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h264: decouple h264_sei from the h264 decoder 

Make the SEI parsing independent of the H264Context, to allow
decoupling the parser from the decoder.
tags/n3.1
Anton Khirnov 9 years ago
parent
c8dcff0cdb
commit
728d90a0c1
7 changed files with 333 additions and 275 deletions
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  1. +39
    -35
      libavcodec/h264.c
  2. +3
    -100
      libavcodec/h264.h
  3. +2
    -2
      libavcodec/h264_direct.c
  4. +13
    -9
      libavcodec/h264_parser.c
  5. +138
    -128
      libavcodec/h264_sei.c
  6. +137
    -0
      libavcodec/h264_sei.h
  7. +1
    -1
      libavcodec/h264_slice.c

+ 39
- 35
libavcodec/h264.c View File

@@ -400,7 +400,6 @@ static int h264_init_context(AVCodecContext *avctx, H264Context *h)
h->workaround_bugs = avctx->workaround_bugs;
h->flags = avctx->flags;
h->poc.prev_poc_msb = 1 << 16;
h->x264_build = -1;
h->recovery_frame = -1;
h->frame_recovered = 0;

@@ -408,7 +407,7 @@ static int h264_init_context(AVCodecContext *avctx, H264Context *h)
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;

ff_h264_reset_sei(h);
ff_h264_sei_uninit(&h->sei);

avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;

@@ -545,7 +544,8 @@ static void decode_postinit(H264Context *h, int setup_finished)
* decoding process if it exists. */

if (sps->pic_struct_present_flag) {
switch (h->sei_pic_struct) {
H264SEIPictureTiming *pt = &h->sei.picture_timing;
switch (pt->pic_struct) {
case SEI_PIC_STRUCT_FRAME:
break;
case SEI_PIC_STRUCT_TOP_FIELD:
@@ -575,9 +575,9 @@ static void decode_postinit(H264Context *h, int setup_finished)
break;
}

if ((h->sei_ct_type & 3) &&
h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
cur->f->interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
if ((pt->ct_type & 3) &&
pt->pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
cur->f->interlaced_frame = (pt->ct_type & (1 << 1)) != 0;
} else {
/* Derive interlacing flag from used decoding process. */
cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
@@ -591,8 +591,8 @@ static void decode_postinit(H264Context *h, int setup_finished)
if (cur->f->interlaced_frame || sps->pic_struct_present_flag) {
/* Use picture timing SEI information. Even if it is a
* information of a past frame, better than nothing. */
if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
if (h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
cur->f->top_field_first = 1;
else
cur->f->top_field_first = 0;
@@ -602,16 +602,17 @@ static void decode_postinit(H264Context *h, int setup_finished)
}
}

if (h->sei_frame_packing_present &&
h->frame_packing_arrangement_type >= 0 &&
h->frame_packing_arrangement_type <= 6 &&
h->content_interpretation_type > 0 &&
h->content_interpretation_type < 3) {
if (h->sei.frame_packing.present &&
h->sei.frame_packing.arrangement_type >= 0 &&
h->sei.frame_packing.arrangement_type <= 6 &&
h->sei.frame_packing.content_interpretation_type > 0 &&
h->sei.frame_packing.content_interpretation_type < 3) {
H264SEIFramePacking *fp = &h->sei.frame_packing;
AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
if (!stereo)
return;

switch (h->frame_packing_arrangement_type) {
switch (fp->arrangement_type) {
case 0:
stereo->type = AV_STEREO3D_CHECKERBOARD;
break;
@@ -622,7 +623,7 @@ static void decode_postinit(H264Context *h, int setup_finished)
stereo->type = AV_STEREO3D_LINES;
break;
case 3:
if (h->quincunx_subsampling)
if (fp->quincunx_subsampling)
stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
else
stereo->type = AV_STEREO3D_SIDEBYSIDE;
@@ -638,13 +639,16 @@ static void decode_postinit(H264Context *h, int setup_finished)
break;
}

if (h->content_interpretation_type == 2)
if (fp->content_interpretation_type == 2)
stereo->flags = AV_STEREO3D_FLAG_INVERT;
}

