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ffmpeg/libavcodec/h264.c

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/*
* H.26L/H.264/AVC/JVT/14496-10/... decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* 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
*/
/**
* @file
* H.264 / AVC / MPEG4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#define UNCHECKED_BITSTREAM_READER 1
#include "libavutil/avassert.h"
#include "libavutil/display.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/stereo3d.h"
#include "libavutil/timer.h"
#include "internal.h"
#include "bytestream.h"
#include "cabac.h"
#include "cabac_functions.h"
#include "error_resilience.h"
#include "avcodec.h"
#include "h264.h"
#include "h2645_parse.h"
#include "h264data.h"
#include "h264chroma.h"
#include "h264_mvpred.h"
#include "golomb.h"
#include "mathops.h"
#include "me_cmp.h"
#include "mpegutils.h"
#include "profiles.h"
#include "rectangle.h"
#include "thread.h"
#include "vdpau_compat.h"
static int h264_decode_end(AVCodecContext *avctx);
const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
return h ? h->sps.num_reorder_frames : 0;
}
static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
int (*mv)[2][4][2],
int mb_x, int mb_y, int mb_intra, int mb_skipped)
{
H264Context *h = opaque;
H264SliceContext *sl = &h->slice_ctx[0];
sl->mb_x = mb_x;
sl->mb_y = mb_y;
sl->mb_xy = mb_x + mb_y * h->mb_stride;
memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
av_assert1(ref >= 0);
/* FIXME: It is possible albeit uncommon that slice references
* differ between slices. We take the easy approach and ignore
* it for now. If this turns out to have any relevance in
* practice then correct remapping should be added. */
if (ref >= sl->ref_count[0])
ref = 0;
if (!sl->ref_list[0][ref].data[0]) {
av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
ref = 0;
}
if ((sl->ref_list[0][ref].reference&3) != 3) {
av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
return;
}
fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
2, 2, 2, ref, 1);
fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
sl->mb_mbaff =
sl->mb_field_decoding_flag = 0;
ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
}
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
int y, int height)
{
AVCodecContext *avctx = h->avctx;
const AVFrame *src = h->cur_pic.f;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
int vshift = desc->log2_chroma_h;
const int field_pic = h->picture_structure != PICT_FRAME;
if (field_pic) {
height <<= 1;
y <<= 1;
}
height = FFMIN(height, avctx->height - y);
if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
return;
if (avctx->draw_horiz_band) {
int offset[AV_NUM_DATA_POINTERS];
int i;
offset[0] = y * src->linesize[0];
offset[1] =
offset[2] = (y >> vshift) * src->linesize[1];
for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
offset[i] = 0;
emms_c();
avctx->draw_horiz_band(avctx, src, offset,
y, h->picture_structure, height);
}
}
void ff_h264_free_tables(H264Context *h)
{
int i;
av_freep(&h->intra4x4_pred_mode);
av_freep(&h->chroma_pred_mode_table);
av_freep(&h->cbp_table);
av_freep(&h->mvd_table[0]);
av_freep(&h->mvd_table[1]);
av_freep(&h->direct_table);
av_freep(&h->non_zero_count);
av_freep(&h->slice_table_base);
h->slice_table = NULL;
av_freep(&h->list_counts);
av_freep(&h->mb2b_xy);
av_freep(&h->mb2br_xy);
av_buffer_pool_uninit(&h->qscale_table_pool);
av_buffer_pool_uninit(&h->mb_type_pool);
av_buffer_pool_uninit(&h->motion_val_pool);
av_buffer_pool_uninit(&h->ref_index_pool);
for (i = 0; i < h->nb_slice_ctx; i++) {
H264SliceContext *sl = &h->slice_ctx[i];
av_freep(&sl->dc_val_base);
av_freep(&sl->er.mb_index2xy);
av_freep(&sl->er.error_status_table);
av_freep(&sl->er.er_temp_buffer);
av_freep(&sl->bipred_scratchpad);
av_freep(&sl->edge_emu_buffer);
av_freep(&sl->top_borders[0]);
av_freep(&sl->top_borders[1]);
sl->bipred_scratchpad_allocated = 0;
sl->edge_emu_buffer_allocated = 0;
sl->top_borders_allocated[0] = 0;
sl->top_borders_allocated[1] = 0;
}
}
int ff_h264_alloc_tables(H264Context *h)
{
const int big_mb_num = h->mb_stride * (h->mb_height + 1);
const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
int x, y;
FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
row_mb_num, 8 * sizeof(uint8_t), fail)
h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
big_mb_num * 48 * sizeof(uint8_t), fail)
FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
big_mb_num * sizeof(uint16_t), fail)
FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
big_mb_num * sizeof(uint8_t), fail)
FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
row_mb_num, 16 * sizeof(uint8_t), fail);
FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
row_mb_num, 16 * sizeof(uint8_t), fail);
h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
4 * big_mb_num * sizeof(uint8_t), fail);
FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
big_mb_num * sizeof(uint8_t), fail)
memset(h->slice_table_base, -1,
(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
big_mb_num * sizeof(uint32_t), fail);
FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
big_mb_num * sizeof(uint32_t), fail);
for (y = 0; y < h->mb_height; y++)
for (x = 0; x < h->mb_width; x++) {
const int mb_xy = x + y * h->mb_stride;
const int b_xy = 4 * x + 4 * y * h->b_stride;
h->mb2b_xy[mb_xy] = b_xy;
h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
}
if (!h->dequant4_coeff[0])
ff_h264_init_dequant_tables(h);
return 0;
fail:
ff_h264_free_tables(h);
return AVERROR(ENOMEM);
}
/**
* Init context
* Allocate buffers which are not shared amongst multiple threads.
