diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/truemotion1.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/truemotion1.c | 923 |
1 files changed, 0 insertions, 923 deletions
diff --git a/src/libffmpeg/libavcodec/truemotion1.c b/src/libffmpeg/libavcodec/truemotion1.c deleted file mode 100644 index 4b7aa976d..000000000 --- a/src/libffmpeg/libavcodec/truemotion1.c +++ /dev/null @@ -1,923 +0,0 @@ -/* - * Duck TrueMotion 1.0 Decoder - * Copyright (C) 2003 Alex Beregszaszi & Mike Melanson - * - * 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 truemotion1.c - * Duck TrueMotion v1 Video Decoder by - * Alex Beregszaszi (alex@fsn.hu) and - * Mike Melanson (melanson@pcisys.net) - * - * The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and - * outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "common.h" -#include "avcodec.h" -#include "dsputil.h" - -#include "truemotion1data.h" - -typedef struct TrueMotion1Context { - AVCodecContext *avctx; - AVFrame frame; - AVFrame prev_frame; - - uint8_t *buf; - int size; - - uint8_t *mb_change_bits; - int mb_change_bits_row_size; - uint8_t *index_stream; - int index_stream_size; - - int flags; - int x, y, w, h; - - uint32_t y_predictor_table[1024]; - uint32_t c_predictor_table[1024]; - uint32_t fat_y_predictor_table[1024]; - uint32_t fat_c_predictor_table[1024]; - - int compression; - int block_type; - int block_width; - int block_height; - - int16_t ydt[8]; - int16_t cdt[8]; - int16_t fat_ydt[8]; - int16_t fat_cdt[8]; - - int last_deltaset, last_vectable; - - unsigned int *vert_pred; - -} TrueMotion1Context; - -#define FLAG_SPRITE 32 -#define FLAG_KEYFRAME 16 -#define FLAG_INTERFRAME 8 -#define FLAG_INTERPOLATED 4 - -struct frame_header { - uint8_t header_size; - uint8_t compression; - uint8_t deltaset; - uint8_t vectable; - uint16_t ysize; - uint16_t xsize; - uint16_t checksum; - uint8_t version; - uint8_t header_type; - uint8_t flags; - uint8_t control; - uint16_t xoffset; - uint16_t yoffset; - uint16_t width; - uint16_t height; -}; - -#define ALGO_NOP 0 -#define ALGO_RGB16V 1 -#define ALGO_RGB16H 2 -#define ALGO_RGB24H 3 - -/* these are the various block sizes that can occupy a 4x4 block */ -#define BLOCK_2x2 0 -#define BLOCK_2x4 1 -#define BLOCK_4x2 2 -#define BLOCK_4x4 3 - -typedef struct comp_types { - int algorithm; - int block_width; // vres - int block_height; // hres - int block_type; -} comp_types; - -/* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */ -static comp_types compression_types[17] = { - { ALGO_NOP, 0, 0, 0 }, - - { ALGO_RGB16V, 4, 4, BLOCK_4x4 }, - { ALGO_RGB16H, 4, 4, BLOCK_4x4 }, - { ALGO_RGB16V, 4, 2, BLOCK_4x2 }, - { ALGO_RGB16H, 4, 2, BLOCK_4x2 }, - - { ALGO_RGB16V, 2, 4, BLOCK_2x4 }, - { ALGO_RGB16H, 2, 4, BLOCK_2x4 }, - { ALGO_RGB16V, 2, 2, BLOCK_2x2 }, - { ALGO_RGB16H, 2, 2, BLOCK_2x2 }, - - { ALGO_NOP, 4, 4, BLOCK_4x4 }, - { ALGO_RGB24H, 4, 4, BLOCK_4x4 }, - { ALGO_NOP, 4, 2, BLOCK_4x2 }, - { ALGO_RGB24H, 4, 2, BLOCK_4x2 }, - - { ALGO_NOP, 2, 4, BLOCK_2x4 }, - { ALGO_RGB24H, 2, 4, BLOCK_2x4 }, - { ALGO_NOP, 2, 2, BLOCK_2x2 }, - { ALGO_RGB24H, 2, 2, BLOCK_2x2 } -}; - -static void select_delta_tables(TrueMotion1Context *s, int delta_table_index) -{ - int i; - - if (delta_table_index > 3) - return; - - memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t)); - memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t)); - memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t)); - memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t)); - - /* Y skinny deltas need to be halved for some reason; maybe the - * skinny Y deltas should be modified */ - for (i = 0; i < 8; i++) - { - /* drop the