making act segmenter

1 files changed, 0 insertions, 628 deletions

diff --git a/ffmpeg1/libavcodec/alac.c b/ffmpeg1/libavcodec/alac.c
deleted file mode 100644
index 0018b9a..0000000
--- a/ffmpeg1/libavcodec/alac.c
+++ /dev/null
@@ -1,628 +0,0 @@
-/*
- * ALAC (Apple Lossless Audio Codec) decoder
- * Copyright (c) 2005 David Hammerton
- *
- * 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
- * ALAC (Apple Lossless Audio Codec) decoder
- * @author 2005 David Hammerton
- * @see http://crazney.net/programs/itunes/alac.html
- *
- * Note: This decoder expects a 36-byte QuickTime atom to be
- * passed through the extradata[_size] fields. This atom is tacked onto
- * the end of an 'alac' stsd atom and has the following format:
- *
- * 32bit  atom size
- * 32bit  tag                  ("alac")
- * 32bit  tag version          (0)
- * 32bit  samples per frame    (used when not set explicitly in the frames)
- *  8bit  compatible version   (0)
- *  8bit  sample size
- *  8bit  history mult         (40)
- *  8bit  initial history      (10)
- *  8bit  rice param limit     (14)
- *  8bit  channels
- * 16bit  maxRun               (255)
- * 32bit  max coded frame size (0 means unknown)
- * 32bit  average bitrate      (0 means unknown)
- * 32bit  samplerate
- */
-
-#include "libavutil/channel_layout.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "bytestream.h"
-#include "internal.h"
-#include "unary.h"
-#include "mathops.h"
-#include "alac_data.h"
-
-#define ALAC_EXTRADATA_SIZE 36
-
-typedef struct {
-    AVCodecContext *avctx;
-    GetBitContext gb;
-    int channels;
-
-    int32_t *predict_error_buffer[2];
-    int32_t *output_samples_buffer[2];
-    int32_t *extra_bits_buffer[2];
-
-    uint32_t max_samples_per_frame;
-    uint8_t  sample_size;
-    uint8_t  rice_history_mult;
-    uint8_t  rice_initial_history;
-    uint8_t  rice_limit;
-
-    int extra_bits;     /**< number of extra bits beyond 16-bit */
-    int nb_samples;     /**< number of samples in the current frame */
-
-    int direct_output;
-} ALACContext;
-
-static inline unsigned int decode_scalar(GetBitContext *gb, int k, int bps)
-{
-    unsigned int x = get_unary_0_9(gb);
-
-    if (x > 8) { /* RICE THRESHOLD */
-        /* use alternative encoding */
-        x = get_bits_long(gb, bps);
-    } else if (k != 1) {
-        int extrabits = show_bits(gb, k);
-
-        /* multiply x by 2^k - 1, as part of their strange algorithm */
-        x = (x << k) - x;
-
-        if (extrabits > 1) {
-            x += extrabits - 1;
-            skip_bits(gb, k);
-        } else
-            skip_bits(gb, k - 1);
-    }
-    return x;
-}
-
-static int rice_decompress(ALACContext *alac, int32_t *output_buffer,
-                            int nb_samples, int bps, int rice_history_mult)
-{
-    int i;
-    unsigned int history = alac->rice_initial_history;
-    int sign_modifier = 0;
-
-    for (i = 0; i < nb_samples; i++) {
-        int k;
-        unsigned int x;
-
-        if(get_bits_left(&alac->gb) <= 0)
-            return -1;
-
-        /* calculate rice param and decode next value */
-        k = av_log2((history >> 9) + 3);
-        k = FFMIN(k, alac->rice_limit);
-        x = decode_scalar(&alac->gb, k, bps);
-        x += sign_modifier;
-        sign_modifier = 0;
-        output_buffer[i] = (x >> 1) ^ -(x & 1);
-
-        /* update the history */
-        if (x > 0xffff)
-            history = 0xffff;
-        else
-            history +=         x * rice_history_mult -
-                       ((history * rice_history_mult) >> 9);
-
-        /* special case: there may be compressed blocks of 0 */
