diff options
Diffstat (limited to 'media/ffvpx/libavutil/hwcontext.c')
| -rw-r--r-- | media/ffvpx/libavutil/hwcontext.c | 873 |
1 files changed, 0 insertions, 873 deletions
diff --git a/media/ffvpx/libavutil/hwcontext.c b/media/ffvpx/libavutil/hwcontext.c deleted file mode 100644 index 70c556ecac..0000000000 --- a/media/ffvpx/libavutil/hwcontext.c +++ /dev/null @@ -1,873 +0,0 @@ -/* - * 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 * const hw_table[] = { -#if CONFIG_CUDA - &ff_hwcontext_type_cuda, -#endif -#if CONFIG_D3D11VA - &ff_hwcontext_type_d3d11va, -#endif -#if CONFIG_LIBDRM - &ff_hwcontext_type_drm, -#endif -#if CONFIG_DXVA2 - &ff_hwcontext_type_dxva2, -#endif -#if CONFIG_OPENCL - &ff_hwcontext_type_opencl, -#endif -#if CONFIG_QSV - &ff_hwcontext_type_qsv, -#endif -#if CONFIG_VAAPI - &ff_hwcontext_type_vaapi, -#endif -#if CONFIG_VDPAU - &ff_hwcontext_type_vdpau, -#endif -#if CONFIG_VIDEOTOOLBOX - &ff_hwcontext_type_videotoolbox, -#endif -#if CONFIG_MEDIACODEC - &ff_hwcontext_type_mediacodec, -#endif - NULL, -}; - -static const char *const hw_type_names[] = { - [AV_HWDEVICE_TYPE_CUDA] = "cuda", - [AV_HWDEVICE_TYPE_DRM] = "drm", - [AV_HWDEVICE_TYPE_DXVA2] = "dxva2", - [AV_HWDEVICE_TYPE_D3D11VA] = "d3d11va", - [AV_HWDEVICE_TYPE_OPENCL] = "opencl", - [AV_HWDEVICE_TYPE_QSV] = "qsv", - [AV_HWDEVICE_TYPE_VAAPI] = "vaapi", - [AV_HWDEVICE_TYPE_VDPAU] = "vdpau", - [AV_HWDEVICE_TYPE_VIDEOTOOLBOX] = "videotoolbox", - [AV_HWDEVICE_TYPE_MEDIACODEC] = "mediacodec", -}; - -enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name) -{ - int type; - for (type = 0; type < FF_ARRAY_ELEMS(hw_type_names); type++) { - if (hw_type_names[type] && !strcmp(hw_type_names[type], name)) - return type; - } - return AV_HWDEVICE_TYPE_NONE; -} - -const char *av_hwdevice_get_type_name(enum AVHWDeviceType type) -{ - if (type > AV_HWDEVICE_TYPE_NONE && - type < FF_ARRAY_ELEMS(hw_type_names)) - return hw_type_names[type]; - else - return NULL; -} - -enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev) -{ - enum AVHWDeviceType next; - int i, set = 0; - for (i = 0; hw_table[i]; i++) { - if (prev != AV_HWDEVICE_TYPE_NONE && hw_table[i]->type <= prev) - continue; - if (!set || hw_table[i]->type < next) { - next = hw_table[i]->type; - set = 1; - } - } - return set ? next : AV_HWDEVICE_TYPE_NONE; -} - -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_buffer_unref(&ctx->internal->source_device); - - 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->internal->source_frames); - - 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->sw_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; - - if (ctx->internal->source_frames) { - /* A derived frame context is already initialised. */ - return 0; - } - - /* 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) -{ - AVHWFramesContext *ctx = (AVHWFramesContext*)src->hw_frames_ctx->data; - 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 = ctx->width; - frame_tmp->height = ctx->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; - - frame_tmp->width = src->width; - frame_tmp->height = src->height; - - 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->source_frames) { - // This is a derived frame context, so we allocate in the source - // and map the frame immediately. - AVFrame *src_frame; - - frame->format = ctx->format; - frame->hw_frames_ctx = av_buffer_ref(hwframe_ref); - if (!frame->hw_frames_ctx) - return AVERROR(ENOMEM); - - src_frame = av_frame_alloc(); - if (!src_frame) - return AVERROR(ENOMEM); - - ret = av_hwframe_get_buffer(ctx->internal->source_frames, - src_frame, 0); - if (ret < 0) { - av_frame_free(&src_frame); - return ret; - } - - ret = av_hwframe_map(frame, src_frame, - ctx->internal->source_allocation_map_flags); - if (ret) { - av_log(ctx, AV_LOG_ERROR, "Failed to map frame into derived " - "frame context: %d.