adding ffmpeg specific version

1 files changed, 143 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/vaapi_mpeg2.c b/ffmpeg1/libavcodec/vaapi_mpeg2.c
new file mode 100644
index 0000000..d626f24
--- /dev/null
+++ b/ffmpeg1/libavcodec/vaapi_mpeg2.c
@@ -0,0 +1,143 @@
+/*
+ * MPEG-2 HW decode acceleration through VA API
+ *
+ * Copyright (C) 2008-2009 Splitted-Desktop Systems
+ *
+ * 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 "vaapi_internal.h"
+
+/** Reconstruct bitstream f_code */
+static inline int mpeg2_get_f_code(MpegEncContext *s)
+{
+    return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
+           (s->mpeg_f_code[1][0] <<  4) |  s->mpeg_f_code[1][1];
+}
+
+/** Determine frame start: first field for field picture or frame picture */
+static inline int mpeg2_get_is_frame_start(MpegEncContext *s)
+{
+    return s->first_field || s->picture_structure == PICT_FRAME;
+}
+
+static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
+{
+    struct MpegEncContext * const s = avctx->priv_data;
+    struct vaapi_context * const vactx = avctx->hwaccel_context;
+    VAPictureParameterBufferMPEG2 *pic_param;
+    VAIQMatrixBufferMPEG2 *iq_matrix;
+    int i;
+
+    av_dlog(avctx, "vaapi_mpeg2_start_frame()\n");
+
+    vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2);
+
+    /* Fill in VAPictureParameterBufferMPEG2 */
+    pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2));
+    if (!pic_param)
+        return -1;
+    pic_param->horizontal_size                                  = s->width;
+    pic_param->vertical_size                                    = s->height;
+    pic_param->forward_reference_picture                        = VA_INVALID_ID;
+    pic_param->backward_reference_picture                       = VA_INVALID_ID;
+    pic_param->picture_coding_type                              = s->pict_type;
+    pic_param->f_code                                           = mpeg2_get_f_code(s);
+    pic_param->picture_coding_extension.value                   = 0; /* reset all bits */
+    pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision;
+    pic_param->picture_coding_extension.bits.picture_structure  = s->picture_structure;
+    pic_param->picture_coding_extension.bits.top_field_first    = s->top_field_first;
+    pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct;
+    pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors;
+    pic_param->picture_coding_extension.bits.q_scale_type       = s->q_scale_type;
+    pic_param->picture_coding_extension.bits.intra_vlc_format   = s->intra_vlc_format;
+    pic_param->picture_coding_extension.bits.alternate_scan     = s->alternate_scan;
+    pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field;
+    pic_param->picture_coding_extension.bits.progressive_frame  = s->progressive_frame;
+    pic_param->picture_coding_extension.bits.is_first_field     = mpeg2_get_is_frame_start(s);
+
+    switch (s->pict_type) {
+    case AV_PICTURE_TYPE_B:
+        pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
+        // fall-through
+    case AV_PICTURE_TYPE_P:
+        pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture);
+        break;
+    }
+
+    /* Fill in VAIQMatrixBufferMPEG2 */
+    iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2));
+    if (!iq_matrix)
+        return -1;
+    iq_matrix->load_intra_quantiser_matrix              = 1;
+    iq_matrix->load_non_intra_quantiser_matrix          = 1;
+    iq_matrix->load_chroma_intra_quantiser_matrix       = 1;
+    iq_matrix->load_chroma_non_intra_quantiser_matrix   = 1;
+
+    for (i = 0; i < 64; i++) {
+        int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
+        iq_matrix->intra_quantiser_matrix[i]            = s->intra_matrix[n];
+        iq_matrix->non_intra_quantiser_matrix[i]        = s->inter_matrix[n];
+        iq_matrix->chroma_intra_quantiser_matrix[i]     = s->chroma_intra_matrix[n];
+        iq_matrix->chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
+    }
+    return 0;
+}
+
+static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
+{
+    MpegEncContext * const s = avctx->priv_data;
+    VASliceParameterBufferMPEG2 *slice_param;
+    GetBitContext gb;
+    uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
+
+    av_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size);
+
+    /* Determine macroblock_offset */
+    init_get_bits(&gb, buffer, 8 * size);
+    if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
+        return AVERROR_INVALIDDATA;
+    quantiser_scale_code = get_bits(&gb, 5);
+    intra_slice_flag = get_bits1(&gb);
+    if (intra_slice_flag) {
+        skip_bits(&gb, 8);
+        while (get_bits1(&gb) != 0)
+            skip_bits(&gb, 8);
+    }
+    macroblock_offset = get_bits_count(&gb);
+
+    /* Fill in VASliceParameterBufferMPEG2 */
+    slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
+    if (!slice_param)
+        return -1;
+    slice_param->macroblock_offset              = macroblock_offset;
+    slice_param->slice_horizontal_position      = s->mb_x;
+    slice_param->slice_vertical_position        = s->mb_y >> (s->picture_structure != PICT_FRAME);
+    slice_param->quantiser_scale_code           = quantiser_scale_code;
+    slice_param->intra_slice_flag               = intra_slice_flag;
+    return 0;
+}
+
+AVHWAccel ff_mpeg2_vaapi_hwaccel = {
+    .name           = "mpeg2_vaapi",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_MPEG2VIDEO,
+    .pix_fmt        = AV_PIX_FMT_VAAPI_VLD,
+    .start_frame    = vaapi_mpeg2_start_frame,
+    .end_frame      = ff_vaapi_mpeg_end_frame,
+    .decode_slice   = vaapi_mpeg2_decode_slice,
+};