| /* |
| * 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/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; |
| |
| /** |
| * temporary buffer used for encoders to store their bitstream |
| */ |
| uint8_t *byte_buffer; |
| unsigned int byte_buffer_size; |
| } 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); |
| |
| /** |
| * does needed setup of pkt_pts/pos and such for (re)get_buffer(); |
| */ |
| void ff_init_buffer_info(AVCodecContext *s, AVFrame *pic); |
| |
| /** |
| * Remove and free all side data from packet. |
| */ |
| void ff_packet_free_side_data(AVPacket *pkt); |
| |
| 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, int 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); |
| } |
| |
| int ff_thread_can_start_frame(AVCodecContext *avctx); |
| |
| #endif /* AVCODEC_INTERNAL_H */ |