if (h->sei_display_orientation_present &&
(h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
if (h->sei.display_orientation.present &&
(h->sei.display_orientation.anticlockwise_rotation ||
h->sei.display_orientation.hflip ||
h->sei.display_orientation.vflip)) {
H264SEIDisplayOrientation *o = &h->sei.display_orientation;
double angle = o->anticlockwise_rotation * 360 / (double) (1 << 16);
AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
AV_FRAME_DATA_DISPLAYMATRIX,
sizeof(int32_t) * 9);
@@ -653,29 +657,30 @@ static void decode_postinit(H264Context *h, int setup_finished)

av_display_rotation_set((int32_t *)rotation->data, angle);
av_display_matrix_flip((int32_t *)rotation->data,
h->sei_hflip, h->sei_vflip);
o->hflip, o->vflip);
}

if (h->sei_reguserdata_afd_present) {
if (h->sei.afd.present) {
AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
sizeof(uint8_t));
if (!sd)
return;

*sd->data = h->active_format_description;
h->sei_reguserdata_afd_present = 0;
*sd->data = h->sei.afd.active_format_description;
h->sei.afd.present = 0;
}

if (h->a53_caption) {
if (h->sei.a53_caption.a53_caption) {
H264SEIA53Caption *a53 = &h->sei.a53_caption;
AVFrameSideData *sd = av_frame_new_side_data(cur->f,
AV_FRAME_DATA_A53_CC,
h->a53_caption_size);
a53->a53_caption_size);
if (!sd)
return;

memcpy(sd->data, h->a53_caption, h->a53_caption_size);
av_freep(&h->a53_caption);
h->a53_caption_size = 0;
memcpy(sd->data, a53->a53_caption, a53->a53_caption_size);
av_freep(&a53->a53_caption);
a53->a53_caption_size = 0;
}

// FIXME do something with unavailable reference frames
@@ -831,7 +836,7 @@ void ff_h264_flush_change(H264Context *h)
if (h->cur_pic_ptr)
h->cur_pic_ptr->reference = 0;
h->first_field = 0;
ff_h264_reset_sei(h);
ff_h264_sei_uninit(&h->sei);
h->recovery_frame = -1;
h->frame_recovered = 0;
}
@@ -927,7 +932,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
h->current_slice = 0;
if (!h->first_field)
h->cur_pic_ptr = NULL;
ff_h264_reset_sei(h);
ff_h264_sei_uninit(&h->sei);
}

ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
@@ -984,13 +989,13 @@ again:
if ((err = ff_h264_decode_slice_header(h, sl)))
break;

if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
h->recovery_frame = (h->poc.frame_num + h->sei_recovery_frame_cnt) &
if (h->sei.recovery_point.recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
h->recovery_frame = (h->poc.frame_num + h->sei.recovery_point.recovery_frame_cnt) &
((1 << h->ps.sps->log2_max_frame_num) - 1);
}

h->cur_pic_ptr->f->key_frame |=
(nal->type == NAL_IDR_SLICE) || (h->sei_recovery_frame_cnt >= 0);
(nal->type == NAL_IDR_SLICE) || (h->sei.recovery_point.recovery_frame_cnt >= 0);

if (nal->type == NAL_IDR_SLICE || h->recovery_frame == h->poc.frame_num) {
h->recovery_frame = -1;
@@ -1034,8 +1039,7 @@ again:
goto end;
break;
case NAL_SEI:
h->gb = nal->gb;
ret = ff_h264_decode_sei(h);
ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;


+ 3
- 100
libavcodec/h264.h View File

@@ -35,6 +35,7 @@
#include "error_resilience.h"
#include "get_bits.h"
#include "h264_parse.h"
#include "h264_sei.h"
#include "h2645_parse.h"
#include "h264chroma.h"
#include "h264dsp.h"
@@ -127,34 +128,6 @@ enum {
NAL_FF_IGNORE = 0xff0f001,
};

/**
* SEI message types
*/
typedef enum {
SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
SEI_TYPE_PIC_TIMING = 1, ///< picture timing
SEI_TYPE_USER_DATA_REGISTERED = 4, ///< registered user data as specified by Rec. ITU-T T.35
SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
SEI_TYPE_DISPLAY_ORIENTATION = 47, ///< display orientation
} SEI_Type;