lsb before dividing by 2-- net effect: round down - * when dividing a negative number (e.g., -3/2 = -2, not -1) */ - s->ydt[i] &= 0xFFFE; - s->ydt[i] /= 2; - } -} - -#ifdef WORDS_BIGENDIAN -static int make_ydt15_entry(int p2, int p1, int16_t *ydt) -#else -static int make_ydt15_entry(int p1, int p2, int16_t *ydt) -#endif -{ - int lo, hi; - - lo = ydt[p1]; - lo += (lo << 5) + (lo << 10); - hi = ydt[p2]; - hi += (hi << 5) + (hi << 10); - return ((lo + (hi << 16)) << 1); -} - -#ifdef WORDS_BIGENDIAN -static int make_cdt15_entry(int p2, int p1, int16_t *cdt) -#else -static int make_cdt15_entry(int p1, int p2, int16_t *cdt) -#endif -{ - int r, b, lo; - - b = cdt[p2]; - r = cdt[p1] << 10; - lo = b + r; - return ((lo + (lo << 16)) << 1); -} - -#ifdef WORDS_BIGENDIAN -static int make_ydt16_entry(int p2, int p1, int16_t *ydt) -#else -static int make_ydt16_entry(int p1, int p2, int16_t *ydt) -#endif -{ - int lo, hi; - - lo = ydt[p1]; - lo += (lo << 6) + (lo << 11); - hi = ydt[p2]; - hi += (hi << 6) + (hi << 11); - return ((lo + (hi << 16)) << 1); -} - -#ifdef WORDS_BIGENDIAN -static int make_cdt16_entry(int p2, int p1, int16_t *cdt) -#else -static int make_cdt16_entry(int p1, int p2, int16_t *cdt) -#endif -{ - int r, b, lo; - - b = cdt[p2]; - r = cdt[p1] << 11; - lo = b + r; - return ((lo + (lo << 16)) << 1); -} - -#ifdef WORDS_BIGENDIAN -static int make_ydt24_entry(int p2, int p1, int16_t *ydt) -#else -static int make_ydt24_entry(int p1, int p2, int16_t *ydt) -#endif -{ - int lo, hi; - - lo = ydt[p1]; - hi = ydt[p2]; - return ((lo + (hi << 8) + (hi << 16)) << 1); -} - -#ifdef WORDS_BIGENDIAN -static int make_cdt24_entry(int p2, int p1, int16_t *cdt) -#else -static int make_cdt24_entry(int p1, int p2, int16_t *cdt) -#endif -{ - int r, b; - - b = cdt[p2]; - r = cdt[p1]<<16; - return ((b+r) << 1); -} - -static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table) -{ - int len, i, j; - unsigned char delta_pair; - - for (i = 0; i < 1024; i += 4) - { - len = *sel_vector_table++ / 2; - for (j = 0; j < len; j++) - { - delta_pair = *sel_vector_table++; - s->y_predictor_table[i+j] = 0xfffffffe & - make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt); - s->c_predictor_table[i+j] = 0xfffffffe & - make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt); - } - s->y_predictor_table[i+(j-1)] |= 1; - s->c_predictor_table[i+(j-1)] |= 1; - } -} - -static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table) -{ - int len, i, j; - unsigned char delta_pair; - - for (i = 0; i < 1024; i += 4) - { - len = *sel_vector_table++ / 2; - for (j = 0; j < len; j++) - { - delta_pair = *sel_vector_table++; - s->y_predictor_table[i+j] = 0xfffffffe & - make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt); - s->c_predictor_table[i+j] = 0xfffffffe & - make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt); - } - s->y_predictor_table[i+(j-1)] |= 1; - s->c_predictor_table[i+(j-1)] |= 1; - } -} - -static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table) -{ - int len, i, j; - unsigned char delta_pair; - - for (i = 0; i < 1024; i += 4) - { - len = *sel_vector_table++ / 2; - for (j = 0; j < len; j++) - { - delta_pair = *sel_vector_table++; - s->y_predictor_table[i+j] = 0xfffffffe & - make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt); - s->c_predictor_table[i+j] = 0xfffffffe & - make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt); - s->fat_y_predictor_table[i+j] = 0xfffffffe & - make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt); - s->fat_c_predictor_table[i+j] = 0xfffffffe & - make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt); - } - s->y_predictor_table[i+(j-1)] |= 