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split h264.c to move parser in its own file 

Originally committed as revision 8985 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Aurelien Jacobs 18 years ago
parent
eca3810e31
commit
26b4fe821c
7 changed files with 586 additions and 474 deletions
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  1. +1
    -0
      configure
  2. +1
    -1
      libavcodec/Makefile
  3. +6
    -0
      libavcodec/cabac.h
  4. +3
    -473
      libavcodec/h264.c
  5. +386
    -0
      libavcodec/h264.h
  6. +149
    -0
      libavcodec/h264_parser.c
  7. +40
    -0
      libavcodec/h264_parser.h

+ 1
- 0
configure View File

@@ -679,6 +679,7 @@ flashsv_encoder_deps="zlib"
flv_decoder_deps="h263_decoder"
h263_decoder_deps="h263_parser mpeg4video_parser"
h263i_decoder_deps="h263_decoder"
h264_decoder_deps="h264_parser"
mpeg_xvmc_decoder_deps="xvmc"
mpeg4_decoder_deps="h263_decoder"
msmpeg4v1_decoder_deps="h263_decoder"


+ 1
- 1
libavcodec/Makefile View File

@@ -290,7 +290,7 @@ OBJS-$(CONFIG_DVBSUB_PARSER) += dvbsub_parser.o
OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsub_parser.o
OBJS-$(CONFIG_H261_PARSER) += h261_parser.o
OBJS-$(CONFIG_H263_PARSER) += h263_parser.o
OBJS-$(CONFIG_H264_PARSER) += h264.o
OBJS-$(CONFIG_H264_PARSER) += h264_parser.o
OBJS-$(CONFIG_MJPEG_PARSER) += mjpeg.o
OBJS-$(CONFIG_MPEG4VIDEO_PARSER) += mpeg4video_parser.o
OBJS-$(CONFIG_MPEGAUDIO_PARSER) += mpegaudio_parser.o


+ 6
- 0
libavcodec/cabac.h View File

@@ -25,6 +25,10 @@
* Context Adaptive Binary Arithmetic Coder.
*/

#ifndef CABAC_H
#define CABAC_H

#include "bitstream.h"

//#undef NDEBUG
#include <assert.h>
@@ -857,3 +861,5 @@ static int get_cabac_ueg(CABACContext *c, uint8_t * state, int max, int is_signe
}else
return i;
}

#endif /* CABAC_H */

+ 3
- 473
libavcodec/h264.c View File

@@ -30,7 +30,9 @@
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "h264.h"
#include "h264data.h"
#include "h264_parser.h"
#include "golomb.h"

#include "cabac.h"
@@ -38,356 +40,6 @@
//#undef NDEBUG
#include <assert.h>

#define interlaced_dct interlaced_dct_is_a_bad_name
#define mb_intra mb_intra_isnt_initalized_see_mb_type

#define LUMA_DC_BLOCK_INDEX 25
#define CHROMA_DC_BLOCK_INDEX 26

#define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
#define COEFF_TOKEN_VLC_BITS 8
#define TOTAL_ZEROS_VLC_BITS 9
#define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
#define RUN_VLC_BITS 3
#define RUN7_VLC_BITS 6

#define MAX_SPS_COUNT 32
#define MAX_PPS_COUNT 256

#define MAX_MMCO_COUNT 66

/* Compiling in interlaced support reduces the speed
* of progressive decoding by about 2%. */
#define ALLOW_INTERLACE

#ifdef ALLOW_INTERLACE
#define MB_MBAFF h->mb_mbaff
#define MB_FIELD h->mb_field_decoding_flag
#define FRAME_MBAFF h->mb_aff_frame
#else
#define MB_MBAFF 0
#define MB_FIELD 0
#define FRAME_MBAFF 0
#undef IS_INTERLACED
#define IS_INTERLACED(mb_type) 0
#endif

