internal.h
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * Libav is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
24 #ifndef AVCODEC_INTERNAL_H
25 #define AVCODEC_INTERNAL_H
26 
27 #include <stdint.h>
28 
29 #include "libavutil/mathematics.h"
30 #include "libavutil/pixfmt.h"
31 #include "avcodec.h"
32 
33 #define FF_SANE_NB_CHANNELS 128U
34 
35 typedef struct InternalBuffer {
39  int width;
40  int height;
43 
44 typedef struct AVCodecInternal {
50 
56 
63  int is_copy;
64 
65 #if FF_API_OLD_DECODE_AUDIO
66 
70  int sample_count;
71 #endif
72 
78 
85 
87  const uint8_t *key;
88  const uint8_t *value;
89 };
90 
100 
105 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
106 
107 unsigned int avpriv_toupper4(unsigned int x);
108 
109 int avpriv_lock_avformat(void);
110 int avpriv_unlock_avformat(void);
111 
117 #define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
118 
135 int ff_alloc_packet(AVPacket *avpkt, int size);
136 
141  int64_t samples)
142 {
143  return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
144  avctx->time_base);
145 }
146 
152 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame);
153 
154 #endif /* AVCODEC_INTERNAL_H */
static int16_t * samples
int size
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
int avpriv_unlock_avformat(void)
Definition: utils.c:2088
enum AVPixelFormat pix_fmt
Definition: internal.h:41
int buffer_count
internal buffer count used by default get/release/reget_buffer().
Definition: internal.h:49
InternalBuffer * buffer
internal buffers used by default get/release/reget_buffer().
Definition: internal.h:55
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1465
uint8_t
uint8_t * base[AV_NUM_DATA_POINTERS]
Definition: internal.h:36
#define b
Definition: input.c:52
struct InternalBuffer InternalBuffer
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:122
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:95
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:63
enum AVCodecID codec_id
Definition: mov_chan.c:432
int avpriv_lock_avformat(void)
Definition: utils.c:2079
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Get a buffer for a frame.
Definition: utils.c:464
int ff_alloc_packet(AVPacket *avpkt, int size)
Check AVPacket size and/or allocate data.
Definition: utils.c:880
enum AVPixelFormat pix_fmt
Definition: movenc.c:801
uint8_t * audio_data
The data for the last allocated audio frame.
Definition: internal.h:83
external API header
AVHWAccel.
Definition: avcodec.h:3055
int sample_rate
samples per second
Definition: avcodec.h:2104
uint8_t * data[AV_NUM_DATA_POINTERS]
Definition: internal.h:37
main external API structure.
Definition: avcodec.h:1339
struct AVCodecInternal AVCodecInternal
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:2097
rational number numerator/denominator
Definition: rational.h:43
AVHWAccel * ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
Return the hardware accelerated codec for codec codec_id and pixel format pix_fmt.
Definition: utils.c:2048
const uint8_t * key
Definition: internal.h:87
const uint8_t * value
Definition: internal.h:88
pixel format definitions
static const struct twinvq_data tab
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx, int64_t samples)
Rescale from sample rate to AVCodecContext.time_base.
Definition: internal.h:140
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:898
int linesize[AV_NUM_DATA_POINTERS]
Definition: internal.h:38
int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
Definition: utils.c:2000
int last_audio_frame
An audio frame with less than required samples has been submitted and padded with silence...
Definition: internal.h:77