Rename --enable-swscaler --> enable-swscale to be consistent with the
[ffmpeg.git] / libavcodec / libfaad.c
1 /*
2  * Faad decoder
3  * Copyright (c) 2003 Zdenek Kabelac.
4  * Copyright (c) 2004 Thomas Raivio.
5  *
6  * This file is part of FFmpeg.
7  *
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.
12  *
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.
17  *
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
21  */
22
23 /**
24  * @file faad.c
25  * AAC decoder.
26  *
27  * still a bit unfinished - but it plays something
28  */
29
30 #include "avcodec.h"
31 #include "faad.h"
32
33 #ifndef FAADAPI
34 #define FAADAPI
35 #endif
36
37 /*
38  * when CONFIG_LIBFAADBIN is defined the libfaad will be opened at runtime
39  */
40 //#undef CONFIG_LIBFAADBIN
41 //#define CONFIG_LIBFAADBIN
42
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
50
51 typedef struct {
52     void* handle;               /* dlopen handle */
53     void* faac_handle;          /* FAAD library handle */
54     int sample_size;
55     int init;
56
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
92
93     void FAADAPI (*faacDecClose)(faacDecHandle hDecoder);
94
95
96 } FAACContext;
97
98 static const unsigned long faac_srates[] =
99 {
100     96000, 88200, 64000, 48000, 44100, 32000,
101     24000, 22050, 16000, 12000, 11025, 8000
102 };
103
104 static void channel_setup(AVCodecContext *avctx)
105 {
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);
115     }
116 #endif
117 }
118
119 static int faac_init_mp4(AVCodecContext *avctx)
120 {
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;
129
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;
143         }
144     }
145
146     return r;
147 }
148
149 static int faac_decode_frame(AVCodecContext *avctx,
150                              void *data, int *data_size,
151                              uint8_t *buf, int buf_size)
152 {
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
177
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: %s\n",
184                    s->faacDecGetErrorMessage(frame_info.error));
185             return -1;
186         }
187         avctx->sample_rate = srate;
188         avctx->channels = channels;
189         channel_setup(avctx);
190         s->init = 1;
191     }
192
193     out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size);
194
195     if (frame_info.error > 0) {
196         av_log(avctx, AV_LOG_ERROR, "faac: frame decoding failed: %s\n",
197                s->faacDecGetErrorMessage(frame_info.error));
198         return -1;
199     }
200
201     frame_info.samples *= s->sample_size;
202     memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one
203
204     if (data_size)
205         *data_size = frame_info.samples;
206
207     return (buf_size < (int)frame_info.bytesconsumed)
208         ? buf_size : (int)frame_info.bytesconsumed;
209 #endif
210 }
211
212 static int faac_decode_end(AVCodecContext *avctx)
213 {
214     FAACContext *s = avctx->priv_data;
215
216     s->faacDecClose(s->faac_handle);
217
218     dlclose(s->handle);
219     return 0;
220 }
221
222 static int faac_decode_init(AVCodecContext *avctx)
223 {
224     FAACContext *s = avctx->priv_data;
225     faacDecConfigurationPtr faac_cfg;
226
227 #ifdef CONFIG_LIBFAADBIN
228     const char* err = 0;
229
230     s->handle = dlopen(libfaadname, RTLD_LAZY);
231     if (!s->handle)
232     {
233         av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n",
234                libfaadname, dlerror());
235         return -1;
236     }
237
238 #define dfaac(a) do {                                                   \
239         const char* n = AV_STRINGIFY(faacDec ## a);                     \
240         if (!err && !(s->faacDec ## a = dlsym(s->handle, n))) {         \
241             err = n;                                                    \
242         }                                                               \
243     } while(0)
244 #else  /* !CONFIG_LIBFAADBIN */
245 #define dfaac(a)     s->faacDec ## a = faacDec ## a
246 #endif /* CONFIG_LIBFAADBIN */
247
248     // resolve all needed function calls
249     dfaac(Open);
250     dfaac(Close);
251     dfaac(GetCurrentConfiguration);
252     dfaac(SetConfiguration);
253     dfaac(Init);
254     dfaac(Init2);
255     dfaac(Decode);
256 #ifdef FAAD2_VERSION
257     dfaac(GetErrorMessage);
258 #endif
259
260 #undef dfaac
261
262 #ifdef CONFIG_LIBFAADBIN
263     if (err) {
264         dlclose(s->handle);
265         av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n",
266                err, libfaadname);
267         return -1;
268     }
269 #endif
270
271     s->faac_handle = s->faacDecOpen();
272     if (!s->faac_handle) {
273         av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n");
274         faac_decode_end(avctx);
275         return -1;
276     }
277
278
279     faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle);
280
281     if (faac_cfg) {
282         switch (avctx->bits_per_sample) {
283         case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_sample); break;
284         default:
285         case 16:
286 #ifdef FAAD2_VERSION
287             faac_cfg->outputFormat = FAAD_FMT_16BIT;
288 #endif
289             s->sample_size = 2;
290             break;
291         case 24:
292 #ifdef FAAD2_VERSION
293             faac_cfg->outputFormat = FAAD_FMT_24BIT;
294 #endif
295             s->sample_size = 3;
296             break;
297         case 32:
298 #ifdef FAAD2_VERSION
299             faac_cfg->outputFormat = FAAD_FMT_32BIT;
300 #endif
301             s->sample_size = 4;
302             break;
303         }
304
305         faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate;
306         faac_cfg->defObjectType = LC;
307     }
308
309     s->faacDecSetConfiguration(s->faac_handle, faac_cfg);
310
311     faac_init_mp4(avctx);
312
313     if(!s->init && avctx->channels > 0)
314         channel_setup(avctx);
315
316     return 0;
317 }
318
319 #define AAC_CODEC(id, name)     \
320 AVCodec name ## _decoder = {    \
321     #name,                      \
322     CODEC_TYPE_AUDIO,           \
323     id,                         \
324     sizeof(FAACContext),        \
325     faac_decode_init,           \
326     NULL,                       \
327     faac_decode_end,            \
328     faac_decode_frame,          \
329 }
330
331 // FIXME - raw AAC files - maybe just one entry will be enough
332 AAC_CODEC(CODEC_ID_AAC, libfaad);
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);
336 #endif
337
338 #undef AAC_CODEC