1; - s->c_predictor_table[i+(j-1)] |= 1; - s->fat_y_predictor_table[i+(j-1)] |= 1; - s->fat_c_predictor_table[i+(j-1)] |= 1; - } -} - -/* Returns the number of bytes consumed from the bytestream. Returns -1 if - * there was an error while decoding the header */ -static int truemotion1_decode_header(TrueMotion1Context *s) -{ - int i; - struct frame_header header; - uint8_t header_buffer[128]; /* logical maximum size of the header */ - const uint8_t *sel_vector_table; - - /* There is 1 change bit per 4 pixels, so each change byte represents - * 32 pixels; divide width by 4 to obtain the number of change bits and - * then round up to the nearest byte. */ - s->mb_change_bits_row_size = ((s->avctx->width >> 2) + 7) >> 3; - - header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f; - if (s->buf[0] < 0x10) - { - av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]); - return -1; - } - - /* unscramble the header bytes with a XOR operation */ - memset(header_buffer, 0, 128); - for (i = 1; i < header.header_size; i++) - header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1]; - - header.compression = header_buffer[0]; - header.deltaset = header_buffer[1]; - header.vectable = header_buffer[2]; - header.ysize = AV_RL16(&header_buffer[3]); - header.xsize = AV_RL16(&header_buffer[5]); - header.checksum = AV_RL16(&header_buffer[7]); - header.version = header_buffer[9]; - header.header_type = header_buffer[10]; - header.flags = header_buffer[11]; - header.control = header_buffer[12]; - - /* Version 2 */ - if (header.version >= 2) - { - if (header.header_type > 3) - { - av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type); - return -1; - } else if ((header.header_type == 2) || (header.header_type == 3)) { - s->flags = header.flags; - if (!(s->flags & FLAG_INTERFRAME)) - s->flags |= FLAG_KEYFRAME; - } else - s->flags = FLAG_KEYFRAME; - } else /* Version 1 */ - s->flags = FLAG_KEYFRAME; - - if (s->flags & FLAG_SPRITE) { - av_log(s->avctx, AV_LOG_INFO, "SPRITE frame found, please report the sample to the developers\n"); - s->w = header.width; - s->h = header.height; - s->x = header.xoffset; - s->y = header.yoffset; - } else { - s->w = header.xsize; - s->h = header.ysize; - if (header.header_type < 2) { - if ((s->w < 213) && (s->h >= 176)) - { - s->flags |= FLAG_INTERPOLATED; - av_log(s->avctx, AV_LOG_INFO, "INTERPOLATION selected, please report the sample to the developers\n"); - } - } - } - - if (header.compression > 17) { - av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression); - return -1; - } - - if ((header.deltaset != s->last_deltaset) || - (header.vectable != s->last_vectable)) - select_delta_tables(s, header.deltaset); - - if ((header.compression & 1) && header.header_type) - sel_vector_table = pc_tbl2; - else { - if (header.vectable < 4) - sel_vector_table = tables[header.vectable - 1]; - else { - av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable); - return -1; - } - } - - // FIXME: where to place this ?!?! - if (compression_types[header.compression].algorithm == ALGO_RGB24H) - s->avctx->pix_fmt = PIX_FMT_RGBA32; - else - s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported aswell - - if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable)) - { - if (compression_types[header.compression].algorithm == ALGO_RGB24H) - gen_vector_table24(s, sel_vector_table); - else - if (s->avctx->pix_fmt == PIX_FMT_RGB555) - gen_vector_table15(s, sel_vector_table); - else - gen_vector_table16(s, sel_vector_table); - } - - /* set up pointers to the other key data chunks */ - s->mb_change_bits = s->buf + header.header_size; - if (s->flags & FLAG_KEYFRAME) { - /* no change bits