diff options
Diffstat (limited to 'media/ffvpx/libavutil/hwcontext.c')
| -rw-r--r-- | media/ffvpx/libavutil/hwcontext.c | 955 |
1 files changed, 955 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/hwcontext.c b/media/ffvpx/libavutil/hwcontext.c new file mode 100644 index 0000000000..3396598269 --- /dev/null +++ b/media/ffvpx/libavutil/hwcontext.c @@ -0,0 +1,955 @@ +/* + * 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 "avassert.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 +#if CONFIG_VULKAN + &ff_hwcontext_type_vulkan, +#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", + [AV_HWDEVICE_TYPE_VULKAN] = "vulkan", +}; + +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_calloc(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; + AVFrame *frame_tmp; + int ret = 0; + + if (!src->hw_frames_ctx) + return AVERROR(EINVAL); + ctx = (AVHWFramesContext*)src->hw_frames_ctx->data; + + 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, 0); + 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); + + /* + * Hardware -> Hardware Transfer. + * Unlike Software -> Hardware or Hardware -> Software, the transfer + * function could be provided by either the src or dst, depending on + * the specific combination of hardware. + */ + if (src->hw_frames_ctx && dst->hw_frames_ctx) { + AVHWFramesContext *src_ctx = + (AVHWFramesContext*)src->hw_frames_ctx->data; + AVHWFramesContext *dst_ctx = + (AVHWFramesContext*)dst->hw_frames_ctx->data; + + if (src_ctx->internal->source_frames) { + av_log(src_ctx, AV_LOG_ERROR, + "A device with a derived frame context cannot be used as " + "the source of a HW -> HW transfer."); + return AVERROR(ENOSYS); + } + + if (dst_ctx->internal->source_frames) { + av_log(src_ctx, AV_LOG_ERROR, + "A device with a derived frame context cannot be used as " + "the destination of a HW -> HW transfer."); + return AVERROR(ENOSYS); + } + + ret = src_ctx->internal->hw_type->transfer_data_from(src_ctx, dst, src); + if (ret == AVERROR(ENOSYS)) + ret = dst_ctx->internal->hw_type->transfer_data_to(dst_ctx, dst, src); + if (ret < 0) + return ret; + } else { + 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; + } + + frame->extended_data = frame->data; + + 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_opts(AVBufferRef **dst_ref_ptr, + enum AVHWDeviceType type, + AVBufferRef *src_ref, + AVDictionary *options, 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, + options, + 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; + } + ret = av_hwdevice_ctx_init(dst_ref); + if (ret < 0) + 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; +} + +int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ref_ptr, + enum AVHWDeviceType type, + AVBufferRef *src_ref, int flags) +{ + return av_hwdevice_ctx_create_derived_opts(dst_ref_ptr, type, src_ref, + NULL, flags); +} + +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) +{ + AVBufferRef *orig_dst_frames = dst->hw_frames_ctx; + enum AVPixelFormat orig_dst_fmt = dst->format; + 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 >= 0) + return ret; + else if (ret != AVERROR(ENOSYS)) + goto fail; + } + } + + 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 >= 0) + return ret; + else if (ret != AVERROR(ENOSYS)) + goto fail; + } + } + + return AVERROR(ENOSYS); + +fail: + // if the caller provided dst frames context, it should be preserved + // by this function + av_assert0(orig_dst_frames == NULL || + orig_dst_frames == dst->hw_frames_ctx); + + // preserve user-provided dst frame fields, but clean + // anything we might have set + dst->hw_frames_ctx = NULL; + av_frame_unref(dst); + + dst->hw_frames_ctx = orig_dst_frames; + dst->format = orig_dst_fmt; + + return ret; +} + +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; +} + +int ff_hwframe_map_replace(AVFrame *dst, const AVFrame *src) +{ + HWMapDescriptor *hwmap = (HWMapDescriptor*)dst->buf[0]->data; + av_frame_unref(hwmap->source); + return av_frame_ref(hwmap->source, src); +} |