/*
* Copyright (c) 2001-2003 The ffmpeg Project
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define FREEZE_INTERVAL 128
+static av_cold int adpcm_encode_close(AVCodecContext *avctx);
+
static av_cold int adpcm_encode_init(AVCodecContext *avctx)
{
ADPCMEncodeContext *s = avctx->priv_data;
/* seems frame_size isn't taken into account...
have to buffer the samples :-( */
avctx->block_align = BLKSIZE;
+ avctx->bits_per_coded_sample = 4;
break;
case AV_CODEC_ID_ADPCM_IMA_QT:
avctx->frame_size = 64;
case AV_CODEC_ID_ADPCM_MS:
/* each 16 bits sample gives one nibble
and we have 7 bytes per channel overhead */
- avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 /
- avctx->channels + 2;
+ avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 / avctx->channels + 2;
+ avctx->bits_per_coded_sample = 4;
avctx->block_align = BLKSIZE;
if (!(avctx->extradata = av_malloc(32 + FF_INPUT_BUFFER_PADDING_SIZE)))
goto error;
return 0;
error:
- av_freep(&s->paths);
- av_freep(&s->node_buf);
- av_freep(&s->nodep_buf);
- av_freep(&s->trellis_hash);
+ adpcm_encode_close(avctx);
return ret;
}
int16_t sample)
{
int delta = sample - c->prev_sample;
- int mask, step = ff_adpcm_step_table[c->step_index];
- int diff = step >> 3;
- int nibble = 0;
+ int diff, step = ff_adpcm_step_table[c->step_index];
+ int nibble = 8*(delta < 0);
- if (delta < 0) {
- nibble = 8;
- delta = -delta;
- }
+ delta= abs(delta);
+ diff = delta + (step >> 3);
- for (mask = 4; mask;) {
- if (delta >= step) {
- nibble |= mask;
- delta -= step;
- diff += step;
- }
- step >>= 1;
- mask >>= 1;
+ if (delta >= step) {
+ nibble |= 4;
+ delta -= step;
+ }
+ step >>= 1;
+ if (delta >= step) {
+ nibble |= 2;
+ delta -= step;
}
+ step >>= 1;
+ if (delta >= step) {
+ nibble |= 1;
+ delta -= step;
+ }
+ diff -= delta;
if (nibble & 8)
c->prev_sample -= diff;
pkt_size = (2 + avctx->channels * (22 + 4 * (frame->nb_samples - 1)) + 7) / 8;
else
pkt_size = avctx->block_align;
- if ((ret = ff_alloc_packet(avpkt, pkt_size))) {
- av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+ if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size)))
return ret;
- }
dst = avpkt->data;
switch(avctx->codec->id) {
init_put_bits(&pb, dst, pkt_size * 8);
for (ch = 0; ch < avctx->channels; ch++) {
- put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7);
+ put_bits(&pb, 9, (c->status[ch].prev_sample & 0xFFFF) >> 7);
put_bits(&pb, 7, c->status[ch].step_index);
if (avctx->trellis > 0) {
uint8_t buf[64];