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synced 2024-12-24 16:22:37 +00:00
h264: switch to h2645_parse for NAL parsing
This commit is contained in:
parent
a7829a2a3f
commit
ca2f19b9cc
@ -252,7 +252,8 @@ OBJS-$(CONFIG_H264_DECODER) += h264.o h264_cabac.o h264_cavlc.o \
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h264_direct.o h264_loopfilter.o \
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h264_mb.o h264_picture.o h264_ps.o \
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h264_refs.o h264_sei.o \
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h264_slice.o h264data.o h264_parse.o
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h264_slice.o h264data.o h264_parse.o \
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h2645_parse.o
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OBJS-$(CONFIG_H264_MMAL_DECODER) += mmaldec.o
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OBJS-$(CONFIG_H264_NVENC_ENCODER) += nvenc_h264.o
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OBJS-$(CONFIG_H264_QSV_DECODER) += qsvdec_h2645.o
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@ -38,6 +38,7 @@
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#include "error_resilience.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h2645_parse.h"
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#include "h264data.h"
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#include "h264chroma.h"
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#include "h264_mvpred.h"
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@ -221,25 +222,6 @@ nsc:
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return dst;
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}
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/**
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* Identify the exact end of the bitstream
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* @return the length of the trailing, or 0 if damaged
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*/
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static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
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{
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int v = *src;
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int r;
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ff_tlog(h->avctx, "rbsp trailing %X\n", v);
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for (r = 1; r < 9; r++) {
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if (v & 1)
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return r;
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v >>= 1;
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}
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return 0;
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}
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void ff_h264_free_tables(H264Context *h)
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{
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int i;
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@ -1143,113 +1125,30 @@ int ff_set_ref_count(H264Context *h, H264SliceContext *sl)
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return 0;
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}
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static int find_start_code(const uint8_t *buf, int buf_size,
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int buf_index, int next_avc)
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static int get_last_needed_nal(H264Context *h)
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{
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// start code prefix search
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for (; buf_index + 3 < next_avc; buf_index++)
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// This should always succeed in the first iteration.
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if (buf[buf_index] == 0 &&
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buf[buf_index + 1] == 0 &&
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buf[buf_index + 2] == 1)
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break;
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if (buf_index + 3 >= buf_size)
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return buf_size;
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return buf_index + 3;
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}
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static int get_avc_nalsize(H264Context *h, const uint8_t *buf,
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int buf_size, int *buf_index)
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{
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int i, nalsize = 0;
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if (*buf_index >= buf_size - h->nal_length_size) {
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// the end of the buffer is reached, refill it.
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return AVERROR(EAGAIN);
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}
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for (i = 0; i < h->nal_length_size; i++)
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nalsize = (nalsize << 8) | buf[(*buf_index)++];
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if (nalsize <= 0 || nalsize > buf_size - *buf_index) {
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av_log(h->avctx, AV_LOG_ERROR,
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"AVC: nal size %d\n", nalsize);
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return AVERROR_INVALIDDATA;
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}
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return nalsize;
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}
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static int get_bit_length(H264Context *h, const uint8_t *buf,
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const uint8_t *ptr, int dst_length,
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int i, int next_avc)
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{
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if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
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buf[i] == 0x00 && buf[i + 1] == 0x00 &&
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buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
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h->workaround_bugs |= FF_BUG_TRUNCATED;
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if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
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while (dst_length > 0 && ptr[dst_length - 1] == 0)
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dst_length--;
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if (!dst_length)
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return 0;
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return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
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}
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static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
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{
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int next_avc = h->is_avc ? 0 : buf_size;
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int nal_index = 0;
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int buf_index = 0;
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int nals_needed = 0;
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int i;
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while(1) {
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for (i = 0; i < h->pkt.nb_nals; i++) {
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H2645NAL *nal = &h->pkt.nals[i];
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GetBitContext gb;
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int nalsize = 0;
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int dst_length, bit_length, consumed;
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const uint8_t *ptr;
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if (buf_index >= next_avc) {
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nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
