| /* |
| * Copyright (c) 2012, Xidorn Quan |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * H.264 decoder via VDA |
| * @author Xidorn Quan <quanxunzhen@gmail.com> |
| */ |
| |
| #include <string.h> |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| #include "vda.h" |
| #include "h264.h" |
| #include "avcodec.h" |
| |
| #ifndef kCFCoreFoundationVersionNumber10_7 |
| #define kCFCoreFoundationVersionNumber10_7 635.00 |
| #endif |
| |
| extern AVCodec ff_h264_decoder, ff_h264_vda_decoder; |
| |
| static const enum AVPixelFormat vda_pixfmts_prior_10_7[] = { |
| AV_PIX_FMT_UYVY422, |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static const enum AVPixelFormat vda_pixfmts[] = { |
| AV_PIX_FMT_UYVY422, |
| AV_PIX_FMT_YUYV422, |
| AV_PIX_FMT_NV12, |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| typedef struct { |
| H264Context h264ctx; |
| int h264_initialized; |
| struct vda_context vda_ctx; |
| enum AVPixelFormat pix_fmt; |
| } VDADecoderContext; |
| |
| static enum AVPixelFormat get_format(struct AVCodecContext *avctx, |
| const enum AVPixelFormat *fmt) |
| { |
| return AV_PIX_FMT_VDA_VLD; |
| } |
| |
| static int get_buffer(AVCodecContext *avctx, AVFrame *pic) |
| { |
| pic->type = FF_BUFFER_TYPE_USER; |
| pic->data[0] = (void *)1; |
| return 0; |
| } |
| |
| static void release_buffer(AVCodecContext *avctx, AVFrame *pic) |
| { |
| int i; |
| |
| CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3]; |
| CVPixelBufferUnlockBaseAddress(cv_buffer, 0); |
| CVPixelBufferRelease(cv_buffer); |
| |
| for (i = 0; i < 4; i++) |
| pic->data[i] = NULL; |
| } |
| |
| static int vdadec_decode(AVCodecContext *avctx, |
| void *data, int *got_frame, AVPacket *avpkt) |
| { |
| VDADecoderContext *ctx = avctx->priv_data; |
| AVFrame *pic = data; |
| int ret; |
| |
| ret = ff_h264_decoder.decode(avctx, data, got_frame, avpkt); |
| if (*got_frame) { |
| CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3]; |
| CVPixelBufferLockBaseAddress(cv_buffer, 0); |
| pic->format = ctx->pix_fmt; |
| if (CVPixelBufferIsPlanar(cv_buffer)) { |
| int i, count = CVPixelBufferGetPlaneCount(cv_buffer); |
| av_assert0(count < 4); |
| for (i = 0; i < count; i++) { |
| pic->data[i] = CVPixelBufferGetBaseAddressOfPlane(cv_buffer, i); |
| pic->linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(cv_buffer, i); |
| } |
| } else { |
| pic->data[0] = CVPixelBufferGetBaseAddress(cv_buffer); |
| pic->linesize[0] = CVPixelBufferGetBytesPerRow(cv_buffer); |
| } |
| } |
| avctx->pix_fmt = ctx->pix_fmt; |
| |
| return ret; |
| } |
| |
| static av_cold int vdadec_close(AVCodecContext *avctx) |
| { |
| VDADecoderContext *ctx = avctx->priv_data; |
| /* release buffers and decoder */ |
| ff_vda_destroy_decoder(&ctx->vda_ctx); |
| /* close H.264 decoder */ |
| if (ctx->h264_initialized) |
| ff_h264_decoder.close(avctx); |
| return 0; |
| } |
| |
| static av_cold int check_format(AVCodecContext *avctx) |
| { |
| AVCodecParserContext *parser; |
| uint8_t *pout; |
| int psize; |
| int index; |
| H264Context *h; |
| int ret = -1; |
| |
| /* init parser & parse file */ |
| parser = av_parser_init(avctx->codec->id); |
| if (!parser) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 parser.\n"); |
