/* gstvp9parser.c * * Copyright (C) 2013-2014 Intel Corporation * Copyright (C) 2015 Intel Corporation * Author: XuGuangxin * Author: Sreerenj Balachandran * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:gstvp9parser * @short_description: Convenience library for parsing vp9 video bitstream. * * For more details about the structures, you can refer to the * specifications: */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "vp9utils.h" #include "gstvp9parser.h" #define MIN_TILE_WIDTH_B64 4 #define MAX_TILE_WIDTH_B64 64 /* order of sb64, where sb64 = 64x64 */ #define ALIGN_SB64(w) ((w + 63) >> 6) GST_DEBUG_CATEGORY (gst_vp9_parser_debug); #define GST_CAT_DEFAULT gst_vp9_parser_debug static gboolean initialized = FALSE; #define INITIALIZE_DEBUG_CATEGORY \ if (!initialized) { \ GST_DEBUG_CATEGORY_INIT (gst_vp9_parser_debug, "codecparsers_vp9", 0, \ "vp9 parser library"); \ initialized = TRUE; \ } #define gst_vp9_read_bit(br) gst_bit_reader_get_bits_uint8_unchecked(br, 1) #define gst_vp9_read_bits(br, bits) gst_bit_reader_get_bits_uint32_unchecked(br, bits) #define GST_VP9_PARSER_GET_PRIVATE(parser) ((GstVp9ParserPrivate *)(parser->priv)) typedef struct _ReferenceSize { guint32 width; guint32 height; } ReferenceSize; typedef struct { /* for loop filters */ gint8 ref_deltas[GST_VP9_MAX_REF_LF_DELTAS]; gint8 mode_deltas[GST_VP9_MAX_MODE_LF_DELTAS]; guint8 segmentation_abs_delta; GstVp9SegmentationInfoData segmentation[GST_VP9_MAX_SEGMENTS]; ReferenceSize reference[GST_VP9_REF_FRAMES]; } GstVp9ParserPrivate; static gint32 gst_vp9_read_signed_bits (GstBitReader * br, int bits) { const gint32 value = gst_vp9_read_bits (br, bits); return gst_vp9_read_bit (br) ? -value : value; } static gboolean verify_frame_marker (GstBitReader * br) { guint8 frame_marker = gst_vp9_read_bits (br, 2); if (frame_marker != GST_VP9_FRAME_MARKER) { GST_ERROR ("Invalid VP9 Frame Marker !"); return FALSE; } return TRUE; } static gboolean verify_sync_code (GstBitReader * const br) { return (gst_vp9_read_bits (br, 24) == GST_VP9_SYNC_CODE); } static gboolean parse_bitdepth_colorspace_sampling (GstBitReader * const br, GstVp9FrameHdr * frame_hdr) { if (frame_hdr->profile > GST_VP9_PROFILE_1) frame_hdr->bit_depth = gst_vp9_read_bit (br) ? GST_VP9_BIT_DEPTH_12 : GST_VP9_BIT_DEPTH_10; else frame_hdr->bit_depth = GST_VP9_BIT_DEPTH_8; frame_hdr->color_space = gst_vp9_read_bits (br, 3); if (frame_hdr->color_space != GST_VP9_CS_SRGB) { frame_hdr->color_range = gst_vp9_read_bit (br); if (frame_hdr->profile == GST_VP9_PROFILE_1 || frame_hdr->profile == GST_VP9_PROFILE_3) { frame_hdr->subsampling_x = gst_vp9_read_bit (br); frame_hdr->subsampling_y = gst_vp9_read_bit (br); if (frame_hdr->subsampling_x == 1 && frame_hdr->subsampling_y == 1) { GST_ERROR ("4:2:0 subsampling is not supported in profile_1 or profile_3"); goto error; } if (gst_vp9_read_bit (br)) { GST_ERROR ("Reserved bit set!"); goto error; } } else { frame_hdr->subsampling_y = frame_hdr->subsampling_x = 1; } } else { frame_hdr->color_range = GST_VP9_CR_FULL; if (frame_hdr->profile == GST_VP9_PROFILE_1 || frame_hdr->profile == GST_VP9_PROFILE_3) { if (gst_vp9_read_bit (br)) { GST_ERROR ("Reserved bit set!"); goto error; } } else { GST_ERROR ("4:4:4 subsampling is not supported in profile_0 and profile_2"); goto error; } } return TRUE; error: return FALSE; } static guint parse_profile (GstBitReader * br) { guint8 profile = gst_vp9_read_bit (br); profile |= gst_vp9_read_bit (br) << 1; if (profile > 2) profile += gst_vp9_read_bit (br); return profile; } static void parse_frame_size (GstBitReader * br, guint32 * width, guint32 * height) { const guint32 w = gst_vp9_read_bits (br, 16) + 1; const guint32 h = gst_vp9_read_bits (br, 16) + 1; *width = w; *height = h; } static void parse_display_frame_size (GstBitReader * br, GstVp9FrameHdr * frame_hdr) { frame_hdr->display_size_enabled = gst_vp9_read_bit (br); if (frame_hdr->display_size_enabled) parse_frame_size (br, &frame_hdr->display_width, &frame_hdr->display_height); } static void parse_frame_size_from_refs (const GstVp9Parser * parser, GstVp9FrameHdr * frame_hdr, GstBitReader * br) { gboolean found = FALSE; int i; GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); for (i = 0; i < GST_VP9_REFS_PER_FRAME; i++) { found = gst_vp9_read_bit (br); if (found) { guint8 idx = frame_hdr->ref_frame_indices[i]; frame_hdr->width = priv->reference[idx].width; frame_hdr->height = priv->reference[idx].height; break; } } if (!found) parse_frame_size (br, &frame_hdr->width, &frame_hdr->height); } static GstVp9InterpolationFilter parse_interp_filter (GstBitReader * br) { static const GstVp9InterpolationFilter filter_map[] = { GST_VP9_INTERPOLATION_FILTER_EIGHTTAP_SMOOTH, GST_VP9_INTERPOLATION_FILTER_EIGHTTAP, GST_VP9_INTERPOLATION_FILTER_EIGHTTAP_SHARP, GST_VP9_INTERPOLATION_FILTER_BILINEAR }; return gst_vp9_read_bit (br) ? GST_VP9_INTERPOLATION_FILTER_SWITCHABLE : filter_map[gst_vp9_read_bits (br, 2)]; } static void parse_loopfilter (GstVp9LoopFilter * lf, GstBitReader * br) { lf->filter_level = gst_vp9_read_bits (br, 6); lf->sharpness_level = gst_vp9_read_bits (br, 3); lf->mode_ref_delta_update = 0; lf->mode_ref_delta_enabled = gst_vp9_read_bit (br); if (lf->mode_ref_delta_enabled) { lf->mode_ref_delta_update = gst_vp9_read_bit (br); if (lf->mode_ref_delta_update) { int i; for (i = 0; i < GST_VP9_MAX_REF_LF_DELTAS; i++) { lf->update_ref_deltas[i] = gst_vp9_read_bit (br); if (lf->update_ref_deltas[i]) lf->ref_deltas[i] = gst_vp9_read_signed_bits (br, 6); } for (i = 0; i < GST_VP9_MAX_MODE_LF_DELTAS; i++) { lf->update_mode_deltas[i] = gst_vp9_read_bit (br); if (lf->update_mode_deltas[i]) lf->mode_deltas[i] = gst_vp9_read_signed_bits (br, 6); } } } } static gint8 parse_delta_q (GstBitReader * br) { return gst_vp9_read_bit (br) ? gst_vp9_read_signed_bits (br, 4) : 0; } static void parse_quantization (GstVp9QuantIndices * quant_indices, GstBitReader * br) { quant_indices->y_ac_qi = gst_vp9_read_bits (br, QINDEX_BITS); quant_indices->y_dc_delta = parse_delta_q (br); quant_indices->uv_dc_delta = parse_delta_q (br); quant_indices->uv_ac_delta = parse_delta_q (br); } static void parse_segmentation (GstVp9SegmentationInfo * seg, GstBitReader * br) { int i; seg->update_map = FALSE; seg->update_data = FALSE; seg->enabled = gst_vp9_read_bit (br); if (!seg->enabled) return; /* Segmentation map update */ seg->update_map = gst_vp9_read_bit (br); if (seg->update_map) { for (i = 0; i < GST_VP9_SEG_TREE_PROBS; i++) { seg->update_tree_probs[i] = gst_vp9_read_bit (br); seg->tree_probs[i] = seg->update_tree_probs[i] ? gst_vp9_read_bits (br, 8) : GST_VP9_MAX_PROB; } seg->temporal_update = gst_vp9_read_bit (br); if (seg->temporal_update) { for (i = 0; i < GST_VP9_PREDICTION_PROBS; i++) { seg->update_pred_probs[i] = gst_vp9_read_bit (br); seg->pred_probs[i] = seg->update_pred_probs[i] ? gst_vp9_read_bits (br, 8) : GST_VP9_MAX_PROB; } } else { for (i = 0; i < GST_VP9_PREDICTION_PROBS; i++) seg->pred_probs[i] = GST_VP9_MAX_PROB; } } /* Segmentation data update */ seg->update_data = gst_vp9_read_bit (br); if (seg->update_data) { /* clear all features */ memset (seg->data, 0, sizeof (seg->data)); seg->abs_delta = gst_vp9_read_bit (br); for (i = 0; i < GST_VP9_MAX_SEGMENTS; i++) { GstVp9SegmentationInfoData *seg_data = seg->data + i; guint8 data; /* SEG_LVL_ALT_Q */ seg_data->alternate_quantizer_enabled = gst_vp9_read_bit (br); if (seg_data->alternate_quantizer_enabled) { data = gst_vp9_read_bits (br, 8); seg_data->alternate_quantizer = gst_vp9_read_bit (br) ? -data : data; } /* SEG_LVL_ALT_LF */ seg_data->alternate_loop_filter_enabled = gst_vp9_read_bit (br); if (seg_data->alternate_loop_filter_enabled) { data = gst_vp9_read_bits (br, 6); seg_data->alternate_loop_filter = gst_vp9_read_bit (br) ? -data : data; } /* SEG_LVL_REF_FRAME */ seg_data->reference_frame_enabled = gst_vp9_read_bit (br); if (seg_data->reference_frame_enabled) { seg_data->reference_frame = gst_vp9_read_bits (br, 2); } seg_data->reference_skip = gst_vp9_read_bit (br); } } } static guint32 get_max_lb_tile_cols (guint32 sb_cols) { gint max_log2 = 1; while ((sb_cols >> max_log2) >= MIN_TILE_WIDTH_B64) ++max_log2; return max_log2 - 1; } static guint32 get_min_lb_tile_cols (guint32 sb_cols) { gint min_log2 = 0; while ((MAX_TILE_WIDTH_B64 << min_log2) < sb_cols) ++min_log2; return min_log2; } static gboolean parse_tile_info (GstVp9FrameHdr * frame_hdr, GstBitReader * br) { guint32 max_ones; const guint32 sb_cols = ALIGN_SB64 (frame_hdr->width); guint32 min_lb_tile_cols = get_min_lb_tile_cols (sb_cols); guint32 max_lb_tile_cols = get_max_lb_tile_cols (sb_cols); g_assert (min_lb_tile_cols <= max_lb_tile_cols); max_ones = max_lb_tile_cols - min_lb_tile_cols; /* columns */ frame_hdr->log2_tile_columns = min_lb_tile_cols; while (max_ones-- && gst_vp9_read_bit (br)) frame_hdr->log2_tile_columns++; if (frame_hdr->log2_tile_columns > 6) { GST_ERROR ("Invalid number of tile columns..!"); return FALSE; } /* row */ frame_hdr->log2_tile_rows = gst_vp9_read_bit (br); if (frame_hdr->log2_tile_rows) frame_hdr->log2_tile_rows += gst_vp9_read_bit (br); return TRUE; } static void loop_filter_update (GstVp9Parser * parser, const GstVp9LoopFilter * lf) { GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); int i; for (i = 0; i < GST_VP9_MAX_REF_LF_DELTAS; i++) { if (lf->update_ref_deltas[i]) priv->ref_deltas[i] = lf->ref_deltas[i]; } for (i = 0; i < GST_VP9_MAX_MODE_LF_DELTAS; i++) { if (lf->update_mode_deltas[i]) priv->mode_deltas[i] = lf->mode_deltas[i]; } } static guint8 seg_get_base_qindex (const GstVp9Parser * parser, const GstVp9FrameHdr * frame_hdr, int segid) { int seg_base = frame_hdr->quant_indices.y_ac_qi; GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); const GstVp9SegmentationInfoData *seg = priv->segmentation + segid; /* DEBUG("id = %d, seg_base = %d, seg enable = %d, alt eanble = %d, abs = %d, alt= %d\n",segid, seg_base, frame_hdr->segmentation.enabled, seg->alternate_quantizer_enabled, priv->segmentation_abs_delta, seg->alternate_quantizer); */ if (frame_hdr->segmentation.enabled && seg->alternate_quantizer_enabled) { if (priv->segmentation_abs_delta) seg_base = seg->alternate_quantizer; else seg_base += seg->alternate_quantizer; } return CLAMP (seg_base, 0, MAXQ); } static guint8 seg_get_filter_level (const GstVp9Parser * parser, const GstVp9FrameHdr * frame_hdr, int segid) { int seg_filter = frame_hdr->loopfilter.filter_level; GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); const GstVp9SegmentationInfoData *seg = priv->segmentation + segid; if (frame_hdr->segmentation.enabled && seg->alternate_loop_filter_enabled) { if (priv->segmentation_abs_delta) seg_filter = seg->alternate_loop_filter; else seg_filter += seg->alternate_loop_filter; } return CLAMP (seg_filter, 0, GST_VP9_MAX_LOOP_FILTER); } /*save segmentation info from frame header to parser*/ static void segmentation_save (GstVp9Parser * parser, const GstVp9FrameHdr * frame_hdr) { const GstVp9SegmentationInfo *info = &frame_hdr->segmentation; if (!info->enabled) return; if (info->update_map) { g_assert (G_N_ELEMENTS (parser->mb_segment_tree_probs) == G_N_ELEMENTS (info->tree_probs)); g_assert (G_N_ELEMENTS (parser->segment_pred_probs) == G_N_ELEMENTS (info->pred_probs)); memcpy (parser->mb_segment_tree_probs, info->tree_probs, sizeof (info->tree_probs)); memcpy (parser->segment_pred_probs, info->pred_probs, sizeof (info->pred_probs)); } if (info->update_data) { GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); priv->segmentation_abs_delta = info->abs_delta; g_assert (G_N_ELEMENTS (priv->segmentation) == G_N_ELEMENTS (info->data)); memcpy (priv->segmentation, info->data, sizeof (info->data)); } } static void segmentation_update (GstVp9Parser * parser, const GstVp9FrameHdr * frame_hdr) { int i = 0; const GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); const GstVp9LoopFilter *lf = &frame_hdr->loopfilter; const GstVp9QuantIndices *quant_indices = &frame_hdr->quant_indices; int default_filter = lf->filter_level; const int scale = 1 << (default_filter >> 