chasing indexing error

1 files changed, 0 insertions, 536 deletions

diff --git a/ffmpeg/libavcodec/ralf.c b/ffmpeg/libavcodec/ralf.c
deleted file mode 100644
index 8a319ac..0000000
--- a/ffmpeg/libavcodec/ralf.c
+++ /dev/null
@@ -1,536 +0,0 @@
-/*
- * RealAudio Lossless decoder
- *
- * Copyright (c) 2012 Konstantin Shishkov
- *
- * 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
- */
-
-/**
- * @file
- * This is a decoder for Real Audio Lossless format.
- * Dedicated to the mastermind behind it, Ralph Wiggum.
- */
-
-#include "libavutil/attributes.h"
-#include "libavutil/channel_layout.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "golomb.h"
-#include "internal.h"
-#include "unary.h"
-#include "ralfdata.h"
-
-#define FILTER_NONE 0
-#define FILTER_RAW  642
-
-typedef struct VLCSet {
-    VLC filter_params;
-    VLC bias;
-    VLC coding_mode;
-    VLC filter_coeffs[10][11];
-    VLC short_codes[15];
-    VLC long_codes[125];
-} VLCSet;
-
-#define RALF_MAX_PKT_SIZE 8192
-
-typedef struct RALFContext {
-    int version;
-    int max_frame_size;
-    VLCSet sets[3];
-    int32_t channel_data[2][4096];
-
-    int     filter_params;   ///< combined filter parameters for the current channel data
-    int     filter_length;   ///< length of the filter for the current channel data
-    int     filter_bits;     ///< filter precision for the current channel data
-    int32_t filter[64];
-
-    int     bias[2];         ///< a constant value added to channel data after filtering
-
-    int num_blocks;          ///< number of blocks inside the frame
-    int sample_offset;
-    int block_size[1 << 12]; ///< size of the blocks
-    int block_pts[1 << 12];  ///< block start time (in milliseconds)
-
-    uint8_t pkt[16384];
-    int     has_pkt;
-} RALFContext;
-
-#define MAX_ELEMS 644 // no RALF table uses more than that
-
-static av_cold int init_ralf_vlc(VLC *vlc, const uint8_t *data, int elems)
-{
-    uint8_t  lens[MAX_ELEMS];
-    uint16_t codes[MAX_ELEMS];
-    int counts[17], prefixes[18];
-    int i, cur_len;
-    int max_bits = 0;
-    int nb = 0;
-
-    for (i = 0; i <= 16; i++)
-        counts[i] = 0;
-    for (i = 0; i < elems; i++) {
-        cur_len  = (nb ? *data & 0xF : *data >> 4) + 1;
-        counts[cur_len]++;
-        max_bits = FFMAX(max_bits, cur_len);
-        lens[i]  = cur_len;
-        data    += nb;
-        nb      ^= 1;
-    }
-    prefixes[1] = 0;
-    for (i = 1; i <= 16; i++)
-        prefixes[i + 1] = (prefixes[i] + counts[i]) << 1;
-
-    for (i = 0; i < elems; i++)
-        codes[i] = prefixes[lens[i]]++;
-
-    return ff_init_vlc_sparse(vlc, FFMIN(max_bits, 9), elems,
-                              lens, 1, 1, codes, 2, 2, NULL, 0, 0, 0);
-}
-
-static av_cold int decode_close(AVCodecContext *avctx)
-{
-    RALFContext *ctx = avctx->priv_data;
-    int i, j, k;
-
-    for (i = 0; i < 3; i++) {
-        ff_free_vlc(&ctx->sets[i].filter_params);
-        ff_free_vlc(&ctx->sets[i].bias);
-        ff_free_vlc(&ctx->sets[i].coding_mode);
-        for (j = 0; j < 10; j++)
-            for (k = 0; k < 11; k++)
-                ff_free_vlc(&ctx->sets[i].filter_coeffs[j][k]);
-        for (j = 0; j < 15; j++)
-            ff_free_vlc(&ctx->sets[i].short_codes[j]);
-        for (j = 0; j < 125; j++)
-            ff_free_vlc(&ctx->sets[i].long_codes[j]);
