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

#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"

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Data Structures
struct	MDECContext
Functions
static int	mdec_decode_block_intra (MDECContext *a, DCTELEM *block, int n)
static int	decode_mb (MDECContext *a, DCTELEM block[6][64])
static void	idct_put (MDECContext *a, int mb_x, int mb_y)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
static void	mdec_common_init (AVCodecContext *avctx)
static int	decode_init (AVCodecContext *avctx)
static int	decode_end (AVCodecContext *avctx)
Variables
AVCodec	mdec_decoder

---

Detailed Description

PSX MDEC codec. This is very similar to intra only MPEG1.

Definition in file mdec.c.

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Function Documentation

static int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 246 of file mdec.c.

References a, av_freep(), MDECContext::bitstream_buffer, MDECContext::bitstream_buffer_size, MDECContext::picture, and AVCodecContext::priv_data.

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static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 157 of file mdec.c.

References a, av_fast_realloc(), av_log(), AV_LOG_ERROR, MDECContext::bitstream_buffer, MDECContext::bitstream_buffer_size, MDECContext::block, decode_mb(), emms_c, FF_INPUT_BUFFER_PADDING_SIZE, MDECContext::gb, get_bits(), get_bits_count(), AVCodecContext::get_buffer, I_TYPE, idct_put(), init_get_bits(), MDECContext::last_dc, MDECContext::mb_height, MDECContext::mb_width, MDECContext::mb_x, MDECContext::mb_y, MDECContext::picture, picture, AVCodecContext::priv_data, MDECContext::qscale, AVCodecContext::release_buffer, skip_bits(), and MDECContext::version.

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static int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 227 of file mdec.c.

References a, av_mallocz(), MDECContext::dsp, ff_init_scantable(), ff_zigzag_direct, DSPContext::idct_permutation, init_vlcs(), MDECContext::mb_height, MDECContext::mb_width, mdec_common_init(), MDECContext::picture, AVCodecContext::priv_data, and MDECContext::scantable.

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static int decode_mb	(	MDECContext *	a,
		DCTELEM	block[6][64]
	)			[inline, static]

Definition at line 125 of file mdec.c.

References DSPContext::clear_blocks, MDECContext::dsp, and mdec_decode_block_intra().

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static void idct_put	(	MDECContext *	a,
		int	mb_x,
		int	mb_y
	)			[inline, static]

Definition at line 138 of file mdec.c.

References MDECContext::avctx, MDECContext::block, CODEC_FLAG_GRAY, MDECContext::dsp, AVCodecContext::flags, DSPContext::idct_put, and MDECContext::picture.

static void mdec_common_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 215 of file mdec.c.

References a, MDECContext::avctx, AVCodecContext::coded_frame, AVCodecContext::coded_height, AVCodecContext::coded_width, MDECContext::dsp, dsputil_init(), MDECContext::mb_height, MDECContext::mb_width, MDECContext::picture, and AVCodecContext::priv_data.

Referenced by decode_init().

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static int mdec_decode_block_intra	(	MDECContext *	a,
		DCTELEM *	block,
		int	n
	)			[inline, static]

Definition at line 57 of file mdec.c.

References av_log(), AV_LOG_ERROR, MDECContext::avctx, MDECContext::block_last_index, CLOSE_READER, decode_dc(), ff_mpeg1_default_intra_matrix, MDECContext::gb, GET_RL_VLC, get_sbits(), MDECContext::last_dc, LAST_SKIP_BITS, level, MDECContext::mb_x, MDECContext::mb_y, OPEN_READER, ScanTable::permutated, MDECContext::qscale, rl_mpeg1, RLTable::rl_vlc, run, MDECContext::scantable, SHOW_SBITS, SHOW_UBITS, SKIP_BITS, TEX_VLC_BITS, UPDATE_CACHE, and MDECContext::version.

Referenced by decode_mb().

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Variable Documentation

AVCodec mdec_decoder

Initial value:

 {
    "mdec",
    CODEC_TYPE_VIDEO,
    CODEC_ID_MDEC,
    sizeof(MDECContext),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
    CODEC_CAP_DR1,
}

Definition at line 256 of file mdec.c.

Referenced by avcodec_register_all().