lavc: remove mp3_header_(de)compress bitstream filters

They mangle the mp3 header in a non-standard way to save a few bytes.
People who care about space so much should just use a more efficient
codec.

1 files changed, 0 insertions, 98 deletions

diff --git a/libavcodec/mp3_header_decompress_bsf.c b/libavcodec/mp3_header_decompress_bsf.c
deleted file mode 100644
index 8e086a1192..0000000000
--- a/libavcodec/mp3_header_decompress_bsf.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "mpegaudiodecheader.h"
-#include "mpegaudiodata.h"
-
-
-static int mp3_header_decompress(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
-                     uint8_t **poutbuf, int *poutbuf_size,
-                     const uint8_t *buf, int buf_size, int keyframe){
-    uint32_t header;
-    int sample_rate= avctx->sample_rate;
-    int sample_rate_index=0;
-    int lsf, mpeg25, bitrate_index, frame_size;
-
-    header = AV_RB32(buf);
-    if(ff_mpa_check_header(header) >= 0){
-        *poutbuf= (uint8_t *) buf;
-        *poutbuf_size= buf_size;
-
-        return 0;
-    }
-
-    if(avctx->extradata_size != 15 || strcmp(avctx->extradata, "FFCMP3 0.0")){
-        av_log(avctx, AV_LOG_ERROR, "Extradata invalid %d\n", avctx->extradata_size);
-        return -1;
-    }
-
-    header= AV_RB32(avctx->extradata+11) & MP3_MASK;
-
-    lsf     = sample_rate < (24000+32000)/2;
-    mpeg25  = sample_rate < (12000+16000)/2;
-    sample_rate_index= (header>>10)&3;
-    sample_rate= avpriv_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); //in case sample rate is a little off
-
-    for(bitrate_index=2; bitrate_index<30; bitrate_index++){
-        frame_size = avpriv_mpa_bitrate_tab[lsf][2][bitrate_index>>1];
-        frame_size = (frame_size * 144000) / (sample_rate << lsf) + (bitrate_index&1);
-        if(frame_size == buf_size + 4)
-            break;
-        if(frame_size == buf_size + 6)
-            break;
-    }
-    if(bitrate_index == 30){
-        av_log(avctx, AV_LOG_ERROR, "Could not find bitrate_index.\n");
-        return -1;
-    }
-
-    header |= (bitrate_index&1)<<9;
-    header |= (bitrate_index>>1)<<12;
-    header |= (frame_size == buf_size + 4)<<16; //FIXME actually set a correct crc instead of 0
-
-    *poutbuf_size= frame_size;
-    *poutbuf= av_malloc(frame_size + FF_INPUT_BUFFER_PADDING_SIZE);
-    memcpy(*poutbuf + frame_size - buf_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
-    if(avctx->channels==2){
-        uint8_t *p= *poutbuf + frame_size - buf_size;
-        if(lsf){
-            FFSWAP(int, p[1], p[2]);
-            header |= (p[1] & 0xC0)>>2;
-            p[1] &= 0x3F;
-        }else{
-            header |= p[1] & 0x30;
-            p[1] &= 0xCF;
-        }
-    }
-
-    AV_WB32(*poutbuf, header);
-
-    return 1;
-}
-
-AVBitStreamFilter ff_mp3_header_decompress_bsf={
-    "mp3decomp",
-    0,
-    mp3_header_decompress,
-};