-    }
-
-    return 0;
-}
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
-    RALFContext *ctx = avctx->priv_data;
-    int i, j, k;
-    int ret;
-
-    if (avctx->extradata_size < 24 || memcmp(avctx->extradata, "LSD:", 4)) {
-        av_log(avctx, AV_LOG_ERROR, "Extradata is not groovy, dude\n");
-        return AVERROR_INVALIDDATA;
-    }
-
-    ctx->version = AV_RB16(avctx->extradata + 4);
-    if (ctx->version != 0x103) {
-        avpriv_request_sample(avctx, "Unknown version %X", ctx->version);
-        return AVERROR_PATCHWELCOME;
-    }
-
-    avctx->channels    = AV_RB16(avctx->extradata + 8);
-    avctx->sample_rate = AV_RB32(avctx->extradata + 12);
-    if (avctx->channels < 1 || avctx->channels > 2
-        || avctx->sample_rate < 8000 || avctx->sample_rate > 96000) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid coding parameters %d Hz %d ch\n",
-               avctx->sample_rate, avctx->channels);
-        return AVERROR_INVALIDDATA;
-    }
-    avctx->sample_fmt     = AV_SAMPLE_FMT_S16P;
-    avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO
-                                                   : AV_CH_LAYOUT_MONO;
-
-    ctx->max_frame_size = AV_RB32(avctx->extradata + 16);
-    if (ctx->max_frame_size > (1 << 20) || !ctx->max_frame_size) {
-        av_log(avctx, AV_LOG_ERROR, "invalid frame size %d\n",
-               ctx->max_frame_size);
-    }
-    ctx->max_frame_size = FFMAX(ctx->max_frame_size, avctx->sample_rate);
-
-    for (i = 0; i < 3; i++) {
-        ret = init_ralf_vlc(&ctx->sets[i].filter_params, filter_param_def[i],
-                            FILTERPARAM_ELEMENTS);
-        if (ret < 0) {
-            decode_close(avctx);
-            return ret;
-        }
-        ret = init_ralf_vlc(&ctx->sets[i].bias, bias_def[i], BIAS_ELEMENTS);
-        if (ret < 0) {
-            decode_close(avctx);
-            return ret;
-        }
-        ret = init_ralf_vlc(&ctx->sets[i].coding_mode, coding_mode_def[i],
-                            CODING_MODE_ELEMENTS);
-        if (ret < 0) {
-            decode_close(avctx);
-            return ret;
-        }
-        for (j = 0; j < 10; j++) {
-            for (k = 0; k < 11; k++) {
-                ret = init_ralf_vlc(&ctx->sets[i].filter_coeffs[j][k],
-                                    filter_coeffs_def[i][j][k],
-                                    FILTER_COEFFS_ELEMENTS);
-                if (ret < 0) {
-                    decode_close(avctx);
-                    return ret;
-                }
-            }
-        }
-        for (j = 0; j < 15; j++) {
-            ret = init_ralf_vlc(&ctx->sets[i].short_codes[j],
-                                short_codes_def[i][j], SHORT_CODES_ELEMENTS);
-            if (ret < 0) {
-                decode_close(avctx);
-                return ret;
-            }
-        }
-        for (j = 0; j < 125; j++) {
-            ret = init_ralf_vlc(&ctx->sets[i].long_codes[j],
-                                long_codes_def[i][j], LONG_CODES_ELEMENTS);
-            if (ret < 0) {
-                decode_close(avctx);
-                return ret;
-            }
-        }
-    }
-
-    return 0;
-}
-
-static inline int extend_code(GetBitContext *gb, int val, int range, int bits)
-{
-    if (val == 0) {
-        val = -range - get_ue_golomb(gb);