/**
* pic_struct in picture timing SEI message
*/
typedef enum {
SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
} SEI_PicStructType;

/**
* Sequence parameter set
*/
@@ -551,8 +524,6 @@ typedef struct H264Context {
const uint8_t *field_scan8x8_q0;
const uint8_t *field_scan8x8_cavlc_q0;

int x264_build;

int mb_y;
int mb_height, mb_width;
int mb_stride;
@@ -635,11 +606,6 @@ typedef struct H264Context {

/** @} */

/**
* pic_struct in picture timing SEI message
*/
SEI_PicStructType sei_pic_struct;

/**
* Complement sei_pic_struct
* SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
@@ -648,55 +614,6 @@ typedef struct H264Context {
*/
int prev_interlaced_frame;

/**
* frame_packing_arrangment SEI message
*/
int sei_frame_packing_present;
int frame_packing_arrangement_type;
int content_interpretation_type;
int quincunx_subsampling;

/**
* display orientation SEI message
*/
int sei_display_orientation_present;
int sei_anticlockwise_rotation;
int sei_hflip, sei_vflip;

/**
* User data registered by Rec. ITU-T T.35 SEI
*/
int sei_reguserdata_afd_present;
uint8_t active_format_description;
int a53_caption_size;
uint8_t *a53_caption;

/**
* Bit set of clock types for fields/frames in picture timing SEI message.
* For each found ct_type, appropriate bit is set (e.g., bit 1 for
* interlaced).
*/
int sei_ct_type;

/**
* dpb_output_delay in picture timing SEI message, see H.264 C.2.2
*/
int sei_dpb_output_delay;

/**
* cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
*/
int sei_cpb_removal_delay;

/**
* recovery_frame_cnt from SEI message
*
* Set to -1 if no recovery point SEI message found or to number of frames
* before playback synchronizes. Frames having recovery point are key
* frames.
*/
int sei_recovery_frame_cnt;

/**
* recovery_frame is the frame_num at which the next frame should
* be fully constructed.
@@ -724,12 +641,10 @@ typedef struct H264Context {
* slices) anymore */
int setup_finished;

// Timestamp stuff
int sei_buffering_period_present; ///< Buffering period SEI flag
int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs

int enable_er;

H264SEIContext sei;

AVBufferPool *qscale_table_pool;
AVBufferPool *mb_type_pool;
AVBufferPool *motion_val_pool;
@@ -742,11 +657,6 @@ typedef struct H264Context {

extern const uint16_t ff_h264_mb_sizes[4];

/**
* Decode SEI
*/
int ff_h264_decode_sei(H264Context *h);

/**
* Decode SPS
*/
@@ -828,13 +738,6 @@ void ff_h264_filter_mb(const H264Context *h, H264SliceContext *sl, int mb_x, int
uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
unsigned int linesize, unsigned int uvlinesize);

/**
* Reset SEI values at the beginning of the frame.
*
* @param h H.264 context.
*/
void ff_h264_reset_sei(H264Context *h);

/*
* o-o o-o
* / / /


+ 2
- 2
libavcodec/h264_direct.c View File

@@ -390,7 +390,7 @@ single_col:
(l1ref0[0] < 0 && !l1ref1[0] &&
FFABS(l1mv1[0][0]) <= 1 &&
FFABS(l1mv1[0][1]) <= 1 &&
h->x264_build > 33U))) {
h->sei.unregistered.x264_build > 33U))) {
a = b = 0;
if (ref[0] > 0)
a = mv[0];
@@ -425,7 +425,7 @@ single_col:
(l1ref0[i8] == 0 ||
(l1ref0[i8] < 0 &&
l1ref1[i8] == 0 &&
h->x264_build > 33U))) {
h->sei.unregistered.x264_build > 33U))) {
const int16_t (*l1mv)[2] = l1ref0[i8] == 0 ? l1mv0 : l1mv1;
if (IS_SUB_8X8(sub_mb_type)) {
const int16_t *mv_col = l1mv[x8 * 3 + y8 * 3 * b4_stride];


