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h264: use the main H264Context as the parent for all slice contexts

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There is now no need to have per-slice copies of the H264Context.
This commit is contained in:
Anton Khirnov 2015-01-28 13:26:24 +01:00
parent 92e0b7342c
commit 51d8725a6e
3 changed files with 69 additions and 111 deletions
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42
libavcodec/h264.c
View File

@ -655,7 +655,7 @@ av_cold int ff_h264_decode_init(AVCodecContext *avctx)
h->thread_context[0] = h;
for (i = 0; i < h->nb_slice_ctx; i++)
h->slice_ctx[i].h264 = h->thread_context[0];
h->slice_ctx[i].h264 = h;
h->outputed_poc = h->next_outputed_poc = INT_MIN;
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
@ -1422,7 +1422,6 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
int parse_extradata)
{
AVCodecContext *const avctx = h->avctx;
H264Context *hx; ///< thread context
H264SliceContext *sl;
int buf_index;
unsigned context_count;
@ -1468,10 +1467,9 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
continue;
}
hx = h->thread_context[context_count];
sl = &h->slice_ctx[context_count];
ptr = ff_h264_decode_nal(hx, sl, buf + buf_index, &dst_length,
ptr = ff_h264_decode_nal(h, sl, buf + buf_index, &dst_length,
&consumed, next_avc - buf_index);
if (!ptr || dst_length < 0) {
ret = -1;
@ -1484,7 +1482,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
if (h->avctx->debug & FF_DEBUG_STARTCODE)
av_log(h->avctx, AV_LOG_DEBUG,
"NAL %d at %d/%d length %d\n",
hx->nal_unit_type, buf_index, buf_size, dst_length);
h->nal_unit_type, buf_index, buf_size, dst_length);
if (h->is_avc && (nalsize != consumed) && nalsize)
av_log(h->avctx, AV_LOG_DEBUG,
@ -1505,17 +1503,17 @@ again:
* with frame-mt */
if (parse_extradata && HAVE_THREADS &&
(h->avctx->active_thread_type & FF_THREAD_FRAME) &&
(hx->nal_unit_type != NAL_PPS &&
hx->nal_unit_type != NAL_SPS)) {
if (hx->nal_unit_type < NAL_AUD ||
hx->nal_unit_type > NAL_AUXILIARY_SLICE)
(h->nal_unit_type != NAL_PPS &&
h->nal_unit_type != NAL_SPS)) {
if (h->nal_unit_type < NAL_AUD ||
h->nal_unit_type > NAL_AUXILIARY_SLICE)
av_log(avctx, AV_LOG_INFO,
"Ignoring NAL unit %d during extradata parsing\n",
hx->nal_unit_type);
hx->nal_unit_type = NAL_FF_IGNORE;
h->nal_unit_type);
h->nal_unit_type = NAL_FF_IGNORE;
}
err = 0;
switch (hx->nal_unit_type) {
switch (h->nal_unit_type) {
case NAL_IDR_SLICE:
if (h->nal_unit_type != NAL_IDR_SLICE) {
av_log(h->avctx, AV_LOG_ERROR,
@ -1527,7 +1525,7 @@ again:
case NAL_SLICE:
init_get_bits(&sl->gb, ptr, bit_length);
if ((err = ff_h264_decode_slice_header(hx, sl, h)))
if ((err = ff_h264_decode_slice_header(h, sl)))
break;
if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
@ -1536,17 +1534,17 @@ again:
}
h->cur_pic_ptr->f.key_frame |=
(hx->nal_unit_type == NAL_IDR_SLICE) ||
(h->nal_unit_type == NAL_IDR_SLICE) ||
(h->sei_recovery_frame_cnt >= 0);
if (hx->nal_unit_type == NAL_IDR_SLICE ||
if (h->nal_unit_type == NAL_IDR_SLICE ||
h->recovery_frame == h->frame_num) {
h->recovery_frame = -1;
h->cur_pic_ptr->recovered = 1;
}
// If we have an IDR, all frames after it in decoded order are
// "recovered".
