diff options
author | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2016-02-17 19:10:53 +0300 |
---|---|---|
committer | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2016-02-17 19:12:25 +0300 |
commit | 1a708780f3d4b431996d118df4e448b4f2a7942e (patch) | |
tree | dc389307bc577b231d25c75aed9eadec125bfc38 | |
parent | 26abd5149ebf9602d8036be4c6e72e08c98ea998 (diff) | |
parent | 89923e418b494e337683442ab896d754bc07341a (diff) |
Merge commit '89923e418b494e337683442ab896d754bc07341a'
* commit '89923e418b494e337683442ab896d754bc07341a':
lavu: add a framework for handling hwaccel frames
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
-rw-r--r-- | doc/APIchanges | 2 | ||||
-rw-r--r-- | libavutil/Makefile | 2 | ||||
-rw-r--r-- | libavutil/frame.c | 10 | ||||
-rw-r--r-- | libavutil/frame.h | 6 | ||||
-rw-r--r-- | libavutil/hwcontext.c | 396 | ||||
-rw-r--r-- | libavutil/hwcontext.h | 328 | ||||
-rw-r--r-- | libavutil/hwcontext_internal.h | 89 |
7 files changed, 833 insertions, 0 deletions
diff --git a/doc/APIchanges b/doc/APIchanges index 1c767871cc..28ba7aadf9 100644 --- a/doc/APIchanges +++ b/doc/APIchanges @@ -17,6 +17,8 @@ API changes, most recent first: 2016-xx-xx - lavu 55.18.0 xxxxxxx buffer.h - Add av_buffer_pool_init2(). + xxxxxxx hwcontext.h - Add a new installed header hwcontext.h with a new API + for handling hwaccel frames. -------- 8< --------- FFmpeg 3.0 was cut here -------- 8< --------- diff --git a/libavutil/Makefile b/libavutil/Makefile index 65b2d25877..cec5584684 100644 --- a/libavutil/Makefile +++ b/libavutil/Makefile @@ -31,6 +31,7 @@ HEADERS = adler32.h \ frame.h \ hash.h \ hmac.h \ + hwcontext.h \ imgutils.h \ intfloat.h \ intreadwrite.h \ @@ -108,6 +109,7 @@ OBJS = adler32.o \ frame.o \ hash.o \ hmac.o \ + hwcontext.o \ imgutils.o \ integer.o \ intmath.o \ diff --git a/libavutil/frame.c b/libavutil/frame.c index 033f013458..6ee3e6fb7b 100644 --- a/libavutil/frame.c +++ b/libavutil/frame.c @@ -429,6 +429,14 @@ int av_frame_ref(AVFrame *dst, const AVFrame *src) } } + if (src->hw_frames_ctx) { + dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx); + if (!dst->hw_frames_ctx) { + ret = AVERROR(ENOMEM); + goto fail; + } + } + /* duplicate extended data */ if (src->extended_data != src->data) { int ch = src->channels; @@ -490,6 +498,8 @@ void av_frame_unref(AVFrame *frame) av_buffer_unref(&frame->qp_table_buf); #endif + av_buffer_unref(&frame->hw_frames_ctx); + get_frame_defaults(frame); } diff --git a/libavutil/frame.h b/libavutil/frame.h index 8dc4049072..aadc796880 100644 --- a/libavutil/frame.h +++ b/libavutil/frame.h @@ -422,6 +422,12 @@ typedef struct AVFrame { enum AVChromaLocation chroma_location; /** + * For hwaccel-format frames, this should be a reference to the + * AVHWFramesContext describing the frame. + */ + AVBufferRef *hw_frames_ctx; + + /** * frame timestamp estimated using various heuristics, in stream time base * Code outside libavutil should access this field using: * av_frame_get_best_effort_timestamp(frame) diff --git a/libavutil/hwcontext.c b/libavutil/hwcontext.c new file mode 100644 index 0000000000..05c50a42eb --- /dev/null +++ b/libavutil/hwcontext.c @@ -0,0 +1,396 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" + +#include "buffer.h" +#include "common.h" +#include "hwcontext.h" +#include "hwcontext_internal.h" +#include "imgutils.h" +#include "log.h" +#include "mem.h" +#include "pixdesc.h" +#include "pixfmt.h" + +static const HWContextType *hw_table[] = { + NULL, +}; + +static const AVClass hwdevice_ctx_class = { + .class_name = "AVHWDeviceContext", + .item_name = av_default_item_name, + .version = LIBAVUTIL_VERSION_INT, +}; + +static void hwdevice_ctx_free(void *opaque, uint8_t *data) +{ + AVHWDeviceContext *ctx = (AVHWDeviceContext*)data; + + /* uninit might still want access the hw context and the user + * free() callback might destroy it, so uninit has to be called first */ + if (ctx->internal->hw_type->device_uninit) + ctx->internal->hw_type->device_uninit(ctx); + + if (ctx->free) + ctx->free(ctx); + + av_freep(&ctx->hwctx); + av_freep(&ctx->internal->priv); + av_freep(&ctx->internal); + av_freep(&ctx); +} + +AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type) +{ + AVHWDeviceContext *ctx; + AVBufferRef *buf; + const HWContextType *hw_type = NULL; + int i; + + for (i = 0; hw_table[i]; i++) { + if (hw_table[i]->type == type) { + hw_type = hw_table[i]; + break; + } + } + if (!hw_type) + return NULL; + + ctx = av_mallocz(sizeof(*ctx)); + if (!ctx) + return NULL; + + ctx->internal = av_mallocz(sizeof(*ctx->internal)); + if (!ctx->internal) + goto fail; + + if (hw_type->device_priv_size) { + ctx->internal->priv = av_mallocz(hw_type->device_priv_size); + if (!ctx->internal->priv) + goto fail; + } + + if (hw_type->device_hwctx_size) { + ctx->hwctx = av_mallocz(hw_type->device_hwctx_size); + if (!ctx->hwctx) + goto fail; + } + + buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx), + hwdevice_ctx_free, NULL, + AV_BUFFER_FLAG_READONLY); + if (!buf) + goto fail; + + ctx->type = type; + ctx->av_class = &hwdevice_ctx_class; + + ctx->internal->hw_type = hw_type; + + return buf; + +fail: + if (ctx->internal) + av_freep(&ctx->internal->priv); + av_freep(&ctx->internal); + av_freep(&ctx->hwctx); + av_freep(&ctx); + return NULL; +} + +int av_hwdevice_ctx_init(AVBufferRef *ref) +{ + AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; + int ret; + + if (ctx->internal->hw_type->device_init) { + ret = ctx->internal->hw_type->device_init(ctx); + if (ret < 0) + goto fail; + } + + return 0; +fail: + if (ctx->internal->hw_type->device_uninit) + ctx->internal->hw_type->device_uninit(ctx); + return ret; +} + +static const AVClass hwframe_ctx_class = { + .class_name = "AVHWFramesContext", + .item_name = av_default_item_name, + .version = LIBAVUTIL_VERSION_INT, +}; + +static void hwframe_ctx_free(void *opaque, uint8_t *data) +{ + AVHWFramesContext *ctx = (AVHWFramesContext*)data; + + if (ctx->internal->pool_internal) + av_buffer_pool_uninit(&ctx->internal->pool_internal); + + if (ctx->internal->hw_type->frames_uninit) + ctx->internal->hw_type->frames_uninit(ctx); + + if (ctx->free) + ctx->free(ctx); + + av_buffer_unref(&ctx->device_ref); + + av_freep(&ctx->hwctx); + av_freep(&ctx->internal->priv); + av_freep(&ctx->internal); + av_freep(&ctx); +} + +AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ref_in) +{ + AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)device_ref_in->data; + const HWContextType *hw_type = device_ctx->internal->hw_type; + AVHWFramesContext *ctx; + AVBufferRef *buf, *device_ref = NULL;; + + ctx = av_mallocz(sizeof(*ctx)); + if (!ctx) + return NULL; + + ctx->internal = av_mallocz(sizeof(*ctx->internal)); + if (!ctx->internal) + goto fail; + + if (hw_type->frames_priv_size) { + ctx->internal->priv = av_mallocz(hw_type->frames_priv_size); + if (!ctx->internal->priv) + goto fail; + } + + if (hw_type->frames_hwctx_size) { + ctx->hwctx = av_mallocz(hw_type->frames_hwctx_size); + if (!ctx->hwctx) + goto fail; + } + + device_ref = av_buffer_ref(device_ref_in); + if (!device_ref) + goto fail; + + buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx), + hwframe_ctx_free, NULL, + AV_BUFFER_FLAG_READONLY); + if (!buf) + goto fail; + + ctx->av_class = &hwframe_ctx_class; + ctx->device_ref = device_ref; + ctx->device_ctx = device_ctx; + ctx->format = AV_PIX_FMT_NONE; + + ctx->internal->hw_type = hw_type; + + return buf; + +fail: + if (device_ref) + av_buffer_unref(&device_ref); + if (ctx->internal) + av_freep(&ctx->internal->priv); + av_freep(&ctx->internal); + av_freep(&ctx->hwctx); + av_freep(&ctx); + return NULL; +} + +static int hwframe_pool_prealloc(AVBufferRef *ref) +{ + AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data; + AVFrame **frames; + int i, ret = 0; + + frames = av_mallocz_array(ctx->initial_pool_size, sizeof(*frames)); + if (!frames) + return AVERROR(ENOMEM); + + for (i = 0; i < ctx->initial_pool_size; i++) { + frames[i] = av_frame_alloc(); + if (!frames[i]) + goto fail; + + ret = av_hwframe_get_buffer(ref, frames[i], 0); + if (ret < 0) + goto fail; + } + +fail: + for (i = 0; i < ctx->initial_pool_size; i++) + av_frame_free(&frames[i]); + av_freep(&frames); + + return ret; +} + +int av_hwframe_ctx_init(AVBufferRef *ref) +{ + AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data; + const enum