yading@10: /*
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * common internal api header.
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_INTERNAL_H
yading@10: #define AVCODEC_INTERNAL_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: 
yading@10: #include "libavutil/buffer.h"
yading@10: #include "libavutil/mathematics.h"
yading@10: #include "libavutil/pixfmt.h"
yading@10: #include "avcodec.h"
yading@10: #include "config.h"
yading@10: 
yading@10: #define FF_SANE_NB_CHANNELS 63U
yading@10: 
yading@10: typedef struct FramePool {
yading@10:     /**
yading@10:      * Pools for each data plane. For audio all the planes have the same size,
yading@10:      * so only pools[0] is used.
yading@10:      */
yading@10:     AVBufferPool *pools[4];
yading@10: 
yading@10:     /*
yading@10:      * Pool parameters
yading@10:      */
yading@10:     int format;
yading@10:     int width, height;
yading@10:     int stride_align[AV_NUM_DATA_POINTERS];
yading@10:     int linesize[4];
yading@10:     int planes;
yading@10:     int channels;
yading@10:     int samples;
yading@10: } FramePool;
yading@10: 
yading@10: typedef struct AVCodecInternal {
yading@10:     /**
yading@10:      * Whether the parent AVCodecContext is a copy of the context which had
yading@10:      * init() called on it.
yading@10:      * This is used by multithreading - shared tables and picture pointers
yading@10:      * should be freed from the original context only.
yading@10:      */
yading@10:     int is_copy;
yading@10: 
yading@10:     /**
yading@10:      * Whether to allocate progress for frame threading.
yading@10:      *
yading@10:      * The codec must set it to 1 if it uses ff_thread_await/report_progress(),
yading@10:      * then progress will be allocated in ff_thread_get_buffer(). The frames
yading@10:      * then MUST be freed with ff_thread_release_buffer().
yading@10:      *
yading@10:      * If the codec does not need to call the progress functions (there are no
yading@10:      * dependencies between the frames), it should leave this at 0. Then it can
yading@10:      * decode straight to the user-provided frames (which the user will then
yading@10:      * free with av_frame_unref()), there is no need to call
yading@10:      * ff_thread_release_buffer().
yading@10:      */
yading@10:     int allocate_progress;
yading@10: 
yading@10: #if FF_API_OLD_ENCODE_AUDIO
yading@10:     /**
yading@10:      * Internal sample count used by avcodec_encode_audio() to fabricate pts.
yading@10:      * Can be removed along with avcodec_encode_audio().
yading@10:      */
yading@10:     int sample_count;
yading@10: #endif
yading@10: 
yading@10:     /**
yading@10:      * An audio frame with less than required samples has been submitted and
yading@10:      * padded with silence. Reject all subsequent frames.
yading@10:      */
yading@10:     int last_audio_frame;
yading@10: 
yading@10:     AVFrame to_free;
yading@10: 
yading@10:     FramePool *pool;
yading@10: 
yading@10:     /**
yading@10:      * temporary buffer used for encoders to store their bitstream
yading@10:      */
yading@10:     uint8_t *byte_buffer;
yading@10:     unsigned int byte_buffer_size;
yading@10: 
yading@10:     void *frame_thread_encoder;
yading@10: 
yading@10:     /**
yading@10:      * Number of audio samples to skip at the start of the next decoded frame
yading@10:      */
yading@10:     int skip_samples;
yading@10: } AVCodecInternal;
yading@10: 
yading@10: struct AVCodecDefault {
yading@10:     const uint8_t *key;
yading@10:     const uint8_t *value;
yading@10: };
yading@10: 
yading@10: /**
yading@10:  * Return the hardware accelerated codec for codec codec_id and
yading@10:  * pixel format pix_fmt.
yading@10:  *
yading@10:  * @param codec_id the codec to match
yading@10:  * @param pix_fmt the pixel format to match
yading@10:  * @return the hardware accelerated codec, or NULL if none was found.
yading@10:  */
yading@10: AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt);
yading@10: 
yading@10: /**
yading@10:  * Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
yading@10:  * If there is no such matching pair then size is returned.