*/
int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
{
ERContext *er = &sl->er;
int mb_array_size = h->mb_height * h->mb_stride;
int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
int c_size = h->mb_stride * (h->mb_height + 1);
int yc_size = y_size + 2 * c_size;
int x, y, i;
sl->ref_cache[0][scan8[5] + 1] =
sl->ref_cache[0][scan8[7] + 1] =
sl->ref_cache[0][scan8[13] + 1] =
sl->ref_cache[1][scan8[5] + 1] =
sl->ref_cache[1][scan8[7] + 1] =
sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
if (sl != h->slice_ctx) {
memset(er, 0, sizeof(*er));
} else
if (CONFIG_ERROR_RESILIENCE) {
/* init ER */
er->avctx = h->avctx;
er->decode_mb = h264_er_decode_mb;
er->opaque = h;
er->quarter_sample = 1;
er->mb_num = h->mb_num;
er->mb_width = h->mb_width;
er->mb_height = h->mb_height;
er->mb_stride = h->mb_stride;
er->b8_stride = h->mb_width * 2 + 1;
// error resilience code looks cleaner with this
FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
(h->mb_num + 1) * sizeof(int), fail);
for (y = 0; y < h->mb_height; y++)
for (x = 0; x < h->mb_width; x++)
er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
h->mb_stride + h->mb_width;
FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
mb_array_size * sizeof(uint8_t), fail);
FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
h->mb_height * h->mb_stride, fail);
FF_ALLOCZ_OR_GOTO(h->avctx, sl->dc_val_base,
yc_size * sizeof(int16_t), fail);
er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
er->dc_val[2] = er->dc_val[1] + c_size;
for (i = 0; i < yc_size; i++)
sl->dc_val_base[i] = 1024;
}
return 0;
fail:
return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
}
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
int parse_extradata);
/* There are (invalid) samples in the wild with mp4-style extradata, where the
* parameter sets are stored unescaped (i.e. as RBSP).
* This function catches the parameter set decoding failure and tries again
* after escaping it */
static int decode_extradata_ps_mp4(H264Context *h, const uint8_t *buf, int buf_size)
{
int ret;
ret = decode_nal_units(h, buf, buf_size, 1);
if (ret < 0 && !(h->avctx->err_recognition & AV_EF_EXPLODE)) {
GetByteContext gbc;
PutByteContext pbc;
uint8_t *escaped_buf;
int escaped_buf_size;
av_log(h->avctx, AV_LOG_WARNING,
"SPS decoding failure, trying again after escaping the NAL\n");
if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
return AVERROR(ERANGE);
escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
escaped_buf = av_mallocz(escaped_buf_size);
if (!escaped_buf)
return AVERROR(ENOMEM);
bytestream2_init(&gbc, buf, buf_size);
bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
while (bytestream2_get_bytes_left(&gbc)) {
if (bytestream2_get_bytes_left(&gbc) >= 3 &&
bytestream2_peek_be24(&gbc) <= 3) {
bytestream2_put_be24(&pbc, 3);
bytestream2_skip(&gbc, 2);
} else
bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
}
escaped_buf_size = bytestream2_tell_p(&pbc);
AV_WB16(escaped_buf, escaped_buf_size - 2);
ret = decode_nal_units(h, escaped_buf, escaped_buf_size, 1);
av_freep(&escaped_buf);
if (ret < 0)
return ret;
}
return 0;
}
int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
{
AVCodecContext *avctx = h->avctx;
int ret;
if (!buf || size <= 0)
return -1;
if (buf[0] == 1) {
int i, cnt, nalsize;
const unsigned char *p = buf;
h->is_avc = 1;
if (size < 7) {
av_log(avctx, AV_LOG_ERROR,
"avcC %d too short\n", size);
return AVERROR_INVALIDDATA;
}
/* sps and pps in the avcC always have length coded with 2 bytes,
* so put a fake nal_length_size = 2 while parsing them */
h->nal_length_size = 2;
// Decode sps from avcC
cnt = *(p + 5) & 0x1f; // Number of sps
p += 6;
for (i = 0; i < cnt; i++) {
nalsize = AV_RB16(p) + 2;
if(nalsize > size - (p-buf))
return AVERROR_INVALIDDATA;
ret = decode_extradata_ps_mp4(h, p, nalsize);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Decoding sps %d from avcC failed\n", i);
return ret;
}
p += nalsize;
}
// Decode pps from avcC