+ 13
- 9
libavcodec/h264_parser.c View File

@@ -37,6 +37,7 @@
#include "get_bits.h"
#include "golomb.h"
#include "h264.h"
#include "h264_sei.h"
#include "h264data.h"
#include "internal.h"
#include "mpegutils.h"
@@ -48,6 +49,7 @@ typedef struct H264ParseContext {
H264ParamSets ps;
H264DSPContext h264dsp;
H264POCContext poc;
H264SEIContext sei;
int got_first;
} H264ParseContext;

@@ -216,7 +218,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;

h->avctx = avctx;
ff_h264_reset_sei(h);
ff_h264_sei_uninit(&p->sei);

if (!buf_size)
return 0;
@@ -270,7 +272,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
nal.size_bits);
break;
case NAL_SEI:
ff_h264_decode_sei(h);
ff_h264_sei_decode(&p->sei, &nal.gb, &p->ps, avctx);
break;
case NAL_IDR_SLICE:
s->key_frame = 1;
@@ -284,7 +286,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
get_ue_golomb(&nal.gb); // skip first_mb_in_slice
slice_type = get_ue_golomb_31(&nal.gb);
s->pict_type = ff_h264_golomb_to_pict_type[slice_type % 5];
if (h->sei_recovery_frame_cnt >= 0) {
if (p->sei.recovery_point.recovery_frame_cnt >= 0) {
/* key frame, since recovery_frame_cnt is set */
s->key_frame = 1;
}
@@ -405,7 +407,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
}

if (sps->pic_struct_present_flag) {
switch (h->sei_pic_struct) {
switch (p->sei.picture_timing.pic_struct) {
case SEI_PIC_STRUCT_TOP_FIELD:
case SEI_PIC_STRUCT_BOTTOM_FIELD:
s->repeat_pict = 0;
@@ -436,7 +438,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
if (h->picture_structure == PICT_FRAME) {
s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
if (sps->pic_struct_present_flag) {
switch (h->sei_pic_struct) {
switch (p->sei.picture_timing.pic_struct) {
case SEI_PIC_STRUCT_TOP_BOTTOM:
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
s->field_order = AV_FIELD_TT;
@@ -521,10 +523,10 @@ static int h264_parse(AVCodecParserContext *s,

parse_nal_units(s, avctx, buf, buf_size);

if (h->sei_cpb_removal_delay >= 0) {
s->dts_sync_point = h->sei_buffering_period_present;
s->dts_ref_dts_delta = h->sei_cpb_removal_delay;
s->pts_dts_delta = h->sei_dpb_output_delay;
if (p->sei.picture_timing.cpb_removal_delay >= 0) {
s->dts_sync_point = p->sei.buffering_period.present;
s->dts_ref_dts_delta = p->sei.picture_timing.cpb_removal_delay;
s->pts_dts_delta = p->sei.picture_timing.dpb_output_delay;
} else {
s->dts_sync_point = INT_MIN;
s->dts_ref_dts_delta = INT_MIN;
@@ -581,6 +583,8 @@ static void h264_close(AVCodecParserContext *s)
av_free(pc->buffer);
ff_h264_free_context(h);

ff_h264_sei_uninit(&p->sei);

for (i = 0; i < FF_ARRAY_ELEMS(p->ps.sps_list); i++)
av_buffer_unref(&p->ps.sps_list[i]);



+ 138
- 128
libavcodec/h264_sei.c View File

@@ -26,113 +26,116 @@
*/

#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "h264.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)
{
const SPS *sps = h->ps.sps;

if (!sps)
return AVERROR_INVALIDDATA;

if (sps->nal_hrd_parameters_present_flag ||
sps->vcl_hrd_parameters_present_flag) {
h->sei_cpb_removal_delay = get_bits(&h->gb,
sps->cpb_removal_delay_length);
h->sei_dpb_output_delay = get_bits(&h->gb,
sps->dpb_output_delay_length);
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 (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 (sps->time_offset_length > 0)
skip_bits(&h->gb,
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;
@@ -141,15 +144,15 @@ static int decode_registered_user_data_closed_caption(H264Context *h, int size)
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) {
@@ -166,26 +169,27 @@ static int decode_registered_user_data_closed_caption(H264Context *h, int size)
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(h->avctx, "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;
@@ -194,31 +198,33 @@ static int decode_registered_user_data(H264Context *h, int size)
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;
int e, build, i;
@@ -231,7 +237,7 @@ static int decode_unregistered_user_data(H264Context *h, int size)
return AVERROR(ENOMEM);

