| /* |
| * 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 "libavutil/avassert.h" |
| #include "libavutil/frame.h" |
| #include "libavutil/hwcontext.h" |
| #include "libavutil/log.h" |
| |
| #include "ffmpeg.h" |
| |
| |
| static AVClass vaapi_class = { |
| .class_name = "vaapi", |
| .item_name = av_default_item_name, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| #define DEFAULT_SURFACES 20 |
| |
| typedef struct VAAPIDecoderContext { |
| const AVClass *class; |
| |
| AVBufferRef *device_ref; |
| AVHWDeviceContext *device; |
| AVBufferRef *frames_ref; |
| AVHWFramesContext *frames; |
| |
| // The output need not have the same format, width and height as the |
| // decoded frames - the copy for non-direct-mapped access is actually |
| // a whole vpp instance which can do arbitrary scaling and format |
| // conversion. |
| enum AVPixelFormat output_format; |
| } VAAPIDecoderContext; |
| |
| |
| static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) |
| { |
| InputStream *ist = avctx->opaque; |
| VAAPIDecoderContext *ctx = ist->hwaccel_ctx; |
| int err; |
| |
| err = av_hwframe_get_buffer(ctx->frames_ref, frame, 0); |
| if (err < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n"); |
| } else { |
| av_log(ctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n", |
| (unsigned int)(uintptr_t)frame->data[3]); |
| } |
| return err; |
| } |
| |
| static int vaapi_retrieve_data(AVCodecContext *avctx, AVFrame *input) |
| { |
| InputStream *ist = avctx->opaque; |
| VAAPIDecoderContext *ctx = ist->hwaccel_ctx; |
| AVFrame *output = 0; |
| int err; |
| |
| av_assert0(input->format == AV_PIX_FMT_VAAPI); |
| |
| if (ctx->output_format == AV_PIX_FMT_VAAPI) { |
| // Nothing to do. |
| return 0; |
| } |
| |
| av_log(ctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n", |
| (unsigned int)(uintptr_t)input->data[3]); |
| |
| output = av_frame_alloc(); |
| if (!output) |
| return AVERROR(ENOMEM); |
| |
| output->format = ctx->output_format; |
| |
| err = av_hwframe_transfer_data(output, input, 0); |
| if (err < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to transfer data to " |
| "output frame: %d.\n", err); |
| goto fail; |
| } |
| |
| err = av_frame_copy_props(output, input); |
| if (err < 0) { |
| av_frame_unref(output); |
| goto fail; |
| } |
| |
| av_frame_unref(input); |
| av_frame_move_ref(input, output); |
| av_frame_free(&output); |
| |
| return 0; |
| |
| fail: |
| if (output) |
| av_frame_free(&output); |
| return err; |
| } |
| |
| static void vaapi_decode_uninit(AVCodecContext *avctx) |
| { |
| InputStream *ist = avctx->opaque; |
| VAAPIDecoderContext *ctx = ist->hwaccel_ctx; |
| |
| if (ctx) { |
| av_buffer_unref(&ctx->frames_ref); |
| av_buffer_unref(&ctx->device_ref); |
| av_free(ctx); |
| } |
| |
| av_buffer_unref(&ist->hw_frames_ctx); |
| |
| ist->hwaccel_ctx = NULL; |
| ist->hwaccel_uninit = NULL; |
| ist->hwaccel_get_buffer = NULL; |
| ist->hwaccel_retrieve_data = NULL; |
| } |
| |
| int vaapi_decode_init(AVCodecContext *avctx) |
| { |
| InputStream *ist = avctx->opaque; |
| VAAPIDecoderContext *ctx; |
| int err; |
| int loglevel = (ist->hwaccel_id != HWACCEL_VAAPI ? AV_LOG_VERBOSE |
| : AV_LOG_ERROR); |
| |
| if (ist->hwaccel_ctx) |
| vaapi_decode_uninit(avctx); |
| |
| // We have -hwaccel without -vaapi_device, so just initialise here with |
| // the device passed as -hwaccel_device (if -vaapi_device was passed, it |
| // will always have been called before now). |
| if (!hw_device_ctx) { |
| err = vaapi_device_init(ist->hwaccel_device); |
| if (err < 0) |
| return err; |
| } |
| |
| ctx = av_mallocz(sizeof(*ctx)); |
| if (!ctx) |
| return AVERROR(ENOMEM); |
| ctx->class = &vaapi_class; |
| ist->hwaccel_ctx = ctx; |
| |
| ctx->device_ref = av_buffer_ref(hw_device_ctx); |
| ctx->device = (AVHWDeviceContext*)ctx->device_ref->data; |
| |
| ctx->output_format = ist->hwaccel_output_format; |
| avctx->pix_fmt = ctx->output_format; |
| |
| ctx->frames_ref = av_hwframe_ctx_alloc(ctx->device_ref); |
| if (!ctx->frames_ref) { |
| av_log(ctx, loglevel, "Failed to create VAAPI frame context.\n"); |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| ctx->frames = (AVHWFramesContext*)ctx->frames_ref->data; |
| |
| ctx->frames->format = AV_PIX_FMT_VAAPI; |
| ctx->frames->width = avctx->coded_width; |
| ctx->frames->height = avctx->coded_height; |
| |
| // It would be nice if we could query the available formats here, |
| // but unfortunately we don't have a VAConfigID to do it with. |
| // For now, just assume an NV12 format (or P010 if 10-bit). |
| ctx->frames->sw_format = (avctx->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ? |
| AV_PIX_FMT_P010 : AV_PIX_FMT_NV12); |
| |
| // For frame-threaded decoding, at least one additional surface |
| // is needed for each thread. |
| ctx->frames->initial_pool_size = DEFAULT_SURFACES; |
| if (avctx->active_thread_type & FF_THREAD_FRAME) |
| ctx->frames->initial_pool_size += avctx->thread_count; |
| |
| err = av_hwframe_ctx_init(ctx->frames_ref); |
| if (err < 0) { |
| av_log(ctx, loglevel, "Failed to initialise VAAPI frame " |
| "context: %d\n", err); |
| goto fail; |
| } |
| |
| ist->hw_frames_ctx = av_buffer_ref(ctx->frames_ref); |
| if (!ist->hw_frames_ctx) { |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| ist->hwaccel_uninit = &vaapi_decode_uninit; |
| ist->hwaccel_get_buffer = &vaapi_get_buffer; |
| ist->hwaccel_retrieve_data = &vaapi_retrieve_data; |
| |
| return 0; |
| |
| fail: |
| vaapi_decode_uninit(avctx); |
| return err; |
| } |
| |
| static AVClass *vaapi_log = &vaapi_class; |
| |
| av_cold int vaapi_device_init(const char *device) |
| { |
| int err; |
| |
| av_buffer_unref(&hw_device_ctx); |
| |
| err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI, |
| device, NULL, 0); |
| if (err < 0) { |
| av_log(&vaapi_log, AV_LOG_ERROR, "Failed to create a VAAPI device\n"); |
| return err; |
| } |
| |
| return 0; |
| } |