mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
242 lines
7.2 KiB
242 lines
7.2 KiB
/* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg 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. |
|
* |
|
* FFmpeg 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 FFmpeg; 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/buffer.h" |
|
#include "libavutil/mathematics.h" |
|
#include "libavutil/pixfmt.h" |
|
#include "avcodec.h" |
|
#include "config.h" |
|
|
|
#define FF_SANE_NB_CHANNELS 63U |
|
|
|
typedef struct FramePool { |
|
/** |
|
* Pools for each data plane. For audio all the planes have the same size, |
|
* so only pools[0] is used. |
|
*/ |
|
AVBufferPool *pools[4]; |
|
|
|
/* |
|
* Pool parameters |
|
*/ |
|
int format; |
|
int width, height; |
|
int stride_align[AV_NUM_DATA_POINTERS]; |
|
int linesize[4]; |
|
int planes; |
|
int channels; |
|
int samples; |
|
} FramePool; |
|
|
|
typedef struct AVCodecInternal { |
|
/** |
|
* 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; |
|
|
|
/** |
|
* Whether to allocate progress for frame threading. |
|
* |
|
* The codec must set it to 1 if it uses ff_thread_await/report_progress(), |
|
* then progress will be allocated in ff_thread_get_buffer(). The frames |
|
* then MUST be freed with ff_thread_release_buffer(). |
|
* |
|
* If the codec does not need to call the progress functions (there are no |
|
* dependencies between the frames), it should leave this at 0. Then it can |
|
* decode straight to the user-provided frames (which the user will then |
|
* free with av_frame_unref()), there is no need to call |
|
* ff_thread_release_buffer(). |
|
*/ |
|
int allocate_progress; |
|
|
|
#if FF_API_OLD_ENCODE_AUDIO |
|
/** |
|
* Internal sample count used by avcodec_encode_audio() to fabricate pts. |
|
* Can be removed along with avcodec_encode_audio(). |
|
*/ |
|
int64_t 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; |
|
|
|
AVFrame to_free; |
|
|
|
FramePool *pool; |
|
|
|
void *thread_ctx; |
|
|
|
/** |
|
* Current packet as passed into the decoder, to avoid having to pass the |
|
* packet into every function. |
|
*/ |
|
AVPacket *pkt; |
|
|
|
/** |
|
* temporary buffer used for encoders to store their bitstream |
|
*/ |
|
uint8_t *byte_buffer; |
|
unsigned int byte_buffer_size; |
|
|
|
void *frame_thread_encoder; |
|
|
|
/** |
|
* Number of audio samples to skip at the start of the next decoded frame |
|
*/ |
|
int skip_samples; |
|
} AVCodecInternal; |
|
|
|
struct AVCodecDefault { |
|
const uint8_t *key; |
|
const uint8_t *value; |
|
}; |
|
|
|
/** |
|
* 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 AVPixelFormat 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); |
|
|
|
/** |
|
* does needed setup of pkt_pts/pos and such for (re)get_buffer(); |
|
*/ |
|
int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame); |
|
|
|
|
|
void avpriv_color_frame(AVFrame *frame, const int color[4]); |
|
|
|
extern volatile int ff_avcodec_locked; |
|
int ff_lock_avcodec(AVCodecContext *log_ctx); |
|
int ff_unlock_avcodec(void); |
|
|
|
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 avctx the AVCodecContext of the encoder |
|
* @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_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size); |
|
|
|
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) |
|
{ |
|
if(samples == AV_NOPTS_VALUE) |
|
return AV_NOPTS_VALUE; |
|
return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate }, |
|
avctx->time_base); |
|
} |
|
|
|
/** |
|
* Get a buffer for a frame. This is a wrapper around |
|
* AVCodecContext.get_buffer() and should be used instead calling get_buffer() |
|
* directly. |
|
*/ |
|
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags); |
|
|
|
/** |
|
* Identical in function to av_frame_make_writable(), except it uses |
|
* ff_get_buffer() to allocate the buffer when needed. |
|
*/ |
|
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame); |
|
|
|
int ff_thread_can_start_frame(AVCodecContext *avctx); |
|
|
|
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx); |
|
|
|
/** |
|
* Call avcodec_open2 recursively by decrementing counter, unlocking mutex, |
|
* calling the function and then restoring again. Assumes the mutex is |
|
* already locked |
|
*/ |
|
int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); |
|
|
|
/** |
|
* Call avcodec_close recursively, counterpart to avcodec_open2_recursive. |
|
*/ |
|
int ff_codec_close_recursive(AVCodecContext *avctx); |
|
|
|
/** |
|
* Finalize buf into extradata and set its size appropriately. |
|
*/ |
|
int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf); |
|
|
|
const uint8_t *avpriv_find_start_code(const uint8_t *p, |
|
const uint8_t *end, |
|
uint32_t *state); |
|
|
|
/** |
|
* Check that the provided frame dimensions are valid and set them on the codec |
|
* context. |
|
*/ |
|
int ff_set_dimensions(AVCodecContext *s, int width, int height); |
|
|
|
#endif /* AVCODEC_INTERNAL_H */
|
|
|