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h264: move parser-only variables to their own context

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This commit is contained in:
Anton Khirnov 2015-01-17 17:30:46 +01:00
parent cf1e0786ed
commit 9404a47a2d
3 changed files with 26 additions and 23 deletions
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7
libavcodec/h264.c
View File

@ -1084,13 +1084,6 @@ static void flush_dpb(AVCodecContext *avctx)
h->mb_x = h->mb_y = 0;
h->parse_context.state = -1;
h->parse_context.frame_start_found = 0;
h->parse_context.overread = 0;
h->parse_context.overread_index = 0;
h->parse_context.index = 0;
h->parse_context.last_index = 0;
ff_h264_free_tables(h, 1);
h->context_initialized = 0;
}

2
libavcodec/h264.h
View File

@ -305,7 +305,6 @@ typedef struct H264Context {
H264DSPContext h264dsp;
H264ChromaContext h264chroma;
H264QpelContext h264qpel;
ParseContext parse_context;
GetBitContext gb;
ERContext er;
@ -522,7 +521,6 @@ typedef struct H264Context {
*/
int is_avc; ///< this flag is != 0 if codec is avc1
int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
int got_first; ///< this flag is != 0 if we've parsed a frame
int bit_depth_luma; ///< luma bit depth from sps to detect changes
int chroma_format_idc; ///< chroma format from sps to detect changes

40
libavcodec/h264_parser.c
View File

@ -34,13 +34,20 @@
#include <assert.h>
typedef struct H264ParseContext {
H264Context h;
ParseContext pc;
int got_first;
} H264ParseContext;
static int h264_find_frame_end(H264Context *h, const uint8_t *buf,
static int h264_find_frame_end(H264ParseContext *p, const uint8_t *buf,
int buf_size)
{
H264Context *h = &p->h;
int i;
uint32_t state;
ParseContext *pc = &h->parse_context;
ParseContext *pc = &p->pc;
// mb_addr= pc->mb_addr - 1;
state = pc->state;
if (state > 13)
@ -92,7 +99,8 @@ found:
static int scan_mmco_reset(AVCodecParserContext *s)
{
H264Context *h = s->priv_data;
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
h->slice_type_nos = s->pict_type & 3;
@ -172,7 +180,8 @@ static inline int parse_nal_units(AVCodecParserContext *s,
AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
H264Context *h = s->priv_data;
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
const uint8_t *buf_end = buf + buf_size;
unsigned int pps_id;
unsigned int slice_type;
@ -401,12 +410,13 @@ static int h264_parse(AVCodecParserContext *s,
const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
H264Context *h = s->priv_data;
ParseContext *pc = &h->parse_context;
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
ParseContext *pc = &p->pc;
int next;
if (!h->got_first) {
h->got_first = 1;
if (!p->got_first) {
p->got_first = 1;
if (avctx->extradata_size) {
h->avctx = avctx;
// must be done like in the decoder.
@ -423,7 +433,7 @@ static int h264_parse(AVCodecParserContext *s,
if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
next = buf_size;
} else {
next = h264_find_frame_end(h, buf, buf_size);
next = h264_find_frame_end(p, buf, buf_size);
if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
@ -433,7 +443,7 @@ static int h264_parse(AVCodecParserContext *s,
if (next < 0 && next != END_NOT_FOUND) {
assert(pc->last_index + next >= 0);
h264_find_frame_end(h, &pc->buffer[pc->last_index + next], -next); // update state
h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next); // update state
}
}
@ -491,8 +501,9 @@ static int h264_split(AVCodecContext *avctx,
static void close(AVCodecParserContext *s)
{
H264Context *h = s->priv_data;
ParseContext *pc = &h->parse_context;
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
ParseContext *pc = &p->pc;
av_free(pc->buffer);
ff_h264_free_context(h);
@ -500,7 +511,8 @@ static void close(AVCodecParserContext *s)
static av_cold int init(AVCodecParserContext *s)
{
H264Context *h = s->priv_data;
H264ParseContext *p = s->priv_data;
H264Context *h = &p->h;
h->thread_context[0] = h;
h->slice_context_count = 1;
ff_h264dsp_init(&h->h264dsp, 8, 1);
@ -509,7 +521,7 @@ static av_cold int init(AVCodecParserContext *s)
AVCodecParser ff_h264_parser = {
.codec_ids = { AV_CODEC_ID_H264 },
.priv_data_size = sizeof(H264Context),
.priv_data_size = sizeof(H264ParseContext),
.parser_init = init,
.parser_parse = h264_parse,
.parser_close = close,