[Mesa-dev] [PATCH] vl: use a separate context for shader based decode

Aaron Watry awatry at gmail.com
Wed Nov 6 08:07:03 PST 2013


On Wed, Nov 6, 2013 at 8:13 AM, Christian König <deathsimple at vodafone.de> wrote:
> From: Christian König <christian.koenig at amd.com>
>
> This makes VDPAU thread save again.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>  src/gallium/auxiliary/vl/vl_mpeg12_decoder.c | 180 ++++++++++++++++++---------
>  src/gallium/auxiliary/vl/vl_mpeg12_decoder.h |   1 +
>  2 files changed, 120 insertions(+), 61 deletions(-)
>
> diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
> index ca4eb3e..3777174 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
> @@ -82,6 +82,63 @@ static const unsigned const_empty_block_mask_420[3][2][2] = {
>     { { 0x01, 0x01 },  { 0x01, 0x01 } }
>  };
>
> +struct video_buffer_private
> +{
> +   struct pipe_sampler_view *sampler_view_planes[VL_NUM_COMPONENTS];
> +   struct pipe_surface      *surfaces[VL_MAX_SURFACES];
> +
> +   struct vl_mpeg12_buffer *buffer;
> +};
> +
> +static void
> +vl_mpeg12_destroy_buffer(struct vl_mpeg12_buffer *buf);
> +
> +static void
> +destroy_video_buffer_private(void *private)
> +{
> +   struct video_buffer_private *priv = private;
> +   unsigned i;
> +
> +   for (i = 0; i < VL_NUM_COMPONENTS; ++i)
> +      pipe_sampler_view_reference(&priv->sampler_view_planes[i], NULL);
> +
> +   for (i = 0; i < VL_MAX_SURFACES; ++i)
> +      pipe_surface_reference(&priv->surfaces[i], NULL);
> +
> +   if (priv->buffer)
> +      vl_mpeg12_destroy_buffer(priv->buffer);

Should we be freeing priv/private at the end here, or is this struct
still in use elsewhere?
I'm assuming that it's unused, given that this is the matching
destructor for get_video_buffer_private
where the struct is CALLOC'd.

I'm not too qualified to give a full review of this patch, but I had
memory leaks on my mind after some stuff I was working on last night.
I didn't see any others besides the one in my first email and this
one. I haven't run this through valgrind, so for the moment it's just
me looking for stuff that's fishy.

--Aaron

> +}
> +
> +static struct video_buffer_private *
> +get_video_buffer_private(struct vl_mpeg12_decoder *dec, struct pipe_video_buffer *buf)
> +{
> +   struct pipe_context *pipe = dec->context;
> +   struct video_buffer_private *priv;
> +   struct pipe_sampler_view **sv;
> +   struct pipe_surface **surf;
> +   unsigned i;
> +
> +   priv = vl_video_buffer_get_associated_data(buf, &dec->base);
> +   if (priv)
> +      return priv;
> +
> +   priv = CALLOC_STRUCT(video_buffer_private);
> +
> +   sv = buf->get_sampler_view_planes(buf);
> +   for (i = 0; i < VL_NUM_COMPONENTS; ++i)
> +      if (sv[i])
> +         priv->sampler_view_planes[i] = pipe->create_sampler_view(pipe, sv[i]->texture, sv[i]);
> +
> +   surf = buf->get_surfaces(buf);
> +   for (i = 0; i < VL_MAX_SURFACES; ++i)
> +      if (surf[i])
> +         priv->surfaces[i] = pipe->create_surface(pipe, surf[i]->texture, surf[i]);
> +
> +   vl_video_buffer_set_associated_data(buf, &dec->base, priv, destroy_video_buffer_private);
> +
> +   return priv;
> +}
> +
>  static bool
>  init_zscan_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buffer)
>  {
> @@ -103,7 +160,7 @@ init_zscan_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buffer
>     res_tmpl.usage = PIPE_USAGE_STREAM;
