[FFmpeg-devel] [PATCH] HEVC: Export motion vectors to frame side data.
Asaf Kave
kaveasaf at gmail.com
Thu Jan 2 11:59:23 EET 2020
On Sun, Dec 29, 2019 at 4:08 PM Asaf Kave <kaveasaf at gmail.com> wrote:
> ---
> libavcodec/hevc_refs.c | 15 ++++
> libavcodec/hevcdec.c | 173 ++++++++++++++++++++++++++++++++++++++++-
> libavcodec/hevcdec.h | 13 ++++
> 3 files changed, 200 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
> index 7870a72fd6..20f028fa73 100644
> --- a/libavcodec/hevc_refs.c
> +++ b/libavcodec/hevc_refs.c
> @@ -42,6 +42,9 @@ void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame
> *frame, int flags)
> av_buffer_unref(&frame->tab_mvf_buf);
> frame->tab_mvf = NULL;
>
> + av_buffer_unref(&frame->cuh_buf);
> + frame->cuh = NULL;
> +
> av_buffer_unref(&frame->rpl_buf);
> av_buffer_unref(&frame->rpl_tab_buf);
> frame->rpl_tab = NULL;
> @@ -101,11 +104,17 @@ static HEVCFrame *alloc_frame(HEVCContext *s)
> goto fail;
> frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
>
> + frame->cuh_buf = av_buffer_pool_get(s->cuh_pool);
> + if (!frame->cuh_buf)
> + goto fail;
> + frame->cuh = (CodingUnitHelper *)frame->cuh_buf->data;
> +
> frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
> if (!frame->rpl_tab_buf)
> goto fail;
> frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
> frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height;
> + frame->cu_count = 0;
> for (j = 0; j < frame->ctb_count; j++)
> frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
>
> @@ -161,6 +170,10 @@ int ff_hevc_set_new_ref(HEVCContext *s, AVFrame
> **frame, int poc)
> else
> ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
>
> + if (s->avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
> + ref->flags |= HEVC_FRAME_FLAG_MV;
> + }
> +
> ref->poc = poc;
> ref->sequence = s->seq_decode;
> ref->frame->crop_left = s->ps.sps->output_window.left_offset;
> @@ -216,6 +229,8 @@ int ff_hevc_output_frame(HEVCContext *s, AVFrame *out,
> int flush)
> if (ret < 0)
> return ret;
>
> + s->output_frame_poc = frame->poc;
> +
> av_log(s->avctx, AV_LOG_DEBUG,
> "Output frame with POC %d.\n", frame->poc);
> return 1;
> diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
> index 19b0cd815d..aedc559283 100644
> --- a/libavcodec/hevcdec.c
> +++ b/libavcodec/hevcdec.c
> @@ -32,6 +32,7 @@
> #include "libavutil/opt.h"
> #include "libavutil/pixdesc.h"
> #include "libavutil/stereo3d.h"
> +#include "libavutil/motion_vector.h"
>
> #include "bswapdsp.h"
> #include "bytestream.h"
> @@ -80,6 +81,7 @@ static void pic_arrays_free(HEVCContext *s)
> av_freep(&s->sh.offset);
>
> av_buffer_pool_uninit(&s->tab_mvf_pool);
> + av_buffer_pool_uninit(&s->cuh_pool);
> av_buffer_pool_uninit(&s->rpl_tab_pool);
> }
>
> @@ -128,9 +130,11 @@ static int pic_arrays_init(HEVCContext *s, const
> HEVCSPS *sps)
>
> s->tab_mvf_pool = av_buffer_pool_init(min_pu_size * sizeof(MvField),
> av_buffer_allocz);
> + s->cuh_pool = av_buffer_pool_init(min_pu_size *
