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libavcodec/vaapi_mpeg4.c

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00001 /*
00002  * MPEG-4 / H.263 HW decode acceleration through VA API
00003  *
00004  * Copyright (C) 2008-2009 Splitted-Desktop Systems
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "vaapi_internal.h"
00024 
00026 static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s)
00027 {
00028     switch (s->intra_dc_threshold) {
00029     case 99: return 0;
00030     case 13: return 1;
00031     case 15: return 2;
00032     case 17: return 3;
00033     case 19: return 4;
00034     case 21: return 5;
00035     case 23: return 6;
00036     case 0:  return 7;
00037     }
00038     return 0;
00039 }
00040 
00041 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
00042 {
00043     MpegEncContext * const s = avctx->priv_data;
00044     struct vaapi_context * const vactx = avctx->hwaccel_context;
00045     VAPictureParameterBufferMPEG4 *pic_param;
00046     VAIQMatrixBufferMPEG4 *iq_matrix;
00047     int i;
00048 
00049     dprintf(avctx, "vaapi_mpeg4_start_frame()\n");
00050 
00051     vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
00052 
00053     /* Fill in VAPictureParameterBufferMPEG4 */
00054     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
00055     if (!pic_param)
00056         return -1;
00057     pic_param->vop_width                                = s->width;
00058     pic_param->vop_height                               = s->height;
00059     pic_param->forward_reference_picture                = VA_INVALID_ID;
00060     pic_param->backward_reference_picture               = VA_INVALID_ID;
00061     pic_param->vol_fields.value                         = 0; /* reset all bits */
00062     pic_param->vol_fields.bits.short_video_header       = avctx->codec->id == CODEC_ID_H263;
00063     pic_param->vol_fields.bits.chroma_format            = CHROMA_420;
00064     pic_param->vol_fields.bits.interlaced               = !s->progressive_sequence;
00065     pic_param->vol_fields.bits.obmc_disable             = 1;
00066     pic_param->vol_fields.bits.sprite_enable            = s->vol_sprite_usage;
00067     pic_param->vol_fields.bits.sprite_warping_accuracy  = s->sprite_warping_accuracy;
00068     pic_param->vol_fields.bits.quant_type               = s->mpeg_quant;
00069     pic_param->vol_fields.bits.quarter_sample           = s->quarter_sample;
00070     pic_param->vol_fields.bits.data_partitioned         = s->data_partitioning;
00071     pic_param->vol_fields.bits.reversible_vlc           = s->rvlc;
00072     pic_param->vol_fields.bits.resync_marker_disable    = !s->resync_marker;
00073     pic_param->no_of_sprite_warping_points              = s->num_sprite_warping_points;
00074     for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) {
00075         pic_param->sprite_trajectory_du[i]              = s->sprite_traj[i][0];
00076         pic_param->sprite_trajectory_dv[i]              = s->sprite_traj[i][1];
00077     }
00078     pic_param->quant_precision                          = s->quant_precision;
00079     pic_param->vop_fields.value                         = 0; /* reset all bits */
00080     pic_param->vop_fields.bits.vop_coding_type          = s->pict_type - FF_I_TYPE;
00081     pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == FF_B_TYPE ? s->next_picture.pict_type - FF_I_TYPE : 0;
00082     pic_param->vop_fields.bits.vop_rounding_type        = s->no_rounding;
00083     pic_param->vop_fields.bits.intra_dc_vlc_thr         = mpeg4_get_intra_dc_vlc_thr(s);
00084     pic_param->vop_fields.bits.top_field_first          = s->top_field_first;
00085     pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
00086     pic_param->vop_fcode_forward                        = s->f_code;
00087     pic_param->vop_fcode_backward                       = s->b_code;
