[deb_ffmpeg.git] / ffmpeg / libavcodec / hevc_sei.c

/*
 * HEVC Supplementary Enhancement Information messages
 *
 * Copyright (C) 2012 - 2013 Guillaume Martres
 * Copyright (C) 2012 - 2013 Gildas Cocherel
 * Copyright (C) 2013 Vittorio Giovara
 *
 * 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 "golomb.h"
#include "hevc.h"

static void decode_nal_sei_decoded_picture_hash(HEVCContext *s)
{
    int cIdx, i;
    uint8_t hash_type;
    //uint16_t picture_crc;
    //uint32_t picture_checksum;
    GetBitContext *gb = &s->HEVClc->gb;
    hash_type = get_bits(gb, 8);

    for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
        if (hash_type == 0) {
            s->is_md5 = 1;
            for (i = 0; i < 16; i++)
                s->md5[cIdx][i] = get_bits(gb, 8);
        } else if (hash_type == 1) {
            // picture_crc = get_bits(gb, 16);
            skip_bits(gb, 16);
        } else if (hash_type == 2) {
            // picture_checksum = get_bits_long(gb, 32);
            skip_bits(gb, 32);
        }
    }
}

static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
{
    GetBitContext *gb = &s->HEVClc->gb;

    get_ue_golomb(gb);                  // frame_packing_arrangement_id
    s->sei_frame_packing_present = !get_bits1(gb);

    if (s->sei_frame_packing_present) {
        s->frame_packing_arrangement_type = get_bits(gb, 7);
        s->quincunx_subsampling           = get_bits1(gb);
        s->content_interpretation_type    = get_bits(gb, 6);

        // the following skips spatial_flipping_flag frame0_flipped_flag
        // field_views_flag current_frame_is_frame0_flag
        // frame0_self_contained_flag frame1_self_contained_flag
        skip_bits(gb, 6);

        if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
            skip_bits(gb, 16);  // frame[01]_grid_position_[xy]
        skip_bits(gb, 8);       // frame_packing_arrangement_reserved_byte
        skip_bits1(gb);         // frame_packing_arrangement_persistance_flag
    }
    skip_bits1(gb);             // upsampled_aspect_ratio_flag
}

static void decode_nal_sei_display_orientation(HEVCContext *s)
{
    GetBitContext *gb = &s->HEVClc->gb;

    s->sei_display_orientation_present = !get_bits1(gb);

    if (s->sei_display_orientation_present) {
        s->sei_hflip = get_bits1(gb);     // hor_flip
        s->sei_vflip = get_bits1(gb);     // ver_flip

        s->sei_anticlockwise_rotation = get_bits(gb, 16);
        skip_bits1(gb);     // display_orientation_persistence_flag
    }
}

static int decode_pic_timing(HEVCContext *s)
{
    GetBitContext *gb = &s->HEVClc->gb;
    HEVCSPS *sps;

    if (!s->sps_list[s->active_seq_parameter_set_id])
        return(AVERROR(ENOMEM));
    sps = (HEVCSPS*)s->sps_list[s->active_seq_parameter_set_id]->data;

    if (sps->vui.frame_field_info_present_flag) {
        int pic_struct = get_bits(gb, 4);
        s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
        if (pic_struct == 2) {
            av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n");
            s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
        } else if (pic_struct == 1) {
            av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n");
            s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
        }
        get_bits(gb, 2);                   // source_scan_type
        get_bits(gb, 1);                   // duplicate_flag
    }
    return 1;
}

static int active_parameter_sets(HEVCContext *s)
{
    GetBitContext *gb = &s->HEVClc->gb;
    int num_sps_ids_minus1;
    int i;
    unsigned active_seq_parameter_set_id;

    get_bits(gb, 4); // active_video_parameter_set_id
    get_bits(gb, 1); // self_contained_cvs_flag
    get_bits(gb, 1); // num_sps_ids_minus1
    num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1

    active_seq_parameter_set_id = get_ue_golomb_long(gb);
    if (active_seq_parameter_set_id >= MAX_SPS_COUNT) {
        av_log(s->avctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
        return AVERROR_INVALIDDATA;
    }
    s->active_seq_parameter_set_id = active_seq_parameter_set_id;

    for (i = 1; i <= num_sps_ids_minus1; i++)
        get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]

    return 0;
}

static int decode_nal_sei_message(HEVCContext *s)
{
    GetBitContext *gb = &s->HEVClc->gb;

