/* * 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; } typedef struct { CVPixelBufferRef cv_buffer; } VDABufferContext; static void release_buffer(void *opaque, uint8_t *data) { VDABufferContext *context = opaque; CVPixelBufferUnlockBaseAddress(context->cv_buffer, 0); CVPixelBufferRelease(context->cv_buffer); av_free(context); } static int get_buffer2(AVCodecContext *avctx, AVFrame *pic, int flag) { VDABufferContext *context = av_mallocz(sizeof(VDABufferContext)); AVBufferRef *buffer = av_buffer_create(NULL, 0, release_buffer, context, 0); if (!context || !buffer) { av_free(context); return AVERROR(ENOMEM); } pic->buf[0] = buffer; pic->data[0] = (void *)1; return 0; } 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) { AVBufferRef *buffer = pic->buf[0]; VDABufferContext *context = av_buffer_get_opaque(buffer); CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3]; CVPixelBufferRetain(cv_buffer); CVPixelBufferLockBaseAddress(cv_buffer, 0); context->cv_buffer = cv_buffer; 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 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; } /* 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; vda_ctx->use_ref_buffer = 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_buffer2 = get_buffer2; #if FF_API_GET_BUFFER // force the old get_buffer to be empty avctx->get_buffer = NULL; #endif /* 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)"), };