Rename var: val -> energy
[FFMpeg-mirror/DVCPRO-HD.git] / libavcodec / libfaad.c
blob32f06ac8f8ce7c2b4f75c837c7ab7921192256ff
1 /*
2 * Faad decoder
3 * Copyright (c) 2003 Zdenek Kabelac.
4 * Copyright (c) 2004 Thomas Raivio.
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 /**
24 * @file faad.c
25 * AAC decoder.
27 * still a bit unfinished - but it plays something
30 #include "avcodec.h"
31 #include "faad.h"
33 #ifndef FAADAPI
34 #define FAADAPI
35 #endif
38 * when CONFIG_LIBFAADBIN is defined the libfaad will be opened at runtime
40 //#undef CONFIG_LIBFAADBIN
41 //#define CONFIG_LIBFAADBIN
43 #ifdef CONFIG_LIBFAADBIN
44 #include <dlfcn.h>
45 static const char* libfaadname = "libfaad.so";
46 #else
47 #define dlopen(a)
48 #define dlclose(a)
49 #endif
51 typedef struct {
52 void* handle; /* dlopen handle */
53 void* faac_handle; /* FAAD library handle */
54 int sample_size;
55 int init;
57 /* faad calls */
58 faacDecHandle FAADAPI (*faacDecOpen)(void);
59 faacDecConfigurationPtr FAADAPI (*faacDecGetCurrentConfiguration)(faacDecHandle hDecoder);
60 #ifndef FAAD2_VERSION
61 int FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
62 faacDecConfigurationPtr config);
63 int FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
64 unsigned char *buffer,
65 unsigned long *samplerate,
66 unsigned long *channels);
67 int FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
68 unsigned long SizeOfDecoderSpecificInfo,
69 unsigned long *samplerate, unsigned long *channels);
70 int FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
71 unsigned char *buffer,
72 unsigned long *bytesconsumed,
73 short *sample_buffer,
74 unsigned long *samples);
75 #else
76 unsigned char FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
77 faacDecConfigurationPtr config);
78 long FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
79 unsigned char *buffer,
80 unsigned long buffer_size,
81 unsigned long *samplerate,
82 unsigned char *channels);
83 char FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
84 unsigned long SizeOfDecoderSpecificInfo,
85 unsigned long *samplerate, unsigned char *channels);
86 void *FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
87 faacDecFrameInfo *hInfo,
88 unsigned char *buffer,
89 unsigned long buffer_size);
90 char* FAADAPI (*faacDecGetErrorMessage)(unsigned char errcode);
91 #endif
93 void FAADAPI (*faacDecClose)(faacDecHandle hDecoder);
96 } FAACContext;
98 static const unsigned long faac_srates[] =
100 96000, 88200, 64000, 48000, 44100, 32000,
101 24000, 22050, 16000, 12000, 11025, 8000
104 static void channel_setup(AVCodecContext *avctx)
106 #ifdef FAAD2_VERSION
107 FAACContext *s = avctx->priv_data;
108 if (avctx->request_channels > 0 && avctx->request_channels == 2 &&
109 avctx->request_channels < avctx->channels) {
110 faacDecConfigurationPtr faac_cfg;
111 avctx->channels = 2;
112 faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle);
113 faac_cfg->downMatrix = 1;
114 s->faacDecSetConfiguration(s->faac_handle, faac_cfg);
116 #endif
119 static int faac_init_mp4(AVCodecContext *avctx)
121 FAACContext *s = avctx->priv_data;
122 unsigned long samplerate;
123 #ifndef FAAD2_VERSION
124 unsigned long channels;
125 #else
126 unsigned char channels;
127 #endif
128 int r = 0;
130 if (avctx->extradata){
131 r = s->faacDecInit2(s->faac_handle, (uint8_t*) avctx->extradata,
132 avctx->extradata_size,
133 &samplerate, &channels);
134 if (r < 0){
135 av_log(avctx, AV_LOG_ERROR,
136 "faacDecInit2 failed r:%d sr:%ld ch:%ld s:%d\n",
137 r, samplerate, (long)channels, avctx->extradata_size);
138 } else {
139 avctx->sample_rate = samplerate;
140 avctx->channels = channels;
141 channel_setup(avctx);
142 s->init = 1;
146 return r;
149 static int faac_decode_frame(AVCodecContext *avctx,
150 void *data, int *data_size,
151 uint8_t *buf, int buf_size)
153 FAACContext *s = avctx->priv_data;
154 #ifndef FAAD2_VERSION
155 unsigned long bytesconsumed;
156 short *sample_buffer = NULL;
157 unsigned long samples;
158 int out;
159 #else
160 faacDecFrameInfo frame_info;
161 void *out;
162 #endif
163 if(buf_size == 0)
164 return 0;
