* Copyright (c) 2003 Nick Kurshev
* Based on public domain decoder at http://www.honeypot.net/audio
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "get_bits.h"
#include "ra144.h"
-#include "celp_filters.h"
static av_cold int ra144_decode_init(AVCodecContext * avctx)
ractx->lpc_coef[0] = ractx->lpc_tables[0];
ractx->lpc_coef[1] = ractx->lpc_tables[1];
- avctx->sample_fmt = SAMPLE_FMT_S16;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+ avcodec_get_frame_defaults(&ractx->frame);
+ avctx->coded_frame = &ractx->frame;
+
return 0;
}
static void do_output_subblock(RA144Context *ractx, const uint16_t *lpc_coefs,
int gval, GetBitContext *gb)
{
- uint16_t buffer_a[40];
- uint16_t *block;
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);
- int m[3];
-
- if (cba_idx) {
- cba_idx += BLOCKSIZE/2 - 1;
- ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx);
- m[0] = (ff_irms(buffer_a) * gval) >> 12;
- } else {
- m[0] = 0;
- }
-
- m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8;
- m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8;
-
- memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE,
- (BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb));
-
- block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
- ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL,
- ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]);
-
- memcpy(ractx->curr_sblock, ractx->curr_sblock + 40,
- 10*sizeof(*ractx->curr_sblock));
-
- if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs,
- block, BLOCKSIZE, 10, 1, 0xfff))
- memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock));
+ 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 *vdata,
- int *data_size, AVPacket *avpkt)
+static int ra144_decode_frame(AVCodecContext * avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- static const uint8_t sizes[10] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2};
- unsigned int refl_rms[4]; // RMS of the reflection coefficients
- uint16_t block_coefs[4][10]; // LPC coefficients of each sub-block
- unsigned int lpc_refl[10]; // LPC reflection coefficients of the frame
+ 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
+ uint16_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;
- int16_t *data = vdata;
+ int ret;
+ int16_t *samples;
unsigned int energy;
RA144Context *ractx = avctx->priv_data;
GetBitContext gb;
- if (*data_size < 2*160)
- return -1;
+ /* get output buffer */
+ ractx->frame.nb_samples = NBLOCKS * BLOCKSIZE;
+ if ((ret = avctx->get_buffer(avctx, &ractx->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples = (int16_t *)ractx->frame.data[0];
- if(buf_size < 20) {
+ if(buf_size < FRAMESIZE) {
av_log(avctx, AV_LOG_ERROR,
"Frame too small (%d bytes). Truncated file?\n", buf_size);
- *data_size = 0;
+ *got_frame_ptr = 0;
return buf_size;
}
- init_get_bits(&gb, buf, 20 * 8);
+ init_get_bits(&gb, buf, FRAMESIZE * 8);
- for (i=0; i<10; i++)
+ 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);
ff_int_to_int16(block_coefs[3], ractx->lpc_coef[0]);
- for (i=0; i < 4; i++) {
+ for (i=0; i < NBLOCKS; i++) {
do_output_subblock(ractx, block_coefs[i], refl_rms[i], &gb);
for (j=0; j < BLOCKSIZE; j++)
- *data++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2);
+ *samples++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2);
}
ractx->old_energy = energy;
FFSWAP(unsigned int *, ractx->lpc_coef[0], ractx->lpc_coef[1]);
- *data_size = 2*160;
- return 20;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = ractx->frame;
+
+ return FRAMESIZE;
}
-AVCodec ra_144_decoder =
-{
- "real_144",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_RA_144,
- sizeof(RA144Context),
- ra144_decode_init,
- NULL,
- NULL,
- ra144_decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),
+AVCodec ff_ra_144_decoder = {
+ .name = "real_144",
+ .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,
+ .long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),
};
projects / ffmpeg / blobdiff