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libmpeg2: Decode only Y on grayscale targets. The chroma skip code is probably less than optimal since it's basically the decoding code with minimum reading of the bitstream but it does the trick for now and gets some more FPS.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16093 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2008-01-16 01:22:56 +00:00
parent 74d61058dc
commit 0c7f2372d5
7 changed files with 680 additions and 115 deletions
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15
apps/plugins/mpegplayer/mpeg2.h
View file

@ -24,6 +24,8 @@
#ifndef MPEG2_H
#define MPEG2_H
#include "mpeg2dec_config.h"
#define MPEG2_VERSION(a,b,c) (((a)<<16)|((b)<<8)|(c))
#define MPEG2_RELEASE MPEG2_VERSION (0, 4, 0) /* 0.4.0 */
@ -100,7 +102,7 @@ typedef struct mpeg2_picture_s
typedef struct mpeg2_fbuf_s
{
uint8_t * buf[3];
uint8_t * buf[MPEG2_COMPONENTS];
void * id;
} mpeg2_fbuf_t;
@ -140,7 +142,7 @@ typedef enum
typedef struct mpeg2_convert_init_s
{
unsigned int id_size;
unsigned int buf_size[3];
unsigned int buf_size[MPEG2_COMPONENTS];
void (* start)(void * id, const mpeg2_fbuf_t * fbuf,
const mpeg2_picture_t * picture, const mpeg2_gop_t * gop);
void (* copy)(void * id, uint8_t * const * src, unsigned int v_offset);
@ -158,7 +160,8 @@ typedef int mpeg2_convert_t (int stage, void * id,
void * arg, mpeg2_convert_init_t * result);
int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg);
int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride);
void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[3], void * id);
void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[MPEG2_COMPONENTS],
void * id);
void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf);
mpeg2dec_t * mpeg2_init (void);
@ -175,8 +178,10 @@ void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end);
void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2);
void mpeg2_init_fbuf (mpeg2_decoder_t * decoder, uint8_t * current_fbuf[3],
uint8_t * forward_fbuf[3], uint8_t * backward_fbuf[3]);
void mpeg2_init_fbuf (mpeg2_decoder_t * decoder,
uint8_t * current_fbuf[MPEG2_COMPONENTS],
uint8_t * forward_fbuf[MPEG2_COMPONENTS],
uint8_t * backward_fbuf[MPEG2_COMPONENTS]);
void mpeg2_slice (mpeg2_decoder_t * decoder, int code, const uint8_t * buffer);
typedef enum