-        if ((history < 128) && (i + 1 < nb_samples)) {
-            int block_size;
-
-            /* calculate rice param and decode block size */
-            k = 7 - av_log2(history) + ((history + 16) >> 6);
-            k = FFMIN(k, alac->rice_limit);
-            block_size = decode_scalar(&alac->gb, k, 16);
-
-            if (block_size > 0) {
-                if (block_size >= nb_samples - i) {
-                    av_log(alac->avctx, AV_LOG_ERROR,
-                           "invalid zero block size of %d %d %d\n", block_size,
-                           nb_samples, i);
-                    block_size = nb_samples - i - 1;
-                }
-                memset(&output_buffer[i + 1], 0,
-                       block_size * sizeof(*output_buffer));
-                i += block_size;
-            }
-            if (block_size <= 0xffff)
-                sign_modifier = 1;
-            history = 0;
-        }
-    }
-    return 0;
-}
-
-static inline int sign_only(int v)
-{
-    return v ? FFSIGN(v) : 0;
-}
-
-static void lpc_prediction(int32_t *error_buffer, int32_t *buffer_out,
-                           int nb_samples, int bps, int16_t *lpc_coefs,
-                           int lpc_order, int lpc_quant)
-{
-    int i;
-    int32_t *pred = buffer_out;
-
-    /* first sample always copies */
-    *buffer_out = *error_buffer;
-
-    if (nb_samples <= 1)
-        return;
-
-    if (!lpc_order) {
-        memcpy(&buffer_out[1], &error_buffer[1],
-               (nb_samples - 1) * sizeof(*buffer_out));
-        return;
-    }
-
-    if (lpc_order == 31) {
-        /* simple 1st-order prediction */
-        for (i = 1; i < nb_samples; i++) {
-            buffer_out[i] = sign_extend(buffer_out[i - 1] + error_buffer[i],
-                                        bps);
-        }
-        return;
-    }
-
-    /* read warm-up samples */
-    for (i = 1; i <= lpc_order && i < nb_samples; i++)
-        buffer_out[i] = sign_extend(buffer_out[i - 1] + error_buffer[i], bps);
-
-    /* NOTE: 4 and 8 are very common cases that could be optimized. */
-
-    for (; i < nb_samples; i++) {
-        int j;
-        int val = 0;
-        int error_val = error_buffer[i];
-        int error_sign;
-        int d = *pred++;
-
-        /* LPC prediction */
-        for (j = 0; j < lpc_order; j++)
-            val += (pred[j] - d) * lpc_coefs[j];
-        val = (val + (1 << (lpc_quant - 1))) >> lpc_quant;
-        val += d + error_val;
-        buffer_out[i] = sign_extend(val, bps);
-
-        /* adapt LPC coefficients */
-        error_sign = sign_only(error_val);
-        if (error_sign) {
-            for (j = 0; j < lpc_order && error_val * error_sign > 0; j++) {
-                int sign;
-                val  = d - pred[j];
-                sign = sign_only(val) * error_sign;
-                lpc_coefs[j] -= sign;
-                val *= sign;
-                error_val -= (val >> lpc_quant) * (j + 1);
-            }
-        }
-    }
-}
-
-static void decorrelate_stereo(int32_t *buffer[2], int nb_samples,
-                               int decorr_shift, int decorr_left_weight)
-{
-    int i;
-
-    for (i = 0; i < nb_samples; i++) {
-        int32_t a, b;
-
-        a = buffer[0][i];
-        b = buffer[1][i];
-
-        a -= (b * decorr_left_weight) >> decorr_shift;
-        b += a;
-
-        buffer[0][i] = b;
-        buffer[1][i] = a;
-    }
-}
-
-static void append_extra_bits(int32_t *buffer[2], int32_t *extra_bits_buffer[2],
-                              int extra_bits, int channels, int nb_samples)
-{
-    int i, ch;
