mirror of https://git.ffmpeg.org/ffmpeg.git
275 lines
7.6 KiB
C
275 lines
7.6 KiB
C
/*
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* Copyright (c) 2012, Xidorn Quan
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.264 decoder via VDA
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* @author Xidorn Quan <quanxunzhen@gmail.com>
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*/
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#include <string.h>
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#include <CoreFoundation/CoreFoundation.h>
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#include "vda.h"
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#include "h264.h"
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#include "avcodec.h"
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#ifndef kCFCoreFoundationVersionNumber10_7
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#define kCFCoreFoundationVersionNumber10_7 635.00
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#endif
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extern AVCodec ff_h264_decoder, ff_h264_vda_decoder;
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static const enum AVPixelFormat vda_pixfmts_prior_10_7[] = {
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AV_PIX_FMT_UYVY422,
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat vda_pixfmts[] = {
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AV_PIX_FMT_UYVY422,
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AV_PIX_FMT_YUYV422,
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AV_PIX_FMT_NV12,
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE
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};
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typedef struct {
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H264Context h264ctx;
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int h264_initialized;
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struct vda_context vda_ctx;
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enum AVPixelFormat pix_fmt;
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} VDADecoderContext;
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static enum AVPixelFormat get_format(struct AVCodecContext *avctx,
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const enum AVPixelFormat *fmt)
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{
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return AV_PIX_FMT_VDA_VLD;
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}
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typedef struct {
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CVPixelBufferRef cv_buffer;
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} VDABufferContext;
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static void release_buffer(void *opaque, uint8_t *data)
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{
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VDABufferContext *context = opaque;
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CVPixelBufferUnlockBaseAddress(context->cv_buffer, 0);
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CVPixelBufferRelease(context->cv_buffer);
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av_free(context);
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}
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static int get_buffer2(AVCodecContext *avctx, AVFrame *pic, int flag)
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{
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VDABufferContext *context = av_mallocz(sizeof(VDABufferContext));
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AVBufferRef *buffer = av_buffer_create(NULL, 0, release_buffer, context, 0);
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if (!context || !buffer) {
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av_free(context);
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return AVERROR(ENOMEM);
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}
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pic->buf[0] = buffer;
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pic->data[0] = (void *)1;
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return 0;
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}
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static int vdadec_decode(AVCodecContext *avctx,
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void *data, int *got_frame, AVPacket *avpkt)
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{
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VDADecoderContext *ctx = avctx->priv_data;
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AVFrame *pic = data;
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int ret;
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ret = ff_h264_decoder.decode(avctx, data, got_frame, avpkt);
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if (*got_frame) {
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AVBufferRef *buffer = pic->buf[0];
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VDABufferContext *context = av_buffer_get_opaque(buffer);
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CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3];
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CVPixelBufferRetain(cv_buffer);
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CVPixelBufferLockBaseAddress(cv_buffer, 0);
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context->cv_buffer = cv_buffer;
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pic->format = ctx->pix_fmt;
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if (CVPixelBufferIsPlanar(cv_buffer)) {
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int i, count = CVPixelBufferGetPlaneCount(cv_buffer);
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av_assert0(count < 4);
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for (i = 0; i < count; i++) {
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pic->data[i] = CVPixelBufferGetBaseAddressOfPlane(cv_buffer, i);
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pic->linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(cv_buffer, i);
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}
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} else {
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pic->data[0] = CVPixelBufferGetBaseAddress(cv_buffer);
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pic->linesize[0] = CVPixelBufferGetBytesPerRow(cv_buffer);
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}
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}
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avctx->pix_fmt = ctx->pix_fmt;
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return ret;
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}
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static av_cold int vdadec_close(AVCodecContext *avctx)
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{
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VDADecoderContext *ctx = avctx->priv_data;
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/* release buffers and decoder */
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ff_vda_destroy_decoder(&ctx->vda_ctx);
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/* close H.264 decoder */
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if (ctx->h264_initialized)
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ff_h264_decoder.close(avctx);
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return 0;
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}
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static av_cold int check_format(AVCodecContext *avctx)
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{
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AVCodecParserContext *parser;
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uint8_t *pout;
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int psize;
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int index;
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H264Context *h;
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int ret = -1;
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/* init parser & parse file */
