libavcodec/vaapi_mpeg4.c - third_party/ffmpeg - Git at Google

 /*
  * MPEG-4 / H.263 HW decode acceleration through VA API
  *
  * Copyright (C) 2008-2009 Splitted-Desktop Systems
  *
  * 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 "h263.h"
 #include "hwaccel.h"
 #include "internal.h"
 #include "mpeg4video.h"
 #include "mpegvideo.h"
 #include "vaapi_decode.h"

 /** Reconstruct bitstream intra_dc_vlc_thr */
 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
 {
     switch (s->intra_dc_threshold) {
     case 99: return 0;
     case 13: return 1;
     case 15: return 2;
     case 17: return 3;
     case 19: return 4;
     case 21: return 5;
     case 23: return 6;
     case 0:  return 7;
     }
     return 0;
 }

 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
 {
     Mpeg4DecContext *ctx = avctx->priv_data;
     MpegEncContext *s = &ctx->m;
     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
     VAPictureParameterBufferMPEG4 pic_param;
     int i, err;

     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);

     pic_param = (VAPictureParameterBufferMPEG4) {
         .vop_width                        = s->width,
         .vop_height                       = s->height,
         .forward_reference_picture        = VA_INVALID_ID,
         .backward_reference_picture       = VA_INVALID_ID,
         .vol_fields.bits = {
             .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
             .chroma_format                = CHROMA_420,
             .interlaced                   = !s->progressive_sequence,
             .obmc_disable                 = 1,
             .sprite_enable                = ctx->vol_sprite_usage,
             .sprite_warping_accuracy      = s->sprite_warping_accuracy,
             .quant_type                   = s->mpeg_quant,
             .quarter_sample               = s->quarter_sample,
             .data_partitioned             = s->data_partitioning,
             .reversible_vlc               = ctx->rvlc,
             .resync_marker_disable        = !ctx->resync_marker,
         },
         .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
         .quant_precision                  = s->quant_precision,
         .vop_fields.bits = {
             .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
             .backward_reference_vop_coding_type =
                 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
             .vop_rounding_type            = s->no_rounding,
             .intra_dc_vlc_thr             = mpeg4_get_intra_dc_vlc_thr(ctx),
             .top_field_first              = s->top_field_first,
             .alternate_vertical_scan_flag = s->alternate_scan,
         },
         .vop_fcode_forward                = s->f_code,
         .vop_fcode_backward               = s->b_code,
         .vop_time_increment_resolution    = avctx->framerate.num,
         .num_macroblocks_in_gob           = s->mb_width * H263_GOB_HEIGHT(s->height),
         .num_gobs_in_vop                  =
             (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
         .TRB                              = s->pb_time,
         .TRD                              = s->pp_time,
     };

     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
         pic_param.sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
         pic_param.sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
     }

     if (s->pict_type == AV_PICTURE_TYPE_B)
         pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
     if (s->pict_type != AV_PICTURE_TYPE_I)
         pic_param.forward_reference_picture  = ff_vaapi_get_surface_id(s->last_picture.f);

     err = ff_vaapi_decode_make_param_buffer(avctx, pic,
                                             VAPictureParameterBufferType,
                                             &pic_param, sizeof(pic_param));
     if (err < 0)
         goto fail;

     /* Only the first inverse quantisation method uses the weighting matrices */
     if (pic_param.vol_fields.bits.quant_type) {
         VAIQMatrixBufferMPEG4 iq_matrix;

         iq_matrix.load_intra_quant_mat     = 1;
         iq_matrix.load_non_intra_quant_mat = 1;

         for (i = 0; i < 64; i++) {
             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
             iq_matrix.intra_quant_mat[i]     = s->intra_matrix[n];
             iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
         }

         err = ff_vaapi_decode_make_param_buffer(avctx, pic,
                                                 VAIQMatrixBufferType,
                                                 &iq_matrix, sizeof(iq_matrix));
         if (err < 0)
             goto fail;
     }
     return 0;

 fail:
     ff_vaapi_decode_cancel(avctx, pic);
     return err;
 }

 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
 {
     MpegEncContext *s = avctx->priv_data;
     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
     int ret;

     ret = ff_vaapi_decode_issue(avctx, pic);
     if (ret < 0)
         goto fail;

