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Diffstat (limited to 'libavcodec/bsf/mp3_header_decompress.c')
-rw-r--r--libavcodec/bsf/mp3_header_decompress.c130
1 files changed, 0 insertions, 130 deletions
diff --git a/libavcodec/bsf/mp3_header_decompress.c b/libavcodec/bsf/mp3_header_decompress.c
deleted file mode 100644
index a177029fe0..0000000000
--- a/libavcodec/bsf/mp3_header_decompress.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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.
- *
- * FFmpeg 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 FFmpeg; 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 "bsf.h"
-#include "bsf_internal.h"
-#include "defs.h"
-#include "mpegaudiodecheader.h"
-#include "mpegaudiodata.h"
-
-
-static int mp3_header_decompress(AVBSFContext *ctx, AVPacket *out)
-{
- AVPacket *in;
- uint32_t header;
- int sample_rate= ctx->par_in->sample_rate;
- int sample_rate_index=0;
- int lsf, mpeg25, bitrate_index, frame_size, ret;
- uint8_t *buf;
- int buf_size;
-
- ret = ff_bsf_get_packet(ctx, &in);
- if (ret < 0)
- return ret;
-
- buf = in->data;
- buf_size = in->size;
-
- header = AV_RB32(buf);
- if(ff_mpa_check_header(header) >= 0){
- av_packet_move_ref(out, in);
- av_packet_free(&in);
-
- return 0;
- }
-
- if(ctx->par_in->extradata_size != 15 || strcmp(ctx->par_in->extradata, "FFCMP3 0.0")){
- av_log(ctx, AV_LOG_ERROR, "Extradata invalid %d\n", ctx->par_in->extradata_size);
- ret = AVERROR(EINVAL);
- goto fail;
- }
-
- header= AV_RB32(ctx->par_in->extradata+11) & MP3_MASK;
-
- lsf = sample_rate < (24000+32000)/2;
- mpeg25 = sample_rate < (12000+16000)/2;
- sample_rate_index= (header>>10)&3;
- if (sample_rate_index == 3) {
- ret = AVERROR_INVALIDDATA;
- goto fail;
- }
-
- sample_rate = ff_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 = ff_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(ctx, AV_LOG_ERROR, "Could not find bitrate_index.\n");
- ret = AVERROR(EINVAL);
- goto fail;
- }
-
- 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
-
- ret = av_new_packet(out, frame_size);
- if (ret < 0)
- goto fail;
- ret = av_packet_copy_props(out, in);
- if (ret < 0) {
- av_packet_unref(out);
- goto fail;
- }
- memcpy(out->data + frame_size - buf_size, buf, buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
-
- if (ctx->par_in->ch_layout.nb_channels == 2){
- uint8_t *p= out->data + 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(out->data, header);
-
- ret = 0;
-
-fail:
- av_packet_free(&in);
- return ret;
-}
-
-static const enum AVCodecID codec_ids[] = {
- AV_CODEC_ID_MP3, AV_CODEC_ID_NONE,
-};
-
-const FFBitStreamFilter ff_mp3_header_decompress_bsf = {
- .p.name = "mp3decomp",
- .p.codec_ids = codec_ids,
- .filter = mp3_header_decompress,
-};