>     res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
>
> -   res = dec->base.context->screen->resource_create(dec->base.context->screen, &res_tmpl);
> +   res = dec->context->screen->resource_create(dec->context->screen, &res_tmpl);
>     if (!res)
>        goto error_source;
>
> @@ -111,7 +168,7 @@ init_zscan_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buffer
>     memset(&sv_tmpl, 0, sizeof(sv_tmpl));
>     u_sampler_view_default_template(&sv_tmpl, res, res->format);
>     sv_tmpl.swizzle_r = sv_tmpl.swizzle_g = sv_tmpl.swizzle_b = sv_tmpl.swizzle_a = PIPE_SWIZZLE_RED;
> -   buffer->zscan_source = dec->base.context->create_sampler_view(dec->base.context, res, &sv_tmpl);
> +   buffer->zscan_source = dec->context->create_sampler_view(dec->context, res, &sv_tmpl);
>     pipe_resource_reference(&res, NULL);
>     if (!buffer->zscan_source)
>        goto error_sampler;
> @@ -384,9 +441,8 @@ UploadYcbcrBlocks(struct vl_mpeg12_decoder *dec,
>  }
>
>  static void
> -vl_mpeg12_destroy_buffer(void *buffer)
> +vl_mpeg12_destroy_buffer(struct vl_mpeg12_buffer *buf)
>  {
> -   struct vl_mpeg12_buffer *buf = buffer;
>
>     assert(buf);
>
> @@ -407,11 +463,11 @@ vl_mpeg12_destroy(struct pipe_video_codec *decoder)
>     assert(decoder);
>
>     /* Asserted in softpipe_delete_fs_state() for some reason */
> -   dec->base.context->bind_vs_state(dec->base.context, NULL);
> -   dec->base.context->bind_fs_state(dec->base.context, NULL);
> +   dec->context->bind_vs_state(dec->context, NULL);
> +   dec->context->bind_fs_state(dec->context, NULL);
>
> -   dec->base.context->delete_depth_stencil_alpha_state(dec->base.context, dec->dsa);
> -   dec->base.context->delete_sampler_state(dec->base.context, dec->sampler_ycbcr);
> +   dec->context->delete_depth_stencil_alpha_state(dec->context, dec->dsa);
> +   dec->context->delete_sampler_state(dec->context, dec->sampler_ycbcr);
>
>     vl_mc_cleanup(&dec->mc_y);
>     vl_mc_cleanup(&dec->mc_c);
> @@ -426,8 +482,8 @@ vl_mpeg12_destroy(struct pipe_video_codec *decoder)
>     vl_zscan_cleanup(&dec->zscan_y);
>     vl_zscan_cleanup(&dec->zscan_c);
>
> -   dec->base.context->delete_vertex_elements_state(dec->base.context, dec->ves_ycbcr);
> -   dec->base.context->delete_vertex_elements_state(dec->base.context, dec->ves_mv);
> +   dec->context->delete_vertex_elements_state(dec->context, dec->ves_ycbcr);
> +   dec->context->delete_vertex_elements_state(dec->context, dec->ves_mv);
>
>     pipe_resource_reference(&dec->quads.buffer, NULL);
>     pipe_resource_reference(&dec->pos.buffer, NULL);
> @@ -446,13 +502,14 @@ vl_mpeg12_destroy(struct pipe_video_codec *decoder)
>  static struct vl_mpeg12_buffer *
>  vl_mpeg12_get_decode_buffer(struct vl_mpeg12_decoder *dec, struct pipe_video_buffer *target)
>  {
> +   struct video_buffer_private *priv;
>     struct vl_mpeg12_buffer *buffer;
>
>     assert(dec);
>
> -   buffer = vl_video_buffer_get_associated_data(target, &dec->base);
> -   if (buffer)
> -      return buffer;
> +   priv = get_video_buffer_private(dec, target);
> +   if (priv->buffer)
> +      return priv->buffer;
>
>     buffer = dec->dec_buffers[dec->current_buffer];
>     if (buffer)
> @@ -462,7 +519,7 @@ vl_mpeg12_get_decode_buffer(struct vl_mpeg12_decoder *dec, struct pipe_video_buf
>     if (buffer == NULL)
>        return NULL;
>
