---
Now just writes the hw_device_ctx field (no unrefs).

 avconv_vaapi.c | 128 ++++++---------------------------------------------------
 1 file changed, 13 insertions(+), 115 deletions(-)

diff --git a/avconv_vaapi.c b/avconv_vaapi.c
index 584b8b4df..13e8a8a71 100644
--- a/avconv_vaapi.c
+++ b/avconv_vaapi.c
@@ -26,41 +26,15 @@
 #include "avconv.h"
 
 
-static AVClass vaapi_class = {
-    .class_name = "vaapi",
-    .item_name  = av_default_item_name,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-
-#define DEFAULT_SURFACES 20
-
-typedef struct VAAPIDecoderContext {
-    const AVClass *class;
-
-    AVBufferRef       *device_ref;
-    AVHWDeviceContext *device;
-    AVBufferRef       *frames_ref;
-    AVHWFramesContext *frames;
-
-    // The output need not have the same format, width and height as the
-    // decoded frames - the copy for non-direct-mapped access is actually
-    // a whole vpp instance which can do arbitrary scaling and format
-    // conversion.
-    enum AVPixelFormat output_format;
-} VAAPIDecoderContext;
-
-
 static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
 {
-    InputStream *ist = avctx->opaque;
-    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
     int err;
 
-    err = av_hwframe_get_buffer(ctx->frames_ref, frame, 0);
+    err = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
     if (err < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n");
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n");
     } else {
-        av_log(ctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n",
+        av_log(avctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n",
                (unsigned int)(uintptr_t)frame->data[3]);
     }
     return err;
@@ -69,29 +43,29 @@ static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame 
*frame, int flags)
 static int vaapi_retrieve_data(AVCodecContext *avctx, AVFrame *input)
 {
     InputStream *ist = avctx->opaque;
-    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
     AVFrame *output = 0;
+    enum AVPixelFormat output_format = ist->hwaccel_output_format;
     int err;
 
     av_assert0(input->format == AV_PIX_FMT_VAAPI);
 
-    if (ctx->output_format == AV_PIX_FMT_VAAPI) {
+    if (output_format == AV_PIX_FMT_VAAPI) {
         // Nothing to do.
         return 0;
     }
 
-    av_log(ctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n",
+    av_log(avctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n",
            (unsigned int)(uintptr_t)input->data[3]);
 
     output = av_frame_alloc();
     if (!output)
         return AVERROR(ENOMEM);
 
-    output->format = ctx->output_format;
+    output->format = output_format;
 
     err = av_hwframe_transfer_data(output, input, 0);
     if (err < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Failed to transfer data to "
+        av_log(avctx, AV_LOG_ERROR, "Failed to transfer data to "
                "output frame: %d.\n", err);
         goto fail;
     }
@@ -114,35 +88,10 @@ fail:
     return err;
 }
 
-static void vaapi_decode_uninit(AVCodecContext *avctx)
-{
-    InputStream *ist = avctx->opaque;
-    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
-
-    if (ctx) {
-        av_buffer_unref(&ctx->frames_ref);
-        av_buffer_unref(&ctx->device_ref);
-        av_free(ctx);
-    }
-
-    av_buffer_unref(&ist->hw_frames_ctx);
-
-    ist->hwaccel_ctx           = NULL;
-    ist->hwaccel_uninit        = NULL;
-    ist->hwaccel_get_buffer    = NULL;
-    ist->hwaccel_retrieve_data = NULL;
-}
-
 int vaapi_decode_init(AVCodecContext *avctx)
 {
     InputStream *ist = avctx->opaque;
-    VAAPIDecoderContext *ctx;
     int err;
-    int loglevel = (ist->hwaccel_id != HWACCEL_VAAPI ? AV_LOG_VERBOSE
-                                                     : AV_LOG_ERROR);
-
-    if (ist->hwaccel_ctx)
-        vaapi_decode_uninit(avctx);
 
     // We have -hwaccel without -vaapi_device, so just initialise here with
     // the device passed as -hwaccel_device (if -vaapi_device was passed, it
@@ -153,69 +102,18 @@ int vaapi_decode_init(AVCodecContext *avctx)
             return err;
     }
 
-    ctx = av_mallocz(sizeof(*ctx));
-    if (!ctx)
+    avctx->hw_device_ctx = av_buffer_ref(hw_device_ctx);
+    if (!avctx->hw_device_ctx)
         return AVERROR(ENOMEM);
-    ctx->class = &vaapi_class;
-
-    ctx->device_ref = av_buffer_ref(hw_device_ctx);
-    ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
-
-    ctx->output_format = ist->hwaccel_output_format;
-    avctx->pix_fmt = ctx->output_format;
 
-    ctx->frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
-    if (!ctx->frames_ref) {
-        av_log(ctx, loglevel, "Failed to create VAAPI frame context.\n");
-        err = AVERROR(ENOMEM);
-        goto fail;
-    }
-
-    ctx->frames = (AVHWFramesContext*)ctx->frames_ref->data;
-
-    ctx->frames->format = AV_PIX_FMT_VAAPI;
-    ctx->frames->width  = avctx->coded_width;
-    ctx->frames->height = avctx->coded_height;
-
-    // It would be nice if we could query the available formats here,
-    // but unfortunately we don't have a VAConfigID to do it with.
-    // For now, just assume an NV12 format (or P010 if 10-bit).
-    ctx->frames->sw_format = (avctx->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?
-                              AV_PIX_FMT_P010 : AV_PIX_FMT_NV12);
-
-    // For frame-threaded decoding, at least one additional surface
-    // is needed for each thread.
-    ctx->frames->initial_pool_size = DEFAULT_SURFACES;
-    if (avctx->active_thread_type & FF_THREAD_FRAME)
-        ctx->frames->initial_pool_size += avctx->thread_count;
-
-    err = av_hwframe_ctx_init(ctx->frames_ref);
-    if (err < 0) {
-        av_log(ctx, loglevel, "Failed to initialise VAAPI frame "
-               "context: %d\n", err);
-        goto fail;
-    }
-
-    ist->hw_frames_ctx = av_buffer_ref(ctx->frames_ref);
-    if (!ist->hw_frames_ctx) {
-        err = AVERROR(ENOMEM);
-        goto fail;
-    }
-
-    ist->hwaccel_ctx           = ctx;
-    ist->hwaccel_uninit        = &vaapi_decode_uninit;
+    ist->hwaccel_ctx           = NULL;
+    ist->hwaccel_uninit        = NULL;
     ist->hwaccel_get_buffer    = &vaapi_get_buffer;
     ist->hwaccel_retrieve_data = &vaapi_retrieve_data;
 
     return 0;
-
-fail:
-    vaapi_decode_uninit(avctx);
-    return err;
 }
 
-static AVClass *vaapi_log = &vaapi_class;
-
 av_cold int vaapi_device_init(const char *device)
 {
     int err;
@@ -223,7 +121,7 @@ av_cold int vaapi_device_init(const char *device)
     err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
                                  device, NULL, 0);
     if (err < 0) {
-        av_log(&vaapi_log, AV_LOG_ERROR, "Failed to create a VAAPI device\n");
+        av_log(NULL, AV_LOG_ERROR, "Failed to create a VAAPI device\n");
         return err;
     }
 
-- 
2.11.0
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