lavc/vaapi: Add VP8 decode hwaccel

1 files changed, 231 insertions, 0 deletions

diff --git a/libavcodec/vaapi_vp8.c b/libavcodec/vaapi_vp8.c
new file mode 100644
index 0000000000..a130c04e1d
--- /dev/null
+++ b/libavcodec/vaapi_vp8.c
@@ -0,0 +1,231 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "vaapi_decode.h"
+#include "vp8.h"
+
+static VASurfaceID vaapi_vp8_surface_id(VP8Frame *vf)
+{
+    if (vf)
+        return ff_vaapi_get_surface_id(vf->tf.f);
+    else
+        return VA_INVALID_SURFACE;
+}
+
+static int vaapi_vp8_start_frame(AVCodecContext          *avctx,
+                                 av_unused const uint8_t *buffer,
+                                 av_unused uint32_t       size)
+{
+    const VP8Context *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->framep[VP56_FRAME_CURRENT]->hwaccel_picture_private;
+    VAPictureParameterBufferVP8 pp;
+    VAProbabilityDataBufferVP8 prob;
+    VAIQMatrixBufferVP8 quant;
+    int err, i, j, k;
+
+    pic->output_surface = vaapi_vp8_surface_id(s->framep[VP56_FRAME_CURRENT]);
+
+    pp = (VAPictureParameterBufferVP8) {
+        .frame_width                     = avctx->width,
+        .frame_height                    = avctx->height,
+
+        .last_ref_frame                  = vaapi_vp8_surface_id(s->framep[VP56_FRAME_PREVIOUS]),
+        .golden_ref_frame                = vaapi_vp8_surface_id(s->framep[VP56_FRAME_GOLDEN]),
+        .alt_ref_frame                   = vaapi_vp8_surface_id(s->framep[VP56_FRAME_GOLDEN2]),
+        .out_of_loop_frame               = VA_INVALID_SURFACE,
+
+        .pic_fields.bits = {
+            .key_frame                   = !s->keyframe,
+            .version                     = s->profile,
+
+            .segmentation_enabled        = s->segmentation.enabled,
+            .update_mb_segmentation_map  = s->segmentation.update_map,
+            .update_segment_feature_data = s->segmentation.update_feature_data,
+
+            .filter_type                 = s->filter.simple,
+            .sharpness_level             = s->filter.sharpness,
+
+            .loop_filter_adj_enable      = s->lf_delta.enabled,
+            .mode_ref_lf_delta_update    = s->lf_delta.update,
+
+            .sign_bias_golden            = s->sign_bias[VP56_FRAME_GOLDEN],
+            .sign_bias_alternate         = s->sign_bias[VP56_FRAME_GOLDEN2],
+
+            .mb_no_coeff_skip            = s->mbskip_enabled,
+            .loop_filter_disable         = s->filter.level == 0,
+        },
+
+        .prob_skip_false                 = s->prob->mbskip,
+        .prob_intra                      = s->prob->intra,
+        .prob_last                       = s->prob->last,
+        .prob_gf                         = s->prob->golden,
+    };
+
+    for (i = 0; i < 3; i++)
+        pp.mb_segment_tree_probs[i] = s->prob->segmentid[i];
+
+    for (i = 0; i < 4; i++) {
+        if (s->segmentation.enabled) {
+            pp.loop_filter_level[i] = s->segmentation.filter_level[i];
+            if (!s->segmentation.absolute_vals)
+                pp.loop_filter_level[i] += s->filter.level;
+        } else {
+            pp.loop_filter_level[i] = s->filter.level;
+        }
+        pp.loop_filter_level[i] = av_clip_uintp2(pp.loop_filter_level[i], 6);
+    }
+
+    for (i = 0; i < 4; i++) {
+        pp.loop_filter_deltas_ref_frame[i] = s->lf_delta.ref[i];
+        pp.loop_filter_deltas_mode[i] = s->lf_delta.mode[i + 4];
+    }
+
+    if (s->keyframe) {
+        static const uint8_t keyframe_y_mode_probs[4] = {
+            145, 156, 163, 128
+        };
+        static const uint8_t keyframe_uv_mode_probs[3] = {
+            142, 114, 183
+        };
+        memcpy(pp.y_mode_probs,  keyframe_y_mode_probs,  4);
+        memcpy(pp.uv_mode_probs, keyframe_uv_mode_probs, 3);
+    } else {
+        for (i = 0; i < 4; i++)
+            pp.y_mode_probs[i] = s->prob->pred16x16[i];
+        for (i = 0; i < 3; i++)
+            pp.uv_mode_probs[i] = s->prob->pred8x8c[i];
+    }
+    for (i = 0; i < 2; i++)
+        for (j = 0; j < 19; j++)
+            pp.mv_probs[i][j] = s->prob->mvc[i][j];
+