/**
* Sequence parameter set
*/
typedef struct SPS{

int profile_idc;
int level_idc;
int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
int poc_type; ///< pic_order_cnt_type
int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
int delta_pic_order_always_zero_flag;
int offset_for_non_ref_pic;
int offset_for_top_to_bottom_field;
int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
int ref_frame_count; ///< num_ref_frames
int gaps_in_frame_num_allowed_flag;
int mb_width; ///< frame_width_in_mbs_minus1 + 1
int mb_height; ///< frame_height_in_mbs_minus1 + 1
int frame_mbs_only_flag;
int mb_aff; ///<mb_adaptive_frame_field_flag
int direct_8x8_inference_flag;
int crop; ///< frame_cropping_flag
int crop_left; ///< frame_cropping_rect_left_offset
int crop_right; ///< frame_cropping_rect_right_offset
int crop_top; ///< frame_cropping_rect_top_offset
int crop_bottom; ///< frame_cropping_rect_bottom_offset
int vui_parameters_present_flag;
AVRational sar;
int timing_info_present_flag;
uint32_t num_units_in_tick;
uint32_t time_scale;
int fixed_frame_rate_flag;
short offset_for_ref_frame[256]; //FIXME dyn aloc?
int bitstream_restriction_flag;
int num_reorder_frames;
int scaling_matrix_present;
uint8_t scaling_matrix4[6][16];
uint8_t scaling_matrix8[2][64];
}SPS;

/**
* Picture parameter set
*/
typedef struct PPS{
unsigned int sps_id;
int cabac; ///< entropy_coding_mode_flag
int pic_order_present; ///< pic_order_present_flag
int slice_group_count; ///< num_slice_groups_minus1 + 1
int mb_slice_group_map_type;
unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
int weighted_pred; ///< weighted_pred_flag
int weighted_bipred_idc;
int init_qp; ///< pic_init_qp_minus26 + 26
int init_qs; ///< pic_init_qs_minus26 + 26
int chroma_qp_index_offset;
int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
int constrained_intra_pred; ///< constrained_intra_pred_flag
int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
int transform_8x8_mode; ///< transform_8x8_mode_flag
uint8_t scaling_matrix4[6][16];
uint8_t scaling_matrix8[2][64];
}PPS;

/**
* Memory management control operation opcode.
*/
typedef enum MMCOOpcode{
MMCO_END=0,
MMCO_SHORT2UNUSED,
MMCO_LONG2UNUSED,
MMCO_SHORT2LONG,
MMCO_SET_MAX_LONG,
MMCO_RESET,
MMCO_LONG,
} MMCOOpcode;

/**
* Memory management control operation.
*/
typedef struct MMCO{
MMCOOpcode opcode;
int short_frame_num;
int long_index;
} MMCO;

/**
* H264Context
*/
typedef struct H264Context{
MpegEncContext s;
int nal_ref_idc;
int nal_unit_type;
uint8_t *rbsp_buffer;
unsigned int rbsp_buffer_size;

/**
* Used to parse AVC variant of h264
*/
int is_avc; ///< this flag is != 0 if codec is avc1
int got_avcC; ///< flag used to parse avcC data only once
int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)

int chroma_qp; //QPc

int prev_mb_skipped;
int next_mb_skipped;

//prediction stuff
int chroma_pred_mode;
int intra16x16_pred_mode;

int top_mb_xy;
int left_mb_xy[2];

int8_t intra4x4_pred_mode_cache[5*8];
int8_t (*intra4x4_pred_mode)[8];
void (*pred4x4 [9+3])(uint8_t *src, uint8_t *topright, int stride);//FIXME move to dsp?
void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride);
void (*pred8x8 [4+3])(uint8_t *src, int stride);
void (*pred16x16[4+3])(uint8_t *src, int stride);
unsigned int topleft_samples_available;
unsigned int top_samples_available;
unsigned int topright_samples_available;
unsigned int left_samples_available;
uint8_t (*top_borders[2])[16+2*8];
uint8_t left_border[2*(17+2*9)];

/**
* non zero coeff count cache.
* is 64 if not available.
*/
DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]);
uint8_t (*non_zero_count)[16];

/**
* Motion vector cache.
*/
DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]);
DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]);
#define LIST_NOT_USED -1 //FIXME rename?
#define PART_NOT_AVAILABLE -2

/**
* is 1 if the specific list MV&references are set to 0,0,-2.
*/
int mv_cache_clean[2];

/**
* number of neighbors (top and/or left) that used 8x8 dct
*/
int neighbor_transform_size;

/**
* block_offset[ 0..23] for frame macroblocks
* block_offset[24..47] for field macroblocks
*/
int block_offset[2*(16+8)];

uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
uint32_t *mb2b8_xy;
int b_stride; //FIXME use s->b4_stride
int b8_stride;

int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff
int mb_uvlinesize;

int emu_edge_width;
int emu_edge_height;

int halfpel_flag;
int thirdpel_flag;

int unknown_svq3_flag;
int next_slice_index;