AVPixelFormat *pix_fmt; + int ret; + + /* validate the pixel format */ + for (pix_fmt = ctx->internal->hw_type->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++) { + if (*pix_fmt == ctx->format) + break; + } + if (*pix_fmt == AV_PIX_FMT_NONE) { + av_log(ctx, AV_LOG_ERROR, + "The hardware pixel format '%s' is not supported by the device type '%s'\n", + av_get_pix_fmt_name(ctx->format), ctx->internal->hw_type->name); + return AVERROR(ENOSYS); + } + + /* validate the dimensions */ + ret = av_image_check_size(ctx->width, ctx->height, 0, ctx); + if (ret < 0) + return ret; + + /* format-specific init */ + if (ctx->internal->hw_type->frames_init) { + ret = ctx->internal->hw_type->frames_init(ctx); + if (ret < 0) + goto fail; + } + + if (ctx->internal->pool_internal && !ctx->pool) + ctx->pool = ctx->internal->pool_internal; + + /* preallocate the frames in the pool, if requested */ + if (ctx->initial_pool_size > 0) { + ret = hwframe_pool_prealloc(ref); + if (ret < 0) + goto fail; + } + + return 0; +fail: + if (ctx->internal->hw_type->frames_uninit) + ctx->internal->hw_type->frames_uninit(ctx); + return ret; +} + +int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref, + enum AVHWFrameTransferDirection dir, + enum AVPixelFormat **formats, int flags) +{ + AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; + + if (!ctx->internal->hw_type->transfer_get_formats) + return AVERROR(ENOSYS); + + return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats); +} + +static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags) +{ + AVFrame *frame_tmp; + int ret = 0; + + frame_tmp = av_frame_alloc(); + if (!frame_tmp) + return AVERROR(ENOMEM); + + /* if the format is set, use that + * otherwise pick the first supported one */ + if (dst->format >= 0) { + frame_tmp->format = dst->format; + } else { + enum AVPixelFormat *formats; + + ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx, + AV_HWFRAME_TRANSFER_DIRECTION_FROM, + &formats, 0); + if (ret < 0) + goto fail; + frame_tmp->format = formats[0]; + av_freep(&formats); + } + frame_tmp->width = src->width; + frame_tmp->height = src->height; + + ret = av_frame_get_buffer(frame_tmp, 32); + if (ret < 0) + goto fail; + + ret = av_hwframe_transfer_data(frame_tmp, src, flags); + if (ret < 0) + goto fail; + + av_frame_move_ref(dst, frame_tmp); + +fail: + av_frame_free(&frame_tmp); + return ret; +} + +int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags) +{ + AVHWFramesContext *ctx; + int ret; + + if (!dst->buf[0]) + return transfer_data_alloc(dst, src, flags); + + if (src->hw_frames_ctx) { + ctx = (AVHWFramesContext*)src->hw_frames_ctx->data; + + ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src); + if (ret < 0) + return ret; + } else if (dst->hw_frames_ctx) { + ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data; + + ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src); + if (ret < 0) + return ret; + } else + return AVERROR(ENOSYS); + + return 0; +} + +int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags) +{ + AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; + int ret; + + if (!ctx->internal->hw_type->frames_get_buffer) + return AVERROR(ENOSYS); + + if (!ctx->pool) + return AVERROR(EINVAL); + + frame->hw_frames_ctx = av_buffer_ref(hwframe_ref); + if (!frame->hw_frames_ctx) + return AVERROR(ENOMEM); + + ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame); + if (ret < 0) { + av_buffer_unref(&frame->hw_frames_ctx); + return ret; + } + + return 0; +} diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h new file mode 100644 index 0000000000..07123687d2 --- /dev/null +++ b/libavutil/hwcontext.h @@ -0,0 +1,328 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVUTIL_HWCONTEXT_H +#define AVUTIL_HWCONTEXT_H + +#include "buffer.h" +#include "frame.h" +#include "log.h" +#include "pixfmt.h" + +enum AVHWDeviceType { + AV_HWDEVICE_TYPE_VDPAU, +}; + +typedef struct AVHWDeviceInternal AVHWDeviceInternal; + +/** + * This struct aggregates all the (hardware/vendor-specific) "high-level" state, + * i.e. state that is not tied to a concrete processing configuration. + * E.g., in an API that supports hardware-accelerated encoding