diff options
| -rw-r--r-- | doc/APIchanges | 3 | ||||
| -rw-r--r-- | libavutil/hwcontext.c | 65 | ||||
| -rw-r--r-- | libavutil/hwcontext.h | 26 | ||||
| -rw-r--r-- | libavutil/hwcontext_internal.h | 8 | ||||
| -rw-r--r-- | libavutil/version.h | 2 |
5 files changed, 103 insertions, 1 deletions
diff --git a/doc/APIchanges b/doc/APIchanges index 9367a5fc41..335c163479 100644 --- a/doc/APIchanges +++ b/doc/APIchanges @@ -13,6 +13,9 @@ libavutil: 2015-08-28 API changes, most recent first: +2017-03-xx - xxxxxxx - lavu 55.34.0 - hwcontext.h + Add av_hwdevice_ctx_create_derived(). + 2017-02-10 - xxxxxxx - lavu 55.33.0 - spherical.h Add AV_SPHERICAL_EQUIRECTANGULAR_TILE, av_spherical_tile_bounds(), and projection-specific properties (bound_left, bound_top, bound_right, diff --git a/libavutil/hwcontext.c b/libavutil/hwcontext.c index 608da68727..252dd32e38 100644 --- a/libavutil/hwcontext.c +++ b/libavutil/hwcontext.c @@ -65,6 +65,8 @@ static void hwdevice_ctx_free(void *opaque, uint8_t *data) if (ctx->free) ctx->free(ctx); + av_buffer_unref(&ctx->internal->source_device); + av_freep(&ctx->hwctx); av_freep(&ctx->internal->priv); av_freep(&ctx->internal); @@ -535,6 +537,69 @@ fail: return ret; } +int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ref_ptr, + enum AVHWDeviceType type, + AVBufferRef *src_ref, int flags) +{ + AVBufferRef *dst_ref = NULL, *tmp_ref; + AVHWDeviceContext *dst_ctx, *tmp_ctx; + int ret = 0; + + tmp_ref = src_ref; + while (tmp_ref) { + tmp_ctx = (AVHWDeviceContext*)tmp_ref->data; + if (tmp_ctx->type == type) { + dst_ref = av_buffer_ref(tmp_ref); + if (!dst_ref) { + ret = AVERROR(ENOMEM); + goto fail; + } + goto done; + } + tmp_ref = tmp_ctx->internal->source_device; + } + + dst_ref = av_hwdevice_ctx_alloc(type); + if (!dst_ref) { + ret = AVERROR(ENOMEM); + goto fail; + } + dst_ctx = (AVHWDeviceContext*)dst_ref->data; + + tmp_ref = src_ref; + while (tmp_ref) { + tmp_ctx = (AVHWDeviceContext*)tmp_ref->data; + if (dst_ctx->internal->hw_type->device_derive) { + ret = dst_ctx->internal->hw_type->device_derive(dst_ctx, + tmp_ctx, + flags); + if (ret == 0) { + dst_ctx->internal->source_device = av_buffer_ref(src_ref); + if (!dst_ctx->internal->source_device) { + ret = AVERROR(ENOMEM); + goto fail; + } + goto done; + } + if (ret != AVERROR(ENOSYS)) + goto fail; + } + tmp_ref = tmp_ctx->internal->source_device; + } + + ret = AVERROR(ENOSYS); + goto fail; + +done: + *dst_ref_ptr = dst_ref; + return 0; + +fail: + av_buffer_unref(&dst_ref); + *dst_ref_ptr = NULL; + return ret; +} + static void ff_hwframe_unmap(void *opaque, uint8_t *data) { HWMapDescriptor *hwmap = (HWMapDescriptor*)data; diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h index 037ca64224..49c7a21c1e 100644 --- a/libavutil/hwcontext.h +++ b/libavutil/hwcontext.h @@ -269,6 +269,32 @@ int av_hwdevice_ctx_create(AVBufferRef **device_ctx, enum AVHWDeviceType type, const char *device, AVDictionary *opts, int flags); /** + * Create a new device of the specified type from an existing device. + * + * If the source device is a device of the target type or was originally + * derived from such a device (possibly through one or more intermediate + * devices of other types), then this will return a reference to the + * existing device of the same type as is requested. + * + * Otherwise, it will attempt to derive a new device from the given source + * device. If direct derivation to the new type is not implemented, it will + * attempt the same derivation from each ancestor of the source device in + * turn looking for an implemented derivation method. + * + * @param dst_ctx On success, a reference to the newly-created + * AVHWDeviceContext. + * @param type The type of the new device to create. + * @param src_ctx A reference to an existing AVHWDeviceContext which will be + * used to create the new device. + * @param flags Currently unused; should be set to zero. + * @return Zero on success, a negative AVERROR code on failure. + */ +int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ctx, + enum AVHWDeviceType type, + AVBufferRef *src_ctx, int flags); + + +/** * Allocate an AVHWFramesContext tied to a given device context. * * @param device_ctx a reference to a AVHWDeviceContext. This function will make diff --git a/libavutil/hwcontext_internal.h b/libavutil/hwcontext_internal.h index 11e3a68e4c..66f54142e8 100644 --- a/libavutil/hwcontext_internal.h +++ b/libavutil/hwcontext_internal.h @@ -66,6 +66,8 @@ typedef struct HWContextType { int (*device_create)(AVHWDeviceContext *ctx, const char *device, AVDictionary *opts, int flags); + int (*device_derive)(AVHWDeviceContext *dst_ctx, + AVHWDeviceContext *src_ctx, int flags); int (*device_init)(AVHWDeviceContext *ctx); void (*device_uninit)(AVHWDeviceContext *ctx); @@ -95,6 +97,12 @@ typedef struct HWContextType { struct AVHWDeviceInternal { const HWContextType *hw_type; void *priv; + + /** + * For a derived device, a reference to the original device + * context it was derived from. + */ + AVBufferRef *source_device; }; struct AVHWFramesInternal { diff --git a/libavutil/version.h b/libavutil/version.h index 0f2b684fa8..7c0e852498 100644 --- a/libavutil/version.h +++ b/libavutil/version.h @@ -54,7 +54,7 @@ */ #define LIBAVUTIL_VERSION_MAJOR 55 -#define LIBAVUTIL_VERSION_MINOR 33 +#define LIBAVUTIL_VERSION_MINOR 34 #define LIBAVUTIL_VERSION_MICRO 0 #define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \ |