diff options
| author | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2014-02-17 13:36:38 +0000 |
| commit | 22e28216336da876e1fd17f380ce42eaf1446769 (patch) | |
| tree | 444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavcodec/nellymoserdec.c | |
| parent | ae5e8541f6e06e64c28719467cdf366ac57aff31 (diff) | |
chasing indexing error
Diffstat (limited to 'ffmpeg/libavcodec/nellymoserdec.c')
| -rw-r--r-- | ffmpeg/libavcodec/nellymoserdec.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/ffmpeg/libavcodec/nellymoserdec.c b/ffmpeg/libavcodec/nellymoserdec.c deleted file mode 100644 index ef16fd6..0000000 --- a/ffmpeg/libavcodec/nellymoserdec.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * NellyMoser audio decoder - * Copyright (c) 2007 a840bda5870ba11f19698ff6eb9581dfb0f95fa5, - * 539459aeb7d425140b62a3ec7dbf6dc8e408a306, and - * 520e17cd55896441042b14df2566a6eb610ed444 - * Copyright (c) 2007 Loic Minier <lool at dooz.org> - * Benjamin Larsson - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - */ - -/** - * @file - * The 3 alphanumeric copyright notices are md5summed they are from the original - * implementors. The original code is available from http://code.google.com/p/nelly2pcm/ - */ - -#include "libavutil/channel_layout.h" -#include "libavutil/float_dsp.h" -#include "libavutil/lfg.h" -#include "libavutil/random_seed.h" -#include "avcodec.h" -#include "fft.h" -#include "fmtconvert.h" -#include "internal.h" -#include "nellymoser.h" -#include "sinewin.h" - -#define BITSTREAM_READER_LE -#include "get_bits.h" - - -typedef struct NellyMoserDecodeContext { - AVCodecContext* avctx; - AVLFG random_state; - GetBitContext gb; - float scale_bias; - AVFloatDSPContext fdsp; - FFTContext imdct_ctx; - DECLARE_ALIGNED(32, float, imdct_buf)[2][NELLY_BUF_LEN]; - float *imdct_out; - float *imdct_prev; -} NellyMoserDecodeContext; - -static void nelly_decode_block(NellyMoserDecodeContext *s, - const unsigned char block[NELLY_BLOCK_LEN], - float audio[NELLY_SAMPLES]) -{ - int i,j; - float buf[NELLY_FILL_LEN], pows[NELLY_FILL_LEN]; - float *aptr, *bptr, *pptr, val, pval; - int bits[NELLY_BUF_LEN]; - unsigned char v; - - init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8); - - bptr = buf; - pptr = pows; - val = ff_nelly_init_table[get_bits(&s->gb, 6)]; - for (i=0 ; i<NELLY_BANDS ; i++) { - if (i > 0) - val += ff_nelly_delta_table[get_bits(&s->gb, 5)]; - pval = -pow(2, val/2048) * s->scale_bias; - for (j = 0; j < ff_nelly_band_sizes_table[i]; j++) { - *bptr++ = val; - *pptr++ = pval; - } - - } - - ff_nelly_get_sample_bits(buf, bits); - - for (i = 0; i < 2; i++) { - aptr = audio + i * NELLY_BUF_LEN; - - init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8); - skip_bits_long(&s->gb, NELLY_HEADER_BITS + i*NELLY_DETAIL_BITS); - - for (j = 0; j < NELLY_FILL_LEN; j++) { - if (bits[j] <= 0) { - aptr[j] = M_SQRT1_2*pows[j]; - if (av_lfg_get(&s->random_state) & 1) - aptr[j] *= -1.0; - } else { - v = get_bits(&s->gb, bits[j]); - aptr[j] = ff_nelly_dequantization_table[(1<<bits[j])-1+v]*pows[j]; - } - } - memset(&aptr[NELLY_FILL_LEN], 0, - (NELLY_BUF_LEN - NELLY_FILL_LEN) * sizeof(float)); - - s->imdct_ctx.imdct_half(&s->imdct_ctx, s->imdct_out, aptr); - s->fdsp.vector_fmul_window(aptr, s->imdct_prev + NELLY_BUF_LEN / 2, - s->imdct_out, ff_sine_128, - NELLY_BUF_LEN / 2); - FFSWAP(float *, s->imdct_out, s->imdct_prev); - } -} - -static av_cold int decode_init(AVCodecContext * avctx) { - NellyMoserDecodeContext *s = avctx->priv_data; - - s->avctx = avctx; - s->imdct_out = s->imdct_buf[0]; - s->imdct_prev = s->imdct_buf[1]; - av_lfg_init(&s->random_state, 0); - ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0); - - avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); - - s->scale_bias = 1.0/(32768*8); - avctx->sample_fmt = AV_SAMPLE_FMT_FLT; - - /* Generate overlap window */ - if (!ff_sine_128[127]) - ff_init_ff_sine_windows(7); - - avctx->channels = 1; - avctx->channel_layout = AV_CH_LAYOUT_MONO; - - return 0; -} - -static int decode_tag(AVCodecContext *avctx, void *data, - int *got_frame_ptr, AVPacket *avpkt) -{ - AVFrame *frame = data; - const uint8_t *buf = avpkt->data; - const uint8_t *side=av_packet_get_side_data(avpkt, 'F', NULL); - int buf_size = avpkt->size; - NellyMoserDecodeContext *s = avctx->priv_data; - int blocks, i, ret; - float *samples_flt; - - blocks = buf_size / NELLY_BLOCK_LEN; - - if (blocks <= 0) { - av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); - return AVERROR_INVALIDDATA; - } - - if (buf_size % NELLY_BLOCK_LEN) { - av_log(avctx, AV_LOG_WARNING, "Leftover bytes: %d.\n", - buf_size % NELLY_BLOCK_LEN); - } - /* Normal numbers of blocks for sample rates: - * 8000 Hz - 1 - * 11025 Hz - 2 - * 16000 Hz - 3 - * 22050 Hz - 4 - * 44100 Hz - 8 - */ - if(side && blocks>1 && avctx->sample_rate%11025==0 && (1<<((side[0]>>2)&3)) == blocks) - avctx->sample_rate= 11025*(blocks/2); - - /* get output buffer */ - frame->nb_samples = NELLY_SAMPLES * blocks; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) - return ret; - samples_flt = (float *)frame->data[0]; - - for (i=0 ; i<blocks ; i++) { - nelly_decode_block(s, buf, samples_flt); - samples_flt += NELLY_SAMPLES; - buf += NELLY_BLOCK_LEN; - } - - *got_frame_ptr = 1; - - return buf_size; -} - -static av_cold int decode_end(AVCodecContext * avctx) { - NellyMoserDecodeContext *s = avctx->priv_data; - - ff_mdct_end(&s->imdct_ctx); - - return 0; -} - -AVCodec ff_nellymoser_decoder = { - .name = "nellymoser", - .long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"), - .type = AVMEDIA_TYPE_AUDIO, - .id = AV_CODEC_ID_NELLYMOSER, - .priv_data_size = sizeof(NellyMoserDecodeContext), - .init = decode_init, - .close = decode_end, - .decode = decode_tag, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE, - .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT, - AV_SAMPLE_FMT_NONE }, -}; |