> sizeof(CodingUnitHelper),
> + av_buffer_allocz);
> s->rpl_tab_pool = av_buffer_pool_init(ctb_count *
> sizeof(RefPicListTab),
> av_buffer_allocz);
> - if (!s->tab_mvf_pool || !s->rpl_tab_pool)
> + if (!s->tab_mvf_pool || !s->rpl_tab_pool || !s->cuh_pool)
> goto fail;
>
> return 0;
> @@ -1806,6 +1810,7 @@ static void hls_prediction_unit(HEVCContext *s, int
> x0, int y0,
> int min_pu_width = s->ps.sps->min_pu_width;
>
> MvField *tab_mvf = s->ref->tab_mvf;
> + CodingUnitHelper *cuh = s->ref->cuh;
> RefPicList *refPicList = s->ref->refPicList;
> HEVCFrame *ref0 = NULL, *ref1 = NULL;
> uint8_t *dst0 = POS(0, x0, y0);
> @@ -1843,6 +1848,9 @@ static void hls_prediction_unit(HEVCContext *s, int
> x0, int y0,
> for (i = 0; i < nPbW >> s->ps.sps->log2_min_pu_size; i++)
> tab_mvf[(y_pu + j) * min_pu_width + x_pu + i] = current_mv;
>
> + struct CodingUnitHelper cuh_ = {lc->cu, log2_cb_size };
> + cuh[s->ref->cu_count++] = cuh_;
> +
> if (current_mv.pred_flag & PF_L0) {
> ref0 = refPicList[0].ref[current_mv.ref_idx[0]];
> if (!ref0)
> @@ -3192,6 +3200,160 @@ static int hevc_decode_extradata(HEVCContext *s,
> uint8_t *buf, int length, int f
> return 0;
> }
>
> +static int set_mv(AVMotionVector *mv, int puW, int puH,
> + int dst_x, int dst_y,
> + int motion_x, int motion_y, int motion_scale,
> + int direction)
> +{
> + mv->w = puW;
> + mv->h = puH;
> + mv->motion_x = motion_x;
> + mv->motion_y = motion_y;
> + mv->motion_scale = motion_scale;
> + mv->dst_x = dst_x;
> + mv->dst_y = dst_y;
> + mv->src_x = dst_x + motion_x / motion_scale;
> + mv->src_y = dst_y + motion_y / motion_scale;
> + mv->source = direction ? 1 : -1;
> + mv->flags = 0;
> +
> + return 1;
> +}
> +
> +static int add_mv(HEVCContext *s, AVMotionVector *mvs, MvField
> current_mv, int x0, int y0, int width, int height)
> +{
> + int sx, sy, count = 0;
> + const int scale = 4;
> +
> + sx = x0 + (width / 2);
> + sy = y0 + (height / 2);
> +
> + if (current_mv.pred_flag & PF_L0) {
> + count += set_mv(mvs + count, width, height , sx, sy, current_mv.mv[0].x,
> current_mv.mv[0].y, scale, 0);
> + }
> +
> + if (current_mv.pred_flag & PF_L1) {
> + count += set_mv(mvs + count, width, height , sx, sy, current_mv.mv[1].x,
> current_mv.mv[1].y, scale, 1);
> + }
> +
> + return count;
> +}
> +
> +static int export_mvs(HEVCContext *s, AVFrame *out)
> +{
> + int x0, y0, i, log2_cb_size;
> + int mv_count = 0;
> + HEVCFrame* pFrame = NULL;
> + struct MvField current_mv = {{{ 0 }}};
> +
> + /* Find the next output picture\frame tp export it VMs */
> + for (i = 0; i < FF_ARRAY_ELEMS(s->DPB) && pFrame == NULL; i++) {
> + HEVCFrame *frame = &s->DPB[i];
> + if (frame->flags & (HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_MV)
> &&
> + frame->poc == s->output_frame_poc) {
> + pFrame = frame;
> + }
> + }
> +
> + if(pFrame == NULL) {
> + av_log(s->avctx, AV_LOG_WARNING,
> + "Not exporting MVs for frame POC %d", s->poc);
> + return -1;
> + }
> +
> + MvField *tab_mvf = pFrame->tab_mvf;
> +
