---
doc/APIchanges | 3 +++
libavcodec/avcodec.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/utils.c | 11 ++++++++
3 files changed, 88 insertions(+)
diff --git a/doc/APIchanges b/doc/APIchanges
index fa27007f4..80a8ac1fa 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.hw_configs.
+
2017-xx-xx - xxxxxxx - lavu 56.6.0 - pixdesc.h
Add av_color_range_from_name(), av_color_primaries_from_name(),
av_color_transfer_from_name(), av_color_space_from_name(), and
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 162f1abe4..5f4a95287 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 +2736,65 @@ 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 are 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;
+ /**
+ * Set if this configuration is for a decoder which uses AVHWAccel.
+ */
+ int hwaccel;
+ /**
+ * 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 +2919,23 @@ 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 must be terminated with
+ * a NULL pointer.
+ *
+ * This field should only be accessed via avcodec_get_hw_config().
+ */
+ const AVCodecHWConfig **hw_configs;
} AVCodec;
/**
+ * Retrieve supported hardware configurations for a codec.
+ */
+const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
+
+/**
* @defgroup lavc_hwaccel AVHWAccel
* @{
*/
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index bc421f67f..39c4000a7 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1335,6 +1335,17 @@ 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];
+}
+
static AVHWAccel *first_hwaccel = NULL;
void av_register_hwaccel(AVHWAccel *hwaccel)
--
2.11.0
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