hvirtual/quicktime/ffmpeg/libavcodec/xvidff.c File Reference

#include <xvid.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"

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Data Structures

struct xvid_context

struct xvid_ff_pass1

Defines

#define BUFFER_SIZE   1024

#define BUFFER_REMAINING(x)   (BUFFER_SIZE - strlen(x))

#define BUFFER_CAT(x)   (&((x)[strlen(x)]))

Typedefs

typedef struct xvid_context xvid_context_t

typedef struct xvid_ff_pass1 xvid_ff_pass1_t

Functions

int xvid_strip_vol_header (AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len)

int xvid_ff_2pass (void *ref, int opt, void *p1, void *p2)

void xvid_correct_framerate (AVCodecContext *avctx)

int ff_xvid_encode_init (AVCodecContext *avctx)

int ff_xvid_encode_frame (AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data)

int ff_xvid_encode_close (AVCodecContext *avctx)

static int xvid_ff_2pass_create (xvid_plg_create_t *param, void **handle)

static int xvid_ff_2pass_destroy (xvid_context_t *ref, xvid_plg_destroy_t *param)

static int xvid_ff_2pass_before (xvid_context_t *ref, xvid_plg_data_t *param)

static int xvid_ff_2pass_after (xvid_context_t *ref, xvid_plg_data_t *param)

Variables

AVCodec xvid_encoder

Define Documentation

#define BUFFER_CAT ( x ) (&((x)[strlen(x)]))

Definition at line 36 of file xvidff.c.

Referenced by xvid_ff_2pass_after(), and xvid_ff_2pass_create().

#define BUFFER_REMAINING ( x ) (BUFFER_SIZE - strlen(x))

Definition at line 35 of file xvidff.c.

Referenced by xvid_ff_2pass_after(), and xvid_ff_2pass_create().

#define BUFFER_SIZE 1024

Buffer management macros.

Definition at line 34 of file xvidff.c.

Typedef Documentation

typedef struct xvid_context xvid_context_t

typedef struct xvid_ff_pass1 xvid_ff_pass1_t

Function Documentation

int ff_xvid_encode_close ( AVCodecContext * avctx )

Destroys the private context for the encoder. All buffers are freed, and the XviD encoder context is destroyed.

Parameters:

avctx

AVCodecContext pointer to context

Returns:: Returns 0, success guaranteed

Definition at line 474 of file xvidff.c.

References av_free(), xvid_context::encoder_handle, AVCodecContext::extradata, xvid_context::inter_matrix, xvid_context::intra_matrix, NULL, xvid_context::old_twopassbuffer, AVCodecContext::priv_data, xvid_context::twopassbuffer, and xvid_context::twopassfile.

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int ff_xvid_encode_frame	(	AVCodecContext *	avctx,
		unsigned char *	frame,
		int	buf_size,
		void *	data
	)

Encodes a single frame.

Parameters:

	avctx	AVCodecContext pointer to context
	frame	Pointer to encoded frame buffer
	buf_size	Size of encoded frame buffer
	data	Pointer to AVFrame of unencoded frame

Returns:: Returns 0 on success, -1 on failure

Definition at line 377 of file xvidff.c.

References av_log(), AV_LOG_ERROR, xvid_context::encoded_picture, xvid_context::encoder_handle, FF_B_TYPE, FF_I_TYPE, FF_P_TYPE, FF_QP2LAMBDA, FF_S_TYPE, xvid_context::inter_matrix, xvid_context::intra_matrix, xvid_context::me_flags, NULL, xvid_context::old_twopassbuffer, picture, AVCodecContext::pix_fmt, PIX_FMT_YUV420P, AVCodecContext::priv_data, xvid_context::qscale, xvid_context::quicktime_format, AVCodecContext::stats_out, xvid_context::twopassbuffer, xvid_context::vol_flags, xvid_context::vop_flags, and xvid_strip_vol_header().