> + const int min_pu_width = s->ps.sps->min_pu_width;
> + const unsigned log2_min_pu_size = s->ps.sps->log2_min_pu_size;
> +
> + /* size is number of [coding units * 2 * 4] where 2 is for directions
> and 4 is
> + * for the maximum number of part mode */
> + AVMotionVector *mvs = av_malloc_array(pFrame->cu_count, 2 * 4 *
> sizeof(AVMotionVector));
> + if (!mvs) {
> + av_log(s->avctx, AV_LOG_WARNING,
> + "Failed to allocate Motion Vector array for frame POC %d",
> s->poc);
> + ff_hevc_unref_frame(s, pFrame, HEVC_FRAME_FLAG_MV);
> + return -1;
> + }
> +
> + for (i = 0; i < pFrame->cu_count; ++i) {
> +
> + const CodingUnitHelper current_cu = pFrame->cuh[i];
> + /* Export only INTER prediction coding units */
> + if(current_cu.cu.pred_mode != MODE_INTER)
> + continue;
> +
> + y0 = current_cu.cu.y;
> + x0 = current_cu.cu.x;
> + log2_cb_size = current_cu.log2_cu_size;
> + enum PartMode part_mode = current_cu.cu.part_mode;
> +
> + int cb_size = 1<<log2_cb_size;
> +
> + current_mv = tab_mvf[(y0 >> log2_min_pu_size) * min_pu_width +
> + (x0 >> log2_min_pu_size)];
> +
> + const int half_cb_size = 1<<(log2_cb_size-1);
> + switch (part_mode) {
> + case PART_2Nx2N:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size, cb_size);
> + break;
> + case PART_NxN:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size/2, cb_size/2);
> + mv_count += add_mv(s, mvs + mv_count, current_mv,
> x0+half_cb_size, y0, cb_size/2, cb_size/2);
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0,
> y0+half_cb_size, cb_size/2, cb_size/2);
> + mv_count += add_mv(s, mvs + mv_count, current_mv,
> x0+half_cb_size, y0+half_cb_size, cb_size/2, cb_size/2);
> + break;
> + case PART_2NxN:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size, cb_size/2);
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0,
> y0+half_cb_size, cb_size, cb_size/2);
> + break;
> + case PART_Nx2N:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size/2, cb_size);
> + mv_count += add_mv(s, mvs + mv_count, current_mv,
> x0+half_cb_size, y0, cb_size/2, cb_size);
> + break;
> + case PART_2NxnU:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size, cb_size/4);
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0,
> y0+cb_size/4, cb_size, cb_size*3/4);
> + break;
> + case PART_2NxnD:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size, cb_size*3/4);
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0,
> y0+cb_size*3/4, cb_size, cb_size/4);
> + break;
> + case PART_nLx2N:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size/4, cb_size);
> + mv_count += add_mv(s, mvs + mv_count, current_mv,
> x0+cb_size/4, y0, cb_size*3/4, cb_size);
> + break;
> + case PART_nRx2N:
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0, y0,
> cb_size*3/4, cb_size);
> + mv_count += add_mv(s, mvs + mv_count, current_mv, x0*3/4, y0,
> cb_size/4, cb_size);
> + break;
> + default:
> + break;
> + }
> + }
> +
> + if (mv_count) {
> + AVFrameSideData *sd;
> +
> + av_log(s->avctx, AV_LOG_DEBUG, "Adding %d MVs info to frame with
