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Diffstat (limited to 'libavcodec/vda_h264_dec.c')
-rw-r--r--libavcodec/vda_h264_dec.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/libavcodec/vda_h264_dec.c b/libavcodec/vda_h264_dec.c
new file mode 100644
index 0000000000..3cb13e38fb
--- /dev/null
+++ b/libavcodec/vda_h264_dec.c
@@ -0,0 +1,258 @@
+/*
+ * 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 *data_size, AVPacket *avpkt)
+{
+ VDADecoderContext *ctx = avctx->priv_data;
+ AVFrame *pic = data;
+ int ret;
+
+ ret = ff_h264_decoder.decode(avctx, data, data_size, avpkt);
+ if (*data_size) {
+ 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)"),
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 19:46:04 +0000