vaapi: Add MJPEG decode hwaccel

1 files changed, 159 insertions, 0 deletions

diff --git a/libavcodec/vaapi_mjpeg.c b/libavcodec/vaapi_mjpeg.c
new file mode 100644
index 0000000000..14e0206ae1
--- /dev/null
+++ b/libavcodec/vaapi_mjpeg.c
@@ -0,0 +1,159 @@
+/*
+ * 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 <va/va.h>
+#include <va/va_dec_jpeg.h>
+
+#include "hwaccel.h"
+#include "vaapi_decode.h"
+#include "mjpegdec.h"
+
+static int vaapi_mjpeg_start_frame(AVCodecContext          *avctx,
+                                   av_unused const uint8_t *buffer,
+                                   av_unused uint32_t       size)
+{
+    const MJpegDecodeContext *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->hwaccel_picture_private;
+    VAPictureParameterBufferJPEGBaseline pp;
+    int err, i;
+
+    pic->output_surface = ff_vaapi_get_surface_id(s->picture_ptr);
+
+    pp = (VAPictureParameterBufferJPEGBaseline) {
+        .picture_width  = avctx->width,
+        .picture_height = avctx->height,
+
+        .num_components = s->nb_components,
+    };
+
+    for (i = 0; i < s->nb_components; i++) {
+        pp.components[i].component_id             = s->component_id[i];
+        pp.components[i].h_sampling_factor        = s->h_count[i];
+        pp.components[i].v_sampling_factor        = s->v_count[i];
+        pp.components[i].quantiser_table_selector = s->quant_index[i];
+    }
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAPictureParameterBufferType,
+                                            &pp, sizeof(pp));
+    if (err < 0)
+        goto fail;
+
+    return 0;
+
+fail:
+    ff_vaapi_decode_cancel(avctx, pic);
+    return err;
+}
+
+static int vaapi_mjpeg_end_frame(AVCodecContext *avctx)
+{
+    const MJpegDecodeContext *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->hwaccel_picture_private;
+
+    return ff_vaapi_decode_issue(avctx, pic);
+}
+
+static int vaapi_mjpeg_decode_slice(AVCodecContext *avctx,
+                                    const uint8_t  *buffer,
+                                    uint32_t        size)
+{
+    const MJpegDecodeContext *s = avctx->priv_data;
+    VAAPIDecodePicture *pic = s->hwaccel_picture_private;
+    VAHuffmanTableBufferJPEGBaseline huff;
+    VAIQMatrixBufferJPEGBaseline quant;
+    VASliceParameterBufferJPEGBaseline sp;
+    int err, i, j;
+
+    memset(&huff, 0, sizeof(huff));
+    for (i = 0; i < 2; i++) {
+        huff.load_huffman_table[i] = 1;
+        for (j = 0; j < 16; j++)
+            huff.huffman_table[i].num_dc_codes[j] = s->raw_huffman_lengths[0][i][j];
+        for (j = 0; j < 12; j++)
+            huff.huffman_table[i].dc_values[j] = s->raw_huffman_values[0][i][j];
+        for (j = 0; j < 16; j++)
+            huff.huffman_table[i].num_ac_codes[j] = s->raw_huffman_lengths[1][i][j];
+        for (j = 0; j < 162; j++)
+            huff.huffman_table[i].ac_values[j] = s->raw_huffman_values[1][i][j];
+    }
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAHuffmanTableBufferType,
+                                            &huff, sizeof(huff));
+    if (err < 0)
+        goto fail;
+
+    memset(&quant, 0, sizeof(quant));
+    for (i = 0; i < 4; i++) {
+        quant.load_quantiser_table[i] = 1;
+        for (j = 0; j < 64; j++)
+            quant.quantiser_table[i][j] = s->quant_matrixes[i][j];
+    }
+
+    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
+                                            VAIQMatrixBufferType,
+                                            &quant, sizeof(quant));
+    if (err < 0)
+        goto fail;
+
+    sp = (VASliceParameterBufferJPEGBaseline) {
+        .slice_data_size   = size,
+        .slice_data_offset = 0,
+        .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
+
+        .slice_horizontal_position = 0,
+        .slice_vertical_position   = 0,
+
+        .restart_interval          = s->restart_interval,
+        .num_mcus                  = s->mb_width * s->mb_height,
+    };
+
+    sp.num_components = s->nb_components;
+    for (i = 0; i < s->nb_components; i++) {
+        sp.components[i].component_selector = s->component_id[s->comp_index[i]];
+        sp.components[i].dc_table_selector  = s->dc_index[i];
+        sp.components[i].ac_table_selector  = s->ac_index[i];
+    }
+
+    err = ff_vaapi_decode_make_slice_buffer(avctx, pic, &sp, sizeof(sp), buffer, size);
+    if (err)
+        goto fail;
+
+    return 0;
+
+fail:
+    ff_vaapi_decode_cancel(avctx, pic);
+    return err;
+}
+
+const AVHWAccel ff_mjpeg_vaapi_hwaccel = {
+    .name                 = "mjpeg_vaapi",
+    .type                 = AVMEDIA_TYPE_VIDEO,
+    .id                   = AV_CODEC_ID_MJPEG,
+    .pix_fmt              = AV_PIX_FMT_VAAPI,
+    .start_frame          = &vaapi_mjpeg_start_frame,
+    .end_frame            = &vaapi_mjpeg_end_frame,
+    .decode_slice         = &vaapi_mjpeg_decode_slice,
+    .frame_priv_data_size = sizeof(VAAPIDecodePicture),
+    .init                 = &ff_vaapi_decode_init,
+    .uninit               = &ff_vaapi_decode_uninit,
+    .frame_params         = &ff_vaapi_common_frame_params,
+    .priv_data_size       = sizeof(VAAPIDecodeContext),
+    .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
+};