decode.h File Reference

#include "libavutil/buffer.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "avcodec.h"

Go to the source code of this file.

Data Structures
struct	FrameDecodeData
	This struct stores per-frame lavc-internal data and is attached to it via private_ref. More...

Functions
int	ff_decode_get_packet (AVCodecContext *avctx, AVPacket *pkt)
	Called by decoders to get the next packet for decoding. More...
int	ff_decode_frame_props (AVCodecContext *avctx, AVFrame *frame)
	Set various frame properties from the codec context / packet data. More...
int	ff_decode_get_hw_frames_ctx (AVCodecContext *avctx, enum AVHWDeviceType dev_type)
	Make sure avctx.hw_frames_ctx is set. More...
int	ff_attach_decode_data (AVFrame *frame)
int	ff_copy_palette (void *dst, const AVPacket *src, void *logctx)
	Check whether the side-data of src contains a palette of size AVPALETTE_SIZE; if so, copy it to dst and return 1; else return 0. More...
int	ff_decode_preinit (AVCodecContext *avctx)
	Perform decoder initialization and validation. More...

Function Documentation

ff_decode_get_packet()

int ff_decode_get_packet	(	AVCodecContext *	avctx,
		AVPacket *	pkt
	)

Called by decoders to get the next packet for decoding.

Parameters

pkt	An empty packet to be filled with data.

Returns

0 if a new reference has been successfully written to pkt AVERROR(EAGAIN) if no data is currently available AVERROR_EOF if and end of stream has been reached, so no more data will be available

Definition at line 224 of file decode.c.

Referenced by binkaudio_receive_frame(), crystalhd_receive_frame(), cuvid_output_frame(), decode_simple_internal(), ffmmal_receive_frame(), libdav1d_receive_frame(), mediacodec_receive_frame(), mjpeg_get_packet(), and v4l2_receive_frame().

ff_decode_frame_props()

int ff_decode_frame_props	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

Set various frame properties from the codec context / packet data.

Definition at line 1489 of file decode.c.

Referenced by cuvid_output_frame(), ff_get_buffer(), ffmal_copy_frame(), libdav1d_receive_frame(), qsv_get_continuous_buffer(), qtrle_decode_frame(), raw_decode(), reget_buffer_internal(), vpx_decode(), and wrapped_avframe_decode().

ff_decode_get_hw_frames_ctx()

int ff_decode_get_hw_frames_ctx	(	AVCodecContext *	avctx,
		enum AVHWDeviceType	dev_type
	)

Make sure avctx.hw_frames_ctx is set.

If it's not set, the function will try to allocate it from hw_device_ctx. If that is not possible, an error message is printed, and an error code is returned.

Definition at line 940 of file decode.c.

Referenced by ff_dxva2_decode_init(), ff_vaapi_decode_init(), and ff_vdpau_common_init().

ff_attach_decode_data()

int ff_attach_decode_data

(

AVFrame *

frame

)

Definition at line 1628 of file decode.c.

Referenced by ff_get_buffer(), ff_videotoolbox_alloc_frame(), qsv_get_continuous_buffer(), and wrapped_avframe_decode().

ff_copy_palette()

int ff_copy_palette	(	void *	dst,
		const AVPacket *	src,
		void *	logctx
	)

Check whether the side-data of src contains a palette of size AVPALETTE_SIZE; if so, copy it to dst and return 1; else return 0.

Also emit an error message upon encountering a palette with invalid size.

Definition at line 1854 of file decode.c.

Referenced by cinepak_decode_frame(), decode_frame(), gdv_decode_frame(), idcin_decode_frame(), imx_decode_frame(), ipvideo_decode_frame(), msrle_decode_frame(), msvideo1_decode_frame(), qtrle_decode_frame(), raw_decode(), rscc_decode_frame(), and smc_decode_frame().

ff_decode_preinit()

int ff_decode_preinit

(

AVCodecContext *

avctx

)

Perform decoder initialization and validation.

Called when opening the decoder, before the AVCodec.init() call.

Definition at line 1767 of file decode.c.

Referenced by avcodec_open2().