2 * Interface to libaacplus for aac+ (sbr+ps) encoding
3 * Copyright (c) 2010 tipok <piratfm@gmail.com>
5 * This file is part of FFmpeg.
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.
12 * FFmpeg is distributed in the hope that it will be useful,
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
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
24 * Interface to libaacplus for aac+ (sbr+ps) encoding.
32 typedef struct aacPlusAudioContext {
33 aacplusEncHandle aacplus_handle;
34 unsigned long max_output_bytes;
35 unsigned long samples_input;
36 } aacPlusAudioContext;
38 static av_cold int aacPlus_encode_init(AVCodecContext *avctx)
40 aacPlusAudioContext *s = avctx->priv_data;
41 aacplusEncConfiguration *aacplus_cfg;
43 /* number of channels */
44 if (avctx->channels < 1 || avctx->channels > 2) {
45 av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
49 s->aacplus_handle = aacplusEncOpen(avctx->sample_rate, avctx->channels,
50 &s->samples_input, &s->max_output_bytes);
51 if(!s->aacplus_handle) {
52 av_log(avctx, AV_LOG_ERROR, "can't open encoder\n");
56 /* check aacplus version */
57 aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle);
59 /* put the options in the configuration struct */
60 if(avctx->profile != FF_PROFILE_AAC_LOW && avctx->profile != FF_PROFILE_UNKNOWN) {
61 av_log(avctx, AV_LOG_ERROR, "invalid AAC profile: %d, only LC supported\n", avctx->profile);
62 aacplusEncClose(s->aacplus_handle);
66 aacplus_cfg->bitRate = avctx->bit_rate;
67 aacplus_cfg->bandWidth = avctx->cutoff;
68 aacplus_cfg->outputFormat = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
69 aacplus_cfg->inputFormat = avctx->sample_fmt == AV_SAMPLE_FMT_FLT ? AACPLUS_INPUT_FLOAT : AACPLUS_INPUT_16BIT;
70 if (!aacplusEncSetConfiguration(s->aacplus_handle, aacplus_cfg)) {
71 av_log(avctx, AV_LOG_ERROR, "libaacplus doesn't support this output format!\n");
75 avctx->frame_size = s->samples_input / avctx->channels;
77 /* Set decoder specific info */
78 avctx->extradata_size = 0;
79 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
81 unsigned char *buffer = NULL;
82 unsigned long decoder_specific_info_size;
84 if (aacplusEncGetDecoderSpecificInfo(s->aacplus_handle, &buffer,
85 &decoder_specific_info_size) == 1) {
86 avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
87 avctx->extradata_size = decoder_specific_info_size;
88 memcpy(avctx->extradata, buffer, avctx->extradata_size);
95 static int aacPlus_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
96 const AVFrame *frame, int *got_packet)
98 aacPlusAudioContext *s = avctx->priv_data;
99 int32_t *input_buffer = (int32_t *)frame->data[0];
102 if ((ret = ff_alloc_packet2(avctx, pkt, s->max_output_bytes)) < 0)
105 pkt->size = aacplusEncEncode(s->aacplus_handle, input_buffer,
106 s->samples_input, pkt->data, pkt->size);
108 pkt->pts = frame->pts;
112 static av_cold int aacPlus_encode_close(AVCodecContext *avctx)
114 aacPlusAudioContext *s = avctx->priv_data;
116 av_freep(&avctx->extradata);
118 aacplusEncClose(s->aacplus_handle);
122 static const AVProfile profiles[] = {
123 { FF_PROFILE_AAC_LOW, "LC" },
124 { FF_PROFILE_UNKNOWN },
127 AVCodec ff_libaacplus_encoder = {
128 .name = "libaacplus",
129 .type = AVMEDIA_TYPE_AUDIO,
130 .id = AV_CODEC_ID_AAC,
131 .priv_data_size = sizeof(aacPlusAudioContext),
132 .init = aacPlus_encode_init,
133 .encode2 = aacPlus_encode_frame,
134 .close = aacPlus_encode_close,
135 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
137 AV_SAMPLE_FMT_NONE },
138 .long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"),
139 .profiles = profiles,
140 .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,