specified for a keyframe; only index bytes */ - s->index_stream = s->mb_change_bits; - } else { - /* one change bit per 4x4 block */ - s->index_stream = s->mb_change_bits + - (s->mb_change_bits_row_size * (s->avctx->height >> 2)); - } - s->index_stream_size = s->size - (s->index_stream - s->buf); - - s->last_deltaset = header.deltaset; - s->last_vectable = header.vectable; - s->compression = header.compression; - s->block_width = compression_types[header.compression].block_width; - s->block_height = compression_types[header.compression].block_height; - s->block_type = compression_types[header.compression].block_type; - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n", - s->last_deltaset, s->last_vectable, s->compression, s->block_width, - s->block_height, s->block_type, - s->flags & FLAG_KEYFRAME ? " KEY" : "", - s->flags & FLAG_INTERFRAME ? " INTER" : "", - s->flags & FLAG_SPRITE ? " SPRITE" : "", - s->flags & FLAG_INTERPOLATED ? " INTERPOL" : ""); - - return header.header_size; -} - -static int truemotion1_decode_init(AVCodecContext *avctx) -{ - TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data; - - s->avctx = avctx; - - // FIXME: it may change ? -// if (avctx->bits_per_sample == 24) -// avctx->pix_fmt = PIX_FMT_RGB24; -// else -// avctx->pix_fmt = PIX_FMT_RGB555; - - avctx->has_b_frames = 0; - s->frame.data[0] = s->prev_frame.data[0] = NULL; - - /* there is a vertical predictor for each pixel in a line; each vertical - * predictor is 0 to start with */ - s->vert_pred = - (unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned int)); - - return 0; -} - -/* -Block decoding order: - -dxi: Y-Y -dxic: Y-C-Y -dxic2: Y-C-Y-C - -hres,vres,i,i%vres (0 < i < 4) -2x2 0: 0 dxic2 -2x2 1: 1 dxi -2x2 2: 0 dxic2 -2x2 3: 1 dxi -2x4 0: 0 dxic2 -2x4 1: 1 dxi -2x4 2: 2 dxi -2x4 3: 3 dxi -4x2 0: 0 dxic -4x2 1: 1 dxi -4x2 2: 0 dxic -4x2 3: 1 dxi -4x4 0: 0 dxic -4x4 1: 1 dxi -4x4 2: 2 dxi -4x4 3: 3 dxi -*/ - -#define GET_NEXT_INDEX() \ -{\ - if (index_stream_index >= s->index_stream_size) { \ - av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \ - return; \ - } \ - index = s->index_stream[index_stream_index++] * 4; \ -} - -#define APPLY_C_PREDICTOR() \ - predictor_pair = s->c_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) { \ - GET_NEXT_INDEX() \ - if (!index) { \ - GET_NEXT_INDEX() \ - predictor_pair = s->c_predictor_table[index]; \ - horiz_pred += ((predictor_pair >> 1) * 5); \ - if (predictor_pair & 1) \ - GET_NEXT_INDEX() \ - else \ - index++; \ - } \ - } else \ - index++; - -#define APPLY_C_PREDICTOR_24() \ - predictor_pair = s->c_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) { \ - GET_NEXT_INDEX() \ - if (!index) { \ - GET_NEXT_INDEX() \ - predictor_pair = s->fat_c_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) \ - GET_NEXT_INDEX() \ - else \ - index++; \ - } \ - } else \ - index++; - - -#define APPLY_Y_PREDICTOR() \ - predictor_pair = s->y_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) { \ - GET_NEXT_INDEX() \ - if (!index) { \ - GET_NEXT_INDEX() \ - predictor_pair = s->y_predictor_table[index]; \ - horiz_pred += ((predictor_pair >> 1) * 5); \ - if (predictor_pair & 1) \ - GET_NEXT_INDEX() \ - else \ - index++; \ - } \ - } else \ - index++; - -#define APPLY_Y_PREDICTOR_24() \ - predictor_pair = s->y_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) { \ - GET_NEXT_INDEX() \ - if (!index) { \ - GET_NEXT_INDEX() \ - predictor_pair = s->fat_y_predictor_table[index]; \ - horiz_pred += (predictor_pair >> 1); \ - if (predictor_pair & 1) \ - GET_NEXT_INDEX() \ - else \ - index++; \ - } \ - } else \ - index++; - -#define OUTPUT_PIXEL_PAIR() \ - *current_pixel_pair = *vert_pred + horiz_pred; \ - *vert_pred++ = *current_pixel_pair++; \ - prev_pixel_pair++; - -static void truemotion1_decode_16bit(TrueMotion1Context *s) -{ - int y; - int pixels_left; /* remaining pixels on this line */ - unsigned int predictor_pair; - unsigned int horiz_pred; - unsigned int *vert_pred; - unsigned int *current_pixel_pair; - unsigned int *prev_pixel_pair; - unsigned char *current_line = s->frame.data[0]; - unsigned char *prev_line = s->prev_frame.data[0]; - int keyframe = s->flags & FLAG_KEYFRAME; - - /* these variables are for managing the stream of macroblock change bits */ - unsigned char *mb_change_bits = s->mb_change_bits; - unsigned char mb_change_byte; - unsigned char mb_change_byte_mask; - int mb_change_index; - - /* these variables are for managing the main index stream */ - int index_stream_index = 0; /* yes, the index into the index stream */ - int index; - - /* clean out the line buffer */ - memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int)); - - GET_NEXT_INDEX(); - - for (y = 0; y < s->avctx->height; y++) { - - /* re-init variables for the next line iteration */ - horiz_pred = 0; - current_pixel_pair = (unsigned int *)current_line; - prev_pixel_pair = (unsigned int *)prev_line; - vert_pred = s->vert_pred; - mb_change_index = 0; - mb_change_byte = mb_change_bits[mb_change_index++]; - mb_change_byte_mask = 0x01; - pixels_left = s->avctx->width; - - while (pixels_left > 0) { - - if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) { - - switch (y & 3) { - case 0: - /* if macroblock width is 2, apply C-Y-C-Y; else - * apply C-Y-Y */ - if (s->block_width == 2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } - break; - - case 1: - case 3: - /* always apply 2 Y predictors on these iterations */ - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - break; - - case 2: - /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y - * depending on the macroblock type */ - if (s->block_type == BLOCK_2x2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else if (s->block_type == BLOCK_4x2) { - APPLY_C_PREDICTOR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR(); - OUTPUT_PIXEL_PAIR(); - } - break; - } - - } else { - - /* skip (copy) four pixels, but reassign the horizontal - * predictor */ - *current_pixel_pair = *prev_pixel_pair++; - *vert_pred++ = *current_pixel_pair++; - *current_pixel_pair = *prev_pixel_pair++; - horiz_pred = *current_pixel_pair - *vert_pred; - *vert_pred++ = *current_pixel_pair++; - - } - - if (!keyframe) { - mb_change_byte_mask <<= 1; - - /* next byte */ - if (!mb_change_byte_mask) { - mb_change_byte = mb_change_bits[mb_change_index++]; - mb_change_byte_mask = 0x01; - } - } - - pixels_left -= 4; - } - - /* next change row */ - if (((y + 1) & 3) == 0) - mb_change_bits += s->mb_change_bits_row_size; - - current_line += s->frame.linesize[0]; - prev_line += s->prev_frame.linesize[0]; - } -} - -static void truemotion1_decode_24bit(TrueMotion1Context *s) -{ - int y; - int pixels_left; /* remaining pixels on this line */ - unsigned int predictor_pair; - unsigned int horiz_pred; - unsigned int *vert_pred; - unsigned int *current_pixel_pair; - unsigned int *prev_pixel_pair; - unsigned char *current_line = s->frame.data[0]; - unsigned char *prev_line = s->prev_frame.data[0]; - int keyframe = s->flags & FLAG_KEYFRAME; - - /* these variables are for managing the stream of macroblock change bits */ - unsigned char *mb_change_bits = s->mb_change_bits; - unsigned char mb_change_byte; - unsigned char mb_change_byte_mask; - int mb_change_index; - - /* these variables are for managing the main index stream */ - int index_stream_index = 