/* * 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 CodecID 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 */