cnt = *(p++); // Number of pps
for (i = 0; i < cnt; i++) {
nalsize = AV_RB16(p) + 2;
if(nalsize > size - (p-buf))
return AVERROR_INVALIDDATA;
ret = decode_extradata_ps_mp4(h, p, nalsize);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Decoding pps %d from avcC failed\n", i);
return ret;
}
p += nalsize;
}
// Store right nal length size that will be used to parse all other nals
h->nal_length_size = (buf[4] & 0x03) + 1;
} else {
h->is_avc = 0;
ret = decode_nal_units(h, buf, size, 1);
if (ret < 0)
return ret;
}
return size;
}
static int h264_init_context(AVCodecContext *avctx, H264Context *h)
{
int i;
h->avctx = avctx;
h->backup_width = -1;
h->backup_height = -1;
h->backup_pix_fmt = AV_PIX_FMT_NONE;
h->dequant_coeff_pps = -1;
h->current_sps_id = -1;
h->cur_chroma_format_idc = -1;
h->picture_structure = PICT_FRAME;
h->slice_context_count = 1;
h->workaround_bugs = avctx->workaround_bugs;
h->flags = avctx->flags;
h->prev_poc_msb = 1 << 16;
h->x264_build = -1;
h->recovery_frame = -1;
h->frame_recovered = 0;
h->prev_frame_num = -1;
h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
h->next_outputed_poc = INT_MIN;
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;
ff_h264_reset_sei(h);
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
if (!h->slice_ctx) {
h->nb_slice_ctx = 0;
return AVERROR(ENOMEM);
}
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
h->DPB[i].f = av_frame_alloc();
if (!h->DPB[i].f)
return AVERROR(ENOMEM);
}
h->cur_pic.f = av_frame_alloc();
if (!h->cur_pic.f)
return AVERROR(ENOMEM);
h->last_pic_for_ec.f = av_frame_alloc();
if (!h->last_pic_for_ec.f)
return AVERROR(ENOMEM);
for (i = 0; i < h->nb_slice_ctx; i++)
h->slice_ctx[i].h264 = h;
return 0;
}
static AVOnce h264_vlc_init = AV_ONCE_INIT;
av_cold int ff_h264_decode_init(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
int ret;
ret = h264_init_context(avctx, h);
if (ret < 0)
return ret;
/* set defaults */
if (!avctx->has_b_frames)
h->low_delay = 1;
ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
if (ret != 0) {
av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
return AVERROR_UNKNOWN;
}
if (avctx->codec_id == AV_CODEC_ID_H264) {
if (avctx->ticks_per_frame == 1) {
if(h->avctx->time_base.den < INT_MAX/2) {
h->avctx->time_base.den *= 2;
} else
h->avctx->time_base.num /= 2;
}
avctx->ticks_per_frame = 2;
}
if (avctx->extradata_size > 0 && avctx->extradata) {
ret = ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
if (ret < 0) {
h264_decode_end(avctx);
return ret;
}
}
if (h->sps.bitstream_restriction_flag &&
h->avctx->has_b_frames < h->sps.num_reorder_frames) {
h->avctx->has_b_frames = h->sps.num_reorder_frames;
h->low_delay = 0;
}
avctx->internal->allocate_progress = 1;
ff_h264_flush_change(h);
if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
h->enable_er = 0;
if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
av_log(avctx, AV_LOG_WARNING,
"Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
"Use it at your own risk\n");
}
return 0;
}
#if HAVE_THREADS
static int decode_init_thread_copy(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
int ret;
if (!avctx->internal->is_copy)
return 0;
memset(h, 0, sizeof(*h));
ret = h264_init_context(avctx, h);
if (ret < 0)
return ret;
h->context_initialized = 0;
return 0;
}
#endif
/**
* Run setup operations that must be run after slice header decoding.
* This includes finding the next displayed frame.
*
* @param h h264 master context
* @param setup_finished enough NALs have been read that we can call
* ff_thread_finish_setup()
*/
static void decode_postinit(H264Context *h, int setup_finished)
{
H264Picture *out = h->cur_pic_ptr;
H264Picture *cur = h->cur_pic_ptr;
int i, pics, out_of_order, out_idx;
h->cur_pic_ptr->f->pict_type = h->pict_type;
if (h->next_output_pic)
return;
if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
/* FIXME: if we have two PAFF fields in one packet, we can't start
* the next thread here. If we have one field per packet, we can.
