adding ffmpeg specific version

1 files changed, 237 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/vda_h264.c b/ffmpeg1/libavcodec/vda_h264.c
new file mode 100644
index 0000000..d0237c2
--- /dev/null
+++ b/ffmpeg1/libavcodec/vda_h264.c
@@ -0,0 +1,237 @@
+/*
+ * VDA H264 HW acceleration.
+ *
+ * copyright (c) 2011 Sebastien Zwickert
+ *
+ * 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 <CoreFoundation/CFDictionary.h>
+#include <CoreFoundation/CFNumber.h>
+#include <CoreFoundation/CFData.h>
+
+#include "vda.h"
+#include "libavutil/avutil.h"
+#include "h264.h"
+
+
+/* Decoder callback that adds the vda frame to the queue in display order. */
+static void vda_decoder_callback (void *vda_hw_ctx,
+                                  CFDictionaryRef user_info,
+                                  OSStatus status,
+                                  uint32_t infoFlags,
+                                  CVImageBufferRef image_buffer)
+{
+    struct vda_context *vda_ctx = vda_hw_ctx;
+
+    if (!image_buffer)
+        return;
+
+    if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
+        return;
+
+    vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
+}
+
+static int vda_sync_decode(struct vda_context *vda_ctx)
+{
+    OSStatus status;
+    CFDataRef coded_frame;
+    uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
+
+    coded_frame = CFDataCreate(kCFAllocatorDefault,
+                               vda_ctx->priv_bitstream,
+                               vda_ctx->priv_bitstream_size);
+
+    status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
+
+    if (kVDADecoderNoErr == status)
+        status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
+
+    CFRelease(coded_frame);
+
+    return status;
+}
+
+
+static int vda_h264_start_frame(AVCodecContext *avctx,
+                                av_unused const uint8_t *buffer,
+                                av_unused uint32_t size)
+{
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
+
+    if (!vda_ctx->decoder)
+        return -1;
+
+    vda_ctx->priv_bitstream_size = 0;
+
+    return 0;
+}
+
+static int vda_h264_decode_slice(AVCodecContext *avctx,
+                                 const uint8_t *buffer,
+                                 uint32_t size)
+{
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
+    void *tmp;
+
+    if (!vda_ctx->decoder)
+        return -1;
+
+    tmp = av_fast_realloc(vda_ctx->priv_bitstream,
+                          &vda_ctx->priv_allocated_size,
+                          vda_ctx->priv_bitstream_size + size + 4);
+    if (!tmp)
+        return AVERROR(ENOMEM);
+
+    vda_ctx->priv_bitstream = tmp;
+
+    AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
+    memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);
+
+    vda_ctx->priv_bitstream_size += size + 4;
+
+    return 0;
+}
+
+static int vda_h264_end_frame(AVCodecContext *avctx)
+{
+    H264Context *h                      = avctx->priv_data;
+    struct vda_context *vda_ctx         = avctx->hwaccel_context;
+    AVFrame *frame                      = &h->cur_pic_ptr->f;
+    int status;
+
+    if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
+        return -1;
+
+    status = vda_sync_decode(vda_ctx);
+    frame->data[3] = (void*)vda_ctx->cv_buffer;
+
+    if (status)
+        av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
+
+    return status;
+}
+
+int ff_vda_create_decoder(struct vda_context *vda_ctx,
+                          uint8_t *extradata,
+                          int extradata_size)
+{
+    OSStatus status;
+    CFNumberRef height;
+    CFNumberRef width;
+    CFNumberRef format;
+    CFDataRef avc_data;
+    CFMutableDictionaryRef config_info;
+    CFMutableDictionaryRef buffer_attributes;
+    CFMutableDictionaryRef io_surface_properties;
+    CFNumberRef cv_pix_fmt;
+
+    vda_ctx->priv_bitstream = NULL;
+    vda_ctx->priv_allocated_size = 0;
+
+    /* Each VCL NAL in the bitstream sent to the decoder
+     * is preceded by a 4 bytes length header.
+     * Change the avcC atom header if needed, to signal headers of 4 bytes. */
+    if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
+        uint8_t *rw_extradata;
+
+        if (!(rw_extradata = av_malloc(extradata_size)))
+            return AVERROR(ENOMEM);
+
+        memcpy(rw_extradata, extradata, extradata_size);
+
+        rw_extradata[4] |= 0x03;
+
+        avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
+
+        av_freep(&rw_extradata);
+    } else {
+        avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
+    }
+
+    config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
+                                            4,
+                                            &kCFTypeDictionaryKeyCallBacks,
+                                            &kCFTypeDictionaryValueCallBacks);
+
+    height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
+    width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
+    format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
+
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
+
+    buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
+                                                  2,
+                                                  &kCFTypeDictionaryKeyCallBacks,
+                                                  &kCFTypeDictionaryValueCallBacks);
+    io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
+                                                      0,
+                                                      &kCFTypeDictionaryKeyCallBacks,
+                                                      &kCFTypeDictionaryValueCallBacks);
+    cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
+                                 kCFNumberSInt32Type,
+                                 &vda_ctx->cv_pix_fmt_type);
+    CFDictionarySetValue(buffer_attributes,
+                         kCVPixelBufferPixelFormatTypeKey,
+                         cv_pix_fmt);
+    CFDictionarySetValue(buffer_attributes,
+                         kCVPixelBufferIOSurfacePropertiesKey,
+                         io_surface_properties);
+
+    status = VDADecoderCreate(config_info,
+                              buffer_attributes,
+                              vda_decoder_callback,
+                              vda_ctx,
+                              &vda_ctx->decoder);
+
+    CFRelease(height);
+    CFRelease(width);
+    CFRelease(format);
+    CFRelease(avc_data);
+    CFRelease(config_info);
+    CFRelease(io_surface_properties);
+    CFRelease(cv_pix_fmt);
+    CFRelease(buffer_attributes);
+
+    return status;
+}
+
+int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
+{
+    OSStatus status = kVDADecoderNoErr;
+
+    if (vda_ctx->decoder)
+        status = VDADecoderDestroy(vda_ctx->decoder);
+
+    av_freep(&vda_ctx->priv_bitstream);
+
+    return status;
+}
+
+AVHWAccel ff_h264_vda_hwaccel = {
+    .name           = "h264_vda",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_H264,
+    .pix_fmt        = AV_PIX_FMT_VDA_VLD,
+    .start_frame    = vda_h264_start_frame,
+    .decode_slice   = vda_h264_decode_slice,
+    .end_frame      = vda_h264_end_frame,
+};