> -   if (!vl_vb_init(&buffer->vertex_stream, dec->base.context,
> +   if (!vl_vb_init(&buffer->vertex_stream, dec->context,
>                     dec->base.width / VL_MACROBLOCK_WIDTH,
>                     dec->base.height / VL_MACROBLOCK_HEIGHT))
>        goto error_vertex_buffer;
> @@ -481,8 +538,7 @@ vl_mpeg12_get_decode_buffer(struct vl_mpeg12_decoder *dec, struct pipe_video_buf
>        vl_mpg12_bs_init(&buffer->bs, &dec->base);
>
>     if (dec->base.expect_chunked_decode)
> -      vl_video_buffer_set_associated_data(target, &dec->base,
> -                                          buffer, vl_mpeg12_destroy_buffer);
> +      priv->buffer = buffer;
>     else
>        dec->dec_buffers[dec->current_buffer] = buffer;
>
> @@ -539,17 +595,17 @@ vl_mpeg12_begin_frame(struct pipe_video_codec *decoder,
>        vl_zscan_upload_quant(zscan, &buf->zscan[i], non_intra_matrix, false);
>     }
>
> -   vl_vb_map(&buf->vertex_stream, dec->base.context);
> +   vl_vb_map(&buf->vertex_stream, dec->context);
>
>     tex = buf->zscan_source->texture;
>     rect.width = tex->width0;
>     rect.height = tex->height0;
>
>     buf->texels =
> -      dec->base.context->transfer_map(dec->base.context, tex, 0,
> -                                      PIPE_TRANSFER_WRITE |
> -                                      PIPE_TRANSFER_DISCARD_RANGE,
> -                                      &rect, &buf->tex_transfer);
> +      dec->context->transfer_map(dec->context, tex, 0,
> +                                 PIPE_TRANSFER_WRITE |
> +                                 PIPE_TRANSFER_DISCARD_RANGE,
> +                                 &rect, &buf->tex_transfer);
>
>     buf->block_num = 0;
>
> @@ -685,23 +741,23 @@ vl_mpeg12_end_frame(struct pipe_video_codec *decoder,
>
>     buf = vl_mpeg12_get_decode_buffer(dec, target);
>
> -   vl_vb_unmap(&buf->vertex_stream, dec->base.context);
> +   vl_vb_unmap(&buf->vertex_stream, dec->context);
>
> -   dec->base.context->transfer_unmap(dec->base.context, buf->tex_transfer);
> +   dec->context->transfer_unmap(dec->context, buf->tex_transfer);
>
>     vb[0] = dec->quads;
>     vb[1] = dec->pos;
>
> -   target_surfaces = target->get_surfaces(target);
> +   target_surfaces = get_video_buffer_private(dec, target)->surfaces;
>
>     for (i = 0; i < VL_MAX_REF_FRAMES; ++i) {
>        if (desc->ref[i])
> -         ref_frames[i] = desc->ref[i]->get_sampler_view_planes(desc->ref[i]);
> +         ref_frames[i] = get_video_buffer_private(dec, desc->ref[i])->sampler_view_planes;
>        else
>           ref_frames[i] = NULL;
>     }
>
> -   dec->base.context->bind_vertex_elements_state(dec->base.context, dec->ves_mv);
> +   dec->context->bind_vertex_elements_state(dec->context, dec->ves_mv);
>     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
>        if (!target_surfaces[i]) continue;
>
> @@ -711,18 +767,18 @@ vl_mpeg12_end_frame(struct pipe_video_codec *decoder,
>           if (!ref_frames[j] || !ref_frames[j][i]) continue;
>
>           vb[2] = vl_vb_get_mv(&buf->vertex_stream, j);;
> -         dec->base.context->set_vertex_buffers(dec->base.context, 0, 3, vb);
> +         dec->context->set_vertex_buffers(dec->context, 0, 3, vb);
>
>           vl_mc_render_ref(i ? &dec->mc_c : &dec->mc_y, &buf->mc[i], ref_frames[j][i]);
>        }
>     }
>
> -   dec->base.context->bind_vertex_elements_state(dec->base.context, dec->ves_ycbcr);
