| /* |
| * XVideo Motion Compensation |
| * Copyright (c) 2003 Ivan Kalvachev |
| * |
| * 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 |
| */ |
| |
| #include <limits.h> |
| #include <X11/extensions/XvMC.h> |
| |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "mpegvideo.h" |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| #include "xvmc.h" |
| #include "xvmc_internal.h" |
| |
| /** |
| * Initializes the block field of the MpegEncContext pointer passed as |
| * parameter after making sure that the data is not corrupted. |
| * In order to implement something like direct rendering instead of decoding |
| * coefficients in s->blocks and then copying them, copy them directly |
| * into the data_blocks array provided by xvmc. |
| */ |
| void ff_xvmc_init_block(MpegEncContext *s) |
| { |
| struct xvmc_pix_fmt *render = (struct xvmc_pix_fmt*)s->current_picture.data[2]; |
| assert(render && render->xvmc_id == AV_XVMC_ID); |
| |
| s->block = (DCTELEM (*)[64])(render->data_blocks + render->next_free_data_block_num * 64); |
| } |
| |
| /** |
| * Fill individual block pointers, so there are no gaps in the data_block array |
| * in case not all blocks in the macroblock are coded. |
| */ |
| void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp) |
| { |
| int i, j = 0; |
| const int mb_block_count = 4 + (1 << s->chroma_format); |
| |
| cbp <<= 12-mb_block_count; |
| for (i = 0; i < mb_block_count; i++) { |
| if (cbp & (1 << 11)) |
| s->pblocks[i] = &s->block[j++]; |
| else |
| s->pblocks[i] = NULL; |
| cbp += cbp; |
| } |
| } |
| |
| /** |
| * Find and store the surfaces that are used as reference frames. |
| * This function should be called for every new field and/or frame. |
| * It should be safe to call the function a few times for the same field. |
| */ |
| int ff_xvmc_field_start(MpegEncContext *s, AVCodecContext *avctx) |
| { |
| struct xvmc_pix_fmt *last, *next, *render = (struct xvmc_pix_fmt*)s->current_picture.data[2]; |
| const int mb_block_count = 4 + (1 << s->chroma_format); |
| |
| assert(avctx); |
| if (!render || render->xvmc_id != AV_XVMC_ID || |
| !render->data_blocks || !render->mv_blocks || |
| (unsigned int)render->allocated_mv_blocks > INT_MAX/(64*6) || |
| (unsigned int)render->allocated_data_blocks > INT_MAX/64 || |
| !render->p_surface) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Render token doesn't look as expected.\n"); |
| return -1; // make sure that this is a render packet |
| } |
| |
| if (render->filled_mv_blocks_num) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Rendering surface contains %i unprocessed blocks.\n", |
| render->filled_mv_blocks_num); |
| return -1; |
| } |
| if (render->allocated_mv_blocks < 1 || |
| render->allocated_data_blocks < render->allocated_mv_blocks*mb_block_count || |
| render->start_mv_blocks_num >= render->allocated_mv_blocks || |
| render->next_free_data_block_num > |
| render->allocated_data_blocks - |
| mb_block_count*(render->allocated_mv_blocks-render->start_mv_blocks_num)) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Rendering surface doesn't provide enough block structures to work with.\n"); |
| return -1; |
| } |
| |
| render->picture_structure = s->picture_structure; |
| render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD; |
| render->p_future_surface = NULL; |
| render->p_past_surface = NULL; |
| |
| switch(s->pict_type) { |
| case FF_I_TYPE: |
| return 0; // no prediction from other frames |
| case FF_B_TYPE: |
| next = (struct xvmc_pix_fmt*)s->next_picture.data[2]; |