yading@10:  */
yading@10: int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
yading@10: 
yading@10: unsigned int avpriv_toupper4(unsigned int x);
yading@10: 
yading@10: /**
yading@10:  * does needed setup of pkt_pts/pos and such for (re)get_buffer();
yading@10:  */
yading@10: int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame);
yading@10: 
yading@10: 
yading@10: void avpriv_color_frame(AVFrame *frame, const int color[4]);
yading@10: 
yading@10: /**
yading@10:  * Remove and free all side data from packet.
yading@10:  */
yading@10: void ff_packet_free_side_data(AVPacket *pkt);
yading@10: 
yading@10: extern volatile int ff_avcodec_locked;
yading@10: int ff_lock_avcodec(AVCodecContext *log_ctx);
yading@10: int ff_unlock_avcodec(void);
yading@10: 
yading@10: int avpriv_lock_avformat(void);
yading@10: int avpriv_unlock_avformat(void);
yading@10: 
yading@10: /**
yading@10:  * Maximum size in bytes of extradata.
yading@10:  * This value was chosen such that every bit of the buffer is
yading@10:  * addressable by a 32-bit signed integer as used by get_bits.
yading@10:  */
yading@10: #define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
yading@10: 
yading@10: /**
yading@10:  * Check AVPacket size and/or allocate data.
yading@10:  *
yading@10:  * Encoders supporting AVCodec.encode2() can use this as a convenience to
yading@10:  * ensure the output packet data is large enough, whether provided by the user
yading@10:  * or allocated in this function.
yading@10:  *
yading@10:  * @param avctx   the AVCodecContext of the encoder
yading@10:  * @param avpkt   the AVPacket
yading@10:  *                If avpkt->data is already set, avpkt->size is checked
yading@10:  *                to ensure it is large enough.
yading@10:  *                If avpkt->data is NULL, a new buffer is allocated.
yading@10:  *                avpkt->size is set to the specified size.
yading@10:  *                All other AVPacket fields will be reset with av_init_packet().
yading@10:  * @param size    the minimum required packet size
yading@10:  * @return        0 on success, negative error code on failure
yading@10:  */
yading@10: int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int size);
yading@10: 
yading@10: int ff_alloc_packet(AVPacket *avpkt, int size);
yading@10: 
yading@10: /**
yading@10:  * Rescale from sample rate to AVCodecContext.time_base.
yading@10:  */
yading@10: static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
yading@10:                                                         int64_t samples)
yading@10: {
yading@10:     if(samples == AV_NOPTS_VALUE)
yading@10:         return AV_NOPTS_VALUE;
yading@10:     return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
yading@10:                         avctx->time_base);
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Get a buffer for a frame. This is a wrapper around
yading@10:  * AVCodecContext.get_buffer() and should be used instead calling get_buffer()
yading@10:  * directly.
yading@10:  */
yading@10: int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags);
yading@10: 
yading@10: /**
yading@10:  * Identical in function to av_frame_make_writable(), except it uses
yading@10:  * ff_get_buffer() to allocate the buffer when needed.
yading@10:  */
yading@10: int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame);
yading@10: 
yading@10: int ff_thread_can_start_frame(AVCodecContext *avctx);
yading@10: 
yading@10: int ff_get_logical_cpus(AVCodecContext *avctx);
yading@10: 
yading@10: int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx);
yading@10: 
yading@10: /**
yading@10:  * Call avcodec_open2 recursively by decrementing counter, unlocking mutex,
yading@10:  * calling the function and then restoring again. Assumes the mutex is
yading@10:  * already locked
yading@10:  */
yading@10: int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
yading@10: 
yading@10: /**
yading@10:  * Call avcodec_close recursively, counterpart to avcodec_open2_recursive.
yading@10:  */
yading@10: int ff_codec_close_recursive(AVCodecContext *avctx);
yading@10: 
yading@10: /**
yading@10:  * Finalize buf into extradata and set its size appropriately.
yading@10:  */
yading@10: int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf);
yading@10: 
yading@10: const uint8_t *avpriv_find_start_code(const uint8_t *p,
yading@10:                                       const uint8_t *end,
yading@10:                                       uint32_t *state);
yading@10: 
yading@10: #endif /* AVCODEC_INTERNAL_H */