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https://git.ffmpeg.org/ffmpeg.git
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h264_parser: K&R formatting cosmetics
This commit is contained in:
Luca Barbato
parent
92b3caa108
commit
f8a4d5e970
@ -34,68 +34,78 @@
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#include <assert.h>
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static int h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size)
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static int h264_find_frame_end(H264Context *h, const uint8_t *buf,
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int buf_size)
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{
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int i;
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uint32_t state;
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ParseContext *pc = &h->parse_context;
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// mb_addr= pc->mb_addr - 1;
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state= pc->state;
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if(state>13)
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state= 7;
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state = pc->state;
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if (state > 13)
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state = 7;
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for(i=0; i<buf_size; i++){
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if(state==7){
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for (i = 0; i < buf_size; i++) {
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if (state == 7) {
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#if HAVE_FAST_UNALIGNED
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/* we check i<buf_size instead of i+3/7 because its simpler
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* and there should be FF_INPUT_BUFFER_PADDING_SIZE bytes at the end
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*/
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# if HAVE_FAST_64BIT
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while(i<buf_size && !((~*(const uint64_t*)(buf+i) & (*(const uint64_t*)(buf+i) - 0x0101010101010101ULL)) & 0x8080808080808080ULL))
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i+=8;
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# else
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while(i<buf_size && !((~*(const uint32_t*)(buf+i) & (*(const uint32_t*)(buf+i) - 0x01010101U)) & 0x80808080U))
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i+=4;
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# endif
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/* we check i < buf_size instead of i + 3 / 7 because it is
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* simpler and there must be FF_INPUT_BUFFER_PADDING_SIZE
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* bytes at the end.
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*/
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#if HAVE_FAST_64BIT
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while (i < buf_size &&
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!((~*(const uint64_t *)(buf + i) &
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(*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
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0x8080808080808080ULL))
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i += 8;
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#else
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while (i < buf_size &&
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!((~*(const uint32_t *)(buf + i) &
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(*(const uint32_t *)(buf + i) - 0x01010101U)) &
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0x80808080U))
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i += 4;
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#endif
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for(; i<buf_size; i++){
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if(!buf[i]){
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state=2;
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#endif
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for (; i < buf_size; i++)
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if (!buf[i]) {
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state = 2;
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break;
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}
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}
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}else if(state<=2){
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if(buf[i]==1) state^= 5; //2->7, 1->4, 0->5
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else if(buf[i]) state = 7;
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else state>>=1; //2->1, 1->0, 0->0
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}else if(state<=5){
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int v= buf[i] & 0x1F;
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if(v==6 || v==7 || v==8 || v==9){
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if(pc->frame_start_found){
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} else if (state <= 2) {
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if (buf[i] == 1)
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state ^= 5; // 2->7, 1->4, 0->5
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else if (buf[i])
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state = 7;
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else
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state >>= 1; // 2->1, 1->0, 0->0
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} else if (state <= 5) {
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int v = buf[i] & 0x1F;
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if (v == 6 || v == 7 || v == 8 || v == 9) {
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if (pc->frame_start_found) {
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i++;
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goto found;
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}
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}else if(v==1 || v==2 || v==5){
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if(pc->frame_start_found){
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state+=8;
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} else if (v == 1 || v == 2 || v == 5) {
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if (pc->frame_start_found) {
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state += 8;
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continue;
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}else
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} else
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pc->frame_start_found = 1;
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}
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state= 7;
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}else{
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if(buf[i] & 0x80)
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state = 7;
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} else {
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if (buf[i] & 0x80)
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goto found;
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state= 7;
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state = 7;
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}
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}
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pc->state= state;
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pc->state = state;