and decoding, + * this struct will (if possible) wrap the state that is common to both encoding + * and decoding and from which specific instances of encoders or decoders can be + * derived. + * + * This struct is reference-counted with the AVBuffer mechanism. The + * av_hwdevice_ctx_alloc() constructor yields a reference, whose data field + * points to the actual AVHWDeviceContext. Further objects derived from + * AVHWDeviceContext (such as AVHWFramesContext, describing a frame pool with + * specific properties) will hold an internal reference to it. After all the + * references are released, the AVHWDeviceContext itself will be freed, + * optionally invoking a user-specified callback for uninitializing the hardware + * state. + */ +typedef struct AVHWDeviceContext { + /** + * A class for logging. Set by av_hwdevice_ctx_alloc(). + */ + const AVClass *av_class; + + /** + * Private data used internally by libavutil. Must not be accessed in any + * way by the caller. + */ + AVHWDeviceInternal *internal; + + /** + * This field identifies the underlying API used for hardware access. + * + * This field is set when this struct is allocated and never changed + * afterwards. + */ + enum AVHWDeviceType type; + + /** + * The format-specific data, allocated and freed by libavutil along with + * this context. + * + * Should be cast by the user to the format-specific context defined in the + * corresponding header (hwcontext_*.h) and filled as described in the + * documentation before calling av_hwdevice_ctx_init(). + * + * After calling av_hwdevice_ctx_init() this struct should not be modified + * by the caller. + */ + void *hwctx; + + /** + * This field may be set by the caller before calling av_hwdevice_ctx_init(). + * + * If non-NULL, this callback will be called when the last reference to + * this context is unreferenced, immediately before it is freed. + * + * @note when other objects (e.g an AVHWFramesContext) are derived from this + * struct, this callback will be invoked after all such child objects + * are fully uninitialized and their respective destructors invoked. + */ + void (*free)(struct AVHWDeviceContext *ctx); + + /** + * Arbitrary user data, to be used e.g. by the free() callback. + */ + void *user_opaque; +} AVHWDeviceContext; + +typedef struct AVHWFramesInternal AVHWFramesInternal; + +/** + * This struct describes a set or pool of "hardware" frames (i.e. those with + * data not located in normal system memory). All the frames in the pool are + * assumed to be allocated in the same way and interchangeable. + * + * This struct is reference-counted with the AVBuffer mechanism and tied to a + * given AVHWDeviceContext instance. The av_hwframe_ctx_alloc() constructor + * yields a reference, whose data field points to the actual AVHWFramesContext + * struct. + */ +typedef struct AVHWFramesContext { + /** + * A class for logging. + */ + const AVClass *av_class; + + /** + * Private data used internally by libavutil. Must not be accessed in any + * way by the caller. + */ + AVHWFramesInternal *internal; + + /** + * A reference to the parent AVHWDeviceContext. This reference is owned and + * managed by the enclosing AVHWFramesContext, but the caller may derive + * additional references from it. + */ + AVBufferRef *device_ref; + + /** + * The parent AVHWDeviceContext. This is simply a pointer to + * device_ref->data provided for convenience. + * + * Set by libavutil in av_hwframe_ctx_init(). + */ + AVHWDeviceContext *device_ctx; + + /** + * The format-specific data, allocated and freed automatically along with + * this context. + * + * Should be cast by the user to the format-specific context defined in the + * corresponding header (hwframe_*.h) and filled as described in the + * documentation before calling av_hwframe_ctx_init(). + * + * After any frames using this context are created, the contents of this + * struct should not be modified by the caller. + */ + void *hwctx; + + /** + * This field may be set by the caller before calling av_hwframe_ctx_init(). + * + * If non-NULL, this callback will be called when the last reference to + * this context is unreferenced, immediately before it is freed. + */ + void (*free)(struct AVHWFramesContext *ctx); + + /** + * Arbitrary user data, to be used e.g. by the free() callback. + */ + void *user_opaque; + + /** + * A pool from which the frames are allocated by av_hwframe_get_buffer(). + * This field may be set by the caller before calling av_hwframe_ctx_init(). + * The buffers returned by calling av_buffer_pool_get() on this pool must + * have the properties described in the documentation in the correponding hw + * type's header (hwcontext_*.h). The pool will be freed strictly before + * this struct's free() callback is invoked. + * + * This field may be NULL, then libavutil will attempt to allocate a pool + * internally. Note that certain device types enforce pools allocated at + * fixed size (frame count), which cannot be extended dynamically. In such a + * case, initial_pool_size must be set appropriately. + */ + AVBufferPool *pool; + + /** + * Initial size of the frame pool. If a device type does not support + * dynamically resizing the pool, then this is also the maximum pool size. + * + * May be set by the caller before calling av_hwframe_ctx_init(). Must be + * set if pool is NULL and the device type does not support dynamic pools. + */ + int initial_pool_size; + + /** + * The pixel format identifying the underlying HW surface type. + * + * Must be a hwaccel format, i.e. the corresponding descriptor must have the + * AV_PIX_FMT_FLAG_HWACCEL flag set. + * + * Must be set by the user before calling av_hwframe_ctx_init(). + */ + enum AVPixelFormat format; + + /** + * The pixel format identifying the actual data layout of the hardware + * frames. + * + * Must be set by the caller before calling av_hwframe_ctx_init(). + * + * @note when the underlying API does not provide the exact data layout, but + * only the colorspace/bit depth, this field should be set to the fully + * planar version of that format (e.g. for 8-bit 420 YUV it should be + * AV_PIX_FMT_YUV420P, not AV_PIX_FMT_NV12 or anything else). + */ + enum AVPixelFormat sw_format; + + /** + * The allocated dimensions of the frames in this pool. + * + * Must be set by the user before calling av_hwframe_ctx_init(). + */ + int width, height; +} AVHWFramesContext; + +/** + * Allocate an AVHWDeviceContext for a given pixel format. + * + * @param format a hwaccel pixel format (AV_PIX_FMT_FLAG_HWACCEL must be set + * on the corresponding format descriptor) + * @return a reference to the newly created AVHWDeviceContext on success or NULL + * on failure. + */ +AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type); + +/** + * Finalize the device context before use. This function must be called after + * the context is filled with all the required information and before it is + * used in any way. + * + * @param ref a reference to the AVHWDeviceContext + * @return 0 on success, a negative AVERROR code on failure + */ +int av_hwdevice_ctx_init(AVBufferRef *ref); + +/** + * Allocate an AVHWFramesContext tied to a given device context. + * + * @param device_ctx a reference to a AVHWDeviceContext. This function will make + * a new reference for internal use, the one passed to the + * function remains owned by the caller. + * @return a reference to the newly created AVHWFramesContext on success or NULL + * on failure. + */ +AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ctx); + +/** + * Finalize the context before use. This function must be called after the + * context is filled with all the required information and before it is attached + * to any frames. + * + * @param ref a reference to the AVHWFramesContext + * @return 0 on success, a negative AVERROR code on failure + */ +int av_hwframe_ctx_init(AVBufferRef *ref); + +/** + * Allocate a new frame attached to the given AVHWFramesContext. + * + * @param hwframe_ctx a reference to an AVHWFramesContext + * @param frame an empty (freshly allocated or unreffed) frame to be filled with + * newly allocated buffers. + * @param flags currently unused, should be set to zero + * @return 0 on success, a negative AVERROR code on failure + */ +int av_hwframe_get_buffer(AVBufferRef *hwframe_ctx, AVFrame *frame, int flags); + +/** + * Copy data to or from a hw