split h264.c to move parser in its own file

Originally committed as revision 8985 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 386 insertions, 0 deletions

diff --git a/libavcodec/h264.h b/libavcodec/h264.h
new file mode 100644
index 0000000000..95c3ab42a9
--- /dev/null
+++ b/libavcodec/h264.h
@@ -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 */