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TM2 fixes by Kostya

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Originally committed as revision 4645 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2005-10-15 14:33:11 +00:00
parent aa35d2647c
commit adeba28193
1 changed files with 9 additions and 7 deletions
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16
libavcodec/truemotion2.c
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@ -29,7 +29,7 @@
#include "dsputil.h" #include "dsputil.h"
#define TM2_ESCAPE 0x80000000 #define TM2_ESCAPE 0x80000000
#define TM2_DELTAS 32 #define TM2_DELTAS 64
/* Huffman-coded streams of different types of blocks */ /* Huffman-coded streams of different types of blocks */
enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO, enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS}; TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
@ -218,7 +218,7 @@ static inline int tm2_read_header(TM2Context *ctx, uint8_t *buf)
length = LE_32(buf); length = LE_32(buf);
buf += 4; buf += 4;
init_get_bits(&ctx->gb, buf, 32); init_get_bits(&ctx->gb, buf, 32 * 8);
size = get_bits_long(&ctx->gb, 31); size = get_bits_long(&ctx->gb, 31);
h = get_bits(&ctx->gb, 15); h = get_bits(&ctx->gb, 15);
w = get_bits(&ctx->gb, 15); w = get_bits(&ctx->gb, 15);
@ -281,7 +281,7 @@ static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
len = BE_32(buf); buf += 4; cur += 4; len = BE_32(buf); buf += 4; cur += 4;
} }
if(len > 0) { if(len > 0) {
init_get_bits(&ctx->gb, buf, skip - cur); init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
if(tm2_read_deltas(ctx, stream_id) == -1) if(tm2_read_deltas(ctx, stream_id) == -1)
return -1; return -1;
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
@ -295,7 +295,7 @@ static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
buf += 4; cur += 4; buf += 4; cur += 4;
buf += 4; cur += 4; /* unused by decoder */ buf += 4; cur += 4; /* unused by decoder */
init_get_bits(&ctx->gb, buf, skip - cur); init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
if(tm2_build_huff_table(ctx, &codes) == -1) if(tm2_build_huff_table(ctx, &codes) == -1)
return -1; return -1;
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
@ -312,11 +312,12 @@ static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
ctx->tok_lens[stream_id] = toks; ctx->tok_lens[stream_id] = toks;
len = BE_32(buf); buf += 4; cur += 4; len = BE_32(buf); buf += 4; cur += 4;
if(len > 0) { if(len > 0) {
init_get_bits(&ctx->gb, buf, skip - cur); init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
for(i = 0; i < toks; i++) for(i = 0; i < toks; i++)
ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
} else { } else {
memset(ctx->tokens[stream_id], 0, toks * sizeof(int)); for(i = 0; i < toks; i++)
ctx->tokens[stream_id][i] = codes.recode[0];
} }
tm2_free_codes(&codes); tm2_free_codes(&codes);
@ -765,7 +766,8 @@ static int decode_frame(AVCodecContext *avctx,
int skip, t; int skip, t;
p->reference = 1; p->reference = 1;
if(avctx->get_buffer(avctx, p) < 0){ p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if(avctx->reget_buffer(avctx, p) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1; return -1;
} }