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parser = av_parser_init(avctx->codec->id);
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if (!parser) {
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av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 parser.\n");
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goto final;
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}
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parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
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index = av_parser_parse2(parser, avctx, &pout, &psize, NULL, 0, 0, 0, 0);
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if (index < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed to parse this file.\n");
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goto release_parser;
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}
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/* check if support */
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h = parser->priv_data;
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switch (h->sps.bit_depth_luma) {
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case 8:
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if (!CHROMA444(h) && !CHROMA422(h)) {
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// only this will H.264 decoder switch to hwaccel
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ret = 0;
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break;
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}
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported file.\n");
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}
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release_parser:
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av_parser_close(parser);
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final:
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return ret;
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}
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static av_cold int vdadec_init(AVCodecContext *avctx)
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{
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VDADecoderContext *ctx = avctx->priv_data;
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struct vda_context *vda_ctx = &ctx->vda_ctx;
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OSStatus status;
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int ret;
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ctx->h264_initialized = 0;
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/* init pix_fmts of codec */
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if (!ff_h264_vda_decoder.pix_fmts) {
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if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber10_7)
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ff_h264_vda_decoder.pix_fmts = vda_pixfmts_prior_10_7;
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else
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ff_h264_vda_decoder.pix_fmts = vda_pixfmts;
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}
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/* check if VDA supports this file */
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if (check_format(avctx) < 0)
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goto failed;
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/* init vda */
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memset(vda_ctx, 0, sizeof(struct vda_context));
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vda_ctx->width = avctx->width;
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vda_ctx->height = avctx->height;
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vda_ctx->format = 'avc1';
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vda_ctx->use_sync_decoding = 1;
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vda_ctx->use_ref_buffer = 1;
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ctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);
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switch (ctx->pix_fmt) {
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case AV_PIX_FMT_UYVY422:
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vda_ctx->cv_pix_fmt_type = '2vuy';
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break;
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case AV_PIX_FMT_YUYV422:
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vda_ctx->cv_pix_fmt_type = 'yuvs';
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break;
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case AV_PIX_FMT_NV12:
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vda_ctx->cv_pix_fmt_type = '420v';
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break;
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case AV_PIX_FMT_YUV420P:
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vda_ctx->cv_pix_fmt_type = 'y420';
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format: %d\n", avctx->pix_fmt);
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goto failed;
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}
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status = ff_vda_create_decoder(vda_ctx,
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avctx->extradata, avctx->extradata_size);
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if (status != kVDADecoderNoErr) {
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av_log(avctx, AV_LOG_ERROR,
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"Failed to init VDA decoder: %d.\n", status);
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goto failed;
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}
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avctx->hwaccel_context = vda_ctx;
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/* changes callback functions */
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avctx->get_format = get_format;
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avctx->get_buffer2 = get_buffer2;
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#if FF_API_GET_BUFFER
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// force the old get_buffer to be empty
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avctx->get_buffer = NULL;
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#endif
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/* init H.264 decoder */
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ret = ff_h264_decoder.init(avctx);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 decoder.\n");
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goto failed;
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}
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ctx->h264_initialized = 1;
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return 0;
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failed:
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vdadec_close(avctx);
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return -1;
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}
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static void vdadec_flush(AVCodecContext *avctx)
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{
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return ff_h264_decoder.flush(avctx);
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}
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AVCodec ff_h264_vda_decoder = {
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.name = "h264_vda",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H264,
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.priv_data_size = sizeof(VDADecoderContext),
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.init = vdadec_init,
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.close = vdadec_close,
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.decode = vdadec_decode,
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.capabilities = CODEC_CAP_DELAY,
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.flush = vdadec_flush,
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.long_name = NULL_IF_CONFIG_SMALL("H.264 (VDA acceleration)"),
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};
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