#include <stdint.h>
#include <string.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intmath.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "decode.h"
#include "hwconfig.h"
#include "internal.h"
#include "thread.h"

Data Structures
struct	FramePool

Macros
#define	UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */

Functions
static int	apply_param_change (AVCodecContext avctx, const AVPacket avpkt)

static int	extract_packet_props (AVCodecInternal avci, const AVPacket pkt)

static int	unrefcount_frame (AVCodecInternal avci, AVFrame frame)

int	ff_decode_bsfs_init (AVCodecContext *avctx)
	Called during avcodec_open2() to initialize avctx->internal->bsf. More...

int	ff_decode_get_packet (AVCodecContext avctx, AVPacket pkt)
	Called by decoders to get the next packet for decoding. More...

static int64_t	guess_correct_pts (AVCodecContext *ctx, int64_t reordered_pts, int64_t dts)
	Attempt to guess proper monotonic timestamps for decoded video frames which might have incorrect times. More...

static int	decode_simple_internal (AVCodecContext avctx, AVFrame frame)

static int	decode_simple_receive_frame (AVCodecContext avctx, AVFrame frame)

static int	decode_receive_frame_internal (AVCodecContext avctx, AVFrame frame)

int attribute_align_arg	avcodec_send_packet (AVCodecContext avctx, const AVPacket avpkt)
	Supply raw packet data as input to a decoder. More...

static int	apply_cropping (AVCodecContext avctx, AVFrame frame)

int attribute_align_arg	avcodec_receive_frame (AVCodecContext avctx, AVFrame frame)
	Return decoded output data from a decoder. More...

static int	compat_decode (AVCodecContext avctx, AVFrame frame, int got_frame, const AVPacket pkt)

int attribute_align_arg	avcodec_decode_video2 (AVCodecContext avctx, AVFrame picture, int got_picture_ptr, const AVPacket avpkt)
	Decode the video frame of size avpkt->size from avpkt->data into picture. More...

int attribute_align_arg	avcodec_decode_audio4 (AVCodecContext avctx, AVFrame frame, int got_frame_ptr, const AVPacket avpkt)
	Decode the audio frame of size avpkt->size from avpkt->data into frame. More...

static void	get_subtitle_defaults (AVSubtitle *sub)

static int	recode_subtitle (AVCodecContext avctx, AVPacket outpkt, const AVPacket *inpkt)

static int	utf8_check (const uint8_t *str)

static void	insert_ts (AVBPrint *buf, int ts)

static int	convert_sub_to_old_ass_form (AVSubtitle sub, const AVPacket pkt, AVRational tb)

int	avcodec_decode_subtitle2 (AVCodecContext avctx, AVSubtitle sub, int got_sub_ptr, AVPacket avpkt)
	Decode a subtitle message. More...

enum AVPixelFormat	avcodec_default_get_format (struct AVCodecContext avctx, const enum AVPixelFormat fmt)

int	ff_decode_get_hw_frames_ctx (AVCodecContext *avctx, enum AVHWDeviceType dev_type)
	Make sure avctx.hw_frames_ctx is set. More...

int	avcodec_get_hw_frames_parameters (AVCodecContext avctx, AVBufferRef device_ref, enum AVPixelFormat hw_pix_fmt, AVBufferRef **out_frames_ref)
	Create and return a AVHWFramesContext with values adequate for hardware decoding. More...

static int	hwaccel_init (AVCodecContext avctx, const AVCodecHWConfigInternal hw_config)

static void	hwaccel_uninit (AVCodecContext *avctx)

int	ff_get_format (AVCodecContext avctx, const enum AVPixelFormat fmt)
	Select the (possibly hardware accelerated) pixel format. More...

static void	frame_pool_free (void opaque, uint8_t data)

static AVBufferRef *	frame_pool_alloc (void)

static int	update_frame_pool (AVCodecContext avctx, AVFrame frame)

static int	audio_get_buffer (AVCodecContext avctx, AVFrame frame)

static int	video_get_buffer (AVCodecContext s, AVFrame pic)

int	avcodec_default_get_buffer2 (AVCodecContext avctx, AVFrame frame, int flags)
	The default callback for AVCodecContext.get_buffer2(). More...

static int	add_metadata_from_side_data (const AVPacket avpkt, AVFrame frame)

int	ff_decode_frame_props (AVCodecContext avctx, AVFrame frame)
	Set various frame properties from the codec context / packet data. More...

static void	validate_avframe_allocation (AVCodecContext avctx, AVFrame frame)

static void	decode_data_free (void opaque, uint8_t data)

int	ff_attach_decode_data (AVFrame *frame)

int	ff_get_buffer (AVCodecContext avctx, AVFrame frame, int flags)
	Get a buffer for a frame. More...

static int	reget_buffer_internal (AVCodecContext avctx, AVFrame frame, int flags)

int	ff_reget_buffer (AVCodecContext avctx, AVFrame frame, int flags)
	Identical in function to ff_get_buffer(), except it reuses the existing buffer if available. More...

