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avcodec/mjpegenc: Drop i_tex misuse, set itex/header bits correctly, fix 2pass encoding 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-02-09 22:10:43 +01:00
parent e10bd12c25
commit daccbe81a2
1 changed files with 2 additions and 12 deletions
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14
libavcodec/mjpegenc.c
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@ -39,8 +39,6 @@
#include "mjpeg.h"
#include "mjpegenc.h"
// Don't know, but let's guess 16 bits per code
#define MJPEG_HUFFMAN_EST_BITS_PER_CODE 16
static int alloc_huffman(MpegEncContext *s)
{
@ -148,6 +146,7 @@ void ff_mjpeg_encode_picture_frame(MpegEncContext *s)
size_t total_bits = 0;
size_t bytes_needed;
s->header_bits = get_bits_diff(s);
// Estimate the total size first
for (i = 0; i < m->huff_ncode; i++) {
table_id = m->huff_buffer[i].table_id;
@ -172,6 +171,7 @@ void ff_mjpeg_encode_picture_frame(MpegEncContext *s)
}
m->huff_ncode = 0;
s->i_tex_bits = get_bits_diff(s);
}
/**
@ -271,15 +271,6 @@ int ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
{
int i, is_chroma_420;
// Number of bits used depends on future data.
// So, nothing that relies on encoding many times and taking the
// one with the fewest bits will work properly here.
if (s->i_tex_bits != MJPEG_HUFFMAN_EST_BITS_PER_CODE *
s->mjpeg_ctx->huff_ncode) {
av_log(s->avctx, AV_LOG_ERROR, "Unsupported encoding method\n");
return AVERROR(EINVAL);
}
if (s->chroma_format == CHROMA_444) {
encode_block(s, block[0], 0);
encode_block(s, block[2], 2);
@ -310,7 +301,6 @@ int ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
}
}
s->i_tex_bits = MJPEG_HUFFMAN_EST_BITS_PER_CODE * s->mjpeg_ctx->huff_ncode;
return 0;
}