/*
- * H.26L/H.264/AVC/JVT/14496-10/... sei decoding
+ * H.26L/H.264/AVC/JVT/14496-10/... SEI decoding
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
/**
* @file
- * H.264 / AVC / MPEG4 part10 sei decoding.
+ * H.264 / AVC / MPEG-4 part10 SEI decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "avcodec.h"
+#include "get_bits.h"
#include "golomb.h"
-#include "h264.h"
+#include "h264_ps.h"
+#include "h264_sei.h"
#include "internal.h"
static const uint8_t sei_num_clock_ts_table[9] = {
1, 1, 1, 2, 2, 3, 3, 2, 3
};
-void ff_h264_reset_sei(H264Context *h)
+void ff_h264_sei_uninit(H264SEIContext *h)
{
- h->sei_recovery_frame_cnt = -1;
- h->sei_dpb_output_delay = 0;
- h->sei_cpb_removal_delay = -1;
- h->sei_buffering_period_present = 0;
- h->sei_frame_packing_present = 0;
- h->sei_display_orientation_present = 0;
- h->sei_reguserdata_afd_present = 0;
-
- h->a53_caption_size = 0;
- av_freep(&h->a53_caption);
+ h->unregistered.x264_build = -1;
+ h->recovery_point.recovery_frame_cnt = -1;
+
+ h->picture_timing.dpb_output_delay = 0;
+ h->picture_timing.cpb_removal_delay = -1;
+
+ h->buffering_period.present = 0;
+ h->frame_packing.present = 0;
+ h->display_orientation.present = 0;
+ h->afd.present = 0;
+
+ h->a53_caption.a53_caption_size = 0;
+ av_freep(&h->a53_caption.a53_caption);
}
-static int decode_picture_timing(H264Context *h)
+static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb,
+ const SPS *sps, void *logctx)
{
- if (h->sps.nal_hrd_parameters_present_flag ||
- h->sps.vcl_hrd_parameters_present_flag) {
- h->sei_cpb_removal_delay = get_bits(&h->gb,
- h->sps.cpb_removal_delay_length);
- h->sei_dpb_output_delay = get_bits(&h->gb,
- h->sps.dpb_output_delay_length);
+ if (!sps)
+ return AVERROR_INVALIDDATA;
+
+ if (sps->nal_hrd_parameters_present_flag ||
+ sps->vcl_hrd_parameters_present_flag) {
+ h->cpb_removal_delay = get_bits(gb, sps->cpb_removal_delay_length);
+ h->dpb_output_delay = get_bits(gb, sps->dpb_output_delay_length);
}
- if (h->sps.pic_struct_present_flag) {
+ if (sps->pic_struct_present_flag) {
unsigned int i, num_clock_ts;
- h->sei_pic_struct = get_bits(&h->gb, 4);
- h->sei_ct_type = 0;
+ h->pic_struct = get_bits(gb, 4);
+ h->ct_type = 0;
- if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
+ if (h->pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
return AVERROR_INVALIDDATA;
- num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct];
+ num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
for (i = 0; i < num_clock_ts; i++) {
- if (get_bits(&h->gb, 1)) { /* clock_timestamp_flag */
+ if (get_bits(gb, 1)) { /* clock_timestamp_flag */
unsigned int full_timestamp_flag;
- h->sei_ct_type |= 1 << get_bits(&h->gb, 2);
- skip_bits(&h->gb, 1); /* nuit_field_based_flag */
- skip_bits(&h->gb, 5); /* counting_type */
- full_timestamp_flag = get_bits(&h->gb, 1);
- skip_bits(&h->gb, 1); /* discontinuity_flag */
- skip_bits(&h->gb, 1); /* cnt_dropped_flag */
- skip_bits(&h->gb, 8); /* n_frames */
+ h->ct_type |= 1 << get_bits(gb, 2);
+ skip_bits(gb, 1); /* nuit_field_based_flag */
+ skip_bits(gb, 5); /* counting_type */
+ full_timestamp_flag = get_bits(gb, 1);
+ skip_bits(gb, 1); /* discontinuity_flag */