00088     pic_param->vop_time_increment_resolution            = avctx->time_base.den;
00089     pic_param->num_macroblocks_in_gob                   = s->mb_width * ff_h263_get_gob_height(s);
00090     pic_param->num_gobs_in_vop                          = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
00091     pic_param->TRB                                      = s->pb_time;
00092     pic_param->TRD                                      = s->pp_time;
00093 
00094     if (s->pict_type == FF_B_TYPE)
00095         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
00096     if (s->pict_type != FF_I_TYPE)
00097         pic_param->forward_reference_picture  = ff_vaapi_get_surface_id(&s->last_picture);
00098 
00099     /* Fill in VAIQMatrixBufferMPEG4 */
00100     /* Only the first inverse quantisation method uses the weighthing matrices */
00101     if (pic_param->vol_fields.bits.quant_type) {
00102         iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
00103         if (!iq_matrix)
00104             return -1;
00105         iq_matrix->load_intra_quant_mat         = 1;
00106         iq_matrix->load_non_intra_quant_mat     = 1;
00107 
00108         for (i = 0; i < 64; i++) {
00109             int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
00110             iq_matrix->intra_quant_mat[i]       = s->intra_matrix[n];
00111             iq_matrix->non_intra_quant_mat[i]   = s->inter_matrix[n];
00112         }
00113     }
00114     return 0;
00115 }
00116 
00117 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
00118 {
00119     return ff_vaapi_common_end_frame(avctx->priv_data);
00120 }
00121 
00122 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
00123 {
00124     MpegEncContext * const s = avctx->priv_data;
00125     VASliceParameterBufferMPEG4 *slice_param;
00126 
00127     dprintf(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
00128 
00129     /* video_plane_with_short_video_header() contains all GOBs
00130      * in-order, and this is what VA API (Intel backend) expects: only
00131      * a single slice param. So fake macroblock_number for FFmpeg so
00132      * that we don't call vaapi_mpeg4_decode_slice() again
00133      */
00134     if (avctx->codec->id == CODEC_ID_H263)
00135         size = s->gb.buffer_end - buffer;
00136 
00137     /* Fill in VASliceParameterBufferMPEG4 */
00138     slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
00139     if (!slice_param)
00140         return -1;
00141     slice_param->macroblock_offset      = get_bits_count(&s->gb) % 8;
00142     slice_param->macroblock_number      = s->mb_y * s->mb_width + s->mb_x;
00143     slice_param->quant_scale            = s->qscale;
00144 
00145     if (avctx->codec->id == CODEC_ID_H263)
00146         s->mb_y = s->mb_height;
00147 
00148     return 0;
00149 }
00150 
00151 #if CONFIG_MPEG4_VAAPI_HWACCEL
00152 AVHWAccel mpeg4_vaapi_hwaccel = {
00153     .name           = "mpeg4_vaapi",
00154     .type           = AVMEDIA_TYPE_VIDEO,
00155     .id             = CODEC_ID_MPEG4,
00156     .pix_fmt        = PIX_FMT_VAAPI_VLD,
00157     .capabilities   = 0,
00158     .start_frame    = vaapi_mpeg4_start_frame,
00159     .end_frame      = vaapi_mpeg4_end_frame,
00160     .decode_slice   = vaapi_mpeg4_decode_slice,
00161     .priv_data_size = 0,
00162 };
00163 #endif
00164 
00165 #if CONFIG_H263_VAAPI_HWACCEL
00166 AVHWAccel h263_vaapi_hwaccel = {
00167     .name           = "h263_vaapi",
00168     .type           = AVMEDIA_TYPE_VIDEO,
00169     .id             = CODEC_ID_H263,
00170     .pix_fmt        = PIX_FMT_VAAPI_VLD,
00171     .capabilities   = 0,
00172     .start_frame    = vaapi_mpeg4_start_frame,
00173     .end_frame      = vaapi_mpeg4_end_frame,
00174     .decode_slice   = vaapi_mpeg4_decode_slice,
00175     .priv_data_size = 0,
00176 };
00177 #endif

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