for (i = 0; i < size + 16; i++)
user_data[i] = get_bits(&h->gb, 8);
user_data[i] = get_bits(gb, 8);

user_data[i] = 0;
e = sscanf(user_data + 16, "x264 - core %d", &build);
@@ -239,159 +245,163 @@ static int decode_unregistered_user_data(H264Context *h, int size)
h->x264_build = build;

if (strlen(user_data + 16) > 0)
av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
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->ps.sps_list[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 = (SPS*)h->ps.sps_list[sps_id]->data;
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;


+ 137
- 0
libavcodec/h264_sei.h View File

@@ -0,0 +1,137 @@
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef AVCODEC_H264_SEI_H
#define AVCODEC_H264_SEI_H

#include "get_bits.h"

/**
* SEI message types
*/
typedef enum {
SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
SEI_TYPE_PIC_TIMING = 1, ///< picture timing
SEI_TYPE_USER_DATA_REGISTERED = 4, ///< registered user data as specified by Rec. ITU-T T.35
SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
SEI_TYPE_DISPLAY_ORIENTATION = 47, ///< display orientation
} SEI_Type;

/**
* pic_struct in picture timing SEI message
*/
typedef enum {
SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
} SEI_PicStructType;

typedef struct H264SEIPictureTiming {
SEI_PicStructType pic_struct;

/**
* Bit set of clock types for fields/frames in picture timing SEI message.
* For each found ct_type, appropriate bit is set (e.g., bit 1 for
* interlaced).
*/
int ct_type;

/**
* dpb_output_delay in picture timing SEI message, see H.264 C.2.2
*/
int dpb_output_delay;

/**
* cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
*/
int cpb_removal_delay;
} H264SEIPictureTiming;

typedef struct H264SEIAFD {
int present;
uint8_t active_format_description;
} H264SEIAFD;

typedef struct H264SEIA53Caption {
int a53_caption_size;
uint8_t *a53_caption;
} H264SEIA53Caption;

typedef struct H264SEIUnregistered {
int x264_build;
} H264SEIUnregistered;

typedef struct H264SEIRecoveryPoint {
/**
* recovery_frame_cnt
*
* Set to -1 if no recovery point SEI message found or to number of frames
* before playback synchronizes. Frames having recovery point are key
* frames.
*/
int recovery_frame_cnt;
} H264SEIRecoveryPoint;

typedef struct H264SEIBufferingPeriod {
int present; ///< Buffering period SEI flag
int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
} H264SEIBufferingPeriod;

typedef struct H264SEIFramePacking {
int present;
int arrangement_type;
int content_interpretation_type;
int quincunx_subsampling;
} H264SEIFramePacking;

typedef struct H264SEIDisplayOrientation {
int present;
int anticlockwise_rotation;
int hflip, vflip;
} H264SEIDisplayOrientation;

typedef struct H264SEIContext {
H264SEIPictureTiming picture_timing;
H264SEIAFD afd;
H264SEIA53Caption a53_caption;
H264SEIUnregistered unregistered;
H264SEIRecoveryPoint recovery_point;
H264SEIBufferingPeriod buffering_period;
H264SEIFramePacking frame_packing;
H264SEIDisplayOrientation display_orientation;
} H264SEIContext;

struct H264ParamSets;

int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb,
const struct H264ParamSets *ps, void *logctx);

/**
* Reset SEI values at the beginning of the frame.
*/
void ff_h264_sei_uninit(H264SEIContext *h);

#endif /* AVCODEC_H264_SEI_H */

+ 1
- 1
libavcodec/h264_slice.c View File

@@ -826,7 +826,7 @@ static int h264_slice_header_init(H264Context *h)

if (sps->timing_info_present_flag) {
int64_t den = sps->time_scale;
if (h->x264_build < 44U)
if (h->sei.unregistered.x264_build < 44U)
den *= 2;
av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
sps->num_units_in_tick, den, 1 << 30);


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