| goto final; |
| } |
| parser->flags = PARSER_FLAG_COMPLETE_FRAMES; |
| index = av_parser_parse2(parser, avctx, &pout, &psize, NULL, 0, 0, 0, 0); |
| if (index < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to parse this file.\n"); |
| goto release_parser; |
| } |
| |
| /* check if support */ |
| h = parser->priv_data; |
| switch (h->sps.bit_depth_luma) { |
| case 8: |
| if (!CHROMA444 && !CHROMA422) { |
| // only this will H.264 decoder switch to hwaccel |
| ret = 0; |
| break; |
| } |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unsupported file.\n"); |
| } |
| |
| release_parser: |
| av_parser_close(parser); |
| |
| final: |
| return ret; |
| } |
| |
| static av_cold int vdadec_init(AVCodecContext *avctx) |
| { |
| VDADecoderContext *ctx = avctx->priv_data; |
| struct vda_context *vda_ctx = &ctx->vda_ctx; |
| OSStatus status; |
| int ret; |
| |
| ctx->h264_initialized = 0; |
| |
| /* init pix_fmts of codec */ |
| if (!ff_h264_vda_decoder.pix_fmts) { |
| if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber10_7) |
| ff_h264_vda_decoder.pix_fmts = vda_pixfmts_prior_10_7; |
| else |
| ff_h264_vda_decoder.pix_fmts = vda_pixfmts; |
| } |
| |
| /* check if VDA supports this file */ |
| if (check_format(avctx) < 0) |
| goto failed; |
| |
| /* init vda */ |
| memset(vda_ctx, 0, sizeof(struct vda_context)); |
| vda_ctx->width = avctx->width; |
| vda_ctx->height = avctx->height; |
| vda_ctx->format = 'avc1'; |
| vda_ctx->use_sync_decoding = 1; |
| ctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts); |
| switch (ctx->pix_fmt) { |
| case AV_PIX_FMT_UYVY422: |
| vda_ctx->cv_pix_fmt_type = '2vuy'; |
| break; |
| case AV_PIX_FMT_YUYV422: |
| vda_ctx->cv_pix_fmt_type = 'yuvs'; |
| break; |
| case AV_PIX_FMT_NV12: |
| vda_ctx->cv_pix_fmt_type = '420v'; |
| break; |
| case AV_PIX_FMT_YUV420P: |
| vda_ctx->cv_pix_fmt_type = 'y420'; |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format: %d\n", avctx->pix_fmt); |
| goto failed; |
| } |
| status = ff_vda_create_decoder(vda_ctx, |
| avctx->extradata, avctx->extradata_size); |
| if (status != kVDADecoderNoErr) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Failed to init VDA decoder: %d.\n", status); |
| goto failed; |
| } |
| avctx->hwaccel_context = vda_ctx; |
| |
| /* changes callback functions */ |
| avctx->get_format = get_format; |
| avctx->get_buffer = get_buffer; |
| avctx->release_buffer = release_buffer; |
| |
| /* init H.264 decoder */ |
| ret = ff_h264_decoder.init(avctx); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 decoder.\n"); |
| goto failed; |
| } |
| ctx->h264_initialized = 1; |
| |
| return 0; |
| |
| failed: |
| vdadec_close(avctx); |
| return -1; |
| } |
| |
| static void vdadec_flush(AVCodecContext *avctx) |
| { |
| return ff_h264_decoder.flush(avctx); |
| } |
| |
| AVCodec ff_h264_vda_decoder = { |
| .name = "h264_vda", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_H264, |
| .priv_data_size = sizeof(VDADecoderContext), |
| .init = vdadec_init, |
| .close = vdadec_close, |
| .decode = vdadec_decode, |
| .capabilities = CODEC_CAP_DELAY, |
| .flush = vdadec_flush, |
| .long_name = NULL_IF_CONFIG_SMALL("H.264 (VDA acceleration)"), |
| }; |