5); segmentation_save (parser, frame_hdr); for (i = 0; i < GST_VP9_MAX_SEGMENTS; i++) { guint8 q = seg_get_base_qindex (parser, frame_hdr, i); GstVp9Segmentation *seg = parser->segmentation + i; const GstVp9SegmentationInfoData *info = priv->segmentation + i; seg->luma_dc_quant_scale = gst_vp9_dc_quant (q, quant_indices->y_dc_delta, frame_hdr->bit_depth); seg->luma_ac_quant_scale = gst_vp9_ac_quant (q, 0, frame_hdr->bit_depth); seg->chroma_dc_quant_scale = gst_vp9_dc_quant (q, quant_indices->uv_dc_delta, frame_hdr->bit_depth); seg->chroma_ac_quant_scale = gst_vp9_ac_quant (q, quant_indices->uv_ac_delta, frame_hdr->bit_depth); if (lf->filter_level) { guint8 filter = seg_get_filter_level (parser, frame_hdr, i); if (!lf->mode_ref_delta_enabled) { memset (seg->filter_level, filter, sizeof (seg->filter_level)); } else { int ref, mode; const int intra_filter = filter + priv->ref_deltas[GST_VP9_REF_FRAME_INTRA] * scale; seg->filter_level[GST_VP9_REF_FRAME_INTRA][0] = CLAMP (intra_filter, 0, GST_VP9_MAX_LOOP_FILTER); for (ref = GST_VP9_REF_FRAME_LAST; ref < GST_VP9_REF_FRAME_MAX; ++ref) { for (mode = 0; mode < GST_VP9_MAX_MODE_LF_DELTAS; ++mode) { const int inter_filter = filter + priv->ref_deltas[ref] * scale + priv->mode_deltas[mode] * scale; seg->filter_level[ref][mode] = CLAMP (inter_filter, 0, GST_VP9_MAX_LOOP_FILTER); } } } } seg->reference_frame_enabled = info->reference_frame_enabled;; seg->reference_frame = info->reference_frame; seg->reference_skip = info->reference_skip; } } static void reference_update (GstVp9Parser * parser, const GstVp9FrameHdr * const frame_hdr) { guint8 flag = 1; guint8 refresh_frame_flags; int i; GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); ReferenceSize *reference = priv->reference; if (frame_hdr->frame_type == GST_VP9_KEY_FRAME) { refresh_frame_flags = 0xff; } else { refresh_frame_flags = frame_hdr->refresh_frame_flags; } for (i = 0; i < GST_VP9_REF_FRAMES; i++) { if (refresh_frame_flags & flag) { reference[i].width = frame_hdr->width; reference[i].height = frame_hdr->height; } flag <<= 1; } } static inline int frame_is_intra_only (const GstVp9FrameHdr * frame_hdr) { return frame_hdr->frame_type == GST_VP9_KEY_FRAME || frame_hdr->intra_only; } static void set_default_lf_deltas (GstVp9Parser * parser) { GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); priv->ref_deltas[GST_VP9_REF_FRAME_INTRA] = 1; priv->ref_deltas[GST_VP9_REF_FRAME_LAST] = 0; priv->ref_deltas[GST_VP9_REF_FRAME_GOLDEN] = -1; priv->ref_deltas[GST_VP9_REF_FRAME_ALTREF] = -1; priv->mode_deltas[0] = 0; priv->mode_deltas[1] = 0; } static void set_default_segmentation_info (GstVp9Parser * parser) { GstVp9ParserPrivate *priv = GST_VP9_PARSER_GET_PRIVATE (parser); memset (priv->segmentation, 0, sizeof (priv->segmentation)); priv->segmentation_abs_delta = FALSE; } static void setup_past_independence (GstVp9Parser * parser, GstVp9FrameHdr * const frame_hdr) { set_default_lf_deltas (parser); set_default_segmentation_info (parser); memset (frame_hdr->ref_frame_sign_bias, 