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if (nalsize < 0)
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break;
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next_avc = buf_index + nalsize;
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} else {
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buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
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if (buf_index >= buf_size)
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break;
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}
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ptr = ff_h264_decode_nal(h, &h->slice_ctx[0], buf + buf_index, &dst_length, &consumed,
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next_avc - buf_index);
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if (!ptr || dst_length < 0)
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return AVERROR_INVALIDDATA;
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buf_index += consumed;
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bit_length = get_bit_length(h, buf, ptr, dst_length,
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buf_index, next_avc);
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nal_index++;
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/* packets can sometimes contain multiple PPS/SPS,
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* e.g. two PAFF field pictures in one packet, or a demuxer
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* which splits NALs strangely if so, when frame threading we
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* can't start the next thread until we've read all of them */
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switch (h->nal_unit_type) {
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switch (nal->type) {
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case NAL_SPS:
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case NAL_PPS:
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nals_needed = nal_index;
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nals_needed = i;
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break;
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case NAL_DPA:
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case NAL_IDR_SLICE:
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case NAL_SLICE:
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init_get_bits(&gb, ptr, bit_length);
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init_get_bits(&gb, nal->data + 1, (nal->size - 1) * 8);
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if (!get_ue_golomb(&gb))
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nals_needed = nal_index;
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nals_needed = i;
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}
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}
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@ -1260,13 +1159,9 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
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int parse_extradata)
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{
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AVCodecContext *const avctx = h->avctx;
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H264SliceContext *sl;
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int buf_index;
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unsigned context_count;
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int next_avc;
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unsigned context_count = 0;
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int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
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int nal_index;
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int ret = 0;
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int i, ret = 0;
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h->max_contexts = h->slice_context_count;
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if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
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@ -1276,199 +1171,157 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
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ff_h264_reset_sei(h);
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}
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ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
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h->nal_length_size, avctx->codec_id);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"Error splitting the input into NAL units.\n");
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return ret;
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}
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if (avctx->active_thread_type & FF_THREAD_FRAME)
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nals_needed = get_last_needed_nal(h, buf, buf_size);
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nals_needed = get_last_needed_nal(h);
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{
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buf_index = 0;
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context_count = 0;
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next_avc = h->is_avc ? 0 : buf_size;
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nal_index = 0;
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for (;;) {
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int consumed;
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int dst_length;
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int bit_length;
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const uint8_t *ptr;
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int nalsize = 0;
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int err;
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for (i = 0; i < h->pkt.nb_nals; i++) {
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H2645NAL *nal = &h->pkt.nals[i];
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H264SliceContext *sl = &h->slice_ctx[context_count];
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int err;
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if (buf_index >= next_avc) {
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nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
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if (nalsize < 0)
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break;
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next_avc = buf_index + nalsize;
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} else {
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buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
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if (buf_index >= buf_size)
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break;
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if (buf_index >= next_avc)
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continue;
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}
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if (avctx->skip_frame >= AVDISCARD_NONREF &&
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nal->ref_idc == 0 && nal->type != NAL_SEI)
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continue;
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sl = &h->slice_ctx[context_count];
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again:
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/* Ignore every NAL unit type except PPS and SPS during extradata
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* parsing. Decoding slices is not possible in codec init
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* with frame-mt */
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if (parse_extradata && HAVE_THREADS &&
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(h->avctx->active_thread_type & FF_THREAD_FRAME) &&
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(nal->type != NAL_PPS && nal->type != NAL_SPS)) {
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if (nal->type < NAL_AUD || nal->type > NAL_AUXILIARY_SLICE)
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av_log(avctx, AV_LOG_INFO,