-
-    for (ch = 0; ch < channels; ch++)
-        for (i = 0; i < nb_samples; i++)
-            buffer[ch][i] = (buffer[ch][i] << extra_bits) | extra_bits_buffer[ch][i];
-}
-
-static int decode_element(AVCodecContext *avctx, AVFrame *frame, int ch_index,
-                          int channels)
-{
-    ALACContext *alac = avctx->priv_data;
-    int has_size, bps, is_compressed, decorr_shift, decorr_left_weight, ret;
-    uint32_t output_samples;
-    int i, ch;
-
-    skip_bits(&alac->gb, 4);  /* element instance tag */
-    skip_bits(&alac->gb, 12); /* unused header bits */
-
-    /* the number of output samples is stored in the frame */
-    has_size = get_bits1(&alac->gb);
-
-    alac->extra_bits = get_bits(&alac->gb, 2) << 3;
-    bps = alac->sample_size - alac->extra_bits + channels - 1;
-    if (bps > 32U) {
-        av_log(avctx, AV_LOG_ERROR, "bps is unsupported: %d\n", bps);
-        return AVERROR_PATCHWELCOME;
-    }
-
-    /* whether the frame is compressed */
-    is_compressed = !get_bits1(&alac->gb);
-
-    if (has_size)
-        output_samples = get_bits_long(&alac->gb, 32);
-    else
-        output_samples = alac->max_samples_per_frame;
-    if (!output_samples || output_samples > alac->max_samples_per_frame) {
-        av_log(avctx, AV_LOG_ERROR, "invalid samples per frame: %d\n",
-               output_samples);
-        return AVERROR_INVALIDDATA;
-    }
-    if (!alac->nb_samples) {
-        /* get output buffer */
-        frame->nb_samples = output_samples;
-        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
-            return ret;
-    } else if (output_samples != alac->nb_samples) {
-        av_log(avctx, AV_LOG_ERROR, "sample count mismatch: %u != %d\n",
-               output_samples, alac->nb_samples);
-        return AVERROR_INVALIDDATA;
-    }
-    alac->nb_samples = output_samples;
-    if (alac->direct_output) {
-        for (ch = 0; ch < channels; ch++)
-            alac->output_samples_buffer[ch] = (int32_t *)frame->extended_data[ch_index + ch];
-    }
-
-    if (is_compressed) {
-        int16_t lpc_coefs[2][32];
-        int lpc_order[2];
-        int prediction_type[2];
-        int lpc_quant[2];
-        int rice_history_mult[2];
-
-        decorr_shift       = get_bits(&alac->gb, 8);
-        decorr_left_weight = get_bits(&alac->gb, 8);
-
-        for (ch = 0; ch < channels; ch++) {
-            prediction_type[ch]   = get_bits(&alac->gb, 4);
-            lpc_quant[ch]         = get_bits(&alac->gb, 4);
-            rice_history_mult[ch] = get_bits(&alac->gb, 3);
-            lpc_order[ch]         = get_bits(&alac->gb, 5);
-
-            /* read the predictor table */
-            for (i = lpc_order[ch] - 1; i >= 0; i--)
-                lpc_coefs[ch][i] = get_sbits(&alac->gb, 16);
-        }
-
-        if (alac->extra_bits) {
-            for (i = 0; i < alac->nb_samples; i++) {
-                if(get_bits_left(&alac->gb) <= 0)
-                    return -1;
-                for (ch = 0; ch < channels; ch++)
-                    alac->extra_bits_buffer[ch][i] = get_bits(&alac->gb, alac->extra_bits);
-            }
-        }
-        for (ch = 0; ch < channels; ch++) {
-            int ret=rice_decompress(alac, alac->predict_error_buffer[ch],
-                            alac->nb_samples, bps,
-                            rice_history_mult[ch] * alac->rice_history_mult / 4);
-            if(ret<0)
-                return ret;
-
-            /* adaptive FIR filter */
-            if (prediction_type[ch] == 15) {
-                /* Prediction type 15 runs the adaptive FIR twice.