SPS sps_buffer[MAX_SPS_COUNT];
SPS sps; ///< current sps

PPS pps_buffer[MAX_PPS_COUNT];
/**
* current pps
*/
PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?

uint32_t dequant4_buffer[6][52][16];
uint32_t dequant8_buffer[2][52][64];
uint32_t (*dequant4_coeff[6])[16];
uint32_t (*dequant8_coeff[2])[64];
int dequant_coeff_pps; ///< reinit tables when pps changes

int slice_num;
uint8_t *slice_table_base;
uint8_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
int slice_type;
int slice_type_fixed;

//interlacing specific flags
int mb_aff_frame;
int mb_field_decoding_flag;
int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag

unsigned int sub_mb_type[4];

//POC stuff
int poc_lsb;
int poc_msb;
int delta_poc_bottom;
int delta_poc[2];
int frame_num;
int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
int frame_num_offset; ///< for POC type 2
int prev_frame_num_offset; ///< for POC type 2
int prev_frame_num; ///< frame_num of the last pic for POC type 1/2

/**
* frame_num for frames or 2*frame_num for field pics.
*/
int curr_pic_num;

/**
* max_frame_num or 2*max_frame_num for field pics.
*/
int max_pic_num;

//Weighted pred stuff
int use_weight;
int use_weight_chroma;
int luma_log2_weight_denom;
int chroma_log2_weight_denom;
int luma_weight[2][48];
int luma_offset[2][48];
int chroma_weight[2][48][2];
int chroma_offset[2][48][2];
int implicit_weight[48][48];

//deblock
int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0
int slice_alpha_c0_offset;
int slice_beta_offset;

int redundant_pic_count;

int direct_spatial_mv_pred;
int dist_scale_factor[16];
int dist_scale_factor_field[32];
int map_col_to_list0[2][16];
int map_col_to_list0_field[2][32];

/**
* num_ref_idx_l0/1_active_minus1 + 1
*/
unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
unsigned int list_count;
Picture *short_ref[32];
Picture *long_ref[32];
Picture default_ref_list[2][32];
Picture ref_list[2][48]; ///< 0..15: frame refs, 16..47: mbaff field refs
Picture *delayed_pic[18]; //FIXME size?
Picture *delayed_output_pic;

/**
* memory management control operations buffer.
*/
MMCO mmco[MAX_MMCO_COUNT];
int mmco_index;

int long_ref_count; ///< number of actual long term references
int short_ref_count; ///< number of actual short term references

//data partitioning
GetBitContext intra_gb;
GetBitContext inter_gb;
GetBitContext *intra_gb_ptr;
GetBitContext *inter_gb_ptr;

DECLARE_ALIGNED_8(DCTELEM, mb[16*24]);
DCTELEM mb_padding[256]; ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not to large or ensure that there is some unused stuff after mb

/**
* Cabac
*/
CABACContext cabac;
uint8_t cabac_state[460];
int cabac_init_idc;

/* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
uint16_t *cbp_table;
int cbp;
int top_cbp;
int left_cbp;
/* chroma_pred_mode for i4x4 or i16x16, else 0 */
uint8_t *chroma_pred_mode_table;
int last_qscale_diff;
int16_t (*mvd_table[2])[2];
DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]);
uint8_t *direct_table;
uint8_t direct_cache[5*8];

uint8_t zigzag_scan[16];
uint8_t zigzag_scan8x8[64];
uint8_t zigzag_scan8x8_cavlc[64];
uint8_t field_scan[16];
uint8_t field_scan8x8[64];
uint8_t field_scan8x8_cavlc[64];
const uint8_t *zigzag_scan_q0;
const uint8_t *zigzag_scan8x8_q0;
const uint8_t *zigzag_scan8x8_cavlc_q0;
const uint8_t *field_scan_q0;
const uint8_t *field_scan8x8_q0;
const uint8_t *field_scan8x8_cavlc_q0;

int x264_build;
}H264Context;

static VLC coeff_token_vlc[4];
static VLC chroma_dc_coeff_token_vlc;

@@ -7982,117 +7634,6 @@ static inline int decode_picture_parameter_set(H264Context *h, int bit_length){
return 0;
}

