From 0a81fe1cf9e62c26ebda1c209b3b69467991b252 Mon Sep 17 00:00:00 2001
From: Philip Langdale <philipl@overt.org>
Date: Sun, 9 Oct 2016 09:18:14 -0700
Subject: vd_lavc: Add hwdec wrapper for crystalhd

This hardware decodes to system memory so it only requires a wrapper.
---
 DOCS/man/options.rst   | 6 ++++++
 options/options.c      | 1 +
 video/decode/vd_lavc.c | 7 +++++++
 video/hwdec.h          | 1 +
 4 files changed, 15 insertions(+)

diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index d17aefe347..374cdaf1a5 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -625,6 +625,7 @@ Video
     :rpi-copy:  copies video back to system RAM (Raspberry Pi only)
     :cuda:      requires ``--vo=opengl`` (Any platform CUDA is available)
     :cuda-copy: copies video back to system RAM (Any platform CUDA is available)
+    :crystalhd: copies video back to system RAM (Any platform supported by hardware)
 
     ``auto`` tries to automatically enable hardware decoding using the first
     available method. This still depends what VO you are using. For example,
@@ -711,6 +712,11 @@ Video
         ``rpi`` always uses the hardware overlay renderer, even with
         ``--vo=opengl``.
 
+        ``crystalhd`` is not safe. It always converts to 4:2:2 YUV, which
+        may be lossy, depending on how chroma sub-sampling is done during
+        conversion. It also discards the top left pixel of each frame for
+        some reason.
+
         All other methods, in particular the copy-back methods (like
         ``dxva2-copy`` etc.) are either fully safe, or not worse than software
         decoding.
diff --git a/options/options.c b/options/options.c
index 38f5d16721..3b071e3b47 100644
--- a/options/options.c
+++ b/options/options.c
@@ -106,6 +106,7 @@ const struct m_opt_choice_alternatives mp_hwdec_names[] = {
     {"mediacodec",  HWDEC_MEDIACODEC},
     {"cuda",        HWDEC_CUDA},
     {"cuda-copy",   HWDEC_CUDA_COPY},
+    {"crystalhd",   HWDEC_CRYSTALHD},
     {0}
 };
 
diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index ed1ba6b6dc..86cf815320 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -164,6 +164,12 @@ static const struct vd_lavc_hwdec mp_vd_lavc_cuda_copy = {
 };
 #endif
 
+static const struct vd_lavc_hwdec mp_vd_lavc_crystalhd = {
+    .type = HWDEC_CRYSTALHD,
+    .lavc_suffix = "_crystalhd",
+    .copying = true,
+};
+
 static const struct vd_lavc_hwdec *const hwdec_list[] = {
 #if HAVE_RPI
     &mp_vd_lavc_rpi,
@@ -193,6 +199,7 @@ static const struct vd_lavc_hwdec *const hwdec_list[] = {
     &mp_vd_lavc_cuda,
     &mp_vd_lavc_cuda_copy,
 #endif
+    &mp_vd_lavc_crystalhd,
     NULL
 };
 
diff --git a/video/hwdec.h b/video/hwdec.h
index fd99043c10..34b65fe15c 100644
--- a/video/hwdec.h
+++ b/video/hwdec.h
@@ -24,6 +24,7 @@ enum hwdec_type {
     HWDEC_MEDIACODEC,
     HWDEC_CUDA,
     HWDEC_CUDA_COPY,
+    HWDEC_CRYSTALHD,
 };
 
 #define HWDEC_IS_AUTO(x) ((x) == HWDEC_AUTO || (x) == HWDEC_AUTO_COPY)
-- 
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