if (hx->nal_unit_type == NAL_IDR_SLICE)
if (h->nal_unit_type == NAL_IDR_SLICE)
h->frame_recovered |= FRAME_RECOVERED_IDR;
h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
@ -1561,7 +1559,7 @@ again:
if (sl->redundant_pic_count == 0 &&
(avctx->skip_frame < AVDISCARD_NONREF ||
hx->nal_ref_idc) &&
h->nal_ref_idc) &&
(avctx->skip_frame < AVDISCARD_BIDIR ||
sl->slice_type_nos != AV_PICTURE_TYPE_B) &&
(avctx->skip_frame < AVDISCARD_NONKEY ||
@ -1623,7 +1621,7 @@ again:
break;
default:
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
hx->nal_unit_type, bit_length);
h->nal_unit_type, bit_length);
}
if (context_count == h->max_contexts) {
@ -1637,13 +1635,9 @@ again:
av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
} else if (err == 1) {
/* Slice could not be decoded in parallel mode, copy down
* NAL unit stuff to context 0 and restart. Note that
* rbsp_buffer is not transferred, but since we no longer
/* Slice could not be decoded in parallel mode, restart. Note
* that rbsp_buffer is not transferred, but since we no longer
* run in parallel mode this should not be an issue. */
h->nal_unit_type = hx->nal_unit_type;
h->nal_ref_idc = hx->nal_ref_idc;
hx = h;
sl = &h->slice_ctx[0];
goto again;
}

2
libavcodec/h264.h
View File

@ -1070,7 +1070,7 @@ int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
int ff_pred_weight_table(H264Context *h, H264SliceContext *sl);
int ff_set_ref_count(H264Context *h, H264SliceContext *sl);
int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Context *h0);
int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl);
int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count);
int ff_h264_update_thread_context(AVCodecContext *dst,
const AVCodecContext *src);

136
libavcodec/h264_slice.c
View File

@ -904,34 +904,6 @@ static void init_scan_tables(H264Context *h)
}
}
/**
* Replicate H264 "master" context to thread contexts.
*/
static int clone_slice(H264Context *dst, H264Context *src)
{
memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
dst->cur_pic_ptr = src->cur_pic_ptr;
dst->cur_pic = src->cur_pic;
dst->linesize = src->linesize;
dst->uvlinesize = src->uvlinesize;
dst->first_field = src->first_field;
dst->prev_poc_msb = src->prev_poc_msb;
dst->prev_poc_lsb = src->prev_poc_lsb;
dst->prev_frame_num_offset = src->prev_frame_num_offset;
dst->prev_frame_num = src->prev_frame_num;
dst->short_ref_count = src->short_ref_count;
memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
return 0;
}
static enum AVPixelFormat get_pixel_format(H264Context *h)
{
#define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
@ -1154,12 +1126,10 @@ static int h264_slice_header_init(H264Context *h, int reinit)
* This will (re)intialize the decoder and call h264_frame_start() as needed.
*
* @param h h264context
* @param h0 h264 master context (differs from 'h' when doing sliced based
* parallel decoding)
*
* @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
*/
int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Context *h0)
int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
{
unsigned int first_mb_in_slice;
unsigned int pps_id;
@ -1176,12 +1146,12 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
first_mb_in_slice = get_ue_golomb(&sl->gb);
if (first_mb_in_slice == 0) { // FIXME better field boundary detection
if (h0->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
ff_h264_field_end(h, sl, 1);
}
h0->current_slice = 0;
if (!h0->first_field) {
h->current_slice = 0;
if (!h->first_field) {
if (h->cur_pic_ptr && !h->droppable) {
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
h->picture_structure == PICT_BOTTOM_FIELD);
@ -1205,7 +1175,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
slice_type = golomb_to_pict_type[slice_type];
if (slice_type == AV_PICTURE_TYPE_I ||
(h0->current_slice != 0 && slice_type == h0->last_slice_type)) {
(h->current_slice != 0 && slice_type == h->last_slice_type)) {
default_ref_list_done = 1;
}
sl->slice_type = slice_type;
@ -1225,15 +1195,15 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
return AVERROR_INVALIDDATA;
}
if (!h0->pps_buffers[pps_id]) {
if (!h->pps_buffers[pps_id]) {
av_log(h->avctx, AV_LOG_ERROR,
"non-existing PPS %u referenced\n",
pps_id);