| if (!next) |
| return -1; |
| if (next->xvmc_id != AV_XVMC_ID) |
| return -1; |
| render->p_future_surface = next->p_surface; |
| // no return here, going to set forward prediction |
| case FF_P_TYPE: |
| last = (struct xvmc_pix_fmt*)s->last_picture.data[2]; |
| if (!last) |
| last = render; // predict second field from the first |
| if (last->xvmc_id != AV_XVMC_ID) |
| return -1; |
| render->p_past_surface = last->p_surface; |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * Complete frame/field rendering by passing any remaining blocks. |
| * Normally ff_draw_horiz_band() is called for each slice, however, |
| * some leftover blocks, for example from error_resilience(), may remain. |
| * It should be safe to call the function a few times for the same field. |
| */ |
| void ff_xvmc_field_end(MpegEncContext *s) |
| { |
| struct xvmc_pix_fmt *render = (struct xvmc_pix_fmt*)s->current_picture.data[2]; |
| assert(render); |
| |
| if (render->filled_mv_blocks_num > 0) |
| ff_draw_horiz_band(s, 0, 0); |
| } |
| |
| /** |
| * Synthesize the data needed by XvMC to render one macroblock of data. |
| * Fill all relevant fields, if necessary do IDCT. |
| */ |
| void ff_xvmc_decode_mb(MpegEncContext *s) |
| { |
| XvMCMacroBlock *mv_block; |
| struct xvmc_pix_fmt *render; |
| int i, cbp, blocks_per_mb; |
| |
| const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; |
| |
| |
| if (s->encoding) { |
| av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n"); |
| return; |
| } |
| |
| // from MPV_decode_mb(), update DC predictors for P macroblocks |
| if (!s->mb_intra) { |
| s->last_dc[0] = |
| s->last_dc[1] = |
| s->last_dc[2] = 128 << s->intra_dc_precision; |
| } |
| |
| // MC doesn't skip blocks |
| s->mb_skipped = 0; |
| |
| |
| // Do I need to export quant when I could not perform postprocessing? |
| // Anyway, it doesn't hurt. |
| s->current_picture.qscale_table[mb_xy] = s->qscale; |
| |
| // start of XVMC-specific code |
| render = (struct xvmc_pix_fmt*)s->current_picture.data[2]; |
| assert(render); |
| assert(render->xvmc_id == AV_XVMC_ID); |
| assert(render->mv_blocks); |
| |
| // take the next free macroblock |
| mv_block = &render->mv_blocks[render->start_mv_blocks_num + |
| render->filled_mv_blocks_num]; |
| |
| mv_block->x = s->mb_x; |
| mv_block->y = s->mb_y; |
| mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD; |
| if (s->mb_intra) { |
| mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done |
| } else { |
| mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN; |
| |
| if (s->mv_dir & MV_DIR_FORWARD) { |
| mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD; |
| // PMV[n][dir][xy] = mv[dir][n][xy] |
| mv_block->PMV[0][0][0] = s->mv[0][0][0]; |
| mv_block->PMV[0][0][1] = s->mv[0][0][1]; |
| mv_block->PMV[1][0][0] = s->mv[0][1][0]; |
| mv_block->PMV[1][0][1] = s->mv[0][1][1]; |
| } |
| if (s->mv_dir & MV_DIR_BACKWARD) { |
| mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD; |
| mv_block->PMV[0][1][0] = s->mv[1][0][0]; |
| mv_block->PMV[0][1][1] = s->mv[1][0][1]; |
| mv_block->PMV[1][1][0] = s->mv[1][1][0]; |
| mv_block->PMV[1][1][1] = s->mv[1][1][1]; |
| } |
| |
| switch(s->mv_type) { |
| case MV_TYPE_16X16: |
| mv_block->motion_type = XVMC_PREDICTION_FRAME; |
| break; |
| case MV_TYPE_16X8: |
| mv_block->motion_type = XVMC_PREDICTION_16x8; |
| break; |
| case MV_TYPE_FIELD: |
| mv_block->motion_type = XVMC_PREDICTION_FIELD; |
| if (s->picture_structure == PICT_FRAME) { |
| mv_block->PMV[0][0][1] <<= 1; |
| mv_block->PMV[1][0][1] <<= 1; |