-    } else if (val == range * 2) {
-        val =  range + get_ue_golomb(gb);
-    } else {
-        val -= range;
-    }
-    if (bits)
-        val = (val << bits) | get_bits(gb, bits);
-    return val;
-}
-
-static int decode_channel(RALFContext *ctx, GetBitContext *gb, int ch,
-                          int length, int mode, int bits)
-{
-    int i, t;
-    int code_params;
-    VLCSet *set = ctx->sets + mode;
-    VLC *code_vlc; int range, range2, add_bits;
-    int *dst = ctx->channel_data[ch];
-
-    ctx->filter_params = get_vlc2(gb, set->filter_params.table, 9, 2);
-    ctx->filter_bits   = (ctx->filter_params - 2) >> 6;
-    ctx->filter_length = ctx->filter_params - (ctx->filter_bits << 6) - 1;
-
-    if (ctx->filter_params == FILTER_RAW) {
-        for (i = 0; i < length; i++)
-            dst[i] = get_bits(gb, bits);
-        ctx->bias[ch] = 0;
-        return 0;
-    }
-
-    ctx->bias[ch] = get_vlc2(gb, set->bias.table, 9, 2);
-    ctx->bias[ch] = extend_code(gb, ctx->bias[ch], 127, 4);
-
-    if (ctx->filter_params == FILTER_NONE) {
-        memset(dst, 0, sizeof(*dst) * length);
-        return 0;
-    }
-
-    if (ctx->filter_params > 1) {
-        int cmode = 0, coeff = 0;
-        VLC *vlc = set->filter_coeffs[ctx->filter_bits] + 5;
-
-        add_bits = ctx->filter_bits;
-
-        for (i = 0; i < ctx->filter_length; i++) {
-            t = get_vlc2(gb, vlc[cmode].table, vlc[cmode].bits, 2);
-            t = extend_code(gb, t, 21, add_bits);
-            if (!cmode)
-                coeff -= 12 << add_bits;
-            coeff = t - coeff;
-            ctx->filter[i] = coeff;
-
-            cmode = coeff >> add_bits;
-            if (cmode < 0) {
-                cmode = -1 - av_log2(-cmode);
-                if (cmode < -5)
-                    cmode = -5;
-            } else if (cmode > 0) {
-                cmode =  1 + av_log2(cmode);
-                if (cmode > 5)
-                    cmode = 5;
-            }
-        }
-    }
-
-    code_params = get_vlc2(gb, set->coding_mode.table, set->coding_mode.bits, 2);
-    if (code_params >= 15) {
-        add_bits = av_clip((code_params / 5 - 3) / 2, 0, 10);
-        if (add_bits > 9 && (code_params % 5) != 2)
-            add_bits--;
-        range    = 10;
-        range2   = 21;
-        code_vlc = set->long_codes + code_params - 15;
-    } else {
-        add_bits = 0;
-        range    = 6;
-        range2   = 13;
-        code_vlc = set->short_codes + code_params;
-    }
-
-    for (i = 0; i < length; i += 2) {
-        int code1, code2;
-
-        t = get_vlc2(gb, code_vlc->table, code_vlc->bits, 2);
-        code1 = t / range2;
-        code2 = t % range2;
-        dst[i]     = extend_code(gb, code1, range, 0) << add_bits;
-        dst[i + 1] = extend_code(gb, code2, range, 0) << add_bits;
-        if (add_bits) {
-            dst[i]     |= get_bits(gb, add_bits);
-            dst[i + 1] |= get_bits(gb, add_bits);
-        }
-    }
-
-    return 0;
-}
-
-static void apply_lpc(RALFContext *ctx, int ch, int length, int bits)
-{
-    int i, j, acc;
-    int *audio = ctx->channel_data[ch];
-    int bias = 1 << (ctx->filter_bits - 1);
-    int max_clip = (1 << bits) - 1, min_clip = -max_clip - 1;
-
-    for (i = 1; i < length; i++) {
-        int flen = FFMIN(ctx->filter_length, i);
-
-        acc = 0;
-        for (j = 0; j < flen; j++)