Macro Definition Documentation

◆ UTF8_MAX_BYTES

#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */

Definition at line 827 of file decode.c.

Function Documentation

◆ apply_param_change()

static int apply_param_change	(	AVCodecContext *	avctx,
		const AVPacket *	avpkt
	)

static

Definition at line 67 of file decode.c.

Referenced by ff_decode_get_packet().

◆ extract_packet_props()

static int extract_packet_props	(	AVCodecInternal *	avci,
		const AVPacket *	pkt
	)

static

Definition at line 145 of file decode.c.

Referenced by avcodec_decode_subtitle2(), and ff_decode_get_packet().

◆ unrefcount_frame()

static int unrefcount_frame	(	AVCodecInternal *	avci,
		AVFrame *	frame
	)

static

Definition at line 158 of file decode.c.

Referenced by compat_decode().

◆ ff_decode_bsfs_init()

int ff_decode_bsfs_init ( AVCodecContext * avctx )

Called during avcodec_open2() to initialize avctx->internal->bsf.

The bsf should be freed with av_bsf_free().

Definition at line 204 of file decode.c.

Referenced by avcodec_open2().

◆ 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 238 of file decode.c.

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

◆ guess_correct_pts()

static int64_t guess_correct_pts	(	AVCodecContext *	ctx,
		int64_t	reordered_pts,
		int64_t	dts
	)

static

Attempt to guess proper monotonic timestamps for decoded video frames which might have incorrect times.

Input timestamps may wrap around, in which case the output will as well.

Parameters

pts	the pts field of the decoded AVPacket, as passed through AVFrame.pts
dts	the dts field of the decoded AVPacket

Returns: one of the input values, may be AV_NOPTS_VALUE

Definition at line 279 of file decode.c.

Referenced by decode_simple_internal().

◆ decode_simple_internal()

static int decode_simple_internal	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

inlinestatic

Definition at line 311 of file decode.c.

Referenced by decode_simple_receive_frame().

◆ decode_simple_receive_frame()

static int decode_simple_receive_frame	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 533 of file decode.c.

Referenced by decode_receive_frame_internal().

◆ decode_receive_frame_internal()

static int decode_receive_frame_internal	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 546 of file decode.c.

Referenced by avcodec_receive_frame(), and avcodec_send_packet().

◆ apply_cropping()

static int apply_cropping	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 622 of file decode.c.

Referenced by avcodec_receive_frame().

◆ compat_decode()

static int compat_decode	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int *	got_frame,
		const AVPacket *	pkt
	)

static

Definition at line 725 of file decode.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

◆ get_subtitle_defaults()

static void get_subtitle_defaults ( AVSubtitle * sub )

static

Definition at line 821 of file decode.c.

Referenced by avcodec_decode_subtitle2().

◆ recode_subtitle()

static int recode_subtitle	(	AVCodecContext *	avctx,
		AVPacket *	outpkt,
		const AVPacket *	inpkt
	)

static

Definition at line 828 of file decode.c.

Referenced by avcodec_decode_subtitle2().

◆ utf8_check()

static int utf8_check ( const uint8_t * str )

static

Definition at line 886 of file decode.c.

Referenced by avcodec_decode_subtitle2().

◆ insert_ts()

static void insert_ts	(	AVBPrint *	buf,
		int	ts
	)

static

Definition at line 906 of file decode.c.

Referenced by convert_sub_to_old_ass_form().

◆ convert_sub_to_old_ass_form()

static int convert_sub_to_old_ass_form	(	AVSubtitle *	sub,
		const AVPacket *	pkt,
		AVRational	tb
	)

static

Definition at line 920 of file decode.c.

Referenced by avcodec_decode_subtitle2().

◆ 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 1130 of file decode.c.

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

◆ hwaccel_init()

static int hwaccel_init	(	AVCodecContext *	avctx,
		const AVCodecHWConfigInternal *	hw_config
	)

static

Definition at line 1230 of file decode.c.

Referenced by ff_get_format().

◆ hwaccel_uninit()

static void hwaccel_uninit ( AVCodecContext * avctx )

static

Definition at line 1267 of file decode.c.

Referenced by ff_get_format().