| mv_block->PMV[0][1][1] <<= 1; |
| mv_block->PMV[1][1][1] <<= 1; |
| } |
| break; |
| case MV_TYPE_DMV: |
| mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME; |
| if (s->picture_structure == PICT_FRAME) { |
| |
| mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top |
| mv_block->PMV[0][0][1] = s->mv[0][0][1] << 1; |
| |
| mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom |
| mv_block->PMV[0][1][1] = s->mv[0][0][1] << 1; |
| |
| mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom |
| mv_block->PMV[1][0][1] = s->mv[0][2][1] << 1; // dmv01 |
| |
| mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top |
| mv_block->PMV[1][1][1] = s->mv[0][3][1] << 1; // dmv11 |
| |
| } else { |
| mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00 |
| mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01 |
| } |
| break; |
| default: |
| assert(0); |
| } |
| |
| mv_block->motion_vertical_field_select = 0; |
| |
| // set correct field references |
| if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) { |
| mv_block->motion_vertical_field_select |= s->field_select[0][0]; |
| mv_block->motion_vertical_field_select |= s->field_select[1][0] << 1; |
| mv_block->motion_vertical_field_select |= s->field_select[0][1] << 2; |
| mv_block->motion_vertical_field_select |= s->field_select[1][1] << 3; |
| } |
| } // !intra |
| // time to handle data blocks |
| mv_block->index = render->next_free_data_block_num; |
| |
| blocks_per_mb = 6; |
| if (s->chroma_format >= 2) { |
| blocks_per_mb = 4 + (1 << s->chroma_format); |
| } |
| |
| // calculate cbp |
| cbp = 0; |
| for (i = 0; i < blocks_per_mb; i++) { |
| cbp += cbp; |
| if (s->block_last_index[i] >= 0) |
| cbp++; |
| } |
| |
| if (s->flags & CODEC_FLAG_GRAY) { |
| if (s->mb_intra) { // intra frames are always full chroma blocks |
| for (i = 4; i < blocks_per_mb; i++) { |
| memset(s->pblocks[i], 0, sizeof(*s->pblocks[i])); // so we need to clear them |
| if (!render->unsigned_intra) |
| *s->pblocks[i][0] = 1 << 10; |
| } |
| } else { |
| cbp &= 0xf << (blocks_per_mb - 4); |
| blocks_per_mb = 4; // luminance blocks only |
| } |
| } |
| mv_block->coded_block_pattern = cbp; |
| if (cbp == 0) |
| mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN; |
| |
| for (i = 0; i < blocks_per_mb; i++) { |
| if (s->block_last_index[i] >= 0) { |
| // I do not have unsigned_intra MOCO to test, hope it is OK. |
| if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra))) |
| *s->pblocks[i][0] -= 1 << 10; |
| if (!render->idct) { |
| s->dsp.idct(*s->pblocks[i]); |
| /* It is unclear if MC hardware requires pixel diff values to be |
| * in the range [-255;255]. TODO: Clipping if such hardware is |
| * ever found. As of now it would only be an unnecessary |
| * slowdown. */ |
| } |
| // copy blocks only if the codec doesn't support pblocks reordering |
| if (s->avctx->xvmc_acceleration == 1) { |
| memcpy(&render->data_blocks[render->next_free_data_block_num*64], |
| s->pblocks[i], sizeof(*s->pblocks[i])); |
| } |
| render->next_free_data_block_num++; |
| } |
| } |
| render->filled_mv_blocks_num++; |
| |
| assert(render->filled_mv_blocks_num <= render->allocated_mv_blocks); |
| assert(render->next_free_data_block_num <= render->allocated_data_blocks); |
| /* The above conditions should not be able to fail as long as this function |
| * is used and the following 'if ()' automatically calls a callback to free |
| * blocks. */ |
| |
| |
| if (render->filled_mv_blocks_num == render->allocated_mv_blocks) |
| ff_draw_horiz_band(s, 0, 0); |
| } |