     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);

 fail:
     return ret;
 }

 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 {
     MpegEncContext *s = avctx->priv_data;
     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
     VASliceParameterBufferMPEG4 slice_param;
     int err;

     slice_param = (VASliceParameterBufferMPEG4) {
         .slice_data_size   = size,
         .slice_data_offset = 0,
         .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
         .macroblock_offset = get_bits_count(&s->gb) % 8,
         .macroblock_number = 0,
         .quant_scale       = s->qscale,
     };

     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
                                             &slice_param, sizeof(slice_param),
                                             buffer, size);
     if (err < 0) {
         ff_vaapi_decode_cancel(avctx, pic);
         return err;
     }

     return 0;
 }

 #if CONFIG_MPEG4_VAAPI_HWACCEL
 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
     .name                 = "mpeg4_vaapi",
     .type                 = AVMEDIA_TYPE_VIDEO,
     .id                   = AV_CODEC_ID_MPEG4,
     .pix_fmt              = AV_PIX_FMT_VAAPI,
     .start_frame          = &vaapi_mpeg4_start_frame,
     .end_frame            = &vaapi_mpeg4_end_frame,
     .decode_slice         = &vaapi_mpeg4_decode_slice,
     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
     .init                 = &ff_vaapi_decode_init,
     .uninit               = &ff_vaapi_decode_uninit,
     .priv_data_size       = sizeof(VAAPIDecodeContext),
     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 };
 #endif

 #if CONFIG_H263_VAAPI_HWACCEL
 AVHWAccel ff_h263_vaapi_hwaccel = {
     .name                 = "h263_vaapi",
     .type                 = AVMEDIA_TYPE_VIDEO,
     .id                   = AV_CODEC_ID_H263,
     .pix_fmt              = AV_PIX_FMT_VAAPI,
     .start_frame          = &vaapi_mpeg4_start_frame,
     .end_frame            = &vaapi_mpeg4_end_frame,
     .decode_slice         = &vaapi_mpeg4_decode_slice,
     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
     .init                 = &ff_vaapi_decode_init,
     .uninit               = &ff_vaapi_decode_uninit,
     .priv_data_size       = sizeof(VAAPIDecodeContext),
     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 };
 #endif
	/*
	* MPEG-4 / H.263 HW decode acceleration through VA API
	*
	* Copyright (C) 2008-2009 Splitted-Desktop Systems
	*
	* 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 "h263.h"
	#include "hwaccel.h"
	#include "internal.h"
	#include "mpeg4video.h"
	#include "mpegvideo.h"
	#include "vaapi_decode.h"

	/** Reconstruct bitstream intra_dc_vlc_thr */
	static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
	{
	switch (s->intra_dc_threshold) {
	case 99: return 0;
	case 13: return 1;
	case 15: return 2;
	case 17: return 3;
	case 19: return 4;
	case 21: return 5;
	case 23: return 6;
	case 0: return 7;
	}
	return 0;
	}

	static int vaapi_mpeg4_start_frame(AVCodecContext avctx, av_unused const uint8_t buffer, av_unused uint32_t size)
	{
	Mpeg4DecContext *ctx = avctx->priv_data;
	MpegEncContext *s = &ctx->m;
	VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
	VAPictureParameterBufferMPEG4 pic_param;
	int i, err;

	pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);

	pic_param = (VAPictureParameterBufferMPEG4) {
	.vop_width = s->width,
	.vop_height = s->height,
	.forward_reference_picture = VA_INVALID_ID,
	.backward_reference_picture = VA_INVALID_ID,
	.vol_fields.bits = {
	.short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
	.chroma_format = CHROMA_420,
	.interlaced = !s->progressive_sequence,
	.obmc_disable = 1,
	.sprite_enable = ctx->vol_sprite_usage,
	.sprite_warping_accuracy = s->sprite_warping_accuracy,
	.quant_type = s->mpeg_quant,
	.quarter_sample = s->quarter_sample,
	.data_partitioned = s->data_partitioning,
	.reversible_vlc = ctx->rvlc,
	.resync_marker_disable = !ctx->resync_marker,
	},
	.no_of_sprite_warping_points = ctx->num_sprite_warping_points,
	.quant_precision = s->quant_precision,
	.vop_fields.bits = {
	.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
	.backward_reference_vop_coding_type =
	s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
	.vop_rounding_type = s->no_rounding,
	.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
	.top_field_first = s->top_field_first,
	.alternate_vertical_scan_flag = s->alternate_scan,
	},
	.vop_fcode_forward = s->f_code,
	.vop_fcode_backward = s->b_code,
	.vop_time_increment_resolution = avctx->framerate.num,
	.num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
	.num_gobs_in_vop =
	(s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
	.TRB = s->pb_time,
	.TRD = s->pp_time,
	};