return AVERROR_INVALIDDATA;
}
h->pps = *h0->pps_buffers[pps_id];
h->pps = *h->pps_buffers[pps_id];
if (!h0->sps_buffers[h->pps.sps_id]) {
if (!h->sps_buffers[h->pps.sps_id]) {
av_log(h->avctx, AV_LOG_ERROR,
"non-existing SPS %u referenced\n",
h->pps.sps_id);
@ -1241,10 +1211,10 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
}
if (h->pps.sps_id != h->sps.sps_id ||
h0->sps_buffers[h->pps.sps_id]->new) {
h0->sps_buffers[h->pps.sps_id]->new = 0;
h->sps_buffers[h->pps.sps_id]->new) {
h->sps_buffers[h->pps.sps_id]->new = 0;
h->sps = *h0->sps_buffers[h->pps.sps_id];
h->sps = *h->sps_buffers[h->pps.sps_id];
if (h->bit_depth_luma != h->sps.bit_depth_luma ||
h->chroma_format_idc != h->sps.chroma_format_idc) {
@ -1293,13 +1263,13 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
}
if (h->context_initialized && needs_reinit) {
if (h != h0) {
if (sl != h->slice_ctx) {
av_log(h->avctx, AV_LOG_ERROR,
"changing width %d -> %d / height %d -> %d on "
"slice %d\n",
h->width, h->avctx->coded_width,
h->height, h->avctx->coded_height,
h0->current_slice + 1);
h->current_slice + 1);
return AVERROR_INVALIDDATA;
}
@ -1319,7 +1289,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
}
}
if (!h->context_initialized) {
if (h != h0) {
if (sl != h->slice_ctx) {
av_log(h->avctx, AV_LOG_ERROR,
"Cannot (re-)initialize context during parallel decoding.\n");
return AVERROR_PATCHWELCOME;
@ -1336,7 +1306,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
}
}
if (h == h0 && h->dequant_coeff_pps != pps_id) {
if (sl == h->slice_ctx && h->dequant_coeff_pps != pps_id) {
h->dequant_coeff_pps = pps_id;
h264_init_dequant_tables(h);
}
@ -1345,8 +1315,8 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
sl->mb_mbaff = 0;
h->mb_aff_frame = 0;
last_pic_structure = h0->picture_structure;
last_pic_droppable = h0->droppable;
last_pic_structure = h->picture_structure;
last_pic_droppable = h->droppable;
h->droppable = h->nal_ref_idc == 0;
if (h->sps.frame_mbs_only_flag) {
h->picture_structure = PICT_FRAME;
@ -1362,7 +1332,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
}
sl->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
if (h0->current_slice != 0) {
if (h->current_slice != 0) {
if (last_pic_structure != h->picture_structure ||
last_pic_droppable != h->droppable) {
av_log(h->avctx, AV_LOG_ERROR,
@ -1371,10 +1341,10 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
h->picture_structure = last_pic_structure;
h->droppable = last_pic_droppable;
return AVERROR_INVALIDDATA;
} else if (!h0->cur_pic_ptr) {
} else if (!h->cur_pic_ptr) {
av_log(h->avctx, AV_LOG_ERROR,
"unset cur_pic_ptr on slice %d\n",
h0->current_slice + 1);
h->current_slice + 1);
return AVERROR_INVALIDDATA;
}
} else {
@ -1401,27 +1371,27 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
* decode frames as "finished".
* We have to do that before the "dummy" in-between frame allocation,
* since that can modify s->current_picture_ptr. */
if (h0->first_field) {
assert(h0->cur_pic_ptr);
assert(h0->cur_pic_ptr->f.buf[0]);
assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
if (h->first_field) {
assert(h->cur_pic_ptr);
assert(h->cur_pic_ptr->f.buf[0]);
assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
/* figure out if we have a complementary field pair */
if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
/* Previous field is unmatched. Don't display it, but let it
* remain for reference if marked as such. */
if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
last_pic_structure == PICT_TOP_FIELD);
}
} else {
if (h0->cur_pic_ptr->frame_num != h->frame_num) {
if (h->cur_pic_ptr->frame_num != h->frame_num) {
/* This and previous field were reference, but had
* different frame_nums. Consider this field first in
* pair. Throw away previous field except for reference
* purposes. */
if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
last_pic_structure == PICT_TOP_FIELD);
}
} else {
@ -1454,7 +1424,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
h->frame_num, h->prev_frame_num);
ret = h264_frame_start(h);
if (ret < 0) {
h0->first_field = 0;
h->first_field = 0;
return ret;
}
@ -1494,45 +1464,43 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
/* See if we have a decoded first field looking for a pair...
