FFmpeg
mpegaudioenc_fixed.c
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1 /*
2  * The simplest mpeg audio layer 2 encoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
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 
23 #include "mpegaudioenc_template.c"
24 
26  .name = "mp2fixed",
27  .long_name = NULL_IF_CONFIG_SMALL("MP2 fixed point (MPEG audio layer 2)"),
28  .type = AVMEDIA_TYPE_AUDIO,
29  .id = AV_CODEC_ID_MP2,
30  .priv_data_size = sizeof(MpegAudioContext),
32  .encode2 = MPA_encode_frame,
33  .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
35  .supported_samplerates = (const int[]){
36  44100, 48000, 32000, 22050, 24000, 16000, 0
37  },
38  .channel_layouts = (const uint64_t[]){ AV_CH_LAYOUT_MONO,
40  0 },
41  .defaults = mp2_defaults,
42  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
43 };
AVCodec
AVCodec.
Definition: codec.h:202
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
ff_mp2fixed_encoder
const AVCodec ff_mp2fixed_encoder
Definition: mpegaudioenc_fixed.c:25
mp2_defaults
static const AVCodecDefault mp2_defaults[]
Definition: mpegaudioenc_template.c:782
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: codec_id.h:422
mpegaudioenc_template.c
MPA_encode_frame
static int MPA_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: mpegaudioenc_template.c:742
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
MPA_encode_init
static av_cold int MPA_encode_init(AVCodecContext *avctx)
Definition: mpegaudioenc_template.c:77
MpegAudioContext
Definition: mpegaudioenc_template.c:48
channel_layout.h