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int ff_xvid_encode_init ( AVCodecContext * avctx )

Creates the private context for the encoder. All buffers are allocated, settings are loaded from the user, and the encoder context created.

Parameters:

avctx

AVCodecContext pointer to context

Returns:: Returns 0 on success, -1 on failure

Definition at line 84 of file xvidff.c.

References av_log(), AV_LOG_ERROR, av_malloc(), AVCodecContext::b_quant_factor, AVCodecContext::b_quant_offset, AVCodecContext::bit_rate, BUFFER_SIZE, CODEC_FLAG_4MV, CODEC_FLAG_AC_PRED, CODEC_FLAG_CLOSED_GOP, CODEC_FLAG_GLOBAL_HEADER, CODEC_FLAG_GMC, CODEC_FLAG_GRAY, CODEC_FLAG_PASS1, CODEC_FLAG_PASS2, CODEC_FLAG_QPEL, CODEC_FLAG_QSCALE, CODEC_FLAG_TRELLIS_QUANT, AVCodecContext::codec_id, CODEC_ID_MPEG4, AVCodecContext::codec_tag, AVCodecContext::coded_frame, xvid_ff_pass1::context, AVRational::den, xvid_context::encoded_picture, xvid_context::encoder_handle, AVCodecContext::extradata, AVCodecContext::extradata_size, AVCodecContext::flags, AVCodecContext::gop_size, has_altivec(), AVCodecContext::height, AVCodecContext::inter_matrix, xvid_context::inter_matrix, AVCodecContext::intra_matrix, xvid_context::intra_matrix, AVCodecContext::lumi_masking, AVCodecContext::max_b_frames, AVCodecContext::mb_decision, ME_EPZS, xvid_context::me_flags, ME_FULL, ME_LOG, AVCodecContext::me_method, ME_PHODS, ME_X1, ME_ZERO, AVCodecContext::mpeg_quant, NULL, AVRational::num, xvid_context::old_twopassbuffer, AVCodecContext::priv_data, AVCodecContext::qmax, AVCodecContext::qmin, xvid_context::qscale, xvid_context::quicktime_format, AVCodecContext::stats_in, AVCodecContext::time_base, xvid_context::twopassbuffer, xvid_context::twopassfile, xvid_ff_pass1::version, xvid_context::vol_flags, xvid_context::vop_flags, AVCodecContext::width, xvid_context::xsize, xvid_correct_framerate(), xvid_ff_2pass(), and xvid_context::ysize.

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void xvid_correct_framerate ( AVCodecContext * avctx )

Routine to correct a possibly erroneous framerate being fed to us. XviD currently chokes on framerates where the ticks per frame is extremely large. This function works to correct problems in this area by estimating a new framerate and taking the simpler fraction of the two presented.

Parameters:

avctx

Context that contains the framerate to correct.

Definition at line 548 of file xvidff.c.

References av_log(), AV_LOG_DEBUG, AVRational::den, ff_gcd(), AVRational::num, and AVCodecContext::time_base.

Referenced by ff_xvid_encode_init().

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int xvid_ff_2pass	(	void *	ref,
		int	cmd,
		void *	p1,
		void *	p2
	)

Dispatch function for our custom plugin. This handles the dispatch for the XviD plugin. It passes data on to other functions for actual processing.

Parameters:

	ref	Context pointer for the plugin
	cmd	The task given for us to complete
	p1	First parameter (varies)
	p2	Second parameter (varies)

Returns:: Returns XVID_ERR_xxxx on failure, or 0 on success

Definition at line 740 of file xvidff.c.

References xvid_ff_2pass_after(), xvid_ff_2pass_before(), xvid_ff_2pass_create(), and xvid_ff_2pass_destroy().

Referenced by ff_xvid_encode_init().

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static int xvid_ff_2pass_after	(	xvid_context_t *	ref,
		xvid_plg_data_t *	param
	)			`[static]`

Captures statistic data and writes it during first pass.

Parameters:

	ref	Context pointer for the plugin
	param	Statistic data

Returns:: Returns XVID_ERR_xxxx on failure, or 0 on success

Definition at line 704 of file xvidff.c.

