/* * Generic DCT based hybrid video encoder * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * 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 * mpegvideo header. */ #ifndef AVCODEC_MPEGVIDEO_H #define AVCODEC_MPEGVIDEO_H #include "blockdsp.h" #include "error_resilience.h" #include "h264chroma.h" #include "h263dsp.h" #include "hpeldsp.h" #include "idctdsp.h" #include "mpegpicture.h" #include "qpeldsp.h" #include "videodsp.h" #define MAX_THREADS 32 /** * Scantable. */ typedef struct ScanTable { const uint8_t *scantable; uint8_t permutated[64]; uint8_t raster_end[64]; } ScanTable; enum OutputFormat { FMT_MPEG1, FMT_H261, FMT_H263, FMT_MJPEG, FMT_SPEEDHQ, }; /** * MpegEncContext. */ typedef struct MpegEncContext { AVClass *class; int y_dc_scale, c_dc_scale; int ac_pred; int block_last_index[12]; ///< last non zero coefficient in block int h263_aic; ///< Advanced INTRA Coding (AIC) /* scantables */ ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage /* WARNING: changes above this line require updates to hardcoded * offsets used in ASM. */ ScanTable intra_scantable; uint8_t permutated_intra_h_scantable[64]; uint8_t permutated_intra_v_scantable[64]; struct AVCodecContext *avctx; /* The following pointer is intended for codecs sharing code * between decoder and encoder and in need of a common context to do so. */ void *private_ctx; /* the following parameters must be initialized before encoding */ int width, height;///< picture size. must be a multiple of 16 enum OutputFormat out_format; ///< output format int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ int encoding; ///< true if we are encoding (vs decoding) int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag /* the following fields are managed internally by the encoder */ /* sequence parameters */ int context_initialized; int mb_width, mb_height; ///< number of MBs horizontally & vertically int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication) int mb_num; ///< number of MBs of a picture ptrdiff_t linesize; ///< line size, in bytes, may be different from width ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width struct AVRefStructPool *picture_pool; ///< Pool for MPVPictures BufferPoolContext buffer_pools; int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) union { struct MpegEncContext *thread_context[MAX_THREADS]; struct Mpeg12SliceContext *mpeg12_contexts[MAX_THREADS]; struct MPVEncContext *enc_contexts[MAX_THREADS]; }; int slice_context_count; ///< number of used thread_contexts /** * copy of the previous picture structure. * note, linesize & data, might not match the previous picture (for field pictures) */ MPVWorkPicture last_pic; /** * copy of the next picture structure. * note, linesize & data, might not match the next picture (for field pictures) */ MPVWorkPicture next_pic; /** * copy of the current picture structure. * note, linesize & data, might not match the current picture (for field pictures) */ MPVWorkPicture cur_pic; int last_dc[3]; ///< last DC values for MPEG-1 int16_t *dc_val_base; const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263) uint8_t *coded_block_base; uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1) int16_t (*ac_val_base)[16]; int16_t *dc_val; ///< used for H.263 AIC/MPEG-4 DC prediction and ER int16_t (*ac_val)[16]; ///< used for H.263 AIC, MPEG-4 AC prediction int mb_skipped; ///< MUST BE SET only during DECODING uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example) and used for B-frame encoding & decoding (contains skip table of next P-frame) */ uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding ScratchpadContext sc; int qscale; ///< QP int chroma_qscale; ///< chroma QP int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ... int droppable; BlockDSPContext bdsp; H264ChromaContext h264chroma; HpelDSPContext hdsp; IDCTDSPContext idsp; QpelDSPContext qdsp; VideoDSPContext vdsp; H263DSPContext h263dsp; int16_t (*p_field_mv_table_base)[2]; int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding int mv_dir; #define MV_DIR_FORWARD 1 #define MV_DIR_BACKWARD 2 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4) int mv_type; #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb #define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV) #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors /**motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend on type third " : 0 = x, 1 = y */ int mv[2][4][2]; int field_select[2][2]; int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always 0 */ /* macroblock layer */ int mb_x, mb_y; int mb_intra; int block_index[6]; ///< index to current MB in block based arrays with edges int block_wrap[6]; uint8_t *dest[3]; int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride /** matrix transmitted in the bitstream */ uint16_t intra_matrix[64]; uint16_t chroma_intra_matrix[64]; uint16_t inter_matrix[64]; uint16_t chroma_inter_matrix[64]; /* error concealment / resync */ int resync_mb_x; ///< x position of last resync marker int resync_mb_y; ///< y position of last resync marker /* H.263 specific */ int obmc; ///< overlapped block motion compensation /* H.263+ specific */ int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top /* MPEG-4 specific */ int studio_profile; int last_time_base; int time_base; ///< time in seconds of last I,P,S Frame int64_t time; ///< time of current frame int64_t last_non_b_time; uint16_t pp_time; ///< time distance between the last 2 p,s,i frames uint16_t pb_time; ///< time distance between the last b and p,s,i frame uint16_t pp_field_time; uint16_t pb_field_time; ///< like above, just for interlaced int mcsel; int quarter_sample; ///< 1->qpel, 0->half pel ME/MC int low_delay; ///< no reordering needed / has no B-frames /* MSMPEG4 specific */ int first_slice_line; ///< used in MPEG-4 too to handle resync markers enum { MSMP4_UNUSED, MSMP4_V1, MSMP4_V2, MSMP4_V3, MSMP4_WMV1, MSMP4_WMV2, MSMP4_VC1, ///< for VC1 (image), WMV3 (image) and MSS2. } msmpeg4_version; int inter_intra_pred; int mspel; /* MPEG-2-specific - I wished not to have to support this mess. */ int progressive_sequence; int mpeg_f_code[2][2]; // picture structure defines are loaded from mpegutils.h int picture_structure; int intra_dc_precision; int frame_pred_frame_dct; int top_field_first; int concealment_motion_vectors; int q_scale_type; int intra_vlc_format; int alternate_scan; int repeat_first_field; int chroma_420_type; int chroma_format; #define CHROMA_420 1 #define CHROMA_422 2 #define CHROMA_444 3 int chroma_x_shift;//depend on pix_format, that depend on chroma_format int chroma_y_shift; int progressive_frame; int full_pel[2]; int interlaced_dct; int first_field; ///< is 1 for the first field of a field picture 0 otherwise void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) int16_t *block/*align 16*/, int n, int qscale); /* flag to indicate a reinitialization is required, e.g. after * a frame size change */ int context_reinit; /// If set, ff_mpv_common_init() will allocate slice contexts of this size unsigned slice_ctx_size; ERContext er; } MpegEncContext; typedef MpegEncContext MPVContext; /** * 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. */ void ff_mpv_common_defaults(MpegEncContext *s); int ff_mpv_common_init(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. */ int ff_mpv_init_duplicate_contexts(MpegEncContext *s); /** * Initialize and allocates MpegEncContext fields dependent on the resolution. */ int ff_mpv_init_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. */ void ff_mpv_free_context_frame(MpegEncContext *s); void ff_mpv_common_end(MpegEncContext *s); void ff_clean_intra_table_entries(MpegEncContext *s); int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src); void ff_set_qscale(MpegEncContext * s, int qscale); void ff_mpv_idct_init(MpegEncContext *s); void ff_init_scantable(const uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable); void ff_init_block_index(MpegEncContext *s); void ff_mpv_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t *const *ref_picture, const op_pixels_func (*pix_op)[4], const qpel_mc_func (*qpix_op)[16]); static inline void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample, int lowres, int chroma_x_shift) { const int bytes_per_pixel = 1 + (bits_per_raw_sample > 8); const int block_size = (8 * bytes_per_pixel) >> lowres; s->block_index[0]+=2; s->block_index[1]+=2; s->block_index[2]+=2; s->block_index[3]+=2; s->block_index[4]++; s->block_index[5]++; s->dest[0]+= 2*block_size; s->dest[1] += (2 >> chroma_x_shift) * block_size; s->dest[2] += (2 >> chroma_x_shift) * block_size; } #endif /* AVCODEC_MPEGVIDEO_H */