-            acc += ctx->filter[j] * audio[i - j - 1];
-        if (acc < 0) {
-            acc = (acc + bias - 1) >> ctx->filter_bits;
-            acc = FFMAX(acc, min_clip);
-        } else {
-            acc = (acc + bias) >> ctx->filter_bits;
-            acc = FFMIN(acc, max_clip);
-        }
-        audio[i] += acc;
-    }
-}
-
-static int decode_block(AVCodecContext *avctx, GetBitContext *gb,
-                        int16_t *dst0, int16_t *dst1)
-{
-    RALFContext *ctx = avctx->priv_data;
-    int len, ch, ret;
-    int dmode, mode[2], bits[2];
-    int *ch0, *ch1;
-    int i, t, t2;
-
-    len = 12 - get_unary(gb, 0, 6);
-
-    if (len <= 7) len ^= 1; // codes for length = 6 and 7 are swapped
-    len = 1 << len;
-
-    if (ctx->sample_offset + len > ctx->max_frame_size) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Decoder's stomach is crying, it ate too many samples\n");
-        return AVERROR_INVALIDDATA;
-    }
-
-    if (avctx->channels > 1)
-        dmode = get_bits(gb, 2) + 1;
-    else
-        dmode = 0;
-
-    mode[0] = (dmode == 4) ? 1 : 0;
-    mode[1] = (dmode >= 2) ? 2 : 0;
-    bits[0] = 16;
-    bits[1] = (mode[1] == 2) ? 17 : 16;
-
-    for (ch = 0; ch < avctx->channels; ch++) {
-        if ((ret = decode_channel(ctx, gb, ch, len, mode[ch], bits[ch])) < 0)
-            return ret;
-        if (ctx->filter_params > 1 && ctx->filter_params != FILTER_RAW) {
-            ctx->filter_bits += 3;
-            apply_lpc(ctx, ch, len, bits[ch]);
-        }
-        if (get_bits_left(gb) < 0)
-            return AVERROR_INVALIDDATA;
-    }
-    ch0 = ctx->channel_data[0];
-    ch1 = ctx->channel_data[1];
-    switch (dmode) {
-    case 0:
-        for (i = 0; i < len; i++)
-            dst0[i] = ch0[i] + ctx->bias[0];
-        break;
-    case 1:
-        for (i = 0; i < len; i++) {
-            dst0[i] = ch0[i] + ctx->bias[0];
-            dst1[i] = ch1[i] + ctx->bias[1];
-        }
-        break;
-    case 2:
-        for (i = 0; i < len; i++) {
-            ch0[i] += ctx->bias[0];
-            dst0[i] = ch0[i];
-            dst1[i] = ch0[i] - (ch1[i] + ctx->bias[1]);
-        }
-        break;
-    case 3:
-        for (i = 0; i < len; i++) {
-            t  = ch0[i] + ctx->bias[0];
-            t2 = ch1[i] + ctx->bias[1];
-            dst0[i] = t + t2;
-            dst1[i] = t;
-        }
-        break;
-    case 4:
-        for (i = 0; i < len; i++) {
-            t  =   ch1[i] + ctx->bias[1];
-            t2 = ((ch0[i] + ctx->bias[0]) << 1) | (t & 1);
-            dst0[i] = (t2 + t) / 2;
-            dst1[i] = (t2 - t) / 2;
-        }
-        break;
-    }
-
-    ctx->sample_offset += len;
-
-    return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
-                        AVPacket *avpkt)
-{
-    RALFContext *ctx = avctx->priv_data;
-    AVFrame *frame   = data;
-    int16_t *samples0;
-    int16_t *samples1;
-    int ret;
-    GetBitContext gb;
-    int table_size, table_bytes, i;
-    const uint8_t *src, *block_pointer;
-    int src_size;
-    int bytes_left;
-
-    if (ctx->has_pkt) {
-        ctx->has_pkt = 0;
-        table_bytes = (AV_RB16(avpkt->data) + 7) >> 3;
-        if (table_bytes + 3 > avpkt->size || avpkt->size > RALF_MAX_PKT_SIZE) {
-            av_log(avctx, AV_LOG_ERROR, "Wrong packet's breath smells of wrong data!\n");