References BUFFER_CAT, BUFFER_REMAINING, NULL, and xvid_context::twopassbuffer.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_before	(	xvid_context_t *	ref,
		xvid_plg_data_t *	param
	)			`[static]`

Enables fast encode mode during the first pass.

Parameters:

	ref	Context pointer for the plugin
	param	Frame data

Returns:: Returns 0, success guaranteed

Definition at line 661 of file xvidff.c.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_create	(	xvid_plg_create_t *	param,
		void **	handle
	)			`[static]`

Initializes the two-pass plugin and context.

Parameters:

	param	Input construction parameter structure
	handle	Private context handle

Returns:: Returns XVID_ERR_xxxx on failure, or 0 on success.

Definition at line 614 of file xvidff.c.

References BUFFER_CAT, BUFFER_REMAINING, xvid_ff_pass1::context, NULL, and xvid_context::twopassbuffer.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_destroy	(	xvid_context_t *	ref,
		xvid_plg_destroy_t *	param
	)			`[static]`

Destroys the two-pass plugin context.

Parameters:

	ref	Context pointer for the plugin
	param	Destrooy context

Returns:: Returns 0, success guaranteed

Definition at line 645 of file xvidff.c.

References NULL, and xvid_context::twopassbuffer.

Referenced by xvid_ff_2pass().

int xvid_strip_vol_header	(	AVCodecContext *	avctx,
		unsigned char *	frame,
		unsigned int	header_len,
		unsigned int	frame_len
	)

Routine to create a global VO/VOL header for MP4 container. What we do here is extract the header from the XviD bitstream as it is encoded. We also strip the repeated headers from the bitstream when a global header is requested for MPEG-4 ISO compliance.

Parameters:

	avctx	AVCodecContext pointer to context
	frame	Pointer to encoded frame data
	header_len	Length of header to search
	frame_len	Length of encoded frame data

Returns:: Returns new length of frame data

Definition at line 508 of file xvidff.c.

References av_malloc(), AVCodecContext::extradata, AVCodecContext::extradata_size, memcpy, and NULL.

Referenced by ff_xvid_encode_frame().

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Variable Documentation

AVCodec xvid_encoder

Initial value:

 {
    "xvid",
    CODEC_TYPE_VIDEO,
    CODEC_ID_XVID,
    sizeof(xvid_context_t),
    ff_xvid_encode_init,
    ff_xvid_encode_frame,
    ff_xvid_encode_close
}

XviD codec definition for libavcodec.

Definition at line 766 of file xvidff.c.

Referenced by avcodec_register_all().


Data Structures
struct	xvid_context
struct	xvid_ff_pass1
Defines
#define	BUFFER_SIZE 1024
#define	BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
#define	BUFFER_CAT(x) (&((x)[strlen(x)]))
Typedefs
typedef struct xvid_context	xvid_context_t
typedef struct xvid_ff_pass1	xvid_ff_pass1_t
Functions
int	xvid_strip_vol_header (AVCodecContext avctx, unsigned char frame, unsigned int header_len, unsigned int frame_len)
int	xvid_ff_2pass (void ref, int opt, void p1, void *p2)
void	xvid_correct_framerate (AVCodecContext *avctx)
int	ff_xvid_encode_init (AVCodecContext *avctx)
int	ff_xvid_encode_frame (AVCodecContext avctx, unsigned char frame, int buf_size, void *data)
int	ff_xvid_encode_close (AVCodecContext *avctx)
static int	xvid_ff_2pass_create (xvid_plg_create_t param, void *handle)
static int	xvid_ff_2pass_destroy (xvid_context_t ref, xvid_plg_destroy_t param)
static int	xvid_ff_2pass_before (xvid_context_t ref, xvid_plg_data_t param)
static int	xvid_ff_2pass_after (xvid_context_t ref, xvid_plg_data_t param)
Variables
AVCodec	xvid_encoder