---
doc/APIchanges | 3 +++
libavcodec/avcodec.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/hwaccel.h | 18 +++++++++++++
libavcodec/utils.c | 12 +++++++++
4 files changed, 107 insertions(+)
diff --git a/doc/APIchanges b/doc/APIchanges
index 9f3a1f246..490c71cc2 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -13,6 +13,9 @@ libavutil: 2017-03-23
API changes, most recent first:
+2017-xx-xx - xxxxxxx - lavc 58.x+1.0 - avcodec.h
+ Add AVCodecHWConfig and avcodec_get_hw_config().
+
2017-xx-xx - xxxxxxx - lavc 58.5.0 - avcodec.h
Add avcodec_get_hw_frames_parameters().
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 562483502..5d7b3459c 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -35,6 +35,7 @@
#include "libavutil/cpu.h"
#include "libavutil/dict.h"
#include "libavutil/frame.h"
+#include "libavutil/hwcontext.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
@@ -2735,6 +2736,61 @@ typedef struct AVProfile {
const char *name; ///< short name for the profile
} AVProfile;
+enum {
+ /**
+ * The codec supports this format via the hw_device_ctx interface.
+ *
+ * When selecting this format, AVCodecContext.hw_device_ctx should
+ * have been set to a device of the specified type before calling
+ * avcodec_open2().
+ */
+ AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX = 0x01,
+ /**
+ * The codec supports this format via the hw_frames_ctx interface.
+ *
+ * When selecting this format for a decoder,
+ * AVCodecContext.hw_frames_ctx should be set to a suitable frames
+ * context inside the get_format() callback. The frames context
+ * must have been created on a device of the specified type.
+ */
+ AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX = 0x02,
+ /**
+ * The codec supports this format by some internal method.
+ *
+ * This format can be selected without any additional configuration -
+ * no device or frames context is required.
+ */
+ AV_CODEC_HW_CONFIG_METHOD_INTERNAL = 0x04,
+ /**
+ * The codec supports this format by some ad-hoc method.
+ *
+ * Additional settings and/or function calls are required. See the
+ * codec-specific documentation for details. (Methods requiring
+ * this sort of configuration are deprecated and others should be
+ * used in preference.)
+ */
+ AV_CODEC_HW_CONFIG_METHOD_AD_HOC = 0x08,
+};
+
+typedef struct AVCodecHWConfig {
+ /**
+ * A hardware pixel format which the codec can use.
+ */
+ enum AVPixelFormat pix_fmt;
+ /**
+ * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
+ * setup methods which can be used with this configuration.
+ */
+ int methods;
+ /**
+ * The device type associated with the configuration.
+ *
+ * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
+ * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
+ */
+ enum AVHWDeviceType device_type;
+} AVCodecHWConfig;
+
typedef struct AVCodecDefault AVCodecDefault;
struct AVSubtitle;
@@ -2859,9 +2915,27 @@ typedef struct AVCodec {
* packets before decoding.
*/
const char *bsfs;
+
+ /**
+ * Array of pointers to hardware configurations supported by the codec,
+ * or NULL if no hardware supported. The array is terminated by a NULL
+ * pointer.
+ *
+ * The user can only access this field via avcodec_get_hw_config().
+ */
+ const struct AVCodecHWConfigInternal **hw_configs;
} AVCodec;
/**
+ * Retrieve supported hardware configurations for a codec.
+ *
+ * Values of index from zero to some maximum return the indexed configuration
+ * descriptor; all other values return NULL. If the codec does not support
+ * any hardware configurations then it will always return NULL.
+ */
+const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
+
+/**
* @defgroup lavc_hwaccel AVHWAccel
* @{
*/
diff --git a/libavcodec/hwaccel.h b/libavcodec/hwaccel.h
index 60dbe81c8..b6d566248 100644
--- a/libavcodec/hwaccel.h
+++ b/libavcodec/hwaccel.h
@@ -19,6 +19,24 @@
#ifndef AVCODEC_HWACCEL_H
#define AVCODEC_HWACCEL_H
+#include "avcodec.h"
+
+
#define HWACCEL_CAP_ASYNC_SAFE (1 << 0)
+
+typedef struct AVCodecHWConfigInternal {
+ /**
+ * This is the structure which will be returned to the user by
+ * avcodec_get_hw_config().
+ */
+ AVCodecHWConfig public;
+ /**
+ * If this configuration uses a hwaccel, a pointer to it.
+ * If not, NULL.
+ */
+ const AVHWAccel *hwaccel;
+} AVCodecHWConfigInternal;
+
+
#endif /* AVCODEC_HWACCEL_H */
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index bc421f67f..f0a656dca 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -41,6 +41,7 @@
#include "libavutil/dict.h"
#include "avcodec.h"
#include "decode.h"
+#include "hwaccel.h"
#include "libavutil/opt.h"
#include "me_cmp.h"
#include "mpegvideo.h"
@@ -1335,6 +1336,17 @@ int ff_match_2uint16(const uint16_t(*tab)[2], int size,
int a, int b)
return i;
}
+const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index)
+{
+ int i;
+ if (!codec->hw_configs || index < 0)
+ return NULL;
+ for (i = 0; i < index; i++)
+ if (!codec->hw_configs[i])
+ return NULL;
+ return &codec->hw_configs[index]->public;
+}
+
static AVHWAccel *first_hwaccel = NULL;
void av_register_hwaccel(AVHWAccel *hwaccel)
--
2.11.0
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