    int payload_type = 0;
    int payload_size = 0;
    int byte = 0xFF;
    av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");

    while (byte == 0xFF) {
        byte          = get_bits(gb, 8);
        payload_type += byte;
    }
    byte = 0xFF;
    while (byte == 0xFF) {
        byte          = get_bits(gb, 8);
        payload_size += byte;
    }
    if (s->nal_unit_type == NAL_SEI_PREFIX) {
        if (payload_type == 256 /*&& s->decode_checksum_sei*/) {
            decode_nal_sei_decoded_picture_hash(s);
        } else if (payload_type == 45) {
            decode_nal_sei_frame_packing_arrangement(s);
        } else if (payload_type == 47) {
            decode_nal_sei_display_orientation(s);
        } else if (payload_type == 1){
            int ret = decode_pic_timing(s);
            av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
            skip_bits(gb, 8 * payload_size);
            return ret;
        } else if (payload_type == 129){
            active_parameter_sets(s);
            av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
        } else {
            av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
            skip_bits(gb, 8*payload_size);
        }
    } else { /* nal_unit_type == NAL_SEI_SUFFIX */
        if (payload_type == 132 /* && s->decode_checksum_sei */)
            decode_nal_sei_decoded_picture_hash(s);
        else {
            av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", payload_type);
            skip_bits(gb, 8 * payload_size);
        }
    }
    return 1;
}

static int more_rbsp_data(GetBitContext *gb)
{
    return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
}

int ff_hevc_decode_nal_sei(HEVCContext *s)
{
    int ret;