* The check in decode_nal_units() is not good enough to find this
* yet, so we assume the worst for now. */
// if (setup_finished)
// ff_thread_finish_setup(h->avctx);
if (cur->field_poc[0] == INT_MAX && cur->field_poc[1] == INT_MAX)
return;
if (h->avctx->hwaccel || h->missing_fields <=1)
return;
}
cur->f->interlaced_frame = 0;
cur->f->repeat_pict = 0;
/* Signal interlacing information externally. */
/* Prioritize picture timing SEI information over used
* decoding process if it exists. */
if (h->sps.pic_struct_present_flag) {
switch (h->sei_pic_struct) {
case SEI_PIC_STRUCT_FRAME:
break;
case SEI_PIC_STRUCT_TOP_FIELD:
case SEI_PIC_STRUCT_BOTTOM_FIELD:
cur->f->interlaced_frame = 1;
break;
case SEI_PIC_STRUCT_TOP_BOTTOM:
case SEI_PIC_STRUCT_BOTTOM_TOP:
if (FIELD_OR_MBAFF_PICTURE(h))
cur->f->interlaced_frame = 1;
else
// try to flag soft telecine progressive
cur->f->interlaced_frame = h->prev_interlaced_frame;
break;
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
/* Signal the possibility of telecined film externally
* (pic_struct 5,6). From these hints, let the applications
* decide if they apply deinterlacing. */
cur->f->repeat_pict = 1;
break;
case SEI_PIC_STRUCT_FRAME_DOUBLING:
cur->f->repeat_pict = 2;
break;
case SEI_PIC_STRUCT_FRAME_TRIPLING:
cur->f->repeat_pict = 4;
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;
} else {
/* Derive interlacing flag from used decoding process. */
cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
}
h->prev_interlaced_frame = cur->f->interlaced_frame;
if (cur->field_poc[0] != cur->field_poc[1]) {
/* Derive top_field_first from field pocs. */
cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
} else {
if (h->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)
cur->f->top_field_first = 1;
else
cur->f->top_field_first = 0;
} else if (cur->f->interlaced_frame) {
/* Default to top field first when pic_struct_present_flag
* is not set but interlaced frame detected */
cur->f->top_field_first = 1;
} else {
/* Most likely progressive */
cur->f->top_field_first = 0;
}
}
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) {
AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
if (stereo) {
switch (h->frame_packing_arrangement_type) {
case 0:
stereo->type = AV_STEREO3D_CHECKERBOARD;
break;
case 1:
stereo->type = AV_STEREO3D_COLUMNS;
break;
case 2:
stereo->type = AV_STEREO3D_LINES;
break;
case 3:
if (h->quincunx_subsampling)
stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
else
stereo->type = AV_STEREO3D_SIDEBYSIDE;
break;
case 4:
stereo->type = AV_STEREO3D_TOPBOTTOM;
break;
case 5:
stereo->type = AV_STEREO3D_FRAMESEQUENCE;
break;
case 6:
stereo->type = AV_STEREO3D_2D;
break;
}
if (h->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);
AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
AV_FRAME_DATA_DISPLAYMATRIX,
sizeof(int32_t) * 9);
if (rotation) {
av_display_rotation_set((int32_t *)rotation->data, angle);
av_display_matrix_flip((int32_t *)rotation->data,
h->sei_hflip, h->sei_vflip);
}
}
if (h->sei_reguserdata_afd_present) {
AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
sizeof(uint8_t));
if (sd) {
*sd->data = h->active_format_description;
h->sei_reguserdata_afd_present = 0;
}
}
if (h->a53_caption) {
AVFrameSideData *sd = av_frame_new_side_data(cur->f,
AV_FRAME_DATA_A53_CC,
h->a53_caption_size);
if (sd)
memcpy(sd->data, h->a53_caption, h->a53_caption_size);
av_freep(&h->a53_caption);
h->a53_caption_size = 0;
h->avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
}
cur->mmco_reset = h->mmco_reset;
h->mmco_reset = 0;
// FIXME do something with unavailable reference frames
/* Sort B-frames into display order */
if (h->sps.bitstream_restriction_flag ||
h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, h->sps.num_reorder_frames);
}
h->low_delay = !h->avctx->has_b_frames;
for (i = 0; 1; i++) {
if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
if(i)
h->last_pocs[i-1] = cur->poc;
break;
} else if(i) {
h->last_pocs[i-1]= h->last_pocs[i];
}
}
out_of_order = MAX_DELAYED_PIC_COUNT - i;
if( cur->f->pict_type == AV_PICTURE_TYPE_B
|| (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
out_of_order = FFMAX(out_of_order, 1);
if (out_of_order == MAX_DELAYED_PIC_COUNT) {
av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;
h->last_pocs[0] = cur->poc;
cur->mmco_reset = 1;
} else if(h->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
av_log(h->avctx, AV_LOG_INFO, "Increasing reorder buffer to %d\n", out_of_order);
h->avctx->has_b_frames = out_of_order;
h->low_delay = 0;
}
pics = 0;
while (h->delayed_pic[pics])
pics++;
av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
h->delayed_pic[pics++] = cur;
if (cur->reference == 0)
cur->reference = DELAYED_PIC_REF;
out = h->delayed_pic[0];
out_idx = 0;
for (i = 1; h->delayed_pic[i] &&
!h->delayed_pic[i]->f->key_frame &&
!h->delayed_pic[i]->mmco_reset;
i++)
if (h->delayed_pic[i]->poc < out->poc) {
out = h->delayed_pic[i];
out_idx = i;
}
if (h->avctx->has_b_frames == 0 &&
(h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset))
h->next_outputed_poc = INT_MIN;
out_of_order = out->poc < h->next_outputed_poc;
if (out_of_order || pics > h->avctx->has_b_frames) {
out->reference &= ~DELAYED_PIC_REF;
// for frame threading, the owner must be the second field's thread or
// else the first thread can release the picture and reuse it unsafely
for (i = out_idx; h->delayed_pic[i]; i++)
h->delayed_pic[i] = h->delayed_pic[i + 1];
}
if (!out_of_order && pics > h->avctx->has_b_frames) {
h->next_output_pic = out;
if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset)) {
h->next_outputed_poc = INT_MIN;
} else
h->next_outputed_poc = out->poc;
} else {
av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
}
if (h->next_output_pic) {
if (h->next_output_pic->recovered) {
// We have reached an recovery point and all frames after it in
// display order are "recovered".
h->frame_recovered |= FRAME_RECOVERED_SEI;
}
h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
}
if (setup_finished && !h->avctx->hwaccel) {
ff_thread_finish_setup(h->avctx);
if (h->avctx->active_thread_type & FF_THREAD_FRAME)
h->setup_finished = 1;
}
}
/**
* instantaneous decoder refresh.
