| /* |
| * 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" |
| |
| #include "libavutil/mem_internal.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, |
| }; |
| |
| typedef struct MpegEncContext MPVContext; |
| |
| /** |
| * 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 |
| ScanTable intra_scantable; |
| |
| /* WARNING: changes above this line require updates to hardcoded |
| * offsets used in ASM. */ |
| |
| struct AVCodecContext *avctx; |
| /* 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; |
| |
| 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 |
| enum AVPictureType 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 */ |
| DECLARE_ALIGNED(16, uint16_t, intra_matrix)[64]; |
| DECLARE_ALIGNED(16, uint16_t, chroma_intra_matrix)[64]; |
| DECLARE_ALIGNED(16, uint16_t, inter_matrix)[64]; |
| DECLARE_ALIGNED(16, 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.261 specific */ |
| int mtype; |
| |
| /* 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)(const MPVContext *s, // unquantizer to use (MPEG-4 can use both) |
| int16_t *block/*align 16*/, int n, int qscale); |
| void (*dct_unquantize_inter)(const MPVContext *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; |
| |
| /** |
| * 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 */ |