+ skip_bits(gb, 1); /* cnt_dropped_flag */
+ skip_bits(gb, 8); /* n_frames */
if (full_timestamp_flag) {
- skip_bits(&h->gb, 6); /* seconds_value 0..59 */
- skip_bits(&h->gb, 6); /* minutes_value 0..59 */
- skip_bits(&h->gb, 5); /* hours_value 0..23 */
+ skip_bits(gb, 6); /* seconds_value 0..59 */
+ skip_bits(gb, 6); /* minutes_value 0..59 */
+ skip_bits(gb, 5); /* hours_value 0..23 */
} else {
- if (get_bits(&h->gb, 1)) { /* seconds_flag */
- skip_bits(&h->gb, 6); /* seconds_value range 0..59 */
- if (get_bits(&h->gb, 1)) { /* minutes_flag */
- skip_bits(&h->gb, 6); /* minutes_value 0..59 */
- if (get_bits(&h->gb, 1)) /* hours_flag */
- skip_bits(&h->gb, 5); /* hours_value 0..23 */
+ if (get_bits(gb, 1)) { /* seconds_flag */
+ skip_bits(gb, 6); /* seconds_value range 0..59 */
+ if (get_bits(gb, 1)) { /* minutes_flag */
+ skip_bits(gb, 6); /* minutes_value 0..59 */
+ if (get_bits(gb, 1)) /* hours_flag */
+ skip_bits(gb, 5); /* hours_value 0..23 */
}
}
}
- if (h->sps.time_offset_length > 0)
- skip_bits(&h->gb,
- h->sps.time_offset_length); /* time_offset */
+ if (sps->time_offset_length > 0)
+ skip_bits(gb,
+ sps->time_offset_length); /* time_offset */
}
}
- if (h->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(h->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
- h->sei_ct_type, h->sei_pic_struct);
+ av_log(logctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
+ h->ct_type, h->pic_struct);
}
return 0;
}
-static int decode_registered_user_data_afd(H264Context *h, int size)
+static int decode_registered_user_data_afd(H264SEIAFD *h, GetBitContext *gb, int size)
{
int flag;
if (size-- < 1)
return AVERROR_INVALIDDATA;
- skip_bits(&h->gb, 1); // 0
- flag = get_bits(&h->gb, 1); // active_format_flag
- skip_bits(&h->gb, 6); // reserved
+ skip_bits(gb, 1); // 0
+ flag = get_bits(gb, 1); // active_format_flag
+ skip_bits(gb, 6); // reserved
if (flag) {
if (size-- < 1)
return AVERROR_INVALIDDATA;
- skip_bits(&h->gb, 4); // reserved
- h->active_format_description = get_bits(&h->gb, 4);
- h->sei_reguserdata_afd_present = 1;
+ skip_bits(gb, 4); // reserved
+ h->active_format_description = get_bits(gb, 4);
+ h->present = 1;
}
return 0;
}
-static int decode_registered_user_data_closed_caption(H264Context *h, int size)
+static int decode_registered_user_data_closed_caption(H264SEIA53Caption *h,
+ GetBitContext *gb, void *logctx,
+ int size)
{
int flag;
int user_data_type_code;
if (size < 3)
return AVERROR(EINVAL);
- user_data_type_code = get_bits(&h->gb, 8);
+ user_data_type_code = get_bits(gb, 8);
if (user_data_type_code == 0x3) {
- skip_bits(&h->gb, 1); // reserved
+ skip_bits(gb, 1); // reserved
- flag = get_bits(&h->gb, 1); // process_cc_data_flag
+ flag = get_bits(gb, 1); // process_cc_data_flag
if (flag) {
- skip_bits(&h->gb, 1); // zero bit
- cc_count = get_bits(&h->gb, 5);
- skip_bits(&h->gb, 8); // reserved
+ skip_bits(gb, 1); // zero bit
+ cc_count = get_bits(gb, 5);
+ skip_bits(gb, 8); // reserved
size -= 2;
if (cc_count && size >= cc_count * 3) {
return ret;
for (i = 0; i < cc_count; i++) {
- h->a53_caption[h->a53_caption_size++] = get_bits(&h->gb, 8);
