* TwinVQ decoder
* Copyright (c) 2009 Vitor Sessak
*
- * 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
*/
typedef struct TwinContext {
AVCodecContext *avctx;
+ AVFrame frame;
DSPContext dsp;
FFTContext mdct_ctx[3];
float *curr_frame; ///< non-interleaved output
float *prev_frame; ///< non-interleaved previous frame
int last_block_pos[2];
+ int discarded_packets;
float *cos_tabs[3];
i);
}
+ if (!out)
+ return;
+
size2 = tctx->last_block_pos[0];
size1 = mtab->size - size2;
if (tctx->avctx->channels == 2) {
}
static int twin_decode_frame(AVCodecContext * avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
TwinContext *tctx = avctx->priv_data;
GetBitContext gb;
const ModeTab *mtab = tctx->mtab;
- float *out = data;
+ float *out = NULL;
enum FrameType ftype;
- int window_type, out_size;
+ int window_type, ret;
static const enum FrameType wtype_to_ftype_table[] = {
FT_LONG, FT_LONG, FT_SHORT, FT_LONG,
FT_MEDIUM, FT_LONG, FT_LONG, FT_MEDIUM, FT_MEDIUM
return AVERROR(EINVAL);
}
- out_size = mtab->size * avctx->channels *
- av_get_bytes_per_sample(avctx->sample_fmt);
- if (*data_size < out_size) {
- av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
- return AVERROR(EINVAL);
+ /* get output buffer */
+ if (tctx->discarded_packets >= 2) {
+ tctx->frame.nb_samples = mtab->size;
+ if ((ret = avctx->get_buffer(avctx, &tctx->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ out = (float *)tctx->frame.data[0];
}
init_get_bits(&gb, buf, buf_size * 8);
FFSWAP(float*, tctx->curr_frame, tctx->prev_frame);
- if (tctx->avctx->frame_number < 2) {
- *data_size=0;
+ if (tctx->discarded_packets < 2) {
+ tctx->discarded_packets++;
+ *got_frame_ptr = 0;
return buf_size;
}
- *data_size = out_size;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = tctx->frame;;
return buf_size;
}
memset_float(tctx->bark_hist[0][0], 0.1, FF_ARRAY_ELEMS(tctx->bark_hist));
+ avcodec_get_frame_defaults(&tctx->frame);
+ avctx->coded_frame = &tctx->frame;
+
return 0;
}
.init = twin_decode_init,
.close = twin_decode_close,
.decode = twin_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("VQF TwinVQ"),
};