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return END_NOT_FOUND;
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found:
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pc->state=7;
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pc->frame_start_found= 0;
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return i-(state&5);
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pc->state = 7;
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pc->frame_start_found = 0;
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return i - (state & 5);
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}
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/**
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@ -110,7 +120,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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AVCodecContext *avctx,
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const uint8_t *buf, int buf_size)
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{
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H264Context *h = s->priv_data;
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H264Context *h = s->priv_data;
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const uint8_t *buf_end = buf + buf_size;
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unsigned int pps_id;
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unsigned int slice_type;
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@ -119,23 +129,23 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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int field_poc[2];
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/* set some sane default values */
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s->pict_type = AV_PICTURE_TYPE_I;
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s->key_frame = 0;
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s->pict_type = AV_PICTURE_TYPE_I;
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s->key_frame = 0;
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s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
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h->avctx= avctx;
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h->sei_recovery_frame_cnt = -1;
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h->sei_dpb_output_delay = 0;
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h->avctx = avctx;
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h->sei_recovery_frame_cnt = -1;
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h->sei_dpb_output_delay = 0;
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h->sei_cpb_removal_delay = -1;
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h->sei_buffering_period_present = 0;
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h->sei_buffering_period_present = 0;
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if (!buf_size)
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return 0;
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for(;;) {
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for (;;) {
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int src_length, dst_length, consumed;
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buf = avpriv_find_start_code(buf, buf_end, &state);
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if(buf >= buf_end)
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if (buf >= buf_end)
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break;
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--buf;
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src_length = buf_end - buf;
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@ -147,12 +157,12 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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src_length = 20;
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break;
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}
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ptr= ff_h264_decode_nal(h, buf, &dst_length, &consumed, src_length);
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if (ptr==NULL || dst_length < 0)
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ptr = ff_h264_decode_nal(h, buf, &dst_length, &consumed, src_length);
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if (ptr == NULL || dst_length < 0)
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break;
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init_get_bits(&h->gb, ptr, 8*dst_length);
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switch(h->nal_unit_type) {
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init_get_bits(&h->gb, ptr, 8 * dst_length);
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switch (h->nal_unit_type) {
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case NAL_SPS:
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ff_h264_decode_seq_parameter_set(h);
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break;
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@ -169,42 +179,45 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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h->prev_frame_num_offset = 0;
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h->prev_poc_msb =
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h->prev_poc_lsb = 0;
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/* fall through */
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/* fall through */
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case NAL_SLICE:
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get_ue_golomb(&h->gb); // skip first_mb_in_slice
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slice_type = get_ue_golomb_31(&h->gb);
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slice_type = get_ue_golomb_31(&h->gb);
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s->pict_type = golomb_to_pict_type[slice_type % 5];
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if (h->sei_recovery_frame_cnt >= 0) {
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/* key frame, since recovery_frame_cnt is set */
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s->key_frame = 1;
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}
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pps_id= get_ue_golomb(&h->gb);
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if(pps_id>=MAX_PPS_COUNT) {
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av_log(h->avctx, AV_LOG_ERROR, "pps_id out of range\n");
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pps_id = get_ue_golomb(&h->gb);
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if (pps_id >= MAX_PPS_COUNT) {
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av_log(h->avctx, AV_LOG_ERROR,
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"pps_id out of range\n");
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return -1;
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}
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if(!h->pps_buffers[pps_id]) {
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av_log(h->avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
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if (!h->pps_buffers[pps_id]) {
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av_log(h->avctx, AV_LOG_ERROR,
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"non-existing PPS referenced\n");
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return -1;
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}
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h->pps= *h->pps_buffers[pps_id];
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if(!h->sps_buffers[h->pps.sps_id]) {
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av_log(h->avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
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h->pps = *h->pps_buffers[pps_id];