- h->a53_caption[h->a53_caption_size++] = get_bits(&h->gb, 8);
- h->a53_caption[h->a53_caption_size++] = get_bits(&h->gb, 8);
+ h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8);
+ h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8);
+ h->a53_caption[h->a53_caption_size++] = get_bits(gb, 8);
}
- skip_bits(&h->gb, 8); // marker_bits
+ skip_bits(gb, 8); // marker_bits
}
}
} else {
int i;
- avpriv_request_sample("Subtitles with data type 0x%02x",
+ avpriv_request_sample(logctx, "Subtitles with data type 0x%02x",
user_data_type_code);
for (i = 0; i < size - 1; i++)
- skip_bits(&h->gb, 8);
+ skip_bits(gb, 8);
}
return 0;
}
-static int decode_registered_user_data(H264Context *h, int size)
+static int decode_registered_user_data(H264SEIContext *h, GetBitContext *gb,
+ void *logctx, int size)
{
uint32_t country_code;
uint32_t user_identifier;
return AVERROR_INVALIDDATA;
size -= 7;
- country_code = get_bits(&h->gb, 8); // itu_t_t35_country_code
+ country_code = get_bits(gb, 8); // itu_t_t35_country_code
if (country_code == 0xFF) {
- skip_bits(&h->gb, 8); // itu_t_t35_country_code_extension_byte
+ skip_bits(gb, 8); // itu_t_t35_country_code_extension_byte
size--;
}
/* itu_t_t35_payload_byte follows */
- skip_bits(&h->gb, 8); // terminal provider code
- skip_bits(&h->gb, 8); // terminal provider oriented code
- user_identifier = get_bits_long(&h->gb, 32);
+ skip_bits(gb, 8); // terminal provider code
+ skip_bits(gb, 8); // terminal provider oriented code
+ user_identifier = get_bits_long(gb, 32);
switch (user_identifier) {
case MKBETAG('D', 'T', 'G', '1'): // afd_data
- return decode_registered_user_data_afd(h, size);
+ return decode_registered_user_data_afd(&h->afd, gb, size);
case MKBETAG('G', 'A', '9', '4'): // closed captions
- return decode_registered_user_data_closed_caption(h, size);
+ return decode_registered_user_data_closed_caption(&h->a53_caption, gb,
+ logctx, size);
default:
- skip_bits(&h->gb, size * 8);
+ skip_bits(gb, size * 8);
break;
}
return 0;
}
-static int decode_unregistered_user_data(H264Context *h, int size)
+static int decode_unregistered_user_data(H264SEIUnregistered *h, GetBitContext *gb,
+ void *logctx, int size)
{
- uint8_t user_data[16 + 256];
+ uint8_t *user_data;
int e, build, i;
- if (size < 16)
+ if (size < 16 || size >= INT_MAX - 16)
return AVERROR_INVALIDDATA;
- for (i = 0; i < sizeof(user_data) - 1 && i < size; i++)
- user_data[i] = get_bits(&h->gb, 8);
+ user_data = av_malloc(16 + size + 1);
+ if (!user_data)
+ return AVERROR(ENOMEM);
+
+ for (i = 0; i < size + 16; i++)
+ user_data[i] = get_bits(gb, 8);
user_data[i] = 0;
e = sscanf(user_data + 16, "x264 - core %d", &build);
if (e == 1 && build > 0)
h->x264_build = build;
- if (h->avctx->debug & FF_DEBUG_BUGS)
- av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
-
- for (; i < size; i++)
- skip_bits(&h->gb, 8);
+ if (strlen(user_data + 16) > 0)
+ av_log(logctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
+ av_free(user_data);
return 0;
}
-static int decode_recovery_point(H264Context *h)
+static int decode_recovery_point(H264SEIRecoveryPoint *h, GetBitContext *gb)
{
- h->sei_recovery_frame_cnt = get_ue_golomb(&h->gb);