\n", ret); - av_frame_free(&src_frame); - return ret; - } - - // Free the source frame immediately - the mapped frame still - // contains a reference to it. - av_frame_free(&src_frame); - - return 0; - } - - 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; -} - -void *av_hwdevice_hwconfig_alloc(AVBufferRef *ref) -{ - AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; - const HWContextType *hw_type = ctx->internal->hw_type; - - if (hw_type->device_hwconfig_size == 0) - return NULL; - - return av_mallocz(hw_type->device_hwconfig_size); -} - -AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref, - const void *hwconfig) -{ - AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; - const HWContextType *hw_type = ctx->internal->hw_type; - AVHWFramesConstraints *constraints; - - if (!hw_type->frames_get_constraints) - return NULL; - - constraints = av_mallocz(sizeof(*constraints)); - if (!constraints) - return NULL; - - constraints->min_width = constraints->min_height = 0; - constraints->max_width = constraints->max_height = INT_MAX; - - if (hw_type->frames_get_constraints(ctx, hwconfig, constraints) >= 0) { - return constraints; - } else { - av_hwframe_constraints_free(&constraints); - return NULL; - } -} - -void av_hwframe_constraints_free(AVHWFramesConstraints **constraints) -{ - if (*constraints) { - av_freep(&(*constraints)->valid_hw_formats); - av_freep(&(*constraints)->valid_sw_formats); - } - av_freep(constraints); -} - -int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type, - const char *device, AVDictionary *opts, int flags) -{ - AVBufferRef *device_ref = NULL; - AVHWDeviceContext *device_ctx; - int ret = 0; - - device_ref = av_hwdevice_ctx_alloc(type); - if (!device_ref) { - ret = AVERROR(ENOMEM); - goto fail; - } - device_ctx = (AVHWDeviceContext*)device_ref->data; - - if (!device_ctx->internal->hw_type->device_create) { - ret = AVERROR(ENOSYS); - goto fail; - } - - ret = device_ctx->internal->hw_type->device_create(device_ctx, device, - opts, flags); - if (ret < 0) - goto fail; - - ret = av_hwdevice_ctx_init(device_ref); - if (ret < 0) - goto fail; - - *pdevice_ref = device_ref; - return 0; -fail: - av_buffer_unref(&device_ref); - *pdevice_ref = NULL; - 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: - ret = av_hwdevice_ctx_init(dst_ref); - if (ret < 0) - goto fail; - - *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; - AVHWFramesContext *ctx = opaque; - - if (hwmap->unmap) - hwmap->unmap(ctx, hwmap); - - av_frame_free(&hwmap->source); - - av_buffer_unref(&hwmap->hw_frames_ctx); - - av_free(hwmap); -} - -int ff_hwframe_map_create(AVBufferRef *hwframe_ref, - AVFrame *dst, const AVFrame *src, - void (*unmap)(AVHWFramesContext *ctx, - HWMapDescriptor *hwmap), - void *priv) -{ - AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; - HWMapDescriptor *hwmap; - int ret; - - hwmap = av_mallocz(sizeof(*hwmap)); - if (!hwmap) { - ret = AVERROR(ENOMEM); - goto fail; - } - - hwmap->source = av_frame_alloc(); - if (!hwmap->source) { - ret = AVERROR(ENOMEM); - goto fail; - } - ret = av_frame_ref(hwmap->source, src); - if (ret < 0) - goto fail; - - hwmap->hw_frames_ctx = av_buffer_ref(hwframe_ref); - if (!hwmap->hw_frames_ctx) { - ret = AVERROR(ENOMEM); - goto fail; - } - - hwmap->unmap = unmap; - hwmap->priv = priv; - - dst->buf[0] = av_buffer_create((uint8_t*)hwmap, sizeof(*hwmap), - &ff_hwframe_unmap, ctx, 0); - if (!dst->buf[0]) { - ret = AVERROR(ENOMEM); - goto fail; - } - - return 0; - -fail: - if (hwmap) { - av_buffer_unref(&hwmap->hw_frames_ctx); - av_frame_free(&hwmap->source); - } - av_free(hwmap); - return