-                 * The first pass uses the special-case coef_num = 31, while
-                 * the second pass uses the coefs from the bitstream.
-                 *
-                 * However, this prediction type is not currently used by the
-                 * reference encoder.
-                 */
-                lpc_prediction(alac->predict_error_buffer[ch],
-                               alac->predict_error_buffer[ch],
-                               alac->nb_samples, bps, NULL, 31, 0);
-            } else if (prediction_type[ch] > 0) {
-                av_log(avctx, AV_LOG_WARNING, "unknown prediction type: %i\n",
-                       prediction_type[ch]);
-            }
-            lpc_prediction(alac->predict_error_buffer[ch],
-                           alac->output_samples_buffer[ch], alac->nb_samples,
-                           bps, lpc_coefs[ch], lpc_order[ch], lpc_quant[ch]);
-        }
-    } else {
-        /* not compressed, easy case */
-        for (i = 0; i < alac->nb_samples; i++) {
-            if(get_bits_left(&alac->gb) <= 0)
-                return -1;
-            for (ch = 0; ch < channels; ch++) {
-                alac->output_samples_buffer[ch][i] =
-                         get_sbits_long(&alac->gb, alac->sample_size);
-            }
-        }
-        alac->extra_bits   = 0;
-        decorr_shift       = 0;
-        decorr_left_weight = 0;
-    }
-
-    if (channels == 2 && decorr_left_weight) {
-        decorrelate_stereo(alac->output_samples_buffer, alac->nb_samples,
-                           decorr_shift, decorr_left_weight);
-    }
-
-    if (alac->extra_bits) {
-        append_extra_bits(alac->output_samples_buffer, alac->extra_bits_buffer,
-                          alac->extra_bits, channels, alac->nb_samples);
-    }
-
-    if(av_sample_fmt_is_planar(avctx->sample_fmt)) {
-    switch(alac->sample_size) {
-    case 16: {
-        for (ch = 0; ch < channels; ch++) {
-            int16_t *outbuffer = (int16_t *)frame->extended_data[ch_index + ch];
-            for (i = 0; i < alac->nb_samples; i++)
-                *outbuffer++ = alac->output_samples_buffer[ch][i];
-        }}
-        break;
-    case 24: {
-        for (ch = 0; ch < channels; ch++) {
-            for (i = 0; i < alac->nb_samples; i++)
-                alac->output_samples_buffer[ch][i] <<= 8;
-        }}
-        break;
-    }
-    }else{
-        switch(alac->sample_size) {
-        case 16: {
-            int16_t *outbuffer = ((int16_t *)frame->extended_data[0]) + ch_index;
-            for (i = 0; i < alac->nb_samples; i++) {
-                for (ch = 0; ch < channels; ch++)
-                    *outbuffer++ = alac->output_samples_buffer[ch][i];
-                outbuffer += alac->channels - channels;
-            }
-            }
-            break;
-        case 24: {
-            int32_t *outbuffer = ((int32_t *)frame->extended_data[0]) + ch_index;
-            for (i = 0; i < alac->nb_samples; i++) {
-                for (ch = 0; ch < channels; ch++)
-                    *outbuffer++ = alac->output_samples_buffer[ch][i] << 8;
-                outbuffer += alac->channels - channels;
-            }
-            }
-            break;
-        case 32: {
-            int32_t *outbuffer = ((int32_t *)frame->extended_data[0]) + ch_index;
-            for (i = 0; i < alac->nb_samples; i++) {
-                for (ch = 0; ch < channels; ch++)