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if (!h->sps_buffers[h->pps.sps_id]) {
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av_log(h->avctx, AV_LOG_ERROR,
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"non-existing SPS referenced\n");
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return -1;
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}
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h->sps = *h->sps_buffers[h->pps.sps_id];
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h->sps = *h->sps_buffers[h->pps.sps_id];
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h->frame_num = get_bits(&h->gb, h->sps.log2_max_frame_num);
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avctx->profile = ff_h264_get_profile(&h->sps);
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avctx->level = h->sps.level_idc;
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if(h->sps.frame_mbs_only_flag){
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h->picture_structure= PICT_FRAME;
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}else{
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if(get_bits1(&h->gb)) { //field_pic_flag
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h->picture_structure= PICT_TOP_FIELD + get_bits1(&h->gb); //bottom_field_flag
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if (h->sps.frame_mbs_only_flag) {
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h->picture_structure = PICT_FRAME;
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} else {
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if (get_bits1(&h->gb)) { // field_pic_flag
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h->picture_structure = PICT_TOP_FIELD + get_bits1(&h->gb); // bottom_field_flag
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} else {
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h->picture_structure= PICT_FRAME;
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h->picture_structure = PICT_FRAME;
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}
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}
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@ -213,43 +226,46 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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if (h->sps.poc_type == 0) {
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h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
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if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
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if (h->pps.pic_order_present == 1 &&
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h->picture_structure == PICT_FRAME)
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h->delta_poc_bottom = get_se_golomb(&h->gb);
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}
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if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
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if (h->sps.poc_type == 1 &&
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!h->sps.delta_pic_order_always_zero_flag) {
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h->delta_poc[0] = get_se_golomb(&h->gb);
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if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
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if (h->pps.pic_order_present == 1 &&
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h->picture_structure == PICT_FRAME)
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h->delta_poc[1] = get_se_golomb(&h->gb);
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}
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ff_init_poc(h, field_poc, NULL);
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if(h->sps.pic_struct_present_flag) {
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if (h->sps.pic_struct_present_flag) {
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switch (h->sei_pic_struct) {
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case SEI_PIC_STRUCT_TOP_FIELD:
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case SEI_PIC_STRUCT_BOTTOM_FIELD:
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s->repeat_pict = 0;
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break;
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case SEI_PIC_STRUCT_FRAME:
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case SEI_PIC_STRUCT_TOP_BOTTOM:
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case SEI_PIC_STRUCT_BOTTOM_TOP:
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s->repeat_pict = 1;
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break;
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case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
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case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
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s->repeat_pict = 2;
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break;
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case SEI_PIC_STRUCT_FRAME_DOUBLING:
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s->repeat_pict = 3;
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break;
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case SEI_PIC_STRUCT_FRAME_TRIPLING:
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s->repeat_pict = 5;
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break;
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default:
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s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
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break;
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case SEI_PIC_STRUCT_TOP_FIELD:
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case SEI_PIC_STRUCT_BOTTOM_FIELD:
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s->repeat_pict = 0;
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break;
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case SEI_PIC_STRUCT_FRAME:
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case SEI_PIC_STRUCT_TOP_BOTTOM:
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case SEI_PIC_STRUCT_BOTTOM_TOP:
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s->repeat_pict = 1;
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break;
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case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
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case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
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s->repeat_pict = 2;
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break;
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case SEI_PIC_STRUCT_FRAME_DOUBLING:
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s->repeat_pict = 3;
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break;
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case SEI_PIC_STRUCT_FRAME_TRIPLING:
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s->repeat_pict = 5;
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break;
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default:
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s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
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break;
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}
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} else {
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s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
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@ -259,17 +275,17 @@ static inline int parse_nal_units(AVCodecParserContext *s,
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s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
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if (h->sps.pic_struct_present_flag) {