◆ ff_get_format()

int ff_get_format	(	AVCodecContext *	avctx,
		const enum AVPixelFormat *	fmt
	)

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.

The list of pixel formats must contain at least one valid entry, and is terminated with AV_PIX_FMT_NONE. If it is possible to decode to software, the last entry in the list must be the most accurate software format. If it is not possible to decode to software, AVCodecContext.sw_pix_fmt must be set before calling this function.

Definition at line 1279 of file decode.c.

Referenced by cuvid_decode_init(), decode_init(), ff_mediacodec_dec_init(), ff_mjpeg_decode_sof(), ff_thread_get_format(), ffmmal_init_decoder(), get_pixel_format(), h263_get_format(), qsv_decode_preinit(), submit_packet(), and vc1_decode_init().

◆ frame_pool_free()

static void frame_pool_free	(	void *	opaque,
		uint8_t *	data
	)

static

Definition at line 1416 of file decode.c.

Referenced by frame_pool_alloc().

◆ frame_pool_alloc()

static AVBufferRef* frame_pool_alloc ( void )

static

Definition at line 1427 of file decode.c.

Referenced by update_frame_pool().

◆ update_frame_pool()

static int update_frame_pool	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 1445 of file decode.c.

Referenced by avcodec_default_get_buffer2().

◆ audio_get_buffer()

static int audio_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 1557 of file decode.c.

Referenced by avcodec_default_get_buffer2().

◆ video_get_buffer()

static int video_get_buffer	(	AVCodecContext *	s,
		AVFrame *	pic
	)

static

Definition at line 1602 of file decode.c.

Referenced by avcodec_default_get_buffer2().

◆ add_metadata_from_side_data()

static int add_metadata_from_side_data	(	const AVPacket *	avpkt,
		AVFrame *	frame
	)

static

Definition at line 1673 of file decode.c.

Referenced by ff_decode_frame_props().

◆ 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 1685 of file decode.c.

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

◆ validate_avframe_allocation()

static void validate_avframe_allocation	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 1794 of file decode.c.

Referenced by ff_get_buffer().

◆ decode_data_free()

static void decode_data_free	(	void *	opaque,
		uint8_t *	data
	)

static

Definition at line 1817 of file decode.c.

Referenced by ff_attach_decode_data().

◆ ff_attach_decode_data()

int ff_attach_decode_data ( AVFrame * frame )

Definition at line 1830 of file decode.c.

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

◆ ff_get_buffer()

int ff_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int	flags
	)

Get a buffer for a frame.

This is a wrapper around AVCodecContext.get_buffer() and should be used instead calling get_buffer() directly.

Definition at line 1854 of file decode.c.