165 #ifndef FAAD2_VERSION
166 out = s->faacDecDecode(s->faac_handle,
167 (unsigned char*)buf,
168 &bytesconsumed,
169 data,
170 &samples);
171 samples *= s->sample_size;
172 if (data_size)
173 *data_size = samples;
174 return (buf_size < (int)bytesconsumed)
175 ? buf_size : (int)bytesconsumed;
176 #else
178 if(!s->init){
179 unsigned long srate;
180 unsigned char channels;
181 int r = s->faacDecInit(s->faac_handle, buf, buf_size, &srate, &channels);
182 if(r < 0){
183 av_log(avctx, AV_LOG_ERROR, "faac: codec init failed.\n");
184 return -1;
186 avctx->sample_rate = srate;
187 avctx->channels = channels;
188 channel_setup(avctx);
189 s->init = 1;
192 out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size);
194 if (frame_info.error > 0) {
195 av_log(avctx, AV_LOG_ERROR, "faac: frame decoding failed: %s\n",
196 s->faacDecGetErrorMessage(frame_info.error));
197 return -1;
200 frame_info.samples *= s->sample_size;
201 memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one
203 if (data_size)
204 *data_size = frame_info.samples;
206 return (buf_size < (int)frame_info.bytesconsumed)
207 ? buf_size : (int)frame_info.bytesconsumed;
208 #endif
211 static av_cold int faac_decode_end(AVCodecContext *avctx)
213 FAACContext *s = avctx->priv_data;
215 s->faacDecClose(s->faac_handle);
217 dlclose(s->handle);
218 return 0;
221 static av_cold int faac_decode_init(AVCodecContext *avctx)
223 FAACContext *s = avctx->priv_data;
224 faacDecConfigurationPtr faac_cfg;
226 #ifdef CONFIG_LIBFAADBIN
227 const char* err = 0;
229 s->handle = dlopen(libfaadname, RTLD_LAZY);
230 if (!s->handle)
232 av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n",
233 libfaadname, dlerror());
234 return -1;
237 #define dfaac(a) do { \
238 const char* n = AV_STRINGIFY(faacDec ## a); \
239 if (!err && !(s->faacDec ## a = dlsym(s->handle, n))) { \
240 err = n; \
242 } while(0)
243 #else /* !CONFIG_LIBFAADBIN */
244 #define dfaac(a) s->faacDec ## a = faacDec ## a
245 #endif /* CONFIG_LIBFAADBIN */
247 // resolve all needed function calls
248 dfaac(Open);
249 dfaac(Close);
250 dfaac(GetCurrentConfiguration);
251 dfaac(SetConfiguration);
252 dfaac(Init);
253 dfaac(Init2);
254 dfaac(Decode);
255 #ifdef FAAD2_VERSION
256 dfaac(GetErrorMessage);
257 #endif
259 #undef dfaac
261 #ifdef CONFIG_LIBFAADBIN
262 if (err) {
263 dlclose(s->handle);
264 av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n",
265 err, libfaadname);
266 return -1;
268 #endif
270 s->faac_handle = s->faacDecOpen();
271 if (!s->faac_handle) {
272 av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n");
273 faac_decode_end(avctx);
274 return -1;
278 faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle);
280 if (faac_cfg) {
281 switch (avctx->bits_per_sample) {
282 case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_sample); break;
283 default:
284 case 16:
285 #ifdef FAAD2_VERSION
286 faac_cfg->outputFormat = FAAD_FMT_16BIT;
287 #endif
288 s->sample_size = 2;
289 break;
290 case 24:
291 #ifdef FAAD2_VERSION
292 faac_cfg->outputFormat = FAAD_FMT_24BIT;
293 #endif
294 s->sample_size = 3;
295 break;
296 case 32:
297 #ifdef FAAD2_VERSION
298 faac_cfg->outputFormat = FAAD_FMT_32BIT;
299 #endif
300 s->sample_size = 4;
301 break;
304 faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate;
305 faac_cfg->defObjectType = LC;
308 s->faacDecSetConfiguration(s->faac_handle, faac_cfg);
310 faac_init_mp4(avctx);
312 if(!s->init && avctx->channels > 0)
313 channel_setup(avctx);
315 return 0;
318 #define AAC_CODEC(id, name, long_name_) \
319 AVCodec name ## _decoder = { \
320 #name, \
321 CODEC_TYPE_AUDIO, \
322 id, \
323 sizeof(FAACContext), \
324 faac_decode_init, \
325 NULL, \
326 faac_decode_end, \
327 faac_decode_frame, \
328 .long_name = long_name_, \
331 // FIXME - raw AAC files - maybe just one entry will be enough
332 AAC_CODEC(CODEC_ID_AAC, libfaad, "libfaad AAC (Advanced Audio Codec)");
333 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
334 // If it's mp4 file - usually embeded into Qt Mov
335 AAC_CODEC(CODEC_ID_MPEG4AAC, mpeg4aac, "libfaad AAC (Advanced Audio Codec)");
336 #endif
338 #undef AAC_CODEC