAACContext), \
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| 319 | faac_decode_init, \
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| 320 | NULL, \
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| 321 | faac_decode_end, \
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| 322 | faac_decode_frame, \
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| 323 | }
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| 324 |
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| 325 | // FIXME - raw AAC files - maybe just one entry will be enough
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| 326 | AAC_CODEC(CODEC_ID_AAC, aac);
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| 327 | // If it's mp4 file - usually embeded into Qt Mov
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| 328 | AAC_CODEC(CODEC_ID_MPEG4AAC, mpeg4aac);
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| 329 |
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| 330 | #undef AAC_CODEC
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