-                    *outbuffer++ = alac->output_samples_buffer[ch][i];
-                outbuffer += alac->channels - channels;
-            }
-            }
-            break;
-        }
-    }
-
-    return 0;
-}
-
-static int alac_decode_frame(AVCodecContext *avctx, void *data,
-                             int *got_frame_ptr, AVPacket *avpkt)
-{
-    ALACContext *alac = avctx->priv_data;
-    AVFrame *frame    = data;
-    enum AlacRawDataBlockType element;
-    int channels;
-    int ch, ret, got_end;
-
-    init_get_bits(&alac->gb, avpkt->data, avpkt->size * 8);
-
-    got_end = 0;
-    alac->nb_samples = 0;
-    ch = 0;
-    while (get_bits_left(&alac->gb) >= 3) {
-        element = get_bits(&alac->gb, 3);
-        if (element == TYPE_END) {
-            got_end = 1;
-            break;
-        }
-        if (element > TYPE_CPE && element != TYPE_LFE) {
-            av_log(avctx, AV_LOG_ERROR, "syntax element unsupported: %d\n", element);
-            return AVERROR_PATCHWELCOME;
-        }
-
-        channels = (element == TYPE_CPE) ? 2 : 1;
-        if (   ch + channels > alac->channels
-            || ff_alac_channel_layout_offsets[alac->channels - 1][ch] + channels > alac->channels
-        ) {
-            av_log(avctx, AV_LOG_ERROR, "invalid element channel count\n");
-            return AVERROR_INVALIDDATA;
-        }
-
-        ret = decode_element(avctx, frame,
-                             ff_alac_channel_layout_offsets[alac->channels - 1][ch],
-                             channels);
-        if (ret < 0 && get_bits_left(&alac->gb))
-            return ret;
-
-        ch += channels;
-    }
-    if (!got_end) {
-        av_log(avctx, AV_LOG_ERROR, "no end tag found. incomplete packet.\n");
-        return AVERROR_INVALIDDATA;
-    }
-
-    if (avpkt->size * 8 - get_bits_count(&alac->gb) > 8) {
-        av_log(avctx, AV_LOG_ERROR, "Error : %d bits left\n",
-               avpkt->size * 8 - get_bits_count(&alac->gb));
-    }
-
-    *got_frame_ptr = 1;
-
-    return avpkt->size;
-}
-
-static av_cold int alac_decode_close(AVCodecContext *avctx)
-{
-    ALACContext *alac = avctx->priv_data;
-
-    int ch;
-    for (ch = 0; ch < FFMIN(alac->channels, 2); ch++) {
-        av_freep(&alac->predict_error_buffer[ch]);
-        if (!alac->direct_output)
-            av_freep(&alac->output_samples_buffer[ch]);
-        av_freep(&alac->extra_bits_buffer[ch]);
-    }
-
-    return 0;
-}
-
-static int allocate_buffers(ALACContext *alac)
-{
-    int ch;
-    int buf_size;
-
-    if (alac->max_samples_per_frame > INT_MAX / sizeof(int32_t))
-        goto buf_alloc_fail;
-    buf_size = alac->max_samples_per_frame * sizeof(int32_t);
-
-    for (ch = 0; ch < FFMIN(alac->channels, 2); ch++) {
-        FF_ALLOC_OR_GOTO(alac->avctx, alac->predict_error_buffer[ch],
-                         buf_size, buf_alloc_fail);
-
-        alac->direct_output = alac->sample_size > 16 && av_sample_fmt_is_planar(alac->avctx->sample_fmt);
-        if (!alac->direct_output) {
-            FF_ALLOC_OR_GOTO(alac->avctx, alac->output_samples_buffer[ch],
-                             buf_size, buf_alloc_fail);
-        }
-
-        FF_ALLOC_OR_GOTO(alac->avctx, alac->extra_bits_buffer[ch],
-                         buf_size, buf_alloc_fail);
-    }
-    return 0;
-buf_alloc_fail:
-    alac_decode_close(alac->avctx);
-    return AVERROR(ENOMEM);
-}
-
-static int alac_set_info(ALACContext *alac)