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"Ignoring NAL unit %d during extradata parsing\n",
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nal->type);
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nal->type = NAL_FF_IGNORE;
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}
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ptr = ff_h264_decode_nal(h, sl, buf + buf_index, &dst_length,
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&consumed, next_avc - buf_index);
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if (!ptr || dst_length < 0) {
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// FIXME these should stop being context-global variables
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h->nal_ref_idc = nal->ref_idc;
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h->nal_unit_type = nal->type;
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err = 0;
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switch (nal->type) {
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case NAL_IDR_SLICE:
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if (nal->type != NAL_IDR_SLICE) {
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av_log(h->avctx, AV_LOG_ERROR,
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"Invalid mix of idr and non-idr slices\n");
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ret = -1;
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goto end;
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}
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idr(h); // FIXME ensure we don't lose some frames if there is reordering
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case NAL_SLICE:
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sl->gb = nal->gb;
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bit_length = get_bit_length(h, buf, ptr, dst_length,
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buf_index + consumed, next_avc);
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if ((err = ff_h264_decode_slice_header(h, sl)))
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break;
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if (h->avctx->debug & FF_DEBUG_STARTCODE)
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av_log(h->avctx, AV_LOG_DEBUG,
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"NAL %d at %d/%d length %d\n",
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h->nal_unit_type, buf_index, buf_size, dst_length);
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if (h->is_avc && (nalsize != consumed) && nalsize)
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av_log(h->avctx, AV_LOG_DEBUG,
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"AVC: Consumed only %d bytes instead of %d\n",
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consumed, nalsize);
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buf_index += consumed;
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nal_index++;
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if (avctx->skip_frame >= AVDISCARD_NONREF &&
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h->nal_ref_idc == 0 &&
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h->nal_unit_type != NAL_SEI)
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continue;
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again:
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/* Ignore every NAL unit type except PPS and SPS during extradata
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* parsing. Decoding slices is not possible in codec init
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* with frame-mt */
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if (parse_extradata && HAVE_THREADS &&
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(h->avctx->active_thread_type & FF_THREAD_FRAME) &&
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(h->nal_unit_type != NAL_PPS &&
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h->nal_unit_type != NAL_SPS)) {
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if (h->nal_unit_type < NAL_AUD ||
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h->nal_unit_type > NAL_AUXILIARY_SLICE)
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av_log(avctx, AV_LOG_INFO,
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"Ignoring NAL unit %d during extradata parsing\n",
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h->nal_unit_type);
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h->nal_unit_type = NAL_FF_IGNORE;
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if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
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h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
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((1 << h->sps.log2_max_frame_num) - 1);
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}
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err = 0;
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switch (h->nal_unit_type) {
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case NAL_IDR_SLICE:
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if (h->nal_unit_type != NAL_IDR_SLICE) {
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av_log(h->avctx, AV_LOG_ERROR,
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"Invalid mix of idr and non-idr slices\n");
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ret = -1;
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goto end;
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}
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idr(h); // FIXME ensure we don't lose some frames if there is reordering
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case NAL_SLICE:
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init_get_bits(&sl->gb, ptr, bit_length);
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if ((err = ff_h264_decode_slice_header(h, sl)))
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break;
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h->cur_pic_ptr->f->key_frame |=
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(nal->type == NAL_IDR_SLICE) || (h->sei_recovery_frame_cnt >= 0);
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if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
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h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
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((1 << h->sps.log2_max_frame_num) - 1);
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}
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if (nal->type == NAL_IDR_SLICE || h->recovery_frame == h->frame_num) {
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h->recovery_frame = -1;
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h->cur_pic_ptr->recovered = 1;
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}
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// If we have an IDR, all frames after it in decoded order are
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// "recovered".
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if (nal->type == NAL_IDR_SLICE)
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h->frame_recovered |= FRAME_RECOVERED_IDR;
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h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
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h->cur_pic_ptr->f->key_frame |=
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(h->nal_unit_type == NAL_IDR_SLICE) ||
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(h->sei_recovery_frame_cnt >= 0);
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if (h->current_slice == 1) {
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if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
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decode_postinit(h, i >= nals_needed);
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if (h->nal_unit_type == NAL_IDR_SLICE ||
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h->recovery_frame == h->frame_num) {
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h->recovery_frame = -1;
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h->cur_pic_ptr->recovered = 1;
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}
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// If we have an IDR, all frames after it in decoded order are
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// "recovered".