*/
static void idr(H264Context *h)
{
int i;
ff_h264_remove_all_refs(h);
h->prev_frame_num =
h->prev_frame_num_offset = 0;
h->prev_poc_msb = 1<<16;
h->prev_poc_lsb = 0;
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;
}
/* forget old pics after a seek */
void ff_h264_flush_change(H264Context *h)
{
int i, j;
h->next_outputed_poc = INT_MIN;
h->prev_interlaced_frame = 1;
idr(h);
h->prev_frame_num = -1;
if (h->cur_pic_ptr) {
h->cur_pic_ptr->reference = 0;
for (j=i=0; h->delayed_pic[i]; i++)
if (h->delayed_pic[i] != h->cur_pic_ptr)
h->delayed_pic[j++] = h->delayed_pic[i];
h->delayed_pic[j] = NULL;
}
ff_h264_unref_picture(h, &h->last_pic_for_ec);
h->first_field = 0;
ff_h264_reset_sei(h);
h->recovery_frame = -1;
h->frame_recovered = 0;
h->current_slice = 0;
h->mmco_reset = 1;
for (i = 0; i < h->nb_slice_ctx; i++)
h->slice_ctx[i].list_count = 0;
}
/* forget old pics after a seek */
static void flush_dpb(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
int i;
memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
ff_h264_flush_change(h);
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
ff_h264_unref_picture(h, &h->DPB[i]);
h->cur_pic_ptr = NULL;
ff_h264_unref_picture(h, &h->cur_pic);
h->mb_y = 0;
ff_h264_free_tables(h);
h->context_initialized = 0;
}
int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
{
const int max_frame_num = 1 << h->sps.log2_max_frame_num;
int field_poc[2];
h->frame_num_offset = h->prev_frame_num_offset;
if (h->frame_num < h->prev_frame_num)
h->frame_num_offset += max_frame_num;
if (h->sps.poc_type == 0) {
const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
if (h->poc_lsb < h->prev_poc_lsb &&
h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
h->poc_msb = h->prev_poc_msb + max_poc_lsb;
else if (h->poc_lsb > h->prev_poc_lsb &&
h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
h->poc_msb = h->prev_poc_msb - max_poc_lsb;
else
h->poc_msb = h->prev_poc_msb;
field_poc[0] =
field_poc[1] = h->poc_msb + h->poc_lsb;
if (h->picture_structure == PICT_FRAME)
field_poc[1] += h->delta_poc_bottom;
} else if (h->sps.poc_type == 1) {
int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
int i;
if (h->sps.poc_cycle_length != 0)
abs_frame_num = h->frame_num_offset + h->frame_num;
else
abs_frame_num = 0;
if (h->nal_ref_idc == 0 && abs_frame_num > 0)
abs_frame_num--;
expected_delta_per_poc_cycle = 0;
for (i = 0; i < h->sps.poc_cycle_length; i++)
// FIXME integrate during sps parse
expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
if (abs_frame_num > 0) {
int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
for (i = 0; i <= frame_num_in_poc_cycle; i++)
expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
} else
expectedpoc = 0;
if (h->nal_ref_idc == 0)
expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
field_poc[0] = expectedpoc + h->delta_poc[0];
field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
if (h->picture_structure == PICT_FRAME)
field_poc[1] += h->delta_poc[1];
} else {
int poc = 2 * (h->frame_num_offset + h->frame_num);
if (!h->nal_ref_idc)
poc--;
field_poc[0] = poc;
field_poc[1] = poc;
}
if (h->picture_structure != PICT_BOTTOM_FIELD)
pic_field_poc[0] = field_poc[0];
if (h->picture_structure != PICT_TOP_FIELD)
pic_field_poc[1] = field_poc[1];
*pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
return 0;
}
/**
* Compute profile from profile_idc and constraint_set?_flags.
