[FFmpeg-devel] [PATCH] lavc: Make hardware config method support more explicit for hwaccels

[Mark Thompson]

From: Thomas Guillem <thomas at gllm.fr>

This fixes the use of old ad-hoc methods which are still supported by some
hwaccels which also support newer methods (DXVA2, VAAPI, VDPAU,
videotoolbox) - without the method being visible here, ff_get_format()
would refuse to use it.

Signed-off-by: Mark Thompson <sw at jkqxz.net>
---
On 07/12/17 12:25, Thomas Guillem wrote:
> Add a boolean to specify if an API can work with
> AV_CODEC_HW_CONFIG_METHOD_AD_HOC.
> ---
>  libavcodec/hwaccel.h | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/libavcodec/hwaccel.h b/libavcodec/hwaccel.h
> index ae55527c2f..16ee822920 100644
> --- a/libavcodec/hwaccel.h
> +++ b/libavcodec/hwaccel.h
> @@ -42,12 +42,13 @@ typedef struct AVCodecHWConfigInternal {
>  
>  // These macros are used to simplify AVCodecHWConfigInternal definitions.
>  
> -#define HW_CONFIG_HWACCEL(format, device, name) \
> +#define HW_CONFIG_HWACCEL(format, ad_hoc, device, name) \
>      &(const AVCodecHWConfigInternal) { \
>          .public          = { \
>              .pix_fmt     = AV_PIX_FMT_ ## format, \
>              .methods     = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX | \
> -                           AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, \
> +                           AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX | \
> +                           ad_hoc ? AV_CODEC_HW_CONFIG_METHOD_AD_HOC : 0, \
>              .device_type = AV_HWDEVICE_TYPE_ ## device, \
>          }, \
>          .hwaccel         = &name, \

Once we're having extra arguments in the macros like that I think I would prefer all the methods to be specified explicitly (which conveniently also lets us delete the second macro).

How about this?

Thanks,

- Mark


 libavcodec/hwaccel.h | 36 +++++++++++++-----------------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/libavcodec/hwaccel.h b/libavcodec/hwaccel.h
index ae55527c2f..3aaa92571c 100644
--- a/libavcodec/hwaccel.h
+++ b/libavcodec/hwaccel.h
@@ -42,13 +42,14 @@ typedef struct AVCodecHWConfigInternal {
 
 // These macros are used to simplify AVCodecHWConfigInternal definitions.
 
-#define HW_CONFIG_HWACCEL(format, device, name) \
+#define HW_CONFIG_HWACCEL(device, frames, ad_hoc, format, device_type_, name) \
     &(const AVCodecHWConfigInternal) { \
         .public          = { \
             .pix_fmt     = AV_PIX_FMT_ ## format, \
-            .methods     = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX | \
-                           AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, \
-            .device_type = AV_HWDEVICE_TYPE_ ## device, \
+            .methods     = (device ? AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX : 0) | \
+                           (frames ? AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX : 0) | \
+                           (ad_hoc ? AV_CODEC_HW_CONFIG_METHOD_AD_HOC        : 0),  \
+            .device_type = AV_HWDEVICE_TYPE_ ## device_type_, \
         }, \
         .hwaccel         = &name, \
     }
@@ -63,32 +64,21 @@ typedef struct AVCodecHWConfigInternal {
         .hwaccel         = NULL, \
     }
 
-#define HW_CONFIG_AD_HOC_HWACCEL(format, name) \
-    &(const AVCodecHWConfigInternal) { \
-        .public =      { \
-            .pix_fmt     = AV_PIX_FMT_ ## format, \
-            .methods     = AV_CODEC_HW_CONFIG_METHOD_AD_HOC, \
-            .device_type = AV_HWDEVICE_TYPE_NONE, \
-        }, \
-        .hwaccel = &name, \
-    }
-
 #define HWACCEL_DXVA2(codec) \
-    HW_CONFIG_HWACCEL(DXVA2_VLD, DXVA2,   ff_ ## codec ## _dxva2_hwaccel)
+    HW_CONFIG_HWACCEL(1, 1, 1, DXVA2_VLD,    DXVA2,        ff_ ## codec ## _dxva2_hwaccel)
 #define HWACCEL_D3D11VA2(codec) \
-    HW_CONFIG_HWACCEL(D3D11,     D3D11VA, ff_ ## codec ## _d3d11va2_hwaccel)
+    HW_CONFIG_HWACCEL(1, 1, 0, D3D11,        D3D11VA,      ff_ ## codec ## _d3d11va2_hwaccel)
 #define HWACCEL_NVDEC(codec) \
-    HW_CONFIG_HWACCEL(CUDA,      CUDA,    ff_ ## codec ## _nvdec_hwaccel)
+    HW_CONFIG_HWACCEL(1, 1, 0, CUDA,         CUDA,         ff_ ## codec ## _nvdec_hwaccel)
 #define HWACCEL_VAAPI(codec) \
-    HW_CONFIG_HWACCEL(VAAPI,     VAAPI,   ff_ ## codec ## _vaapi_hwaccel)
+    HW_CONFIG_HWACCEL(1, 1, 1, VAAPI,        VAAPI,        ff_ ## codec ## _vaapi_hwaccel)
 #define HWACCEL_VDPAU(codec) \
-    HW_CONFIG_HWACCEL(VDPAU,     VDPAU,   ff_ ## codec ## _vdpau_hwaccel)
+    HW_CONFIG_HWACCEL(1, 1, 1, VDPAU,        VDPAU,        ff_ ## codec ## _vdpau_hwaccel)
 #define HWACCEL_VIDEOTOOLBOX(codec) \
-    HW_CONFIG_HWACCEL(VIDEOTOOLBOX, VIDEOTOOLBOX, ff_ ## codec ## _videotoolbox_hwaccel)
-
+    HW_CONFIG_HWACCEL(1, 1, 1, VIDEOTOOLBOX, VIDEOTOOLBOX, ff_ ## codec ## _videotoolbox_hwaccel)
 #define HWACCEL_D3D11VA(codec) \
-    HW_CONFIG_AD_HOC_HWACCEL(D3D11VA_VLD, ff_ ## codec ## _d3d11va_hwaccel)
+    HW_CONFIG_HWACCEL(0, 0, 1, D3D11VA_VLD,  NONE,         ff_ ## codec ## _d3d11va_hwaccel)
 #define HWACCEL_XVMC(codec) \
-    HW_CONFIG_AD_HOC_HWACCEL(XVMC,        ff_ ## codec ## _xvmc_hwaccel)
+    HW_CONFIG_HWACCEL(0, 0, 1, XVMC,         NONE,         ff_ ## codec ## _xvmc_hwaccel)
 
 #endif /* AVCODEC_HWACCEL_H */
-- 
2.11.0