diff options
Diffstat (limited to 'libavcodec/bsf/mp3_header_decompress.c')
-rw-r--r-- | libavcodec/bsf/mp3_header_decompress.c | 130 |
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, -}; |