> POC %d", mv_count, s->poc);
> + sd = av_frame_new_side_data(out, AV_FRAME_DATA_MOTION_VECTORS,
> mv_count * sizeof(AVMotionVector));
> + if (!sd) {
> + av_log(s->avctx, AV_LOG_WARNING, "Failed to create side data
> MVs info to frame POC %d", s->poc);
> + av_freep(&mvs);
> + ff_hevc_unref_frame(s, pFrame, HEVC_FRAME_FLAG_MV);
> + return -1;
> + }
> + memcpy(sd->data, mvs, mv_count * sizeof(AVMotionVector));
> + }
> +
> + /* Cleanup and release */
> + av_freep(&mvs);
> + ff_hevc_unref_frame(s, pFrame, HEVC_FRAME_FLAG_MV);
> +
> + return 0;
> +}
> +
> static int hevc_decode_frame(AVCodecContext *avctx, void *data, int
> *got_output,
> AVPacket *avpkt)
> {
> @@ -3249,6 +3411,9 @@ static int hevc_decode_frame(AVCodecContext *avctx,
> void *data, int *got_output,
>
> if (s->output_frame->buf[0]) {
> av_frame_move_ref(data, s->output_frame);
> + if (s->avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
> + export_mvs(s, data);
> + }
> *got_output = 1;
> }
>
> @@ -3277,8 +3442,14 @@ static int hevc_ref_frame(HEVCContext *s, HEVCFrame
> *dst, HEVCFrame *src)
> if (!dst->rpl_buf)
> goto fail;
>
> + dst->cuh_buf = av_buffer_ref(src->cuh_buf);
> + if (!dst->cuh_buf)
> + goto fail;
> + dst->cuh = src->cuh;
> +
> dst->poc = src->poc;
> dst->ctb_count = src->ctb_count;
> + dst->cu_count = src->cu_count;
> dst->flags = src->flags;
> dst->sequence = src->sequence;
>
> diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
> index 89e0809850..187c6ec7a2 100644
> --- a/libavcodec/hevcdec.h
> +++ b/libavcodec/hevcdec.h
> @@ -252,6 +252,12 @@ typedef struct CodingUnit {
> uint8_t cu_transquant_bypass_flag;
> } CodingUnit;
>
> +typedef struct CodingUnitHelper {
> + CodingUnit cu;
> +
> + uint8_t log2_cu_size;
> +} CodingUnitHelper;
> +
> typedef struct Mv {
> int16_t x; ///< horizontal component of motion vector
> int16_t y; ///< vertical component of motion vector
> @@ -307,20 +313,24 @@ typedef struct DBParams {
> #define HEVC_FRAME_FLAG_SHORT_REF (1 << 1)
> #define HEVC_FRAME_FLAG_LONG_REF (1 << 2)
> #define HEVC_FRAME_FLAG_BUMPING (1 << 3)
> +#define HEVC_FRAME_FLAG_MV (1 << 4)
>
> typedef struct HEVCFrame {
> AVFrame *frame;
> ThreadFrame tf;
> MvField *tab_mvf;
> + CodingUnitHelper *cuh;
> RefPicList *refPicList;
> RefPicListTab **rpl_tab;
> int ctb_count;
> int poc;
> + int cu_count;
> struct HEVCFrame *collocated_ref;
>
> AVBufferRef *tab_mvf_buf;
> AVBufferRef *rpl_tab_buf;
> AVBufferRef *rpl_buf;
> + AVBufferRef *cuh_buf;
>
> AVBufferRef *hwaccel_priv_buf;
> void *hwaccel_picture_private;
> @@ -405,11 +415,14 @@ typedef struct HEVCContext {
> uint8_t *sao_pixel_buffer_h[3];
> uint8_t *sao_pixel_buffer_v[3];
>
> + int output_frame_poc;
> +
> HEVCParamSets ps;
> HEVCSEI sei;
> struct AVMD5 *md5_ctx;
>
> AVBufferPool *tab_mvf_pool;
> + AVBufferPool *cuh_pool;
> AVBufferPool *rpl_tab_pool;
>
> ///< candidate references for the current frame
> --
> 2.17.1
>
>
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