surface. At least one of dst/src must have an + * AVHWFramesContext attached. + * + * If src has an AVHWFramesContext attached, then the format of dst (if set) + * must use one of the formats returned by av_hwframe_transfer_get_formats(src, + * AV_HWFRAME_TRANSFER_DIRECTION_FROM). + * If dst has an AVHWFramesContext attached, then the format of src must use one + * of the formats returned by av_hwframe_transfer_get_formats(dst, + * AV_HWFRAME_TRANSFER_DIRECTION_TO) + * + * dst may be "clean" (i.e. with data/buf pointers unset), in which case the + * data buffers will be allocated by this function using av_frame_get_buffer(). + * If dst->format is set, then this format will be used, otherwise (when + * dst->format is AV_PIX_FMT_NONE) the first acceptable format will be chosen. + * + * @param dst the destination frame. dst is not touched on failure. + * @param src the source frame. + * @param flags currently unused, should be set to zero + * @return 0 on success, a negative AVERROR error code on failure. + */ +int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags); + +enum AVHWFrameTransferDirection { + /** + * Transfer the data from the queried hw frame. + */ + AV_HWFRAME_TRANSFER_DIRECTION_FROM, + + /** + * Transfer the data to the queried hw frame. + */ + AV_HWFRAME_TRANSFER_DIRECTION_TO, +}; + +/** + * Get a list of possible source or target formats usable in + * av_hwframe_transfer_data(). + * + * @param hwframe_ctx the frame context to obtain the information for + * @param dir the direction of the transfer + * @param formats the pointer to the output format list will be written here. + * The list is terminated with AV_PIX_FMT_NONE and must be freed + * by the caller when no longer needed using av_free(). + * If this function returns successfully, the format list will + * have at least one item (not counting the terminator). + * On failure, the contents of this pointer are unspecified. + * @param flags currently unused, should be set to zero + * @return 0 on success, a negative AVERROR code on failure. + */ +int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ctx, + enum AVHWFrameTransferDirection dir, + enum AVPixelFormat **formats, int flags); + + +#endif /* AVUTIL_HWCONTEXT_H */ diff --git a/libavutil/hwcontext_internal.h b/libavutil/hwcontext_internal.h new file mode 100644 index 0000000000..07183c2a61 --- /dev/null +++ b/libavutil/hwcontext_internal.h @@ -0,0 +1,89 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVUTIL_HWCONTEXT_INTERNAL_H +#define AVUTIL_HWCONTEXT_INTERNAL_H + +#include <stddef.h> + +#include "buffer.h" +#include "hwcontext.h" +#include "frame.h" +#include "pixfmt.h" + +typedef struct HWContextType { + enum AVHWDeviceType type; + const char *name; + + /** + * An array of pixel formats supported by the AVHWFramesContext instances + * Terminated by AV_PIX_FMT_NONE. + */ + const enum AVPixelFormat *pix_fmts; + + /** + * size of the public hardware-specific context, + * i.e. AVHWDeviceContext.hwctx + */ + size_t device_hwctx_size; + /** + * size of the private data, i.e. + * AVHWDeviceInternal.priv + */ + size_t device_priv_size; + + /** + * size of the public frame pool hardware-specific context, + * i.e. AVHWFramesContext.hwctx + */ + size_t frames_hwctx_size; + /** + * size of the private data, i.e. + * AVHWFramesInternal.priv + */ + size_t frames_priv_size; + + int (*device_init)(AVHWDeviceContext *ctx); + void (*device_uninit)(AVHWDeviceContext *ctx); + + int (*frames_init)(AVHWFramesContext *ctx); + void (*frames_uninit)(AVHWFramesContext *ctx); + + int (*frames_get_buffer)(AVHWFramesContext *ctx, AVFrame *frame); + int (*transfer_get_formats)(AVHWFramesContext *ctx, + enum AVHWFrameTransferDirection dir, + enum AVPixelFormat **formats); + int (*transfer_data_to)(AVHWFramesContext *ctx, AVFrame *dst, + const AVFrame *src); + int (*transfer_data_from)(AVHWFramesContext *ctx, AVFrame *dst, + const AVFrame *src); +} HWContextType; + +struct AVHWDeviceInternal { + const HWContextType *hw_type; + void *priv; +}; + +struct AVHWFramesInternal { + const HWContextType *hw_type; + void *priv; + + AVBufferPool *pool_internal; +}; + +#endif /* AVUTIL_HWCONTEXT_INTERNAL_H */ |