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switch (h->sei_pic_struct) {
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case SEI_PIC_STRUCT_TOP_BOTTOM:
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case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
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s->field_order = AV_FIELD_TT;
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break;
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case SEI_PIC_STRUCT_BOTTOM_TOP:
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case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
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s->field_order = AV_FIELD_BB;
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break;
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default:
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s->field_order = AV_FIELD_PROGRESSIVE;
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break;
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case SEI_PIC_STRUCT_TOP_BOTTOM:
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case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
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s->field_order = AV_FIELD_TT;
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break;
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case SEI_PIC_STRUCT_BOTTOM_TOP:
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case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
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s->field_order = AV_FIELD_BB;
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break;
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default:
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s->field_order = AV_FIELD_PROGRESSIVE;
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break;
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}
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} else {
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if (field_poc[0] < field_poc[1])
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@ -301,7 +317,7 @@ static int h264_parse(AVCodecParserContext *s,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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H264Context *h = s->priv_data;
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H264Context *h = s->priv_data;
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ParseContext *pc = &h->parse_context;
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int next;
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@ -320,19 +336,19 @@ static int h264_parse(AVCodecParserContext *s,
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}
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}
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if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
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next= buf_size;
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}else{
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if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
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next = buf_size;
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} else {
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next = h264_find_frame_end(h, buf, buf_size);
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if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
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*poutbuf = NULL;
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*poutbuf = NULL;
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*poutbuf_size = 0;
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return buf_size;
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}
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if(next<0 && next != END_NOT_FOUND){
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assert(pc->last_index + next >= 0 );
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if (next < 0 && next != END_NOT_FOUND) {
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assert(pc->last_index + next >= 0);
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h264_find_frame_end(h, &pc->buffer[pc->last_index + next], -next); // update state
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}
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}
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@ -353,7 +369,7 @@ static int h264_parse(AVCodecParserContext *s,
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s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
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}
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*poutbuf = buf;
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return next;
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}
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@ -363,28 +379,33 @@ static int h264_split(AVCodecContext *avctx,
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{
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int i;
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uint32_t state = -1;
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int has_sps= 0;
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int has_sps = 0;
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for(i=0; i<=buf_size; i++){
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if((state&0xFFFFFF1F) == 0x107)
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has_sps=1;
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/* if((state&0xFFFFFF1F) == 0x101 || (state&0xFFFFFF1F) == 0x102 || (state&0xFFFFFF1F) == 0x105){
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}*/
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if((state&0xFFFFFF00) == 0x100 && (state&0xFFFFFF1F) != 0x107 && (state&0xFFFFFF1F) != 0x108 && (state&0xFFFFFF1F) != 0x109){
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if(has_sps){
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while(i>4 && buf[i-5]==0) i--;
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return i-4;
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for (i = 0; i <= buf_size; i++) {
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if ((state & 0xFFFFFF1F) == 0x107)
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has_sps = 1;
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/* if((state&0xFFFFFF1F) == 0x101 ||
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* (state&0xFFFFFF1F) == 0x102 ||
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* (state&0xFFFFFF1F) == 0x105) {
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* }
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*/
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if ((state & 0xFFFFFF00) == 0x100 && (state & 0xFFFFFF1F) != 0x107 &&
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(state & 0xFFFFFF1F) != 0x108 && (state & 0xFFFFFF1F) != 0x109) {
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if (has_sps) {
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while (i > 4 && buf[i - 5] == 0)
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||||
i--;
|
||||
return i - 4;
|
||||
}
|
||||
}
|
||||
if (i<buf_size)
|
||||
state= (state<<8) | buf[i];
|
||||
if (i < buf_size)
|
||||
state = (state << 8) | buf[i];
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void close(AVCodecParserContext *s)
|
||||
{
|
||||
H264Context *h = s->priv_data;
|
||||
H264Context *h = s->priv_data;
|
||||
ParseContext *pc = &h->parse_context;
|
||||
|
||||
av_free(pc->buffer);
|
||||
@ -394,7 +415,7 @@ static void close(AVCodecParserContext *s)
|
||||
static av_cold int init(AVCodecParserContext *s)
|
||||
{
|
||||
H264Context *h = s->priv_data;
|
||||
h->thread_context[0] = h;
|
||||
h->thread_context[0] = h;
|
||||
h->slice_context_count = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user