> +   dec->context->bind_vertex_elements_state(dec->context, dec->ves_ycbcr);
>     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
>        if (!buf->num_ycbcr_blocks[i]) continue;
>
>        vb[1] = vl_vb_get_ycbcr(&buf->vertex_stream, i);
> -      dec->base.context->set_vertex_buffers(dec->base.context, 0, 2, vb);
> +      dec->context->set_vertex_buffers(dec->context, 0, 2, vb);
>
>        vl_zscan_render(i ? &dec->zscan_c : & dec->zscan_y, &buf->zscan[i] , buf->num_ycbcr_blocks[i]);
>
> @@ -741,21 +797,22 @@ vl_mpeg12_end_frame(struct pipe_video_codec *decoder,
>           if (!buf->num_ycbcr_blocks[plane]) continue;
>
>           vb[1] = vl_vb_get_ycbcr(&buf->vertex_stream, plane);
> -         dec->base.context->set_vertex_buffers(dec->base.context, 0, 2, vb);
> +         dec->context->set_vertex_buffers(dec->context, 0, 2, vb);
>
>           if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT)
>              vl_idct_prepare_stage2(i ? &dec->idct_c : &dec->idct_y, &buf->idct[plane]);
>           else {
> -            dec->base.context->set_sampler_views(dec->base.context,
> -                                                 PIPE_SHADER_FRAGMENT, 0, 1,
> -                                                 &mc_source_sv[plane]);
> -            dec->base.context->bind_sampler_states(dec->base.context,
> -                                                   PIPE_SHADER_FRAGMENT,
> -                                                   0, 1, &dec->sampler_ycbcr);
> +            dec->context->set_sampler_views(dec->context,
> +                                            PIPE_SHADER_FRAGMENT, 0, 1,
> +                                            &mc_source_sv[plane]);
> +            dec->context->bind_sampler_states(dec->context,
> +                                              PIPE_SHADER_FRAGMENT,
> +                                              0, 1, &dec->sampler_ycbcr);
>           }
>           vl_mc_render_ycbcr(i ? &dec->mc_c : &dec->mc_y, &buf->mc[i], j, buf->num_ycbcr_blocks[plane]);
>        }
>     }
> +   dec->context->flush(dec->context, NULL, 0);
>     ++dec->current_buffer;
>     dec->current_buffer %= 4;
>  }
> @@ -793,8 +850,8 @@ init_pipe_state(struct vl_mpeg12_decoder *dec)
>     dsa.alpha.enabled = 0;
>     dsa.alpha.func = PIPE_FUNC_ALWAYS;
>     dsa.alpha.ref_value = 0;
> -   dec->dsa = dec->base.context->create_depth_stencil_alpha_state(dec->base.context, &dsa);
> -   dec->base.context->bind_depth_stencil_alpha_state(dec->base.context, dec->dsa);
> +   dec->dsa = dec->context->create_depth_stencil_alpha_state(dec->context, &dsa);
> +   dec->context->bind_depth_stencil_alpha_state(dec->context, dec->dsa);
>
>     memset(&sampler, 0, sizeof(sampler));
>     sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
> @@ -806,7 +863,7 @@ init_pipe_state(struct vl_mpeg12_decoder *dec)
>     sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
>     sampler.compare_func = PIPE_FUNC_ALWAYS;
>     sampler.normalized_coords = 1;
> -   dec->sampler_ycbcr = dec->base.context->create_sampler_state(dec->base.context, &sampler);
> +   dec->sampler_ycbcr = dec->context->create_sampler_state(dec->context, &sampler);
>     if (!dec->sampler_ycbcr)
>        return false;
>
> @@ -821,7 +878,7 @@ find_format_config(struct vl_mpeg12_decoder *dec, const struct format_config con
>
>     assert(dec);
>