+ h->recovery_frame_cnt = get_ue_golomb(gb);
/* 1b exact_match_flag,
* 1b broken_link_flag,
* 2b changing_slice_group_idc */
- skip_bits(&h->gb, 4);
+ skip_bits(gb, 4);
return 0;
}
-static int decode_buffering_period(H264Context *h)
+static int decode_buffering_period(H264SEIBufferingPeriod *h, GetBitContext *gb,
+ const H264ParamSets *ps, void *logctx)
{
unsigned int sps_id;
int sched_sel_idx;
SPS *sps;
- sps_id = get_ue_golomb_31(&h->gb);
- if (sps_id > 31 || !h->sps_buffers[sps_id]) {
- av_log(h->avctx, AV_LOG_ERROR,
+ sps_id = get_ue_golomb_31(gb);
+ if (sps_id > 31 || !ps->sps_list[sps_id]) {
+ av_log(logctx, AV_LOG_ERROR,
"non-existing SPS %d referenced in buffering period\n", sps_id);
return AVERROR_INVALIDDATA;
}
- sps = h->sps_buffers[sps_id];
+ sps = (SPS*)ps->sps_list[sps_id]->data;
// NOTE: This is really so duplicated in the standard... See H.264, D.1.1
if (sps->nal_hrd_parameters_present_flag) {
for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
h->initial_cpb_removal_delay[sched_sel_idx] =
- get_bits(&h->gb, sps->initial_cpb_removal_delay_length);
+ get_bits(gb, sps->initial_cpb_removal_delay_length);
// initial_cpb_removal_delay_offset
- skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
+ skip_bits(gb, sps->initial_cpb_removal_delay_length);
}
}
if (sps->vcl_hrd_parameters_present_flag) {
for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
h->initial_cpb_removal_delay[sched_sel_idx] =
- get_bits(&h->gb, sps->initial_cpb_removal_delay_length);
+ get_bits(gb, sps->initial_cpb_removal_delay_length);
// initial_cpb_removal_delay_offset
- skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
+ skip_bits(gb, sps->initial_cpb_removal_delay_length);
}
}
- h->sei_buffering_period_present = 1;
+ h->present = 1;
return 0;
}
-static int decode_frame_packing_arrangement(H264Context *h)
+static int decode_frame_packing_arrangement(H264SEIFramePacking *h,
+ GetBitContext *gb)
{
- get_ue_golomb(&h->gb); // frame_packing_arrangement_id
- h->sei_frame_packing_present = !get_bits1(&h->gb);
+ get_ue_golomb(gb); // frame_packing_arrangement_id
+ h->present = !get_bits1(gb);
- if (h->sei_frame_packing_present) {
- h->frame_packing_arrangement_type = get_bits(&h->gb, 7);
- h->quincunx_subsampling = get_bits1(&h->gb);
- h->content_interpretation_type = get_bits(&h->gb, 6);
+ if (h->present) {
+ h->arrangement_type = get_bits(gb, 7);
+ h->quincunx_subsampling = get_bits1(gb);
+ h->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(&h->gb, 6);
+ skip_bits(gb, 6);
- if (!h->quincunx_subsampling && h->frame_packing_arrangement_type != 5)
- skip_bits(&h->gb, 16); // frame[01]_grid_position_[xy]
- skip_bits(&h->gb, 8); // frame_packing_arrangement_reserved_byte
- get_ue_golomb(&h->gb); // frame_packing_arrangement_repetition_period
+ if (!h->quincunx_subsampling && h->arrangement_type != 5)
+ skip_bits(gb, 16); // frame[01]_grid_position_[xy]
+ skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
+ get_ue_golomb(gb); // frame_packing_arrangement_repetition_period
}
- skip_bits1(&h->gb); // frame_packing_arrangement_extension_flag
+ skip_bits1(gb); // frame_packing_arrangement_extension_flag
return 0;
}