+    pp.bool_coder_ctx.range = s->coder_state_at_header_end.range;
+    pp.bool_coder_ctx.value = s->coder_state_at_header_end.value;
+    pp.bool_coder_ctx.count = s->coder_state_at_header_end.bit_count;
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAPictureParameterBufferType,
+                                            &pp, sizeof(pp));
+    if (err < 0)
+        goto fail;
+
+    for (i = 0; i < 4; i++) {
+        for (j = 0; j < 8; j++) {
+            static const int coeff_bands_inverse[8] = {
+                0, 1, 2, 3, 5, 6, 4, 15
+            };
+            int coeff_pos = coeff_bands_inverse[j];
+
+            for (k = 0; k < 3; k++) {
+                memcpy(prob.dct_coeff_probs[i][j][k],
+                       s->prob->token[i][coeff_pos][k], 11);
+            }
+        }
+    }
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAProbabilityBufferType,
+                                            &prob, sizeof(prob));
+    if (err < 0)
+        goto fail;
+
+    for (i = 0; i < 4; i++) {
+        int base_qi = s->segmentation.base_quant[i];
+        if (!s->segmentation.absolute_vals)
+            base_qi += s->quant.yac_qi;
+
+        quant.quantization_index[i][0] = av_clip_uintp2(base_qi,                       7);
+        quant.quantization_index[i][1] = av_clip_uintp2(base_qi + s->quant.ydc_delta,  7);
+        quant.quantization_index[i][2] = av_clip_uintp2(base_qi + s->quant.y2dc_delta, 7);
+        quant.quantization_index[i][3] = av_clip_uintp2(base_qi + s->quant.y2ac_delta, 7);
+        quant.quantization_index[i][4] = av_clip_uintp2(base_qi + s->quant.uvdc_delta, 7);
+        quant.quantization_index[i][5] = av_clip_uintp2(base_qi + s->quant.uvac_delta, 7);
+    }
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAIQMatrixBufferType,
+                                            &quant, sizeof(quant));
+    if (err < 0)
+        goto fail;
+
+    return 0;
+
+fail:
+    ff_vaapi_decode_cancel(avctx, pic);
+    return err;
+}
+
+static int vaapi_vp8_end_frame(AVCodecContext *avctx)
+{
+    const VP8Context *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->framep[VP56_FRAME_CURRENT]->hwaccel_picture_private;
+
+    return ff_vaapi_decode_issue(avctx, pic);
+}
+
+static int vaapi_vp8_decode_slice(AVCodecContext *avctx,
+                                  const uint8_t  *buffer,
+                                  uint32_t        size)
+{
+    const VP8Context *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->framep[VP56_FRAME_CURRENT]->hwaccel_picture_private;
+    VASliceParameterBufferVP8 sp;
+    int err, i;
+
+    unsigned int header_size = 3 + 7 * s->keyframe;
+    const uint8_t *data = buffer + header_size;
+    unsigned int data_size = size - header_size;
+
+    sp = (VASliceParameterBufferVP8) {
+        .slice_data_size   = data_size,
+        .slice_data_offset = 0,
+        .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
+
+        .macroblock_offset = (8 * (s->coder_state_at_header_end.input - data) -
+                              s->coder_state_at_header_end.bit_count - 8),
+        .num_of_partitions = s->num_coeff_partitions + 1,
+    };
+
+    sp.partition_size[0] = s->header_partition_size - ((sp.macroblock_offset + 7) / 8);
+    for (i = 0; i < 8; i++)
+        sp.partition_size[i+1] = s->coeff_partition_size[i];
+
+    err = ff_vaapi_decode_make_slice_buffer(avctx, pic, &sp, sizeof(sp), data, data_size);
+    if (err)
+        goto fail;
+
+    return 0;
+
+fail:
+    ff_vaapi_decode_cancel(avctx, pic);
+    return err;
+}
+
+AVHWAccel ff_vp8_vaapi_hwaccel = {
+    .name                 = "vp8_vaapi",
+    .type                 = AVMEDIA_TYPE_VIDEO,
+    .id                   = AV_CODEC_ID_VP8,
+    .pix_fmt              = AV_PIX_FMT_VAAPI,
+    .start_frame          = &vaapi_vp8_start_frame,
+    .end_frame            = &vaapi_vp8_end_frame,
+    .decode_slice         = &vaapi_vp8_decode_slice,
+    .frame_priv_data_size = sizeof(VAAPIDecodePicture),
+    .init                 = &ff_vaapi_decode_init,
+    .uninit               = &ff_vaapi_decode_uninit,
+    .priv_data_size       = sizeof(VAAPIDecodeContext),
+};