-            return AVERROR_INVALIDDATA;
-        }
-        if (memcmp(ctx->pkt, avpkt->data, 2 + table_bytes)) {
-            av_log(avctx, AV_LOG_ERROR, "Wrong packet tails are wrong!\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        src      = ctx->pkt;
-        src_size = RALF_MAX_PKT_SIZE + avpkt->size;
-        memcpy(ctx->pkt + RALF_MAX_PKT_SIZE, avpkt->data + 2 + table_bytes,
-               avpkt->size - 2 - table_bytes);
-    } else {
-        if (avpkt->size == RALF_MAX_PKT_SIZE) {
-            memcpy(ctx->pkt, avpkt->data, avpkt->size);
-            ctx->has_pkt   = 1;
-            *got_frame_ptr = 0;
-
-            return avpkt->size;
-        }
-        src      = avpkt->data;
-        src_size = avpkt->size;
-    }
-
-    frame->nb_samples = ctx->max_frame_size;
-    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
-        return ret;
-    samples0 = (int16_t *)frame->data[0];
-    samples1 = (int16_t *)frame->data[1];
-
-    if (src_size < 5) {
-        av_log(avctx, AV_LOG_ERROR, "too short packets are too short!\n");
-        return AVERROR_INVALIDDATA;
-    }
-    table_size  = AV_RB16(src);
-    table_bytes = (table_size + 7) >> 3;
-    if (src_size < table_bytes + 3) {
-        av_log(avctx, AV_LOG_ERROR, "short packets are short!\n");
-        return AVERROR_INVALIDDATA;
-    }
-    init_get_bits(&gb, src + 2, table_size);
-    ctx->num_blocks = 0;
-    while (get_bits_left(&gb) > 0) {
-        ctx->block_size[ctx->num_blocks] = get_bits(&gb, 15);
-        if (get_bits1(&gb)) {
-            ctx->block_pts[ctx->num_blocks] = get_bits(&gb, 9);
-        } else {
-            ctx->block_pts[ctx->num_blocks] = 0;
-        }
-        ctx->num_blocks++;
-    }
-
-    block_pointer = src      + table_bytes + 2;
-    bytes_left    = src_size - table_bytes - 2;
-    ctx->sample_offset = 0;
-    for (i = 0; i < ctx->num_blocks; i++) {
-        if (bytes_left < ctx->block_size[i]) {
-            av_log(avctx, AV_LOG_ERROR, "I'm pedaling backwards\n");
-            break;
-        }
-        init_get_bits(&gb, block_pointer, ctx->block_size[i] * 8);
-        if (decode_block(avctx, &gb, samples0 + ctx->sample_offset,
-                                     samples1 + ctx->sample_offset) < 0) {
-            av_log(avctx, AV_LOG_ERROR, "Sir, I got carsick in your office. Not decoding the rest of packet.\n");
-            break;
-        }
-        block_pointer += ctx->block_size[i];
-        bytes_left    -= ctx->block_size[i];
-    }
-
-    frame->nb_samples = ctx->sample_offset;
-    *got_frame_ptr    = ctx->sample_offset > 0;
-
-    return avpkt->size;
-}
-
-static void decode_flush(AVCodecContext *avctx)
-{
-    RALFContext *ctx = avctx->priv_data;
-
-    ctx->has_pkt = 0;
-}
-
-
-AVCodec ff_ralf_decoder = {
-    .name           = "ralf",
-    .long_name      = NULL_IF_CONFIG_SMALL("RealAudio Lossless"),
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = AV_CODEC_ID_RALF,
-    .priv_data_size = sizeof(RALFContext),
-    .init           = decode_init,
-    .close          = decode_close,
-    .decode         = decode_frame,
-    .flush          = decode_flush,
-    .capabilities   = CODEC_CAP_DR1,
-    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
-                                                      AV_SAMPLE_FMT_NONE },
-};