0, sizeof (frame_hdr->ref_frame_sign_bias)); } static void gst_vp9_parser_init (GstVp9Parser * parser) { GstVp9ParserPrivate *priv = parser->priv; memset (parser, 0, sizeof (GstVp9Parser)); memset (priv, 0, sizeof (GstVp9ParserPrivate)); parser->priv = priv; } static GstVp9ParserResult gst_vp9_parser_update (GstVp9Parser * parser, GstVp9FrameHdr * const frame_hdr) { if (frame_hdr->frame_type == GST_VP9_KEY_FRAME) gst_vp9_parser_init (parser); if (frame_is_intra_only (frame_hdr) || frame_hdr->error_resilient_mode) setup_past_independence (parser, frame_hdr); loop_filter_update (parser, &frame_hdr->loopfilter); segmentation_update (parser, frame_hdr); reference_update (parser, frame_hdr); return GST_VP9_PARSER_OK; } /******** API *************/ /** * gst_vp9_parser_new: * * Creates a new #GstVp9Parser. It should be freed with * gst_vp9_parser_free() after use. * * Returns: a new #GstVp9Parser * * Since: 1.8 */ GstVp9Parser * gst_vp9_parser_new (void) { GstVp9Parser *parser; GstVp9ParserPrivate *priv; INITIALIZE_DEBUG_CATEGORY; GST_DEBUG ("Create VP9 Parser"); parser = g_slice_new (GstVp9Parser); if (!parser) return NULL; priv = g_slice_new (GstVp9ParserPrivate); if (!priv) return NULL; parser->priv = priv; gst_vp9_parser_init (parser); return parser; } /** * gst_vp9_parser_free: * @parser: the #GstVp9Parser to free * * Frees @parser. * * Since: 1.8 */ void gst_vp9_parser_free (GstVp9Parser * parser) { if (parser) { if (parser->priv) { g_slice_free (GstVp9ParserPrivate, parser->priv); parser->priv = NULL; } g_slice_free (GstVp9Parser, parser); } } /** * gst_vp9_parser_parse_frame_header: * @parser: The #GstVp9Parser * @frame_hdr: The #GstVp9FrameHdr to fill * @data: The data to parse * @size: The size of the @data to parse * * Parses the VP9 bitstream contained in @data, and fills in @frame_hdr * with the information. The @size argument represent the whole frame size. * * Returns: a #GstVp9ParserResult * * Since: 1.8 */ GstVp9ParserResult gst_vp9_parser_parse_frame_header (GstVp9Parser * parser, GstVp9FrameHdr * frame_hdr, const guint8 * data, gsize size) { GstBitReader bit_reader; GstBitReader *br = &bit_reader; gst_bit_reader_init (br, data, size); memset (frame_hdr, 0, sizeof (*frame_hdr)); /* Parsing Uncompressed Data Chunk */ if (!verify_frame_marker (br)) goto error; frame_hdr->profile = parse_profile (br); if (frame_hdr->profile > GST_VP9_PROFILE_UNDEFINED) { GST_ERROR ("Stream has undefined VP9 profile !"); goto error; } frame_hdr->show_existing_frame = gst_vp9_read_bit (br); if (frame_hdr->show_existing_frame) { frame_hdr->frame_to_show = gst_vp9_read_bits (br, GST_VP9_REF_FRAMES_LOG2); return GST_VP9_PARSER_OK; } frame_hdr->frame_type = gst_vp9_read_bit (br); frame_hdr->show_frame = gst_vp9_read_bit (br); frame_hdr->error_resilient_mode = gst_vp9_read_bit (br); if (frame_hdr->frame_type == GST_VP9_KEY_FRAME) { if (!verify_sync_code (br)) { GST_ERROR ("Invalid VP9 Key-frame sync code !"); goto error; } if (!parse_bitdepth_colorspace_sampling (br, frame_hdr)) { GST_ERROR ("Failed to parse color_space/bit_depth info !"); goto error; } parse_frame_size (br, &frame_hdr->width, &frame_hdr->height); parse_display_frame_size (br, frame_hdr); } else { frame_hdr->intra_only = frame_hdr->show_frame ? 