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if (h->nal_unit_type == NAL_IDR_SLICE)
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h->frame_recovered |= FRAME_RECOVERED_IDR;
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h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
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if (h->avctx->hwaccel &&
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(ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
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return ret;
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}
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if (h->current_slice == 1) {
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if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
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decode_postinit(h, nal_index >= nals_needed);
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if (h->avctx->hwaccel &&
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(ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
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if (sl->redundant_pic_count == 0 &&
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(avctx->skip_frame < AVDISCARD_NONREF || nal->ref_idc) &&
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(avctx->skip_frame < AVDISCARD_BIDIR ||
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sl->slice_type_nos != AV_PICTURE_TYPE_B) &&
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(avctx->skip_frame < AVDISCARD_NONKEY ||
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h->cur_pic_ptr->f->key_frame) &&
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avctx->skip_frame < AVDISCARD_ALL) {
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if (avctx->hwaccel) {
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ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
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if (ret < 0)
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return ret;
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}
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if (sl->redundant_pic_count == 0 &&
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(avctx->skip_frame < AVDISCARD_NONREF ||
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h->nal_ref_idc) &&
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(avctx->skip_frame < AVDISCARD_BIDIR ||
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sl->slice_type_nos != AV_PICTURE_TYPE_B) &&
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(avctx->skip_frame < AVDISCARD_NONKEY ||
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h->cur_pic_ptr->f->key_frame) &&
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avctx->skip_frame < AVDISCARD_ALL) {
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if (avctx->hwaccel) {
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ret = avctx->hwaccel->decode_slice(avctx,
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&buf[buf_index - consumed],
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consumed);
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if (ret < 0)
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return ret;
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} else
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context_count++;
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}
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break;
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case NAL_DPA:
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case NAL_DPB:
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case NAL_DPC:
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avpriv_request_sample(avctx, "data partitioning");
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ret = AVERROR(ENOSYS);
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} else
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context_count++;
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}
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break;
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case NAL_DPA:
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case NAL_DPB:
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case NAL_DPC:
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avpriv_request_sample(avctx, "data partitioning");
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ret = AVERROR(ENOSYS);
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goto end;
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break;
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case NAL_SEI:
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h->gb = nal->gb;
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ret = ff_h264_decode_sei(h);
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if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
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goto end;
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break;
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case NAL_SEI:
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init_get_bits(&h->gb, ptr, bit_length);
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ret = ff_h264_decode_sei(h);
|
||||
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
||||
goto end;
|
||||
break;
|
||||
case NAL_SPS:
|
||||
init_get_bits(&h->gb, ptr, bit_length);
|
||||
ret = ff_h264_decode_seq_parameter_set(h);
|
||||
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
||||
goto end;
|
||||
break;
|
||||
case NAL_PPS:
|
||||
init_get_bits(&h->gb, ptr, bit_length);
|
||||
ret = ff_h264_decode_picture_parameter_set(h, bit_length);
|
||||
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",
|
||||
h->nal_unit_type, bit_length);
|
||||
}
|
||||
break;
|
||||
case NAL_SPS:
|
||||
h->gb = nal->gb;
|
||||
ret = ff_h264_decode_seq_parameter_set(h);
|
||||
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
||||
goto end;
|
||||
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 (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) {
|
||||
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, 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 (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 == 1) {
|
||||
/* 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) {
|
||||
@ -1485,7 +1338,7 @@ end:
|
||||
h->picture_structure == PICT_BOTTOM_FIELD);
|
||||
}
|
||||
|
||||
return (ret < 0) ? ret : buf_index;
|
||||
return (ret < 0) ? ret : buf_size;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1632,6 +1485,8 @@ av_cold void ff_h264_free_context(H264Context *h)
|
||||
|
||||
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)
|
||||
|
@ -34,6 +34,7 @@
|
||||
#include "error_resilience.h"
|
||||
#include "get_bits.h"
|
||||
#include "h264_parse.h"
|
||||
#include "h2645_parse.h"
|
||||
#include "h264chroma.h"
|
||||
#include "h264dsp.h"
|
||||
#include "h264pred.h"
|
||||
@ -471,6 +472,8 @@ typedef struct H264Context {
|
||||
H264SliceContext *slice_ctx;
|
||||
int nb_slice_ctx;
|
||||
|
||||
H2645Packet pkt;
|
||||
|
||||
int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
|
||||
|
||||
/* coded dimensions -- 16 * mb w/h */
|
||||
|
Loading…
Reference in New Issue
Block a user