*
* @param sps SPS
*
* @return profile as defined by FF_PROFILE_H264_*
*/
int ff_h264_get_profile(SPS *sps)
{
int profile = sps->profile_idc;
switch (sps->profile_idc) {
case FF_PROFILE_H264_BASELINE:
// constraint_set1_flag set to 1
profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
break;
case FF_PROFILE_H264_HIGH_10:
case FF_PROFILE_H264_HIGH_422:
case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
// constraint_set3_flag set to 1
profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
break;
}
return profile;
}
#if FF_API_CAP_VDPAU
static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
#endif
static int get_last_needed_nal(H264Context *h)
{
int nals_needed = 0;
int first_slice = 0;
int i;
int ret;
for (i = 0; i < h->pkt.nb_nals; i++) {
H2645NAL *nal = &h->pkt.nals[i];
GetBitContext gb;
/* packets can sometimes contain multiple PPS/SPS,
* e.g. two PAFF field pictures in one packet, or a demuxer
* which splits NALs strangely if so, when frame threading we
* can't start the next thread until we've read all of them */
switch (nal->type) {
case NAL_SPS:
case NAL_PPS:
nals_needed = i;
break;
case NAL_DPA:
case NAL_IDR_SLICE:
case NAL_SLICE:
ret = init_get_bits8(&gb, nal->data + 1, (nal->size - 1));
if (ret < 0)
return ret;
if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
!first_slice ||
first_slice != nal->type)
nals_needed = i;
if (!first_slice)
first_slice = nal->type;
}
}
return nals_needed;
}
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
int parse_extradata)
{
AVCodecContext *const avctx = h->avctx;
unsigned context_count = 0;
int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
int idr_cleared=0;
int i, ret = 0;
h->nal_unit_type= 0;
if(!h->slice_context_count)
h->slice_context_count= 1;
h->max_contexts = h->slice_context_count;
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
h->current_slice = 0;
if (!h->first_field)
h->cur_pic_ptr = NULL;
ff_h264_reset_sei(h);
}
if (h->nal_length_size == 4) {
if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
h->is_avc = 0;
}else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
h->is_avc = 1;
}
ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
h->nal_length_size, avctx->codec_id);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR,
"Error splitting the input into NAL units.\n");
/* don't consider NAL parsing failure a fatal error when parsing extradata, as the stream may work without it */
return parse_extradata ? buf_size : ret;
}
if (avctx->active_thread_type & FF_THREAD_FRAME)
nals_needed = get_last_needed_nal(h);
if (nals_needed < 0)
return nals_needed;
for (i = 0; i < h->pkt.nb_nals; i++) {
H2645NAL *nal = &h->pkt.nals[i];
H264SliceContext *sl = &h->slice_ctx[context_count];
int err;
if (avctx->skip_frame >= AVDISCARD_NONREF &&
nal->ref_idc == 0 && nal->type != NAL_SEI)
continue;
again:
/* Ignore per frame NAL unit type during extradata
* parsing. Decoding slices is not possible in codec init
* with frame-mt */
if (parse_extradata) {
switch (nal->type) {
case NAL_IDR_SLICE:
case NAL_SLICE:
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
av_log(h->avctx, AV_LOG_WARNING,
"Ignoring NAL %d in global header/extradata\n",
nal->type);
// fall through to next case
case NAL_AUXILIARY_SLICE:
nal->type = NAL_FF_IGNORE;
}
}
// FIXME these should stop being context-global variables
h->nal_ref_idc = nal->ref_idc;
h->nal_unit_type = nal->type;
err = 0;
switch (nal->type) {
case NAL_IDR_SLICE:
if ((nal->data[1] & 0xFC) == 0x98) {
av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
h->next_outputed_poc = INT_MIN;
ret = -1;
goto end;
}
if (nal->type != NAL_IDR_SLICE) {
av_log(h->avctx, AV_LOG_ERROR,
"Invalid mix of idr and non-idr slices\n");
ret = -1;
goto end;
}
if(!idr_cleared) {
if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
ret = AVERROR_INVALIDDATA;
goto end;
}
idr(h); // FIXME ensure we don't lose some frames if there is reordering
}
idr_cleared = 1;
h->has_recovery_point = 1;
case NAL_SLICE:
sl->gb = nal->gb;
if ( nals_needed >= i
|| (!(avctx->active_thread_type & FF_THREAD_FRAME) && !context_count))
h->au_pps_id = -1;
if ((err = ff_h264_decode_slice_header(h, sl)))
break;
if (h->sei_recovery_frame_cnt >= 0) {
if (h->frame_num != h->sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
h->valid_recovery_point = 1;
if ( h->recovery_frame < 0
|| av_mod_uintp2(h->recovery_frame - h->frame_num, h->sps.log2_max_frame_num) > h->sei_recovery_frame_cnt) {
h->recovery_frame = av_mod_uintp2(h->frame_num + h->sei_recovery_frame_cnt, h->sps.log2_max_frame_num);
if (!h->valid_recovery_point)
h->recovery_frame = h->frame_num;
}
}
h->cur_pic_ptr->f->key_frame |= (nal->type == NAL_IDR_SLICE);
if (nal->type == NAL_IDR_SLICE ||
(h->recovery_frame == h->frame_num && nal->ref_idc)) {
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 (nal->type == NAL_IDR_SLICE)
h->frame_recovered |= FRAME_RECOVERED_IDR;
#if 1
h->cur_pic_ptr->recovered |= h->frame_recovered;
#else
h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
#endif
if (h->current_slice == 1) {
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
decode_postinit(h, i >= nals_needed);
if (h->avctx->hwaccel &&
(ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
goto end;
#if FF_API_CAP_VDPAU
if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
ff_vdpau_h264_picture_start(h);
#endif
}
if (sl->redundant_pic_count == 0) {
if (avctx->hwaccel) {
ret = avctx->hwaccel->decode_slice(avctx,
nal->raw_data,
nal->raw_size);
if (ret < 0)
goto end;
#if FF_API_CAP_VDPAU
} else if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU) {
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
start_code,
sizeof(start_code));
ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
nal->raw_data,
nal->raw_size);
#endif
} else
context_count++;
}
break;
case NAL_DPA:
case NAL_DPB:
case NAL_DPC:
avpriv_request_sample(avctx, "data partitioning");
break;
case NAL_SEI:
h->gb = nal->gb;
ret = ff_h264_decode_sei(h);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;
case NAL_SPS:
h->gb = nal->gb;
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
av_log(h->avctx, AV_LOG_DEBUG,
"SPS decoding failure, trying again with the complete NAL\n");
init_get_bits8(&h->gb, nal->raw_data + 1, nal->raw_size - 1);
if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
break;
h->gb = nal->gb;
ff_h264_decode_seq_parameter_set(h, 1);
break;
case NAL_PPS:
h->gb = nal->gb;
ret = ff_h264_decode_picture_parameter_set(h, nal->size_bits);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
break;
case NAL_AUD:
case NAL_END_SEQUENCE:
case NAL_END_STREAM:
case NAL_FILLER_DATA:
case NAL_SPS_EXT:
case NAL_AUXILIARY_SLICE:
break;
case NAL_FF_IGNORE:
break;
default:
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
nal->type, nal->size_bits);
}
if (context_count == h->max_contexts) {
ret = ff_h264_execute_decode_slices(h, context_count);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
context_count = 0;
}
if (err < 0 || err == SLICE_SKIPED) {
if (err < 0)
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 == SLICE_SINGLETHREAD) {
if (context_count > 1) {
ret = ff_h264_execute_decode_slices(h, context_count - 1);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
context_count = 0;
}
/* 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. */
sl = &h->slice_ctx[0];
goto again;
}
}
if (context_count) {
ret = ff_h264_execute_decode_slices(h, context_count);
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
goto end;
}
ret = 0;
end:
#if CONFIG_ERROR_RESILIENCE
/*
* FIXME: Error handling code does not seem to support interlaced
* when slices span multiple rows
* The ff_er_add_slice calls don't work right for bottom
* fields; they cause massive erroneous error concealing
* Error marking covers both fields (top and bottom).
