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/ra144dec.c | |
| parent | ae5e8541f6e06e64c28719467cdf366ac57aff31 (diff) | |
chasing indexing error
Diffstat (limited to 'ffmpeg/libavcodec/ra144dec.c')
| -rw-r--r-- | ffmpeg/libavcodec/ra144dec.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/ffmpeg/libavcodec/ra144dec.c b/ffmpeg/libavcodec/ra144dec.c deleted file mode 100644 index b7add7f..0000000 --- a/ffmpeg/libavcodec/ra144dec.c +++ /dev/null @@ -1,137 +0,0 @@ -/* - * Real Audio 1.0 (14.4K) - * - * Copyright (c) 2008 Vitor Sessak - * Copyright (c) 2003 Nick Kurshev - * Based on public domain decoder at http://www.honeypot.net/audio - * - * 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/channel_layout.h" -#include "avcodec.h" -#include "get_bits.h" -#include "internal.h" -#include "ra144.h" - - -static av_cold int ra144_decode_init(AVCodecContext * avctx) -{ - RA144Context *ractx = avctx->priv_data; - - ractx->avctx = avctx; - - ractx->lpc_coef[0] = ractx->lpc_tables[0]; - ractx->lpc_coef[1] = ractx->lpc_tables[1]; - - avctx->channels = 1; - avctx->channel_layout = AV_CH_LAYOUT_MONO; - avctx->sample_fmt = AV_SAMPLE_FMT_S16; - - return 0; -} - -static void do_output_subblock(RA144Context *ractx, const int16_t *lpc_coefs, - int gval, GetBitContext *gb) -{ - int cba_idx = get_bits(gb, 7); // index of the adaptive CB, 0 if none - int gain = get_bits(gb, 8); - int cb1_idx = get_bits(gb, 7); - int cb2_idx = get_bits(gb, 7); - - ff_subblock_synthesis(ractx, lpc_coefs, cba_idx, cb1_idx, cb2_idx, gval, - gain); -} - -/** Uncompress one block (20 bytes -> 160*2 bytes). */ -static int ra144_decode_frame(AVCodecContext * avctx, void *data, - int *got_frame_ptr, AVPacket *avpkt) -{ - AVFrame *frame = data; - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - static const uint8_t sizes[LPC_ORDER] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2}; - unsigned int refl_rms[NBLOCKS]; // RMS of the reflection coefficients - int16_t block_coefs[NBLOCKS][LPC_ORDER]; // LPC coefficients of each sub-block - unsigned int lpc_refl[LPC_ORDER]; // LPC reflection coefficients of the frame - int i, j; - int ret; - int16_t *samples; - unsigned int energy; - - RA144Context *ractx = avctx->priv_data; - GetBitContext gb; - - if (buf_size < FRAME_SIZE) { - av_log(avctx, AV_LOG_ERROR, - "Frame too small (%d bytes). Truncated file?\n", buf_size); - *got_frame_ptr = 0; - return AVERROR_INVALIDDATA; - } - - /* get output buffer */ - frame->nb_samples = NBLOCKS * BLOCKSIZE; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) - return ret; - samples = (int16_t *)frame->data[0]; - - init_get_bits8(&gb, buf, FRAME_SIZE); - - for (i = 0; i < LPC_ORDER; i++) - lpc_refl[i] = ff_lpc_refl_cb[i][get_bits(&gb, sizes[i])]; - - ff_eval_coefs(ractx->lpc_coef[0], lpc_refl); - ractx->lpc_refl_rms[0] = ff_rms(lpc_refl); - - energy = ff_energy_tab[get_bits(&gb, 5)]; - - refl_rms[0] = ff_interp(ractx, block_coefs[0], 1, 1, ractx->old_energy); - refl_rms[1] = ff_interp(ractx, block_coefs[1], 2, - energy <= ractx->old_energy, - ff_t_sqrt(energy*ractx->old_energy) >> 12); - refl_rms[2] = ff_interp(ractx, block_coefs[2], 3, 0, energy); - refl_rms[3] = ff_rescale_rms(ractx->lpc_refl_rms[0], energy); - - ff_int_to_int16(block_coefs[3], ractx->lpc_coef[0]); - - for (i=0; i < NBLOCKS; i++) { - do_output_subblock(ractx, block_coefs[i], refl_rms[i], &gb); - - for (j=0; j < BLOCKSIZE; j++) - *samples++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2); - } - - ractx->old_energy = energy; - ractx->lpc_refl_rms[1] = ractx->lpc_refl_rms[0]; - - FFSWAP(unsigned int *, ractx->lpc_coef[0], ractx->lpc_coef[1]); - - *got_frame_ptr = 1; - - return FRAME_SIZE; -} - -AVCodec ff_ra_144_decoder = { - .name = "real_144", - .long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"), - .type = AVMEDIA_TYPE_AUDIO, - .id = AV_CODEC_ID_RA_144, - .priv_data_size = sizeof(RA144Context), - .init = ra144_decode_init, - .decode = ra144_decode_frame, - .capabilities = CODEC_CAP_DR1, -}; |