> -   screen = dec->base.context->screen;
> +   screen = dec->context->screen;
>
>     for (i = 0; i < num_configs; ++i) {
>        if (!screen->is_format_supported(screen, configs[i].zscan_source_format, PIPE_TEXTURE_2D,
> @@ -855,17 +912,17 @@ init_zscan(struct vl_mpeg12_decoder *dec, const struct format_config* format_con
>     assert(dec);
>
>     dec->zscan_source_format = format_config->zscan_source_format;
> -   dec->zscan_linear = vl_zscan_layout(dec->base.context, vl_zscan_linear, dec->blocks_per_line);
> -   dec->zscan_normal = vl_zscan_layout(dec->base.context, vl_zscan_normal, dec->blocks_per_line);
> -   dec->zscan_alternate = vl_zscan_layout(dec->base.context, vl_zscan_alternate, dec->blocks_per_line);
> +   dec->zscan_linear = vl_zscan_layout(dec->context, vl_zscan_linear, dec->blocks_per_line);
> +   dec->zscan_normal = vl_zscan_layout(dec->context, vl_zscan_normal, dec->blocks_per_line);
> +   dec->zscan_alternate = vl_zscan_layout(dec->context, vl_zscan_alternate, dec->blocks_per_line);
>
>     num_channels = dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT ? 4 : 1;
>
> -   if (!vl_zscan_init(&dec->zscan_y, dec->base.context, dec->base.width, dec->base.height,
> +   if (!vl_zscan_init(&dec->zscan_y, dec->context, dec->base.width, dec->base.height,
>                        dec->blocks_per_line, dec->num_blocks, num_channels))
>        return false;
>
> -   if (!vl_zscan_init(&dec->zscan_c, dec->base.context, dec->chroma_width, dec->chroma_height,
> +   if (!vl_zscan_init(&dec->zscan_c, dec->context, dec->chroma_width, dec->chroma_height,
>                        dec->blocks_per_line, dec->num_blocks, num_channels))
>        return false;
>
> @@ -881,14 +938,14 @@ init_idct(struct vl_mpeg12_decoder *dec, const struct format_config* format_conf
>
>     struct pipe_sampler_view *matrix = NULL;
>
> -   nr_of_idct_render_targets = dec->base.context->screen->get_param
> +   nr_of_idct_render_targets = dec->context->screen->get_param
>     (
> -      dec->base.context->screen, PIPE_CAP_MAX_RENDER_TARGETS
> +      dec->context->screen, PIPE_CAP_MAX_RENDER_TARGETS
>     );
>
> -   max_inst = dec->base.context->screen->get_shader_param
> +   max_inst = dec->context->screen->get_shader_param
>     (
> -      dec->base.context->screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
> +      dec->context->screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
>     );
>
>     // Just assume we need 32 inst per render target, not 100% true, but should work in most cases
> @@ -905,7 +962,7 @@ init_idct(struct vl_mpeg12_decoder *dec, const struct format_config* format_conf
>     templat.chroma_format = dec->base.chroma_format;
>     dec->idct_source = vl_video_buffer_create_ex
>     (
> -      dec->base.context, &templat,
> +      dec->context, &templat,
>        formats, 1, 1, PIPE_USAGE_STATIC
>     );
>
> @@ -919,21 +976,21 @@ init_idct(struct vl_mpeg12_decoder *dec, const struct format_config* format_conf
>     templat.chroma_format = dec->base.chroma_format;
>     dec->mc_source = vl_video_buffer_create_ex
>     (
> -      dec->base.context, &templat,
> +      dec->context, &templat,
>        formats, nr_of_idct_render_targets, 1, PIPE_USAGE_STATIC
>     );
>
>     if (!dec->mc_source)
>        goto error_mc_source;
>
> -   if (!(matrix = vl_idct_upload_matrix(dec->base.context, format_config->idct_scale)))
