mpegvideo.c File Reference

The simplest mpeg encoder (well, it was the simplest!). More...

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "idctdsp.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#include "libavutil/refstruct.h"

Go to the source code of this file.

Macros
#define	COPY(M)
#define	BACKUP(T, member)
#define	RESTORE(T, member)
#define	ALLOC_POOL(name, size, flags)

Functions
static void	gray16 (uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
static void	gray8 (uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
static av_cold void	dsp_init (MpegEncContext *s)
av_cold void	ff_mpv_idct_init (MpegEncContext *s)
av_cold int	ff_mpv_init_duplicate_contexts (MpegEncContext *s)
	Initialize an MpegEncContext's thread contexts.
static av_cold void	free_duplicate_context (MpegEncContext *s)
static av_cold void	free_duplicate_contexts (MpegEncContext *s)
int	ff_update_duplicate_context (MpegEncContext *dst, const MpegEncContext *src)
av_cold void	ff_mpv_common_defaults (MpegEncContext *s)
	Set the given MpegEncContext to common defaults (same for encoding and decoding).
static av_cold void	free_buffer_pools (BufferPoolContext *pools)
av_cold int	ff_mpv_init_context_frame (MpegEncContext *s)
	Initialize and allocates MpegEncContext fields dependent on the resolution.
av_cold int	ff_mpv_common_init (MpegEncContext *s)
	init common structure for both encoder and decoder.
av_cold void	ff_mpv_free_context_frame (MpegEncContext *s)
	Frees and resets MpegEncContext fields depending on the resolution as well as the slice thread contexts.
av_cold void	ff_mpv_common_end (MpegEncContext *s)
void	ff_clean_intra_table_entries (MpegEncContext *s)
	Clean dc, ac for the current non-intra MB.
void	ff_init_block_index (MpegEncContext *s)
void	ff_set_qscale (MpegEncContext *s, int qscale)
	set qscale and update qscale dependent variables.

Detailed Description

The simplest mpeg encoder (well, it was the simplest!).

Definition in file mpegvideo.c.

Macro Definition Documentation

COPY

#define COPY

(

M

)

Value:

    M(ScratchpadContext, sc) \
    M(int, start_mb_y)       \
    M(int, end_mb_y)         \
    M(int16_t*, dc_val)      \
    M(void*, ac_val)

Referenced by ff_update_duplicate_context().

BACKUP

#define BACKUP	(		T,
			member )

Value:

T member = dst->member;

Referenced by ff_update_duplicate_context().

RESTORE

#define RESTORE	(		T,
			member )

Value:

dst->member = member;

Referenced by ff_update_duplicate_context().

ALLOC_POOL

#define ALLOC_POOL	(		name,
			size,
			flags )

Value:

    do { \
    pools->name ##_pool = av_refstruct_pool_alloc((size), (flags)); \
    if (!pools->name ##_pool) \
        return AVERROR(ENOMEM); \
} while (0)

Referenced by ff_mpv_init_context_frame().

Function Documentation

gray16()

static void gray16 ( uint8_t * dst, const uint8_t * src, ptrdiff_t linesize, int h )

static

Definition at line 48 of file mpegvideo.c.

Referenced by dsp_init().

gray8()

static void gray8 ( uint8_t * dst, const uint8_t * src, ptrdiff_t linesize, int h )

static

Definition at line 54 of file mpegvideo.c.

Referenced by dsp_init().

dsp_init()

static av_cold void dsp_init ( MpegEncContext * s )

static

Definition at line 61 of file mpegvideo.c.

Referenced by ff_mpv_common_init().

ff_mpv_idct_init()

av_cold void ff_mpv_idct_init

(

MpegEncContext *

s

)

Definition at line 81 of file mpegvideo.c.

