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Diffstat (limited to 'media/ffvpx/libavcodec/internal.h')
| -rw-r--r-- | media/ffvpx/libavcodec/internal.h | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/internal.h b/media/ffvpx/libavcodec/internal.h new file mode 100644 index 000000000..000fe263c --- /dev/null +++ b/media/ffvpx/libavcodec/internal.h @@ -0,0 +1,363 @@ +/* + * 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/channel_layout.h" +#include "libavutil/mathematics.h" +#include "libavutil/pixfmt.h" +#include "avcodec.h" +#include "config.h" + +/** + * The codec does not modify any global variables in the init function, + * allowing to call the init function without locking any global mutexes. + */ +#define FF_CODEC_CAP_INIT_THREADSAFE (1 << 0) +/** + * The codec allows calling the close function for deallocation even if + * the init function returned a failure. Without this capability flag, a + * codec does such cleanup internally when returning failures from the + * init function and does not expect the close function to be called at + * all. + */ +#define FF_CODEC_CAP_INIT_CLEANUP (1 << 1) +/** + * Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set + * AVFrame.pkt_dts manually. If the flag is set, utils.c won't overwrite + * this field. If it's unset, utils.c tries to guess the pkt_dts field + * from the input AVPacket. + */ +#define FF_CODEC_CAP_SETS_PKT_DTS (1 << 2) +/** + * The decoder extracts and fills its parameters even if the frame is + * skipped due to the skip_frame setting. + */ +#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM (1 << 3) + +#ifdef TRACE +# define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__) +#else +# define ff_tlog(ctx, ...) do { } while(0) +#endif + + +#if !FF_API_QUANT_BIAS +#define FF_DEFAULT_QUANT_BIAS 999999 +#endif + +#define FF_SANE_NB_CHANNELS 64U + +#define FF_SIGNBIT(x) ((x) >> CHAR_BIT * sizeof(x) - 1) + +#if HAVE_AVX +# define STRIDE_ALIGN 32 +#elif HAVE_SIMD_ALIGN_16 +# define STRIDE_ALIGN 16 +#else +# define STRIDE_ALIGN 8 +#endif + +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; + + /** + * 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; + + /** + * hwaccel-specific private data + */ + void *hwaccel_priv_data; + + /** + * checks API usage: after codec draining, flush is required to resume operation + */ + int draining; + + /** + * buffers for using new encode/decode API through legacy API + */ + AVPacket *buffer_pkt; + int buffer_pkt_valid; // encoding: packet without data can be valid + AVFrame *buffer_frame; + int draining_done; +} AVCodecInternal; + +struct AVCodecDefault { + const uint8_t *key; + const uint8_t *value; +}; + +extern const uint8_t ff_log2_run[41]; + +/** + * 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 ff_color_frame(AVFrame *frame, const int color[4]); + +extern volatile int ff_avcodec_locked; +int ff_lock_avcodec(AVCodecContext *log_ctx, const AVCodec *codec); +int ff_unlock_avcodec(const AVCodec *codec); + +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) - AV_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 + * @param min_size This is a hint to the allocation algorithm, which indicates + * to what minimal size the caller might later shrink the packet + * to. Encoders often allocate packets which are larger than the + * amount of data that is written into them as the exact amount is + * not known at the time of allocation. min_size represents the + * size a packet might be shrunk to by the caller. Can be set to + * 0. setting this roughly correctly allows the allocation code + * to choose between several allocation strategies to improve + * speed slightly. + * @return non negative on success, negative error code on failure + */ +int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size); + +attribute_deprecated 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); +} + +/** + * 2^(x) for integer x + * @return correctly rounded float + */ +static av_always_inline float ff_exp2fi(int x) { + /* Normal range */ + if (-126 <= x && x <= 128) + return av_int2float(x+127 << 23); + /* Too large */ + else if (x > 128) + return INFINITY; + /* Subnormal numbers */ + else if (x > -150) + return av_int2float(1 << (x+149)); + /* Negligibly small */ + else + return 0; +} + +/** + * 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); + +/** + * 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); + +int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec); + +/** + * 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); + +/** + * Check that the provided sample aspect ratio is valid and set it on the codec + * context. + */ +int ff_set_sar(AVCodecContext *avctx, AVRational sar); + +/** + * Add or update AV_FRAME_DATA_MATRIXENCODING side data. + */ +int ff_side_data_update_matrix_encoding(AVFrame *frame, + enum AVMatrixEncoding matrix_encoding); + +/** + * Select the (possibly hardware accelerated) pixel format. + * This is a wrapper around AVCodecContext.get_format() and should be used + * instead of calling get_format() directly. + */ +int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); + +/** + * Set various frame properties from the codec context / packet data. + */ +int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame); + +/** + * Add a CPB properties side data to an encoding context. + */ +AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx); + +int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type); + +/** + * Check AVFrame for A53 side data and allocate and fill SEI message with A53 info + * + * @param frame Raw frame to get A53 side data from + * @param prefix_len Number of bytes to allocate before SEI message + * @param data Pointer to a variable to store allocated memory + * Upon return the variable will hold NULL on error or if frame has no A53 info. + * Otherwise it will point to prefix_len uninitialized bytes followed by + * *sei_size SEI message + * @param sei_size Pointer to a variable to store generated SEI message length + * @return Zero on success, negative error code on failure + */ +int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len, + void **data, size_t *sei_size); + +#endif /* AVCODEC_INTERNAL_H */ |