* We're using that to see whether to continue decoding in that
* frame, or to allocate a new one. */
if (h0->first_field) {
assert(h0->cur_pic_ptr);
assert(h0->cur_pic_ptr->f.buf[0]);
assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
if (h->first_field) {
assert(h->cur_pic_ptr);
assert(h->cur_pic_ptr->f.buf[0]);
assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
/* figure out if we have a complementary field pair */
if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
/* Previous field is unmatched. Don't display it, but let it
* remain for reference if marked as such. */
h0->cur_pic_ptr = NULL;
h0->first_field = FIELD_PICTURE(h);
h->cur_pic_ptr = NULL;
h->first_field = FIELD_PICTURE(h);
} else {
if (h0->cur_pic_ptr->frame_num != h->frame_num) {
if (h->cur_pic_ptr->frame_num != h->frame_num) {
/* This and the previous field had different frame_nums.
* Consider this field first in pair. Throw away previous
* one except for reference purposes. */
h0->first_field = 1;
h0->cur_pic_ptr = NULL;
h->first_field = 1;
h->cur_pic_ptr = NULL;
} else {
/* Second field in complementary pair */
h0->first_field = 0;
h->first_field = 0;
}
}
} else {
/* Frame or first field in a potentially complementary pair */
h0->first_field = FIELD_PICTURE(h);
h->first_field = FIELD_PICTURE(h);
}
if (!FIELD_PICTURE(h) || h0->first_field) {
if (!FIELD_PICTURE(h) || h->first_field) {
if (h264_frame_start(h) < 0) {
h0->first_field = 0;
h->first_field = 0;
return AVERROR_INVALIDDATA;
}
} else {
release_unused_pictures(h, 0);
}
}
if (h != h0 && (ret = clone_slice(h, h0)) < 0)
return ret;
h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
@ -1617,9 +1585,9 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
// further down the line. This may break decoding if the first slice is
// corrupt, thus we only do this if frame-mt is enabled.
if (h->nal_ref_idc) {
ret = ff_h264_decode_ref_pic_marking(h0, &sl->gb,
ret = ff_h264_decode_ref_pic_marking(h, &sl->gb,
!(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
h0->current_slice == 0);
h->current_slice == 0);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
return AVERROR_INVALIDDATA;
}
@ -1700,19 +1668,19 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
h->nal_ref_idc == 0))
sl->deblocking_filter = 0;
if (sl->deblocking_filter == 1 && h0->max_contexts > 1) {
if (sl->deblocking_filter == 1 && h->max_contexts > 1) {
if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
/* Cheat slightly for speed:
* Do not bother to deblock across slices. */
sl->deblocking_filter = 2;
} else {
h0->max_contexts = 1;
if (!h0->single_decode_warning) {
h->max_contexts = 1;
if (!h->single_decode_warning) {
av_log(h->avctx, AV_LOG_INFO,
"Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
h0->single_decode_warning = 1;
h->single_decode_warning = 1;
}
if (h != h0) {
if (sl != h->slice_ctx) {
av_log(h->avctx, AV_LOG_ERROR,
"Deblocking switched inside frame.\n");
return 1;
@ -1726,8 +1694,8 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
h->pps.chroma_qp_index_offset[1]) +
6 * (h->sps.bit_depth_luma - 8);
h0->last_slice_type = slice_type;
sl->slice_num = ++h0->current_slice;
h->last_slice_type = slice_type;
sl->slice_num = ++h->current_slice;
if (sl->slice_num >= MAX_SLICES) {
av_log(h->avctx, AV_LOG_ERROR,
"Too many slices, increase MAX_SLICES and recompile\n");
@ -2336,7 +2304,6 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg)
int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
{
AVCodecContext *const avctx = h->avctx;
H264Context *hx;
H264SliceContext *sl;
int i;
@ -2356,11 +2323,8 @@ int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
NULL, context_count, sizeof(h->slice_ctx[0]));
/* pull back stuff from slices to master context */
hx = h->thread_context[context_count - 1];
sl = &h->slice_ctx[context_count - 1];
h->mb_y = sl->mb_y;
h->droppable = hx->droppable;
h->picture_structure = hx->picture_structure;
for (i = 1; i < context_count; i++)
h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
}