ret; -} - -int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags) -{ - AVHWFramesContext *src_frames, *dst_frames; - HWMapDescriptor *hwmap; - int ret; - - if (src->hw_frames_ctx && dst->hw_frames_ctx) { - src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data; - dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data; - - if ((src_frames == dst_frames && - src->format == dst_frames->sw_format && - dst->format == dst_frames->format) || - (src_frames->internal->source_frames && - src_frames->internal->source_frames->data == - (uint8_t*)dst_frames)) { - // This is an unmap operation. We don't need to directly - // do anything here other than fill in the original frame, - // because the real unmap will be invoked when the last - // reference to the mapped frame disappears. - if (!src->buf[0]) { - av_log(src_frames, AV_LOG_ERROR, "Invalid mapping " - "found when attempting unmap.\n"); - return AVERROR(EINVAL); - } - hwmap = (HWMapDescriptor*)src->buf[0]->data; - av_frame_unref(dst); - return av_frame_ref(dst, hwmap->source); - } - } - - if (src->hw_frames_ctx) { - src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data; - - if (src_frames->format == src->format && - src_frames->internal->hw_type->map_from) { - ret = src_frames->internal->hw_type->map_from(src_frames, - dst, src, flags); - if (ret != AVERROR(ENOSYS)) - return ret; - } - } - - if (dst->hw_frames_ctx) { - dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data; - - if (dst_frames->format == dst->format && - dst_frames->internal->hw_type->map_to) { - ret = dst_frames->internal->hw_type->map_to(dst_frames, - dst, src, flags); - if (ret != AVERROR(ENOSYS)) - return ret; - } - } - - return AVERROR(ENOSYS); -} - -int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx, - enum AVPixelFormat format, - AVBufferRef *derived_device_ctx, - AVBufferRef *source_frame_ctx, - int flags) -{ - AVBufferRef *dst_ref = NULL; - AVHWFramesContext *dst = NULL; - AVHWFramesContext *src = (AVHWFramesContext*)source_frame_ctx->data; - int ret; - - if (src->internal->source_frames) { - AVHWFramesContext *src_src = - (AVHWFramesContext*)src->internal->source_frames->data; - AVHWDeviceContext *dst_dev = - (AVHWDeviceContext*)derived_device_ctx->data; - - if (src_src->device_ctx == dst_dev) { - // This is actually an unmapping, so we just return a - // reference to the source frame context. - *derived_frame_ctx = - av_buffer_ref(src->internal->source_frames); - if (!*derived_frame_ctx) { - ret = AVERROR(ENOMEM); - goto fail; - } - return 0; - } - } - - dst_ref = av_hwframe_ctx_alloc(derived_device_ctx); - if (!dst_ref) { - ret = AVERROR(ENOMEM); - goto fail; - } - - dst = (AVHWFramesContext*)dst_ref->data; - - dst->format = format; - dst->sw_format = src->sw_format; - dst->width = src->width; - dst->height = src->height; - - dst->internal->source_frames = av_buffer_ref(source_frame_ctx); - if (!dst->internal->source_frames) { - ret = AVERROR(ENOMEM); - goto fail; - } - - dst->internal->source_allocation_map_flags = - flags & (AV_HWFRAME_MAP_READ | - AV_HWFRAME_MAP_WRITE | - AV_HWFRAME_MAP_OVERWRITE | - AV_HWFRAME_MAP_DIRECT); - - ret = AVERROR(ENOSYS); - if (src->internal->hw_type->frames_derive_from) - ret = src->internal->hw_type->frames_derive_from(dst, src, flags); - if (ret == AVERROR(ENOSYS) && - dst->internal->hw_type->frames_derive_to) - ret = dst->internal->hw_type->frames_derive_to(dst, src, flags); - if (ret == AVERROR(ENOSYS)) - ret = 0; - if (ret) - goto fail; - - *derived_frame_ctx = dst_ref; - return 0; - -fail: - if (dst) - av_buffer_unref(&dst->internal->source_frames); - av_buffer_unref(&dst_ref); - return ret; -} |