    do {
        ret = decode_nal_sei_message(s);
        if (ret < 0)
            return(AVERROR(ENOMEM));
    } while (more_rbsp_data(&s->HEVClc->gb));
    return 1;
}
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* HEVC Supplementary Enhancement Information messages
	3	*
	4	* Copyright (C) 2012 - 2013 Guillaume Martres
	5	* Copyright (C) 2012 - 2013 Gildas Cocherel
	6	* Copyright (C) 2013 Vittorio Giovara
	7	*
	8	* This file is part of FFmpeg.
	9	*
	10	* FFmpeg is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU Lesser General Public
	12	* License as published by the Free Software Foundation; either
	13	* version 2.1 of the License, or (at your option) any later version.
	14	*
	15	* FFmpeg is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* Lesser General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU Lesser General Public
	21	* License along with FFmpeg; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	23	*/
	24
	25	#include "golomb.h"
	26	#include "hevc.h"
	27
	28	static void decode_nal_sei_decoded_picture_hash(HEVCContext *s)
	29	{
	30	int cIdx, i;
	31	uint8_t hash_type;
	32	//uint16_t picture_crc;
	33	//uint32_t picture_checksum;
	34	GetBitContext *gb = &s->HEVClc->gb;
	35	hash_type = get_bits(gb, 8);
	36
	37	for (cIdx = 0; cIdx < 3/((s->sps->chroma_format_idc == 0) ? 1 : 3)/; cIdx++) {
	38	if (hash_type == 0) {
	39	s->is_md5 = 1;
	40	for (i = 0; i < 16; i++)
	41	s->md5[cIdx][i] = get_bits(gb, 8);
	42	} else if (hash_type == 1) {
	43	// picture_crc = get_bits(gb, 16);
	44	skip_bits(gb, 16);
	45	} else if (hash_type == 2) {
	46	// picture_checksum = get_bits_long(gb, 32);
	47	skip_bits(gb, 32);
	48	}
	49	}
	50	}
	51
	52	static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
	53	{
	54	GetBitContext *gb = &s->HEVClc->gb;
	55
	56	get_ue_golomb(gb); // frame_packing_arrangement_id
	57	s->sei_frame_packing_present = !get_bits1(gb);
	58
	59	if (s->sei_frame_packing_present) {
	60	s->frame_packing_arrangement_type = get_bits(gb, 7);
	61	s->quincunx_subsampling = get_bits1(gb);
	62	s->content_interpretation_type = get_bits(gb, 6);
	63
	64	// the following skips spatial_flipping_flag frame0_flipped_flag
65	// field_views_flag current_frame_is_frame0_flag
66	// frame0_self_contained_flag frame1_self_contained_flag
67	skip_bits(gb, 6);
68
69	if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
70	skip_bits(gb, 16); // frame[01]_grid_position_[xy]
71	skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
72	skip_bits1(gb); // frame_packing_arrangement_persistance_flag
73	}
74	skip_bits1(gb); // upsampled_aspect_ratio_flag
75	}
76
77	static void decode_nal_sei_display_orientation(HEVCContext *s)
78	{
79	GetBitContext *gb = &s->HEVClc->gb;
80
81	s->sei_display_orientation_present = !get_bits1(gb);
82
83	if (s->sei_display_orientation_present) {
84	s->sei_hflip = get_bits1(gb); // hor_flip
85	s->sei_vflip = get_bits1(gb); // ver_flip
86
87	s->sei_anticlockwise_rotation = get_bits(gb, 16);
88	skip_bits1(gb); // display_orientation_persistence_flag
89	}
90	}
91
92	static int decode_pic_timing(HEVCContext *s)
93	{
94	GetBitContext *gb = &s->HEVClc->gb;
95	HEVCSPS *sps;
96
97	if (!s->sps_list[s->active_seq_parameter_set_id])
98	return(AVERROR(ENOMEM));
99	sps = (HEVCSPS*)s->sps_list[s->active_seq_parameter_set_id]->data;
100
101	if (sps->vui.frame_field_info_present_flag) {
102	int pic_struct = get_bits(gb, 4);
103	s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
104	if (pic_struct == 2) {
105	av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n");
106	s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
107	} else if (pic_struct == 1) {
108	av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n");
109	s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
110	}
111	get_bits(gb, 2); // source_scan_type
112	get_bits(gb, 1); // duplicate_flag
113	}
114	return 1;
115	}
116
117	static int active_parameter_sets(HEVCContext *s)
118	{
119	GetBitContext *gb = &s->HEVClc->gb;
120	int num_sps_ids_minus1;
121	int i;
122	unsigned active_seq_parameter_set_id;
123
124	get_bits(gb, 4); // active_video_parameter_set_id
125	get_bits(gb, 1); // self_contained_cvs_flag
126	get_bits(gb, 1); // num_sps_ids_minus1
127	num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
128
129	active_seq_parameter_set_id = get_ue_golomb_long(gb);
130	if (active_seq_parameter_set_id >= MAX_SPS_COUNT) {
131	av_log(s->avctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
132	return AVERROR_INVALIDDATA;
133	}
134	s->active_seq_parameter_set_id = active_seq_parameter_set_id;
135
136	for (i = 1; i <= num_sps_ids_minus1; i++)
137	get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
138
139	return 0;
140	}
141
142	static int decode_nal_sei_message(HEVCContext *s)
143	{
144	GetBitContext *gb = &s->HEVClc->gb;
145
146	int payload_type = 0;
147	int payload_size = 0;
148	int byte = 0xFF;
149	av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");
150
151	while (byte == 0xFF) {
152	byte = get_bits(gb, 8);
153	payload_type += byte;
154	}
155	byte = 0xFF;
156	while (byte == 0xFF) {
157	byte = get_bits(gb, 8);
158	payload_size += byte;
159	}
160	if (s->nal_unit_type == NAL_SEI_PREFIX) {
161	if (payload_type == 256 /&& s->decode_checksum_sei/) {
162	decode_nal_sei_decoded_picture_hash(s);
163	} else if (payload_type == 45) {
164	decode_nal_sei_frame_packing_arrangement(s);
165	} else if (payload_type == 47) {
166	decode_nal_sei_display_orientation(s);
167	} else if (payload_type == 1){
168	int ret = decode_pic_timing(s);
169	av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
170	skip_bits(gb, 8 * payload_size);
171	return ret;
172	} else if (payload_type == 129){
173	active_parameter_sets(s);
174	av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
175	} else {
176	av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
177	skip_bits(gb, 8*payload_size);
178	}
179	} else { /* nal_unit_type == NAL_SEI_SUFFIX */
180	if (payload_type == 132 /* && s->decode_checksum_sei */)
181	decode_nal_sei_decoded_picture_hash(s);
182	else {
183	av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", payload_type);
184	skip_bits(gb, 8 * payload_size);
185	}
186	}
187	return 1;
188	}
189
190	static int more_rbsp_data(GetBitContext *gb)
191	{
192	return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
193	}
194
195	int ff_hevc_decode_nal_sei(HEVCContext *s)
196	{
197	int ret;
198
199	do {
200	ret = decode_nal_sei_message(s);
201	if (ret < 0)
202	return(AVERROR(ENOMEM));
203	} while (more_rbsp_data(&s->HEVClc->gb));
204	return 1;
205	}