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87a051f976
The generic code in utils.c sets the AVFrame.pkt_dts field from the packet it was supposedly decoded. This does not have to be true for a fully asynchronous decoder like mmaldec. It could be overwritten with an incorrect value. Even if the decoder doesn't determine the DTS (but sets it to AV_NOPTS_VALUE), it's impossible to determine a correct value in utils.c. Decoders can now be marked with FF_CODEC_CAP_SETS_PKT_DTS, in which case utils.c won't overwrite the field. The decoders are expected to set this field (even if they only set it to AV_NOPTS_VALUE). Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
244 lines
7.4 KiB
C
244 lines
7.4 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* common internal api header.
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*/
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#ifndef AVCODEC_INTERNAL_H
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#define AVCODEC_INTERNAL_H
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#include <stdint.h>
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#include "libavutil/buffer.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/pixfmt.h"
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#include "avcodec.h"
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#include "config.h"
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/**
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* The codec does not modify any global variables in the init function,
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* allowing to call the init function without locking any global mutexes.
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*/
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#define FF_CODEC_CAP_INIT_THREADSAFE (1 << 0)
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/**
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* The codec allows calling the close function for deallocation even if
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* the init function returned a failure. Without this capability flag, a
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* codec does such cleanup internally when returning failures from the
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* init function and does not expect the close function to be called at
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* all.
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*/
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#define FF_CODEC_CAP_INIT_CLEANUP (1 << 1)
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/**
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* Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set
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* AVFrame.pkt_dts manually. If the flag is set, utils.c won't overwrite
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* this field. If it's unset, utils.c tries to guess the pkt_dts field
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* from the input AVPacket.
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*/
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#define FF_CODEC_CAP_SETS_PKT_DTS (1 << 2)
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#ifdef DEBUG
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# define ff_dlog(ctx, ...) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__)
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#else
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# define ff_dlog(ctx, ...) while(0)
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#endif
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#ifdef TRACE
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# define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__)
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#else
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# define ff_tlog(ctx, ...) while(0)
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#endif
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#if !FF_API_QUANT_BIAS
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#define FF_DEFAULT_QUANT_BIAS 999999
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#endif
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#define FF_SANE_NB_CHANNELS 63U
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#define FF_SIGNBIT(x) (x >> CHAR_BIT * sizeof(x) - 1)
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typedef struct FramePool {
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/**
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* Pools for each data plane. For audio all the planes have the same size,
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* so only pools[0] is used.
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*/
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AVBufferPool *pools[4];
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/*
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* Pool parameters
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*/
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int format;
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int width, height;
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int stride_align[AV_NUM_DATA_POINTERS];
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int linesize[4];
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int planes;
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int channels;
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int samples;
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} FramePool;
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typedef struct AVCodecInternal {
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/**
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* Whether the parent AVCodecContext is a copy of the context which had
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* init() called on it.
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* This is used by multithreading - shared tables and picture pointers
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* should be freed from the original context only.
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*/
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int is_copy;
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/**
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* Whether to allocate progress for frame threading.
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*
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* The codec must set it to 1 if it uses ff_thread_await/report_progress(),
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* then progress will be allocated in ff_thread_get_buffer(). The frames
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* then MUST be freed with ff_thread_release_buffer().
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*
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* If the codec does not need to call the progress functions (there are no
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* dependencies between the frames), it should leave this at 0. Then it can
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* decode straight to the user-provided frames (which the user will then
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* free with av_frame_unref()), there is no need to call
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* ff_thread_release_buffer().
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*/
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int allocate_progress;
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/**
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* An audio frame with less than required samples has been submitted and
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* padded with silence. Reject all subsequent frames.
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*/
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int last_audio_frame;
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AVFrame *to_free;
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FramePool *pool;
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void *thread_ctx;
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/**
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* Current packet as passed into the decoder, to avoid having to pass the
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* packet into every function.
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*/
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AVPacket *pkt;
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/**
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* hwaccel-specific private data
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*/
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void *hwaccel_priv_data;
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} AVCodecInternal;
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struct AVCodecDefault {
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const uint8_t *key;
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const uint8_t *value;
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};
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/**
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* Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
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* If there is no such matching pair then size is returned.
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*/
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int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
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unsigned int avpriv_toupper4(unsigned int x);
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int avpriv_lock_avformat(void);
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int avpriv_unlock_avformat(void);
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/**
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* Maximum size in bytes of extradata.
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* This value was chosen such that every bit of the buffer is
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* addressable by a 32-bit signed integer as used by get_bits.
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*/
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#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - AV_INPUT_BUFFER_PADDING_SIZE)
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/**
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* Check AVPacket size and/or allocate data.
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*
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* Encoders supporting AVCodec.encode2() can use this as a convenience to
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* ensure the output packet data is large enough, whether provided by the user
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* or allocated in this function.
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*
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* @param avpkt the AVPacket
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* If avpkt->data is already set, avpkt->size is checked
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* to ensure it is large enough.
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* If avpkt->data is NULL, a new buffer is allocated.
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* avpkt->size is set to the specified size.
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* All other AVPacket fields will be reset with av_init_packet().
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* @param size the minimum required packet size
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* @return 0 on success, negative error code on failure
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*/
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int ff_alloc_packet(AVPacket *avpkt, int size);
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/**
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* Rescale from sample rate to AVCodecContext.time_base.
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*/
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static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
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int64_t samples)
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{
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return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
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avctx->time_base);
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}
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/**
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* Get a buffer for a frame. This is a wrapper around
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* AVCodecContext.get_buffer() and should be used instead calling get_buffer()
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* directly.
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*/
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int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags);
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/**
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* Identical in function to av_frame_make_writable(), except it uses
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* ff_get_buffer() to allocate the buffer when needed.
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*/
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int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame);
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const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
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const uint8_t *end,
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uint32_t *restrict state);
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/**
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* Check that the provided frame dimensions are valid and set them on the codec
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* context.
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*/
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int ff_set_dimensions(AVCodecContext *s, int width, int height);
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/**
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* Check that the provided sample aspect ratio is valid and set it on the codec
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* context.
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*/
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int ff_set_sar(AVCodecContext *avctx, AVRational sar);
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/**
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* Add or update AV_FRAME_DATA_MATRIXENCODING side data.
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*/
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int ff_side_data_update_matrix_encoding(AVFrame *frame,
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enum AVMatrixEncoding matrix_encoding);
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/**
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* Select the (possibly hardware accelerated) pixel format.
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* This is a wrapper around AVCodecContext.get_format() and should be used
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* instead of calling get_format() directly.
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*/
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int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);
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/**
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* Set various frame properties from the codec context / packet data.
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*/
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int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);
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#endif /* AVCODEC_INTERNAL_H */
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