> +   if (!(matrix = vl_idct_upload_matrix(dec->context, format_config->idct_scale)))
>        goto error_matrix;
>
> -   if (!vl_idct_init(&dec->idct_y, dec->base.context, dec->base.width, dec->base.height,
> +   if (!vl_idct_init(&dec->idct_y, dec->context, dec->base.width, dec->base.height,
>                       nr_of_idct_render_targets, matrix, matrix))
>        goto error_y;
>
> -   if(!vl_idct_init(&dec->idct_c, dec->base.context, dec->chroma_width, dec->chroma_height,
> +   if(!vl_idct_init(&dec->idct_c, dec->context, dec->chroma_width, dec->chroma_height,
>                      nr_of_idct_render_targets, matrix, matrix))
>        goto error_c;
>
> @@ -970,7 +1027,7 @@ init_mc_source_widthout_idct(struct vl_mpeg12_decoder *dec, const struct format_
>     templat.chroma_format = dec->base.chroma_format;
>     dec->mc_source = vl_video_buffer_create_ex
>     (
> -      dec->base.context, &templat,
> +      dec->context, &templat,
>        formats, 1, 1, PIPE_USAGE_STATIC
>     );
>
> @@ -1037,6 +1094,7 @@ vl_create_mpeg12_decoder(struct pipe_context *context,
>
>     dec->base = *templat;
>     dec->base.context = context;
> +   dec->context = context->screen->context_create(context->screen, NULL);
>
>     dec->base.destroy = vl_mpeg12_destroy;
>     dec->base.begin_frame = vl_mpeg12_begin_frame;
> @@ -1066,15 +1124,15 @@ vl_create_mpeg12_decoder(struct pipe_context *context,
>        dec->num_blocks = dec->num_blocks * 3;
>     }
>
> -   dec->quads = vl_vb_upload_quads(dec->base.context);
> +   dec->quads = vl_vb_upload_quads(dec->context);
>     dec->pos = vl_vb_upload_pos(
> -      dec->base.context,
> +      dec->context,
>        dec->base.width / VL_MACROBLOCK_WIDTH,
>        dec->base.height / VL_MACROBLOCK_HEIGHT
>     );
>
> -   dec->ves_ycbcr = vl_vb_get_ves_ycbcr(dec->base.context);
> -   dec->ves_mv = vl_vb_get_ves_mv(dec->base.context);
> +   dec->ves_ycbcr = vl_vb_get_ves_ycbcr(dec->context);
> +   dec->ves_mv = vl_vb_get_ves_mv(dec->context);
>
>     switch (templat->entrypoint) {
>     case PIPE_VIDEO_ENTRYPOINT_BITSTREAM:
> @@ -1111,13 +1169,13 @@ vl_create_mpeg12_decoder(struct pipe_context *context,
>           goto error_sources;
>     }
>
> -   if (!vl_mc_init(&dec->mc_y, dec->base.context, dec->base.width, dec->base.height,
> +   if (!vl_mc_init(&dec->mc_y, dec->context, dec->base.width, dec->base.height,
>                     VL_MACROBLOCK_HEIGHT, format_config->mc_scale,
>                     mc_vert_shader_callback, mc_frag_shader_callback, dec))
>        goto error_mc_y;
>
>     // TODO
> -   if (!vl_mc_init(&dec->mc_c, dec->base.context, dec->base.width, dec->base.height,
> +   if (!vl_mc_init(&dec->mc_c, dec->context, dec->base.width, dec->base.height,
>                     VL_BLOCK_HEIGHT, format_config->mc_scale,
>                     mc_vert_shader_callback, mc_frag_shader_callback, dec))
>        goto error_mc_c;
> diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> index c7fe5e6..b357d8b 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> @@ -44,6 +44,7 @@ struct pipe_context;
>  struct vl_mpeg12_decoder
>  {
>     struct pipe_video_codec base;
> +   struct pipe_context *context;
>
>     unsigned chroma_width, chroma_height;
>
> --
> 1.8.1.2
>
> _______________________________________________
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