/**
* finds the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
*/
static int find_frame_end(H264Context *h, const uint8_t *buf, int buf_size){
int i;
uint32_t state;
ParseContext *pc = &(h->s.parse_context);
//printf("first %02X%02X%02X%02X\n", buf[0], buf[1],buf[2],buf[3]);
// mb_addr= pc->mb_addr - 1;
state= pc->state;
if(state>13)
state= 7;

for(i=0; i<buf_size; i++){
if(state==7){
for(; i<buf_size; i++){
if(!buf[i]){
state=2;
break;
}
}
}else if(state<=2){
if(buf[i]==1) state^= 5; //2->7, 1->4, 0->5
else if(buf[i]) state = 7;
else state>>=1; //2->1, 1->0, 0->0
}else if(state<=5){
int v= buf[i] & 0x1F;
if(v==7 || v==8 || v==9){
if(pc->frame_start_found){
i++;
found:
pc->state=7;
pc->frame_start_found= 0;
return i-(state&5);
}
}else if(v==1 || v==2 || v==5){
if(pc->frame_start_found){
state+=8;
continue;
}else
pc->frame_start_found = 1;
}
state= 7;
}else{
if(buf[i] & 0x80)
goto found;
state= 7;
}
}
pc->state= state;
return END_NOT_FOUND;
}

#ifdef CONFIG_H264_PARSER
static int h264_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
H264Context *h = s->priv_data;
ParseContext *pc = &h->s.parse_context;
int next;

if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
next= buf_size;
}else{
next= find_frame_end(h, buf, buf_size);

if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}

if(next<0 && next != END_NOT_FOUND){
assert(pc->last_index + next >= 0 );
find_frame_end(h, &pc->buffer[pc->last_index + next], -next); //update state
}
}

*poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}

static int h264_split(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
int i;
uint32_t state = -1;
int has_sps= 0;

for(i=0; i<=buf_size; i++){
if((state&0xFFFFFF1F) == 0x107)
has_sps=1;
/* if((state&0xFFFFFF1F) == 0x101 || (state&0xFFFFFF1F) == 0x102 || (state&0xFFFFFF1F) == 0x105){
}*/
if((state&0xFFFFFF00) == 0x100 && (state&0xFFFFFF1F) != 0x107 && (state&0xFFFFFF1F) != 0x108 && (state&0xFFFFFF1F) != 0x109){
if(has_sps){
while(i>4 && buf[i-5]==0) i--;
return i-4;
}
}
if (i<buf_size)
state= (state<<8) | buf[i];
}
return 0;
}
#endif /* CONFIG_H264_PARSER */

static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
MpegEncContext * const s = &h->s;
AVCodecContext * const avctx= s->avctx;
@@ -8301,7 +7842,7 @@ static int decode_frame(AVCodecContext *avctx,
}

if(s->flags&CODEC_FLAG_TRUNCATED){
int next= find_frame_end(h, buf, buf_size);
int next= ff_h264_find_frame_end(h, buf, buf_size);

if( ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
return buf_size;
@@ -8692,15 +8233,4 @@ AVCodec h264_decoder = {
.flush= flush_dpb,
};

#ifdef CONFIG_H264_PARSER
AVCodecParser h264_parser = {
{ CODEC_ID_H264 },
sizeof(H264Context),
NULL,
h264_parse,
ff_parse_close,
h264_split,
};
#endif

#include "svq3.c"

+ 386
- 0
libavcodec/h264.h View File

@@ -0,0 +1,386 @@
/*
* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/

/**
* @file h264.h
* H.264 / AVC / MPEG4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/

#ifndef H264_H
#define H264_H

#include "dsputil.h"
#include "cabac.h"
#include "mpegvideo.h"

#define interlaced_dct interlaced_dct_is_a_bad_name
#define mb_intra mb_intra_isnt_initalized_see_mb_type

#define LUMA_DC_BLOCK_INDEX 25
#define CHROMA_DC_BLOCK_INDEX 26

#define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
#define COEFF_TOKEN_VLC_BITS 8
#define TOTAL_ZEROS_VLC_BITS 9
#define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
#define RUN_VLC_BITS 3
#define RUN7_VLC_BITS 6

#define MAX_SPS_COUNT 32
#define MAX_PPS_COUNT 256

#define MAX_MMCO_COUNT 66

/* Compiling in interlaced support reduces the speed
* of progressive decoding by about 2%. */
#define ALLOW_INTERLACE