-{
-    GetByteContext gb;
-
-    bytestream2_init(&gb, alac->avctx->extradata,
-                     alac->avctx->extradata_size);
-
-    bytestream2_skipu(&gb, 12); // size:4, alac:4, version:4
-
-    alac->max_samples_per_frame = bytestream2_get_be32u(&gb);
-    if (!alac->max_samples_per_frame || alac->max_samples_per_frame > INT_MAX) {
-        av_log(alac->avctx, AV_LOG_ERROR, "max samples per frame invalid: %u\n",
-               alac->max_samples_per_frame);
-        return AVERROR_INVALIDDATA;
-    }
-    bytestream2_skipu(&gb, 1);  // compatible version
-    alac->sample_size          = bytestream2_get_byteu(&gb);
-    alac->rice_history_mult    = bytestream2_get_byteu(&gb);
-    alac->rice_initial_history = bytestream2_get_byteu(&gb);
-    alac->rice_limit           = bytestream2_get_byteu(&gb);
-    alac->channels             = bytestream2_get_byteu(&gb);
-    bytestream2_get_be16u(&gb); // maxRun
-    bytestream2_get_be32u(&gb); // max coded frame size
-    bytestream2_get_be32u(&gb); // average bitrate
-    bytestream2_get_be32u(&gb); // samplerate
-
-    return 0;
-}
-
-static av_cold int alac_decode_init(AVCodecContext * avctx)
-{
-    int ret;
-    int req_packed;
-    ALACContext *alac = avctx->priv_data;
-    alac->avctx = avctx;
-
-    /* initialize from the extradata */
-    if (alac->avctx->extradata_size < ALAC_EXTRADATA_SIZE) {
-        av_log(avctx, AV_LOG_ERROR, "extradata is too small\n");
-        return AVERROR_INVALIDDATA;
-    }
-    if (alac_set_info(alac)) {
-        av_log(avctx, AV_LOG_ERROR, "set_info failed\n");
-        return -1;
-    }
-
-    req_packed = LIBAVCODEC_VERSION_MAJOR < 55 && !av_sample_fmt_is_planar(avctx->request_sample_fmt);
-    switch (alac->sample_size) {
-    case 16: avctx->sample_fmt = req_packed ? AV_SAMPLE_FMT_S16 : AV_SAMPLE_FMT_S16P;
-             break;
-    case 24:
-    case 32: avctx->sample_fmt = req_packed ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S32P;
-             break;
-    default: avpriv_request_sample(avctx, "Sample depth %d", alac->sample_size);
-             return AVERROR_PATCHWELCOME;
-    }
-    avctx->bits_per_raw_sample = alac->sample_size;
-
-    if (alac->channels < 1) {
-        av_log(avctx, AV_LOG_WARNING, "Invalid channel count\n");
-        alac->channels = avctx->channels;
-    } else {
-        if (alac->channels > ALAC_MAX_CHANNELS)
-            alac->channels = avctx->channels;
-        else
-            avctx->channels = alac->channels;
-    }
-    if (avctx->channels > ALAC_MAX_CHANNELS || avctx->channels <= 0 ) {
-        av_log(avctx, AV_LOG_ERROR, "Unsupported channel count: %d\n",
-               avctx->channels);
-        return AVERROR_PATCHWELCOME;
-    }
-    avctx->channel_layout = ff_alac_channel_layouts[alac->channels - 1];
-
-    if ((ret = allocate_buffers(alac)) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Error allocating buffers\n");
-        return ret;
-    }
-
-    return 0;
-}
-
-AVCodec ff_alac_decoder = {
-    .name           = "alac",
-    .type           = AVMEDIA_TYPE_AUDIO,
-    .id             = AV_CODEC_ID_ALAC,
-    .priv_data_size = sizeof(ALACContext),
-    .init           = alac_decode_init,
-    .close          = alac_decode_close,
-    .decode         = alac_decode_frame,
-    .capabilities   = CODEC_CAP_DR1,
-    .long_name      = NULL_IF_CONFIG_SMALL("ALAC (Apple Lossless Audio Codec)"),
-};