FFmpeg: libavcodec/libcodec2.c Source File
Go to the documentation of this file. 1 /*
2 * codec2 encoder/decoder using libcodec2
3 * Copyright (c) 2017 Tomas Härdin
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 #include <codec2/codec2.h>
31
37
39 //not AV_OPT_FLAG_DECODING_PARAM since mode should come from the demuxer
40 //1300 (aka FreeDV 1600) is the most common mode on-the-air, default to it here as well
43 };
44
50 };
51
53 {
55 //Grab mode name from options, unless it's some weird number.
57
58 c2->codec = codec2_create(
mode);
60 //Out of memory or unsupported mode. The latter seems most likely,
61 //but we can't tell for sure with the current API.
62 goto libcodec2_init_common_error;
63 }
64
66 avctx->
block_align = (codec2_bits_per_frame(
c2->codec) + 7) / 8;
67
69 //codec2_create() may succeed for some modes but still fail at codec2_samples_per_frame()
70 //example is -mode 700C on libcodec2 0.4
71 codec2_destroy(
c2->codec);
73 goto libcodec2_init_common_error;
74 }
75
76 codec2_set_natural_or_gray(
c2->codec, 1);
77
78 return 0;
79
80 libcodec2_init_common_error:
82 "Mode %i (%s) not supported with the linked version of libcodec2\n",
85 }
86
88 {
93
98 }
99
101 }
102
104 {
106
107 //will need to be smarter once we get wideband support
112 }
113
117 }
118
121
123 }
124
126 {
128
129 codec2_destroy(
c2->codec);
130 return 0;
131 }
132
135 {
138 const uint8_t *
input;
140
143
147 }
148
151
152 for (
i = 0;
i < nframes;
i++) {
156 }
157
158 *got_frame_ptr = nframes > 0;
160 }
161
164 {
167
171 }
172
174 *got_packet_ptr = 1;
175
176 return 0;
177 }
178
180 .
p.
name =
"libcodec2",
193 };
194
196 .
p.
name =
"libcodec2",
211 };
#define CODEC2_EXTRADATA_SIZE
int frame_size
Number of samples per channel in an audio frame.
static int libcodec2_encode(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Filter the word "frame" indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
int sample_rate
samples per second
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
This structure describes decoded (raw) audio or video data.
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
static av_cold void close(AVCodecParserContext *s)
AVCodec p
The public AVCodec.
AVChannelLayout ch_layout
Audio channel layout.
#define FF_CODEC_ENCODE_CB(func)
#define AV_OPT_FLAG_AUDIO_PARAM
static av_cold int libcodec2_init_decoder(AVCodecContext *avctx)
static const AVOption options[]
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static void codec2_make_extradata(uint8_t *ptr, int mode)
#define FF_CODEC_DECODE_CB(func)
#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
This encoder can reorder user opaque values from input AVFrames and return them with corresponding ou...
static av_cold int libcodec2_init_common(AVCodecContext *avctx, int mode)
#define CODEC_LONG_NAME(str)
#define CODEC_CH_LAYOUTS(...)
#define LIBAVUTIL_VERSION_INT
Describe the class of an AVClass context structure.
const char * av_default_item_name(void *ptr)
Return the context name.
static av_cold int libcodec2_close(AVCodecContext *avctx)
static const AVClass libcodec2_enc_class
#define AV_OPT_FLAG_ENCODING_PARAM
A generic parameter which can be set by the user for muxing or encoding.
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
int(* init)(AVBSFContext *ctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
const FFCodec ff_libcodec2_encoder
An AVChannelLayout holds information about the channel layout of audio data.
enum AVSampleFormat sample_fmt
audio sample format
const FFCodec ff_libcodec2_decoder
static uint8_t codec2_mode_from_extradata(uint8_t *ptr)
#define CODEC_SAMPLEFMTS(...)
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
#define i(width, name, range_min, range_max)
uint8_t * extradata
Out-of-band global headers that may be used by some codecs.
#define CODEC2_AVOPTIONS(desc, classname, min_val, default_val, option_flags)
@ AV_SAMPLE_FMT_S16
signed 16 bits
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
const char * name
Name of the codec implementation.
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define AV_INPUT_BUFFER_PADDING_SIZE
static av_cold int libcodec2_init_encoder(AVCodecContext *avctx)
main external API structure.
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
Filter the word "frame" indicates either a video frame or a group of audio samples
#define AV_CHANNEL_LAYOUT_MONO
This structure stores compressed data.
static int libcodec2_decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *pkt)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define CODEC_SAMPLERATES(...)
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