6a74465e9d73af326479eb0e06dbb7544e615672
[libav.git] / libavcodec / libfaac.c
1 /*
2 * Interface to libfaac for aac encoding
3 * Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.com>
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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
29 #include "avcodec.h"
30 #include "audio_frame_queue.h"
31 #include "internal.h"
32
33
34 /* libfaac has an encoder delay of 1024 samples */
35 #define FAAC_DELAY_SAMPLES 1024
36
37 typedef struct FaacAudioContext {
38 faacEncHandle faac_handle;
39 AudioFrameQueue afq;
40 } FaacAudioContext;
41
42
43 static av_cold int Faac_encode_close(AVCodecContext *avctx)
44 {
45 FaacAudioContext *s = avctx->priv_data;
46
47 #if FF_API_OLD_ENCODE_AUDIO
48 av_freep(&avctx->coded_frame);
49 #endif
50 av_freep(&avctx->extradata);
51 ff_af_queue_close(&s->afq);
52
53 if (s->faac_handle)
54 faacEncClose(s->faac_handle);
55
56 return 0;
57 }
58
59 static av_cold int Faac_encode_init(AVCodecContext *avctx)
60 {
61 FaacAudioContext *s = avctx->priv_data;
62 faacEncConfigurationPtr faac_cfg;
63 unsigned long samples_input, max_bytes_output;
64 int ret;
65
66 /* number of channels */
67 if (avctx->channels < 1 || avctx->channels > 6) {
68 av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
69 ret = AVERROR(EINVAL);
70 goto error;
71 }
72
73 s->faac_handle = faacEncOpen(avctx->sample_rate,
74 avctx->channels,
75 &samples_input, &max_bytes_output);
76 if (!s->faac_handle) {
77 av_log(avctx, AV_LOG_ERROR, "error in faacEncOpen()\n");
78 ret = AVERROR_UNKNOWN;
79 goto error;
80 }
81
82 /* check faac version */
83 faac_cfg = faacEncGetCurrentConfiguration(s->faac_handle);
84 if (faac_cfg->version != FAAC_CFG_VERSION) {
85 av_log(avctx, AV_LOG_ERROR, "wrong libfaac version (compiled for: %d, using %d)\n", FAAC_CFG_VERSION, faac_cfg->version);
86 ret = AVERROR(EINVAL);
87 goto error;
88 }
89
90 /* put the options in the configuration struct */
91 switch(avctx->profile) {
92 case FF_PROFILE_AAC_MAIN:
93 faac_cfg->aacObjectType = MAIN;
94 break;
95 case FF_PROFILE_UNKNOWN:
96 case FF_PROFILE_AAC_LOW:
97 faac_cfg->aacObjectType = LOW;
98 break;
99 case FF_PROFILE_AAC_SSR:
100 faac_cfg->aacObjectType = SSR;
101 break;
102 case FF_PROFILE_AAC_LTP:
103 faac_cfg->aacObjectType = LTP;
104 break;
105 default:
106 av_log(avctx, AV_LOG_ERROR, "invalid AAC profile\n");
107 ret = AVERROR(EINVAL);
108 goto error;
109 }
110 faac_cfg->mpegVersion = MPEG4;
111 faac_cfg->useTns = 0;
112 faac_cfg->allowMidside = 1;
113 faac_cfg->bitRate = avctx->bit_rate / avctx->channels;
114 faac_cfg->bandWidth = avctx->cutoff;
115 if(avctx->flags & CODEC_FLAG_QSCALE) {
116 faac_cfg->bitRate = 0;
117 faac_cfg->quantqual = avctx->global_quality / FF_QP2LAMBDA;
118 }
119 faac_cfg->outputFormat = 1;
120 faac_cfg->inputFormat = FAAC_INPUT_16BIT;
121
122 avctx->frame_size = samples_input / avctx->channels;
123
124 #if FF_API_OLD_ENCODE_AUDIO
125 avctx->coded_frame= avcodec_alloc_frame();
126 if (!avctx->coded_frame) {
127 ret = AVERROR(ENOMEM);
128 goto error;
129 }
130 #endif
131
132 /* Set decoder specific info */
133 avctx->extradata_size = 0;
134 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
135
136 unsigned char *buffer = NULL;
137 unsigned long decoder_specific_info_size;
138
139 if (!faacEncGetDecoderSpecificInfo(s->faac_handle, &buffer,
140 &decoder_specific_info_size)) {
141 avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
142 if (!avctx->extradata) {
143 ret = AVERROR(ENOMEM);
144 goto error;
145 }
146 avctx->extradata_size = decoder_specific_info_size;
147 memcpy(avctx->extradata, buffer, avctx->extradata_size);
148 faac_cfg->outputFormat = 0;
149 }
150 #undef free
151 free(buffer);
152 #define free please_use_av_free
153 }
154
155 if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
156 av_log(avctx, AV_LOG_ERROR, "libfaac doesn't support this output format!\n");
157 ret = AVERROR(EINVAL);
158 goto error;
159 }
160
161 avctx->delay = FAAC_DELAY_SAMPLES;
162 ff_af_queue_init(avctx, &s->afq);
163
164 return 0;
165 error:
166 Faac_encode_close(avctx);
167 return ret;
168 }
169
170 static int Faac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
171 const AVFrame *frame, int *got_packet_ptr)
172 {
173 FaacAudioContext *s = avctx->priv_data;
174 int bytes_written, ret;
175 int num_samples = frame ? frame->nb_samples : 0;
176 void *samples = frame ? frame->data[0] : NULL;
177
178 if ((ret = ff_alloc_packet(avpkt, (7 + 768) * avctx->channels))) {
179 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
180 return ret;
181 }
182
183 bytes_written = faacEncEncode(s->faac_handle, samples,
184 num_samples * avctx->channels,
185 avpkt->data, avpkt->size);
186 if (bytes_written < 0) {
187 av_log(avctx, AV_LOG_ERROR, "faacEncEncode() error\n");
188 return bytes_written;
189 }
190
191 /* add current frame to the queue */
192 if (frame) {
193 if ((ret = ff_af_queue_add(&s->afq, frame) < 0))
194 return ret;
195 }
196
197 if (!bytes_written)
198 return 0;
199
200 /* Get the next frame pts/duration */
201 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
202 &avpkt->duration);
203
204 avpkt->size = bytes_written;
205 *got_packet_ptr = 1;
206 return 0;
207 }
208
209 static const AVProfile profiles[] = {
210 { FF_PROFILE_AAC_MAIN, "Main" },
211 { FF_PROFILE_AAC_LOW, "LC" },
212 { FF_PROFILE_AAC_SSR, "SSR" },
213 { FF_PROFILE_AAC_LTP, "LTP" },
214 { FF_PROFILE_UNKNOWN },
215 };
216
217 AVCodec ff_libfaac_encoder = {
218 .name = "libfaac",
219 .type = AVMEDIA_TYPE_AUDIO,
220 .id = CODEC_ID_AAC,
221 .priv_data_size = sizeof(FaacAudioContext),
222 .init = Faac_encode_init,
223 .encode2 = Faac_encode_frame,
224 .close = Faac_encode_close,
225 .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
226 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
227 .long_name = NULL_IF_CONFIG_SMALL("libfaac AAC (Advanced Audio Codec)"),
228 .profiles = NULL_IF_CONFIG_SMALL(profiles),
229 };