	for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
	pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
	pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
	}

	if (s->pict_type == AV_PICTURE_TYPE_B)
	pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
	if (s->pict_type != AV_PICTURE_TYPE_I)
	pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);

	err = ff_vaapi_decode_make_param_buffer(avctx, pic,
	VAPictureParameterBufferType,
	&pic_param, sizeof(pic_param));
	if (err < 0)
	goto fail;

	/* Only the first inverse quantisation method uses the weighting matrices */
	if (pic_param.vol_fields.bits.quant_type) {
	VAIQMatrixBufferMPEG4 iq_matrix;

	iq_matrix.load_intra_quant_mat = 1;
	iq_matrix.load_non_intra_quant_mat = 1;

	for (i = 0; i < 64; i++) {
	int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
	iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
	iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
	}

	err = ff_vaapi_decode_make_param_buffer(avctx, pic,
	VAIQMatrixBufferType,
	&iq_matrix, sizeof(iq_matrix));
	if (err < 0)
	goto fail;
	}
	return 0;

	fail:
	ff_vaapi_decode_cancel(avctx, pic);
	return err;
	}

	static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
	{
	MpegEncContext *s = avctx->priv_data;
	VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
	int ret;

	ret = ff_vaapi_decode_issue(avctx, pic);
	if (ret < 0)
	goto fail;

	ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);

	fail:
	return ret;
	}

	static int vaapi_mpeg4_decode_slice(AVCodecContext avctx, const uint8_t buffer, uint32_t size)
	{
	MpegEncContext *s = avctx->priv_data;
	VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
	VASliceParameterBufferMPEG4 slice_param;
	int err;

	slice_param = (VASliceParameterBufferMPEG4) {
	.slice_data_size = size,
	.slice_data_offset = 0,
	.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
	.macroblock_offset = get_bits_count(&s->gb) % 8,
	.macroblock_number = 0,
	.quant_scale = s->qscale,
	};

	err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
	&slice_param, sizeof(slice_param),
	buffer, size);
	if (err < 0) {
	ff_vaapi_decode_cancel(avctx, pic);
	return err;
	}

	return 0;
	}

	#if CONFIG_MPEG4_VAAPI_HWACCEL
	AVHWAccel ff_mpeg4_vaapi_hwaccel = {
	.name = "mpeg4_vaapi",
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_MPEG4,
	.pix_fmt = AV_PIX_FMT_VAAPI,
	.start_frame = &vaapi_mpeg4_start_frame,
	.end_frame = &vaapi_mpeg4_end_frame,
	.decode_slice = &vaapi_mpeg4_decode_slice,
	.frame_priv_data_size = sizeof(VAAPIDecodePicture),
	.init = &ff_vaapi_decode_init,
	.uninit = &ff_vaapi_decode_uninit,
	.priv_data_size = sizeof(VAAPIDecodeContext),
	.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
	};
	#endif

	#if CONFIG_H263_VAAPI_HWACCEL
	AVHWAccel ff_h263_vaapi_hwaccel = {
	.name = "h263_vaapi",
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_H263,
	.pix_fmt = AV_PIX_FMT_VAAPI,
	.start_frame = &vaapi_mpeg4_start_frame,
	.end_frame = &vaapi_mpeg4_end_frame,
	.decode_slice = &vaapi_mpeg4_decode_slice,
	.frame_priv_data_size = sizeof(VAAPIDecodePicture),
	.init = &ff_vaapi_decode_init,
	.uninit = &ff_vaapi_decode_uninit,
	.priv_data_size = sizeof(VAAPIDecodeContext),
	.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
	};
	#endif