1 /*
2 * Interface to libfaac for aac encoding
3 * Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Interface to libfaac for aac encoding.
25 */
26
27 #include <faac.h>
28
34
35
36 /* libfaac has an encoder delay of 1024 samples */
37 #define FAAC_DELAY_SAMPLES 1024
38
43
45 {
47
48 #if FF_API_OLD_ENCODE_AUDIO
50 #endif
53
56
57 return 0;
58 }
59
61 { 2, 0, 1 }, //< C L R
62 { 2, 0, 1, 3 }, //< C L R Cs
63 { 2, 0, 1, 3, 4 }, //< C L R Ls Rs
64 { 2, 0, 1, 4, 5, 3 }, //< C L R Ls Rs LFE
65 };
66
68 {
70 faacEncConfigurationPtr faac_cfg;
71 unsigned long samples_input, max_bytes_output;
72 int ret;
73
74 /* number of channels */
78 goto error;
79 }
80
83 &samples_input, &max_bytes_output);
87 goto error;
88 }
89
90 /* check faac version */
91 faac_cfg = faacEncGetCurrentConfiguration(s->
faac_handle);
92 if (faac_cfg->version != FAAC_CFG_VERSION) {
93 av_log(avctx,
AV_LOG_ERROR,
"wrong libfaac version (compiled for: %d, using %d)\n", FAAC_CFG_VERSION, faac_cfg->version);
95 goto error;
96 }
97
98 /* put the options in the configuration struct */
101 faac_cfg->aacObjectType =
MAIN;
102 break;
105 faac_cfg->aacObjectType = LOW;
106 break;
108 faac_cfg->aacObjectType = SSR;
109 break;
111 faac_cfg->aacObjectType = LTP;
112 break;
113 default:
116 goto error;
117 }
118 faac_cfg->mpegVersion = MPEG4;
119 faac_cfg->useTns = 0;
120 faac_cfg->allowMidside = 1;
122 faac_cfg->bandWidth = avctx->
cutoff;
124 faac_cfg->bitRate = 0;
126 }
127 faac_cfg->outputFormat = 1;
128 faac_cfg->inputFormat = FAAC_INPUT_16BIT;
132
134
135 #if FF_API_OLD_ENCODE_AUDIO
139 goto error;
140 }
141 #endif
142
143 /* Set decoder specific info */
146
148 unsigned long decoder_specific_info_size;
149
150 if (!faacEncGetDecoderSpecificInfo(s->
faac_handle, &buffer,
151 &decoder_specific_info_size)) {
155 goto error;
156 }
159 faac_cfg->outputFormat = 0;
160 }
161 free(buffer);
162 }
163
164 if (!faacEncSetConfiguration(s->
faac_handle, faac_cfg)) {
167 goto error;
168 }
169
172
173 return 0;
174 error:
176 return ret;
177 }
178
181 {
183 int bytes_written, ret;
184 int num_samples = frame ? frame->
nb_samples : 0;
186
189 return ret;
190 }
191
192 bytes_written = faacEncEncode(s->
faac_handle, samples,
195 if (bytes_written < 0) {
197 return bytes_written;
198 }
199
200 /* add current frame to the queue */
201 if (frame) {
203 return ret;
204 }
205
206 if (!bytes_written)
207 return 0;
208
209 /* Get the next frame pts/duration */
212
213 avpkt->
size = bytes_written;
214 *got_packet_ptr = 1;
215 return 0;
216 }
217
224 };
225
233 0
234 };
235
250 };