Referenced by dnxhd_encode_init(), ff_h263_decode_frame(), ff_mpv_decode_init(), and ff_mpv_encode_init().

ff_mpv_init_duplicate_contexts()

av_cold int ff_mpv_init_duplicate_contexts

(

MpegEncContext *

s

)

Initialize an MpegEncContext's thread contexts.

Presumes that slice_context_count is already set and that all the fields that are freed/reset in free_duplicate_context() are NULL.

Definition at line 99 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), ff_mpv_common_init(), and ff_mpv_encode_init().

free_duplicate_context()

static av_cold void free_duplicate_context ( MpegEncContext * s )

static

Definition at line 119 of file mpegvideo.c.

Referenced by free_duplicate_contexts().

free_duplicate_contexts()

static av_cold void free_duplicate_contexts ( MpegEncContext * s )

static

Definition at line 130 of file mpegvideo.c.

Referenced by ff_mpv_free_context_frame().

ff_update_duplicate_context()

int ff_update_duplicate_context	(	MpegEncContext *	dst,
		const MpegEncContext *	src )

Definition at line 139 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

ff_mpv_common_defaults()

av_cold void ff_mpv_common_defaults

(

MpegEncContext *

s

)

Set the given MpegEncContext to common defaults (same for encoding and decoding).

The changed fields will not depend upon the prior state of the MpegEncContext.

Definition at line 171 of file mpegvideo.c.

Referenced by ff_mpv_decode_init(), and mpv_encode_defaults().

free_buffer_pools()

static av_cold void free_buffer_pools ( BufferPoolContext * pools )

static

Definition at line 181 of file mpegvideo.c.

Referenced by ff_mpv_free_context_frame().

ff_mpv_init_context_frame()

av_cold int ff_mpv_init_context_frame

(

MpegEncContext *

s

)

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 191 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and ff_mpv_common_init().

ff_mpv_common_init()

av_cold int ff_mpv_common_init

(

MpegEncContext *

s

)

init common structure for both encoder and decoder.

this assumes that some variables like width/height are already set

Definition at line 359 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpv_encode_init(), ff_rv34_decode_init(), ff_vc1_decode_init(), h261_decode_frame(), mpeg_decode_postinit(), rv20_decode_picture_header(), and vcr2_init_sequence().

ff_mpv_free_context_frame()

av_cold void ff_mpv_free_context_frame

(

MpegEncContext *

s

)

Frees and resets MpegEncContext fields depending on the resolution as well as the slice thread contexts.

Is used during resolution changes to avoid a full reinitialization of the codec.

Definition at line 402 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

ff_mpv_common_end()

av_cold void ff_mpv_common_end

(

MpegEncContext *

s

)

Definition at line 428 of file mpegvideo.c.

Referenced by ff_mpv_common_init(), ff_mpv_decode_close(), ff_mpv_encode_end(), h261_decode_frame(), mpeg_decode_postinit(), rv20_decode_picture_header(), vc1_decode_reset(), and vcr2_init_sequence().

ff_clean_intra_table_entries()

void ff_clean_intra_table_entries

(

MpegEncContext *

s

)

Clean dc, ac for the current non-intra MB.

Definition at line 447 of file mpegvideo.c.

Referenced by ff_h263_clean_intra_table_entries().

ff_init_block_index()

void ff_init_block_index

(

MpegEncContext *

s

)

Definition at line 472 of file mpegvideo.c.

Referenced by decode_slice(), encode_thread(), estimate_motion_thread(), ff_h261_reorder_mb_index(), h261_init_dest(), init_block_index(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg_decode_slice(), rv10_decode_packet(), and rv34_decode_slice().

ff_set_qscale()

void ff_set_qscale	(	MpegEncContext *	s,
		int	qscale )

set qscale and update qscale dependent variables.

Definition at line 505 of file mpegvideo.c.

Referenced by decode_slice(), encode_mb_internal(), encode_thread(), h261_encode_mb(), h263_decode_dquant(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg4_decode_partitioned_mb(), and rv10_decode_packet().