0; /* yes, the index into the index stream */ - int index; - - /* clean out the line buffer */ - memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int)); - - GET_NEXT_INDEX(); - - for (y = 0; y < s->avctx->height; y++) { - - /* re-init variables for the next line iteration */ - horiz_pred = 0; - current_pixel_pair = (unsigned int *)current_line; - prev_pixel_pair = (unsigned int *)prev_line; - vert_pred = s->vert_pred; - mb_change_index = 0; - mb_change_byte = mb_change_bits[mb_change_index++]; - mb_change_byte_mask = 0x01; - pixels_left = s->avctx->width; - - while (pixels_left > 0) { - - if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) { - - switch (y & 3) { - case 0: - /* if macroblock width is 2, apply C-Y-C-Y; else - * apply C-Y-Y */ - if (s->block_width == 2) { - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - } - break; - - case 1: - case 3: - /* always apply 2 Y predictors on these iterations */ - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - break; - - case 2: - /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y - * depending on the macroblock type */ - if (s->block_type == BLOCK_2x2) { - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - } else if (s->block_type == BLOCK_4x2) { - APPLY_C_PREDICTOR_24(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - } else { - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - APPLY_Y_PREDICTOR_24(); - OUTPUT_PIXEL_PAIR(); - } - break; - } - - } else { - - /* skip (copy) four pixels, but reassign the horizontal - * predictor */ - *current_pixel_pair = *prev_pixel_pair++; - *vert_pred++ = *current_pixel_pair++; - *current_pixel_pair = *prev_pixel_pair++; - horiz_pred = *current_pixel_pair - *vert_pred; - *vert_pred++ = *current_pixel_pair++; - - } - - if (!keyframe) { - mb_change_byte_mask <<= 1; - - /* next byte */ - if (!mb_change_byte_mask) { - mb_change_byte = mb_change_bits[mb_change_index++]; - mb_change_byte_mask = 0x01; - } - } - - pixels_left -= 4; - } - - /* next change row */ - if (((y + 1) & 3) == 0) - mb_change_bits += s->mb_change_bits_row_size; - - current_line += s->frame.linesize[0]; - prev_line += s->prev_frame.linesize[0]; - } -} - - -static int truemotion1_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data; - - s->buf = buf; - s->size = buf_size; - - if (truemotion1_decode_header(s) == -1) - return -1; - - s->frame.reference = 1; - if (avctx->get_buffer(avctx, &s->frame) < 0) { - av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - - /* check for a do-nothing frame and copy the previous frame */ - if (compression_types[s->compression].algorithm == ALGO_NOP) - { - memcpy(s->frame.data[0], s->prev_frame.data[0], - s->frame.linesize[0] * s->avctx->height); - } else if (compression_types[s->compression].algorithm == ALGO_RGB24H) { - truemotion1_decode_24bit(s); - } else { - truemotion1_decode_16bit(s); - } - - if (s->prev_frame.data[0]) - avctx->release_buffer(avctx, &s->prev_frame); - - /* shuffle frames */ - s->prev_frame = s->frame; - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = s->frame; - - /* report that the buffer was completely consumed */ - return buf_size; -} - -static int truemotion1_decode_end(AVCodecContext *avctx) -{ - TrueMotion1Context *s = (TrueMotion1Context *)avctx->priv_data; - - /* release the last frame */ - if (s->prev_frame.data[0]) - avctx->release_buffer(avctx, &s->prev_frame); - - av_free(s->vert_pred); - - return 0; -} - -AVCodec truemotion1_decoder = { - "truemotion1", - CODEC_TYPE_VIDEO, - CODEC_ID_TRUEMOTION1, - sizeof(TrueMotion1Context), - truemotion1_decode_init, - NULL, - truemotion1_decode_end, - truemotion1_decode_frame, - CODEC_CAP_DR1, -}; |