* This causes a mismatched s->error_count
* and a bad error table. Further, the error count goes to
* INT_MAX when called for bottom field, because mb_y is
* past end by one (callers fault) and resync_mb_y != 0
* causes problems for the first MB line, too.
*/
if (!FIELD_PICTURE(h) && h->current_slice && !h->sps.new && h->enable_er) {
H264SliceContext *sl = h->slice_ctx;
int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
if (use_last_pic) {
ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
sl->ref_list[0][0].parent = &h->last_pic_for_ec;
memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
} else if (sl->ref_count[0]) {
ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
} else
ff_h264_set_erpic(&sl->er.last_pic, NULL);
if (sl->ref_count[1])
ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
sl->er.ref_count = sl->ref_count[0];
ff_er_frame_end(&sl->er);
if (use_last_pic)
memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
}
#endif /* CONFIG_ERROR_RESILIENCE */
/* clean up */
if (h->cur_pic_ptr && !h->droppable) {
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
h->picture_structure == PICT_BOTTOM_FIELD);
}
return (ret < 0) ? ret : buf_size;
}
/**
* Return the number of bytes consumed for building the current frame.
*/
static int get_consumed_bytes(int pos, int buf_size)
{
if (pos == 0)
pos = 1; // avoid infinite loops (I doubt that is needed but...)
if (pos + 10 > buf_size)
pos = buf_size; // oops ;)
return pos;
}
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
{
AVFrame *src = srcp->f;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
int i;
int ret = av_frame_ref(dst, src);
if (ret < 0)
return ret;
av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
h->backup_width = h->avctx->width;
h->backup_height = h->avctx->height;
h->backup_pix_fmt = h->avctx->pix_fmt;
h->avctx->width = dst->width;
h->avctx->height = dst->height;
h->avctx->pix_fmt = dst->format;
if (srcp->sei_recovery_frame_cnt == 0)
dst->key_frame = 1;
if (!srcp->crop)
return 0;
for (i = 0; i < desc->nb_components; i++) {
int hshift = (i > 0) ? desc->log2_chroma_w : 0;
int vshift = (i > 0) ? desc->log2_chroma_h : 0;
int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
(srcp->crop_top >> vshift) * dst->linesize[i];
dst->data[i] += off;
}
return 0;
}
static int is_extra(const uint8_t *buf, int buf_size)
{
int cnt= buf[5]&0x1f;
const uint8_t *p= buf+6;
while(cnt--){
int nalsize= AV_RB16(p) + 2;
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
return 0;
p += nalsize;
}
cnt = *(p++);
if(!cnt)
return 0;
while(cnt--){
int nalsize= AV_RB16(p) + 2;
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
return 0;
p += nalsize;
}
return 1;
}
static int h264_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
H264Context *h = avctx->priv_data;
AVFrame *pict = data;
int buf_index = 0;
H264Picture *out;
int i, out_idx;
int ret;
h->flags = avctx->flags;
h->setup_finished = 0;
if (h->backup_width != -1) {
avctx->width = h->backup_width;
h->backup_width = -1;
}
if (h->backup_height != -1) {
avctx->height = h->backup_height;
h->backup_height = -1;
}
if (h->backup_pix_fmt != AV_PIX_FMT_NONE) {
avctx->pix_fmt = h->backup_pix_fmt;
h->backup_pix_fmt = AV_PIX_FMT_NONE;
}
ff_h264_unref_picture(h, &h->last_pic_for_ec);
/* end of stream, output what is still in the buffers */
if (buf_size == 0) {
out:
h->cur_pic_ptr = NULL;
h->first_field = 0;
// FIXME factorize this with the output code below
out = h->delayed_pic[0];
out_idx = 0;
for (i = 1;
h->delayed_pic[i] &&
!h->delayed_pic[i]->f->key_frame &&
!h->delayed_pic[i]->mmco_reset;
i++)
if (h->delayed_pic[i]->poc < out->poc) {
out = h->delayed_pic[i];
out_idx = i;
}
for (i = out_idx; h->delayed_pic[i]; i++)
h->delayed_pic[i] = h->delayed_pic[i + 1];
if (out) {
out->reference &= ~DELAYED_PIC_REF;
ret = output_frame(h, pict, out);
if (ret < 0)
return ret;
*got_frame = 1;
}
return buf_index;
}
if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
int side_size;
uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
if (is_extra(side, side_size))
ff_h264_decode_extradata(h, side, side_size);
}
if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
if (is_extra(buf, buf_size))
return ff_h264_decode_extradata(h, buf, buf_size);
}
buf_index = decode_nal_units(h, buf, buf_size, 0);
if (buf_index < 0)
return AVERROR_INVALIDDATA;
if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
av_assert0(buf_index <= buf_size);
goto out;