#ifdef ALLOW_INTERLACE
#define MB_MBAFF h->mb_mbaff
#define MB_FIELD h->mb_field_decoding_flag
#define FRAME_MBAFF h->mb_aff_frame
#else
#define MB_MBAFF 0
#define MB_FIELD 0
#define FRAME_MBAFF 0
#undef IS_INTERLACED
#define IS_INTERLACED(mb_type) 0
#endif

/**
* Sequence parameter set
*/
typedef struct SPS{

int profile_idc;
int level_idc;
int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
int poc_type; ///< pic_order_cnt_type
int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
int delta_pic_order_always_zero_flag;
int offset_for_non_ref_pic;
int offset_for_top_to_bottom_field;
int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
int ref_frame_count; ///< num_ref_frames
int gaps_in_frame_num_allowed_flag;
int mb_width; ///< frame_width_in_mbs_minus1 + 1
int mb_height; ///< frame_height_in_mbs_minus1 + 1
int frame_mbs_only_flag;
int mb_aff; ///<mb_adaptive_frame_field_flag
int direct_8x8_inference_flag;
int crop; ///< frame_cropping_flag
int crop_left; ///< frame_cropping_rect_left_offset
int crop_right; ///< frame_cropping_rect_right_offset
int crop_top; ///< frame_cropping_rect_top_offset
int crop_bottom; ///< frame_cropping_rect_bottom_offset
int vui_parameters_present_flag;
AVRational sar;
int timing_info_present_flag;
uint32_t num_units_in_tick;
uint32_t time_scale;
int fixed_frame_rate_flag;
short offset_for_ref_frame[256]; //FIXME dyn aloc?
int bitstream_restriction_flag;
int num_reorder_frames;
int scaling_matrix_present;
uint8_t scaling_matrix4[6][16];
uint8_t scaling_matrix8[2][64];
}SPS;

/**
* Picture parameter set
*/
typedef struct PPS{
unsigned int sps_id;
int cabac; ///< entropy_coding_mode_flag
int pic_order_present; ///< pic_order_present_flag
int slice_group_count; ///< num_slice_groups_minus1 + 1
int mb_slice_group_map_type;
unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
int weighted_pred; ///< weighted_pred_flag
int weighted_bipred_idc;
int init_qp; ///< pic_init_qp_minus26 + 26
int init_qs; ///< pic_init_qs_minus26 + 26
int chroma_qp_index_offset;
int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
int constrained_intra_pred; ///< constrained_intra_pred_flag
int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
int transform_8x8_mode; ///< transform_8x8_mode_flag
uint8_t scaling_matrix4[6][16];
uint8_t scaling_matrix8[2][64];
}PPS;

/**
* Memory management control operation opcode.
*/
typedef enum MMCOOpcode{
MMCO_END=0,
MMCO_SHORT2UNUSED,
MMCO_LONG2UNUSED,
MMCO_SHORT2LONG,
MMCO_SET_MAX_LONG,
MMCO_RESET,
MMCO_LONG,
} MMCOOpcode;

/**
* Memory management control operation.
*/
typedef struct MMCO{
MMCOOpcode opcode;
int short_frame_num;
int long_index;
} MMCO;

/**
* H264Context
*/
typedef struct H264Context{
MpegEncContext s;
int nal_ref_idc;
int nal_unit_type;
uint8_t *rbsp_buffer;
unsigned int rbsp_buffer_size;

/**
* Used to parse AVC variant of h264
*/
int is_avc; ///< this flag is != 0 if codec is avc1
int got_avcC; ///< flag used to parse avcC data only once
int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)

int chroma_qp; //QPc

int prev_mb_skipped;
int next_mb_skipped;

//prediction stuff
int chroma_pred_mode;
int intra16x16_pred_mode;

int top_mb_xy;
int left_mb_xy[2];

int8_t intra4x4_pred_mode_cache[5*8];
int8_t (*intra4x4_pred_mode)[8];
void (*pred4x4 [9+3])(uint8_t *src, uint8_t *topright, int stride);//FIXME move to dsp?
void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride);
void (*pred8x8 [4+3])(uint8_t *src, int stride);
void (*pred16x16[4+3])(uint8_t *src, int stride);
unsigned int topleft_samples_available;
unsigned int top_samples_available;
unsigned int topright_samples_available;
unsigned int left_samples_available;
uint8_t (*top_borders[2])[16+2*8];
uint8_t left_border[2*(17+2*9)];