-static int decode_display_orientation(H264Context *h)
+static int decode_display_orientation(H264SEIDisplayOrientation *h,
+ GetBitContext *gb)
{
- h->sei_display_orientation_present = !get_bits1(&h->gb);
+ h->present = !get_bits1(gb);
- if (h->sei_display_orientation_present) {
- h->sei_hflip = get_bits1(&h->gb); // hor_flip
- h->sei_vflip = get_bits1(&h->gb); // ver_flip
+ if (h->present) {
+ h->hflip = get_bits1(gb); // hor_flip
+ h->vflip = get_bits1(gb); // ver_flip
- h->sei_anticlockwise_rotation = get_bits(&h->gb, 16);
- get_ue_golomb(&h->gb); // display_orientation_repetition_period
- skip_bits1(&h->gb); // display_orientation_extension_flag
+ h->anticlockwise_rotation = get_bits(gb, 16);
+ get_ue_golomb(gb); // display_orientation_repetition_period
+ skip_bits1(gb); // display_orientation_extension_flag
}
return 0;
}
-int ff_h264_decode_sei(H264Context *h)
+int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb,
+ const H264ParamSets *ps, void *logctx)
{
- while (get_bits_left(&h->gb) > 16) {
+ while (get_bits_left(gb) > 16) {
int size = 0;
int type = 0;
int ret = 0;
int last = 0;
- while (get_bits_left(&h->gb) >= 8 &&
- (last = get_bits(&h->gb, 8)) == 255) {
+ while (get_bits_left(gb) >= 8 &&
+ (last = get_bits(gb, 8)) == 255) {
type += 255;
}
type += last;
last = 0;
- while (get_bits_left(&h->gb) >= 8 &&
- (last = get_bits(&h->gb, 8)) == 255) {
+ while (get_bits_left(gb) >= 8 &&
+ (last = get_bits(gb, 8)) == 255) {
size += 255;
}
size += last;
- if (size > get_bits_left(&h->gb) / 8) {
- av_log(h->avctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n",
- type, get_bits_left(&h->gb));
+ if (size > get_bits_left(gb) / 8) {
+ av_log(logctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n",
+ type, get_bits_left(gb));
return AVERROR_INVALIDDATA;
}
switch (type) {
case SEI_TYPE_PIC_TIMING: // Picture timing SEI
- ret = decode_picture_timing(h);
+ ret = decode_picture_timing(&h->picture_timing, gb, ps->sps, logctx);
break;
case SEI_TYPE_USER_DATA_REGISTERED:
- ret = decode_registered_user_data(h, size);
+ ret = decode_registered_user_data(h, gb, logctx, size);
break;
case SEI_TYPE_USER_DATA_UNREGISTERED:
- ret = decode_unregistered_user_data(h, size);
+ ret = decode_unregistered_user_data(&h->unregistered, gb, logctx, size);
break;
case SEI_TYPE_RECOVERY_POINT:
- ret = decode_recovery_point(h);
+ ret = decode_recovery_point(&h->recovery_point, gb);
break;
case SEI_TYPE_BUFFERING_PERIOD:
- ret = decode_buffering_period(h);
+ ret = decode_buffering_period(&h->buffering_period, gb, ps, logctx);
break;
case SEI_TYPE_FRAME_PACKING:
- ret = decode_frame_packing_arrangement(h);
+ ret = decode_frame_packing_arrangement(&h->frame_packing, gb);
break;
case SEI_TYPE_DISPLAY_ORIENTATION:
- ret = decode_display_orientation(h);
+ ret = decode_display_orientation(&h->display_orientation, gb);
break;
default:
- av_log(h->avctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
- skip_bits(&h->gb, 8 * size);
+ av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
+ skip_bits(gb, 8 * size);
}
if (ret < 0)
return ret;
// FIXME check bits here
- align_get_bits(&h->gb);
+ align_get_bits(gb);
}
return 0;
projects / ffmpeg / blobdiff