}
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
if (avctx->skip_frame >= AVDISCARD_NONREF ||
buf_size >= 4 && !memcmp("Q264", buf, 4))
return buf_size;
av_log(avctx, AV_LOG_ERROR, "no frame!\n");
return AVERROR_INVALIDDATA;
}
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
(h->mb_y >= h->mb_height && h->mb_height)) {
if (avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)
decode_postinit(h, 1);
if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
return ret;
/* Wait for second field. */
*got_frame = 0;
if (h->next_output_pic && ((avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
(avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
h->next_output_pic->recovered)) {
if (!h->next_output_pic->recovered)
h->next_output_pic->f->flags |= AV_FRAME_FLAG_CORRUPT;
if (!h->avctx->hwaccel &&
(h->next_output_pic->field_poc[0] == INT_MAX ||
h->next_output_pic->field_poc[1] == INT_MAX)
) {
int p;
AVFrame *f = h->next_output_pic->f;
int field = h->next_output_pic->field_poc[0] == INT_MAX;
uint8_t *dst_data[4];
int linesizes[4];
const uint8_t *src_data[4];
av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
for (p = 0; p<4; p++) {
dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
src_data[p] = f->data[p] + field *f->linesize[p];
linesizes[p] = 2*f->linesize[p];
}
av_image_copy(dst_data, linesizes, src_data, linesizes,
f->format, f->width, f->height>>1);
}
ret = output_frame(h, pict, h->next_output_pic);
if (ret < 0)
return ret;
*got_frame = 1;
if (CONFIG_MPEGVIDEO) {
ff_print_debug_info2(h->avctx, pict, NULL,
h->next_output_pic->mb_type,
h->next_output_pic->qscale_table,
h->next_output_pic->motion_val,
&h->low_delay,
h->mb_width, h->mb_height, h->mb_stride, 1);
}
}
}
av_assert0(pict->buf[0] || !*got_frame);
ff_h264_unref_picture(h, &h->last_pic_for_ec);
return get_consumed_bytes(buf_index, buf_size);
}
av_cold void ff_h264_free_context(H264Context *h)
{
int i;
ff_h264_free_tables(h);
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
ff_h264_unref_picture(h, &h->DPB[i]);
av_frame_free(&h->DPB[i].f);
}
memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
h->cur_pic_ptr = NULL;
for (i = 0; i < h->nb_slice_ctx; i++)
av_freep(&h->slice_ctx[i].rbsp_buffer);
av_freep(&h->slice_ctx);
h->nb_slice_ctx = 0;
h->a53_caption_size = 0;
av_freep(&h->a53_caption);
for (i = 0; i < MAX_SPS_COUNT; i++)
av_freep(h->sps_buffers + i);
for (i = 0; i < MAX_PPS_COUNT; i++)
av_freep(h->pps_buffers + i);
ff_h2645_packet_uninit(&h->pkt);
}
static av_cold int h264_decode_end(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
ff_h264_remove_all_refs(h);
ff_h264_free_context(h);
ff_h264_unref_picture(h, &h->cur_pic);
av_frame_free(&h->cur_pic.f);
ff_h264_unref_picture(h, &h->last_pic_for_ec);
av_frame_free(&h->last_pic_for_ec.f);
return 0;
}
#define OFFSET(x) offsetof(H264Context, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption h264_options[] = {
{"is_avc", "is avc", offsetof(H264Context, is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0},
{"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
{ "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
{ NULL },
};
static const AVClass h264_class = {
.class_name = "H264 Decoder",
.item_name = av_default_item_name,
.option = h264_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_h264_decoder = {
.name = "h264",
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(H264Context),
.init = ff_h264_decode_init,
.close = h264_decode_end,
.decode = h264_decode_frame,
.capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
AV_CODEC_CAP_FRAME_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.flush = flush_dpb,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
.priv_class = &h264_class,
};
#if CONFIG_H264_VDPAU_DECODER && FF_API_VDPAU
static const AVClass h264_vdpau_class = {
.class_name = "H264 VDPAU Decoder",
.item_name = av_default_item_name,
.option = h264_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_h264_vdpau_decoder = {
.name = "h264_vdpau",
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(H264Context),
.init = ff_h264_decode_init,
.close = h264_decode_end,
.decode = h264_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
.flush = flush_dpb,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
AV_PIX_FMT_NONE},
.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
.priv_class = &h264_vdpau_class,
};
#endif
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