Referenced by ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), alloc_frame(), amrnb_decode_frame(), amrwb_decode_frame(), aom_decode(), ape_decode_frame(), aptx_decode_frame(), atrac1_decode_frame(), atrac3_decode_frame(), atrac3al_decode_frame(), atrac3p_decode_frame(), atrac9_decode_frame(), aura_decode_frame(), avui_decode_frame(), bfi_decode_frame(), binkaudio_receive_frame(), bitpacked_decode_yuv422p10(), bmp_decode_frame(), bmv_aud_decode_frame(), cdg_decode_frame(), cdxl_decode_frame(), cinaudio_decode_frame(), cmv_decode_frame(), cng_decode_frame(), cook_decode_frame(), copy_frame(), copy_output(), cuvid_output_frame(), cyuv_decode_frame(), dds_decode(), decode_frame(), decode_pic(), decode_tag(), dfa_decode_frame(), dpcm_decode_frame(), dss_sp_decode_frame(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2(), eightsvx_decode_frame(), escape124_decode_frame(), escape130_decode_frame(), evrc_decode_frame(), execute_code(), fdk_aac_decode_frame(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_snow_common_init_after_header(), ff_snow_get_buffer(), ff_thread_get_buffer(), ff_twinvq_decode_frame(), ff_vp56_decode_frame(), ffat_decode(), ffmal_copy_frame(), filter_frame(), filter_frame_fixed(), filter_frame_float(), fits_decode_frame(), frame_configure_elements(), g2m_decode_frame(), g722_decode_frame(), g723_1_decode_frame(), gdv_decode_frame(), get_buffer(), get_buffer_with_edge(), gif_decode_frame(), gsm_decode_frame(), hcom_decode(), hnm_decode_frame(), hq_decode_frame(), hqa_decode_frame(), idcin_decode_frame(), ilbc_decode_frame(), imc_decode_frame(), init_frames(), ipvideo_decode_frame(), libcelt_dec_decode(), libcodec2_decode(), libgsm_decode_frame(), libopus_decode(), librsvg_decode_frame(), libspeex_decode_frame(), m101_decode_frame(), mace_decode_frame(), mediacodec_wrap_sw_buffer(), mp_decode_frame(), mpc7_decode_frame(), mpc8_decode_frame(), mss2_decode_frame(), mvc_decode_frame(), mxpeg_decode_frame(), oggvorbis_decode_frame(), on2avc_decode_frame(), opus_decode_packet(), output_data(), paf_audio_decode(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcm_dvd_decode_frame(), pcx_decode_frame(), pix_decode_frame(), pnm_decode_frame(), ptx_decode_frame(), qcelp_decode_frame(), qdm2_decode_frame(), qdmc_decode_frame(), ra144_decode_frame(), ra288_decode_frame(), reget_buffer_internal(), rl2_decode_frame(), roq_encode_frame(), s302m_decode_frame(), sbc_decode_frame(), sgirle_decode_frame(), shorten_decode_frame(), sipr_decode_frame(), siren_decode(), smka_decode_frame(), speedhq_decode_frame(), submit_packet(), sunrast_decode_frame(), svc_decode_frame(), svq1_decode_frame(), svq1_encode_frame(), synth_superframe(), tdsc_decode_frame(), tgq_decode_frame(), tgv_decode_frame(), thread_get_buffer_internal(), tmv_decode_frame(), tqi_decode_frame(), truemotion2rt_decode_frame(), truespeech_decode_frame(), txd_decode_frame(), v308_decode_frame(), v408_decode_frame(), vcr1_decode_frame(), vmdaudio_decode_frame(), vmdvideo_decode_frame(), vorbis_decode_frame(), vpx_decode(), vqa_decode_frame(), wavesynth_decode(), wma_decode_superframe(), wmapro_decode_packet(), ws_snd_decode_frame(), xan_decode_frame(), xbm_decode_frame(), xface_decode_frame(), xma_decode_packet(), xpm_decode_frame(), xwd_decode_frame(), y216_decode_frame(), y41p_decode_frame(), yuv4_decode_frame(), zero12v_decode_frame(), and zerocodec_decode_frame().

◆ reget_buffer_internal()

static int reget_buffer_internal	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int	flags
	)

static

Definition at line 1924 of file decode.c.

Referenced by ff_reget_buffer().

◆ ff_reget_buffer()

int ff_reget_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int	flags
	)

Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.

Definition at line 1961 of file decode.c.

Referenced by aasc_decode_frame(), avs_decode_frame(), bethsoftvid_decode_frame(), cdg_decode_frame(), cdtoons_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), clv_decode_frame(), cpia_decode_frame(), decode_frame(), fic_decode_frame(), flashsv_decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_24BPP(), flic_decode_frame_8BPP(), gif_decode_frame(), ir2_decode_frame(), mm_decode_frame(), mp_decode_frame(), msrle_decode_frame(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss4_decode_frame(), msvideo1_decode_frame(), paf_video_decode(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_stream(), rscc_decode_frame(), screenpresso_decode_frame(), seqvideo_decode_frame(), smc_decode_frame(), truemotion1_decode_frame(), tscc2_decode_frame(), ulti_decode_frame(), xan_decode_frame(), and yop_decode_frame().

Data Structures

Macros

Functions

Macro Definition Documentation

◆ UTF8_MAX_BYTES

Function Documentation

◆ apply_param_change()

◆ extract_packet_props()

◆ unrefcount_frame()

◆ ff_decode_bsfs_init()

◆ ff_decode_get_packet()

◆ guess_correct_pts()

◆ decode_simple_internal()

◆ decode_simple_receive_frame()

◆ decode_receive_frame_internal()

◆ apply_cropping()

◆ compat_decode()

◆ get_subtitle_defaults()

◆ recode_subtitle()

◆ utf8_check()

◆ insert_ts()

◆ convert_sub_to_old_ass_form()

◆ ff_decode_get_hw_frames_ctx()

◆ hwaccel_init()

◆ hwaccel_uninit()

◆ ff_get_format()

◆ frame_pool_free()

◆ frame_pool_alloc()

◆ update_frame_pool()

◆ audio_get_buffer()

◆ video_get_buffer()

◆ add_metadata_from_side_data()

◆ ff_decode_frame_props()

◆ validate_avframe_allocation()

◆ decode_data_free()

◆ ff_attach_decode_data()

◆ ff_get_buffer()

◆ reget_buffer_internal()

◆ ff_reget_buffer()