/**
* non zero coeff count cache.
* is 64 if not available.
*/
DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]);
uint8_t (*non_zero_count)[16];

/**
* Motion vector cache.
*/
DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]);
DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]);
#define LIST_NOT_USED -1 //FIXME rename?
#define PART_NOT_AVAILABLE -2

/**
* is 1 if the specific list MV&references are set to 0,0,-2.
*/
int mv_cache_clean[2];

/**
* number of neighbors (top and/or left) that used 8x8 dct
*/
int neighbor_transform_size;

/**
* block_offset[ 0..23] for frame macroblocks
* block_offset[24..47] for field macroblocks
*/
int block_offset[2*(16+8)];

uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
uint32_t *mb2b8_xy;
int b_stride; //FIXME use s->b4_stride
int b8_stride;

int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff
int mb_uvlinesize;

int emu_edge_width;
int emu_edge_height;

int halfpel_flag;
int thirdpel_flag;

int unknown_svq3_flag;
int next_slice_index;

SPS sps_buffer[MAX_SPS_COUNT];
SPS sps; ///< current sps

PPS pps_buffer[MAX_PPS_COUNT];
/**
* current pps
*/
PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?

uint32_t dequant4_buffer[6][52][16];
uint32_t dequant8_buffer[2][52][64];
uint32_t (*dequant4_coeff[6])[16];
uint32_t (*dequant8_coeff[2])[64];
int dequant_coeff_pps; ///< reinit tables when pps changes

int slice_num;
uint8_t *slice_table_base;
uint8_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
int slice_type;
int slice_type_fixed;

//interlacing specific flags
int mb_aff_frame;
int mb_field_decoding_flag;
int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag

unsigned int sub_mb_type[4];

//POC stuff
int poc_lsb;
int poc_msb;
int delta_poc_bottom;
int delta_poc[2];
int frame_num;
int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
int frame_num_offset; ///< for POC type 2
int prev_frame_num_offset; ///< for POC type 2
int prev_frame_num; ///< frame_num of the last pic for POC type 1/2

/**
* frame_num for frames or 2*frame_num for field pics.
*/
int curr_pic_num;

/**
* max_frame_num or 2*max_frame_num for field pics.
*/
int max_pic_num;

//Weighted pred stuff
int use_weight;
int use_weight_chroma;
int luma_log2_weight_denom;
int chroma_log2_weight_denom;
int luma_weight[2][48];
int luma_offset[2][48];
int chroma_weight[2][48][2];
int chroma_offset[2][48][2];
int implicit_weight[48][48];

//deblock
int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0
int slice_alpha_c0_offset;
int slice_beta_offset;

int redundant_pic_count;

int direct_spatial_mv_pred;
int dist_scale_factor[16];
int dist_scale_factor_field[32];
int map_col_to_list0[2][16];
int map_col_to_list0_field[2][32];

/**
* num_ref_idx_l0/1_active_minus1 + 1
*/
unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
unsigned int list_count;
Picture *short_ref[32];
Picture *long_ref[32];
Picture default_ref_list[2][32];
Picture ref_list[2][48]; ///< 0..15: frame refs, 16..47: mbaff field refs
Picture *delayed_pic[18]; //FIXME size?
Picture *delayed_output_pic;

/**
* memory management control operations buffer.
*/
MMCO mmco[MAX_MMCO_COUNT];
int mmco_index;

int long_ref_count; ///< number of actual long term references
int short_ref_count; ///< number of actual short term references

//data partitioning
GetBitContext intra_gb;
GetBitContext inter_gb;
GetBitContext *intra_gb_ptr;
GetBitContext *inter_gb_ptr;

DECLARE_ALIGNED_8(DCTELEM, mb[16*24]);
DCTELEM mb_padding[256]; ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not to large or ensure that there is some unused stuff after mb

/**
* Cabac
*/
CABACContext cabac;
uint8_t cabac_state[460];
int cabac_init_idc;

/* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
uint16_t *cbp_table;
int cbp;
int top_cbp;
int left_cbp;
/* chroma_pred_mode for i4x4 or i16x16, else 0 */
uint8_t *chroma_pred_mode_table;
int last_qscale_diff;
int16_t (*mvd_table[2])[2];
DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]);
uint8_t *direct_table;
uint8_t direct_cache[5*8];

uint8_t zigzag_scan[16];
uint8_t zigzag_scan8x8[64];
uint8_t zigzag_scan8x8_cavlc[64];
uint8_t field_scan[16];
uint8_t field_scan8x8[64];
uint8_t field_scan8x8_cavlc[64];
const uint8_t *zigzag_scan_q0;
const uint8_t *zigzag_scan8x8_q0;
const uint8_t *zigzag_scan8x8_cavlc_q0;
const uint8_t *field_scan_q0;
const uint8_t *field_scan8x8_q0;
const uint8_t *field_scan8x8_cavlc_q0;

int x264_build;
}H264Context;

#endif /* H264_H */

+ 149
- 0
libavcodec/h264_parser.c View File

@@ -0,0 +1,149 @@
/*
* H.26L/H.264/AVC/JVT/14496-10/... parser
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/

/**
* @file h264_parser.c
* H.264 / AVC / MPEG4 part10 parser.
* @author Michael Niedermayer <michaelni@gmx.at>
*/

#include "parser.h"
#include "h264_parser.h"

#include <assert.h>


int ff_h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size)
{
int i;
uint32_t state;
ParseContext *pc = &(h->s.parse_context);
//printf("first %02X%02X%02X%02X\n", buf[0], buf[1],buf[2],buf[3]);
// mb_addr= pc->mb_addr - 1;
state= pc->state;
if(state>13)
state= 7;

for(i=0; i<buf_size; i++){
if(state==7){
for(; i<buf_size; i++){
if(!buf[i]){
state=2;
break;
}
}
}else if(state<=2){
if(buf[i]==1) state^= 5; //2->7, 1->4, 0->5
else if(buf[i]) state = 7;
else state>>=1; //2->1, 1->0, 0->0
}else if(state<=5){
int v= buf[i] & 0x1F;
if(v==7 || v==8 || v==9){
if(pc->frame_start_found){
i++;
found:
pc->state=7;
pc->frame_start_found= 0;
return i-(state&5);
}
}else if(v==1 || v==2 || v==5){
if(pc->frame_start_found){
state+=8;
continue;
}else
pc->frame_start_found = 1;
}
state= 7;
}else{
if(buf[i] & 0x80)
goto found;
state= 7;
}
}
pc->state= state;
return END_NOT_FOUND;
}

static int h264_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
H264Context *h = s->priv_data;
ParseContext *pc = &h->s.parse_context;
int next;

if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
next= buf_size;
}else{
next= ff_h264_find_frame_end(h, buf, buf_size);

if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}

if(next<0 && next != END_NOT_FOUND){
assert(pc->last_index + next >= 0 );
ff_h264_find_frame_end(h, &pc->buffer[pc->last_index + next], -next); //update state
}
}

*poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}

static int h264_split(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
int i;
uint32_t state = -1;
int has_sps= 0;

for(i=0; i<=buf_size; i++){
if((state&0xFFFFFF1F) == 0x107)
has_sps=1;
/* if((state&0xFFFFFF1F) == 0x101 || (state&0xFFFFFF1F) == 0x102 || (state&0xFFFFFF1F) == 0x105){
}*/
if((state&0xFFFFFF00) == 0x100 && (state&0xFFFFFF1F) != 0x107 && (state&0xFFFFFF1F) != 0x108 && (state&0xFFFFFF1F) != 0x109){
if(has_sps){
while(i>4 && buf[i-5]==0) i--;
return i-4;
}
}
if (i<buf_size)
state= (state<<8) | buf[i];
}
return 0;
}


AVCodecParser h264_parser = {
{ CODEC_ID_H264 },
sizeof(H264Context),
NULL,
h264_parse,
ff_parse_close,
h264_split,
};

+ 40
- 0
libavcodec/h264_parser.h View File

@@ -0,0 +1,40 @@
/*
* H.26L/H.264/AVC/JVT/14496-10/... parser
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/

/**
* @file h264_parser.h
* H.264 / AVC / MPEG4 part10 parser.
* @author Michael Niedermayer <michaelni@gmx.at>
*/

#ifndef H264_PARSER_H
#define H264_PARSER_H

#include "h264.h"

/**
* finds the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
*/
int ff_h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size);

#endif /* H264_PARSER_H */

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