mirror of https://git.ffmpeg.org/ffmpeg.git
148 lines
4.4 KiB
C
148 lines
4.4 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* common internal api header.
|
|
*/
|
|
|
|
#ifndef AVCODEC_INTERNAL_H
|
|
#define AVCODEC_INTERNAL_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/mathematics.h"
|
|
#include "libavutil/pixfmt.h"
|
|
#include "avcodec.h"
|
|
|
|
typedef struct InternalBuffer {
|
|
uint8_t *base[AV_NUM_DATA_POINTERS];
|
|
uint8_t *data[AV_NUM_DATA_POINTERS];
|
|
int linesize[AV_NUM_DATA_POINTERS];
|
|
int width;
|
|
int height;
|
|
enum PixelFormat pix_fmt;
|
|
uint8_t **extended_data;
|
|
int audio_data_size;
|
|
int nb_channels;
|
|
} InternalBuffer;
|
|
|
|
typedef struct AVCodecInternal {
|
|
/**
|
|
* internal buffer count
|
|
* used by default get/release/reget_buffer().
|
|
*/
|
|
int buffer_count;
|
|
|
|
/**
|
|
* internal buffers
|
|
* used by default get/release/reget_buffer().
|
|
*/
|
|
InternalBuffer *buffer;
|
|
|
|
/**
|
|
* Whether the parent AVCodecContext is a copy of the context which had
|
|
* init() called on it.
|
|
* This is used by multithreading - shared tables and picture pointers
|
|
* should be freed from the original context only.
|
|
*/
|
|
int is_copy;
|
|
|
|
#if FF_API_OLD_DECODE_AUDIO
|
|
/**
|
|
* Internal sample count used by avcodec_encode_audio() to fabricate pts.
|
|
* Can be removed along with avcodec_encode_audio().
|
|
*/
|
|
int sample_count;
|
|
#endif
|
|
|
|
/**
|
|
* An audio frame with less than required samples has been submitted and
|
|
* padded with silence. Reject all subsequent frames.
|
|
*/
|
|
int last_audio_frame;
|
|
} AVCodecInternal;
|
|
|
|
struct AVCodecDefault {
|
|
const uint8_t *key;
|
|
const uint8_t *value;
|
|
};
|
|
|
|
/**
|
|
* Determine whether pix_fmt is a hardware accelerated format.
|
|
*/
|
|
int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt);
|
|
|
|
/**
|
|
* Return the hardware accelerated codec for codec codec_id and
|
|
* pixel format pix_fmt.
|
|
*
|
|
* @param codec_id the codec to match
|
|
* @param pix_fmt the pixel format to match
|
|
* @return the hardware accelerated codec, or NULL if none was found.
|
|
*/
|
|
AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum PixelFormat pix_fmt);
|
|
|
|
/**
|
|
* Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
|
|
* If there is no such matching pair then size is returned.
|
|
*/
|
|
int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
|
|
|
|
unsigned int avpriv_toupper4(unsigned int x);
|
|
|
|
int avpriv_lock_avformat(void);
|
|
int avpriv_unlock_avformat(void);
|
|
|
|
/**
|
|
* Maximum size in bytes of extradata.
|
|
* This value was chosen such that every bit of the buffer is
|
|
* addressable by a 32-bit signed integer as used by get_bits.
|
|
*/
|
|
#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
|
|
|
|
/**
|
|
* Check AVPacket size and/or allocate data.
|
|
*
|
|
* Encoders supporting AVCodec.encode2() can use this as a convenience to
|
|
* ensure the output packet data is large enough, whether provided by the user
|
|
* or allocated in this function.
|
|
*
|
|
* @param avpkt the AVPacket
|
|
* If avpkt->data is already set, avpkt->size is checked
|
|
* to ensure it is large enough.
|
|
* If avpkt->data is NULL, a new buffer is allocated.
|
|
* avpkt->size is set to the specified size.
|
|
* All other AVPacket fields will be reset with av_init_packet().
|
|
* @param size the minimum required packet size
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
int ff_alloc_packet(AVPacket *avpkt, int size);
|
|
|
|
/**
|
|
* Rescale from sample rate to AVCodecContext.time_base.
|
|
*/
|
|
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
|
|
int64_t samples)
|
|
{
|
|
return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
|
|
avctx->time_base);
|
|
}
|
|
|
|
#endif /* AVCODEC_INTERNAL_H */
|