0 : gst_vp9_read_bit (br); frame_hdr->reset_frame_context = frame_hdr->error_resilient_mode ? 0 : gst_vp9_read_bits (br, 2); if (frame_hdr->intra_only) { if (!verify_sync_code (br)) { GST_ERROR ("Invalid VP9 sync code in intra-only frame !"); goto error; } if (frame_hdr->profile > GST_VP9_PROFILE_0) { if (!parse_bitdepth_colorspace_sampling (br, frame_hdr)) { GST_ERROR ("Failed to parse color_space/bit_depth info !"); goto error; } } else { frame_hdr->color_space = GST_VP9_CS_BT_601; frame_hdr->color_range = GST_VP9_CR_LIMITED; frame_hdr->subsampling_y = frame_hdr->subsampling_x = 1; frame_hdr->bit_depth = GST_VP9_BIT_DEPTH_8; } frame_hdr->refresh_frame_flags = gst_vp9_read_bits (br, GST_VP9_REF_FRAMES); parse_frame_size (br, &frame_hdr->width, &frame_hdr->height); parse_display_frame_size (br, frame_hdr); } else { int i; frame_hdr->refresh_frame_flags = gst_vp9_read_bits (br, GST_VP9_REF_FRAMES); for (i = 0; i < GST_VP9_REFS_PER_FRAME; i++) { frame_hdr->ref_frame_indices[i] = gst_vp9_read_bits (br, GST_VP9_REF_FRAMES_LOG2); frame_hdr->ref_frame_sign_bias[i] = gst_vp9_read_bit (br); } parse_frame_size_from_refs (parser, frame_hdr, br); parse_display_frame_size (br, frame_hdr); frame_hdr->allow_high_precision_mv = gst_vp9_read_bit (br); frame_hdr->mcomp_filter_type = parse_interp_filter (br); /* Assing defalut values */ frame_hdr->color_space = GST_VP9_CS_BT_601; frame_hdr->color_range = GST_VP9_CR_LIMITED; frame_hdr->subsampling_y = frame_hdr->subsampling_x = 1; frame_hdr->bit_depth = GST_VP9_BIT_DEPTH_8; } } frame_hdr->refresh_frame_context = frame_hdr->error_resilient_mode ? 0 : gst_vp9_read_bit (br); frame_hdr->frame_parallel_decoding_mode = frame_hdr->error_resilient_mode ? 1 : gst_vp9_read_bit (br); frame_hdr->frame_context_idx = gst_vp9_read_bits (br, GST_VP9_FRAME_CONTEXTS_LOG2); /* loopfilter header */ parse_loopfilter (&frame_hdr->loopfilter, br); /* quantization header */ parse_quantization (&frame_hdr->quant_indices, br); /* set lossless_flag */ frame_hdr->lossless_flag = frame_hdr->quant_indices.y_ac_qi == 0 && frame_hdr->quant_indices.y_dc_delta == 0 && frame_hdr->quant_indices.uv_dc_delta == 0 && frame_hdr->quant_indices.uv_ac_delta == 0; /* segmentation header */ parse_segmentation (&frame_hdr->segmentation, br); /* tile header */ if (!parse_tile_info (frame_hdr, br)) { GST_ERROR ("Failed to parse tile info...!"); goto error; } /* size of the rest of the header */ frame_hdr->first_partition_size = gst_vp9_read_bits (br, 16); if (!frame_hdr->first_partition_size) { GST_ERROR ("Failed to parse the first partition size...!"); goto error; } frame_hdr->frame_header_length_in_bytes = (gst_bit_reader_get_pos (br) + 7) / 8; return gst_vp9_parser_update (parser, frame_hdr); error: return GST_VP9_PARSER_ERROR; }