---
libdcadec is found here: https://github.com/foo86/dcadec
I wrote this mostly for myself, as its lossless and quite stable, and
allows easy comparison to the state of the native decoder.
Since I got a request to share it, I figured I might just send it, may it
benefit anyone that is interested.
diff --git a/configure b/configure
index 586c26b..94f9d7b 100755
--- a/configure
+++ b/configure
@@ -210,6 +210,7 @@ External library support:
--enable-libcdio enable audio CD grabbing with libcdio [no]
--enable-libdc1394 enable IIDC-1394 grabbing using libdc1394
and libraw1394 [no]
+ --enable-libdcadec enable DCA decoding via libdcadec [no]
--enable-libfaac enable AAC encoding via libfaac [no]
--enable-libfdk-aac enable AAC de/encoding via libfdk-aac [no]
--enable-libflite enable flite (voice synthesis) support via libflite
[no]
@@ -1353,6 +1354,7 @@ EXTERNAL_LIBRARY_LIST="
libcdio
libcelt
libdc1394
+ libdcadec
libfaac
libfdk_aac
libflite
@@ -2359,6 +2361,7 @@ vc1_parser_select="mpegvideo startcode vc1_decoder"
# external libraries
libaacplus_encoder_deps="libaacplus"
libcelt_decoder_deps="libcelt"
+libdcadec_decoder_deps="libdcadec"
libfaac_encoder_deps="libfaac"
libfaac_encoder_select="audio_frame_queue"
libfdk_aac_decoder_deps="libfdk_aac"
@@ -4923,6 +4926,7 @@ enabled libcelt && require libcelt celt/celt.h
celt_decode -lcelt0 &&
{ check_lib celt/celt.h
celt_decoder_create_custom -lcelt0 ||
die "ERROR: libcelt must be installed and
version must be >= 0.11.0."; }
enabled libcaca && require_pkg_config caca caca.h caca_create_canvas
+enabled libdcadec && require libdcadec dca_context.h
dcadec_context_create -ldcadec
enabled libfaac && require2 libfaac "stdint.h faac.h"
faacEncGetVersion -lfaac
enabled libfdk_aac && require libfdk_aac fdk-aac/aacenc_lib.h
aacEncOpen -lfdk-aac
flite_libs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal
-lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish
-lflite_cmulex -lflite"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4173f88..1a0c734 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -732,6 +732,7 @@ OBJS-$(CONFIG_ELBG_FILTER) += elbg.o
# external codec libraries
OBJS-$(CONFIG_LIBAACPLUS_ENCODER) += libaacplus.o
OBJS-$(CONFIG_LIBCELT_DECODER) += libcelt_dec.o
+OBJS-$(CONFIG_LIBDCADEC_DECODER) += libdcadec.o
OBJS-$(CONFIG_LIBFAAC_ENCODER) += libfaac.o
OBJS-$(CONFIG_LIBFDK_AAC_DECODER) += libfdk-aacdec.o
OBJS-$(CONFIG_LIBFDK_AAC_ENCODER) += libfdk-aacenc.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 5194e74..bbf70a6 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -512,6 +512,7 @@ void avcodec_register_all(void)
/* external libraries */
REGISTER_DECODER(LIBCELT, libcelt);
+ REGISTER_DECODER(LIBDCADEC, libdcadec)
REGISTER_ENCODER(LIBFAAC, libfaac);
REGISTER_ENCDEC (LIBFDK_AAC, libfdk_aac);
REGISTER_ENCDEC (LIBGSM, libgsm);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index cdc8aa1..48e212f 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2851,6 +2851,7 @@ typedef struct AVCodecContext {
#define FF_PROFILE_DTS_96_24 40
#define FF_PROFILE_DTS_HD_HRA 50
#define FF_PROFILE_DTS_HD_MA 60
+#define FF_PROFILE_DTS_EXPRESS 70
#define FF_PROFILE_MPEG2_422 0
#define FF_PROFILE_MPEG2_HIGH 1
diff --git a/libavcodec/libdcadec.c b/libavcodec/libdcadec.c
new file mode 100644
index 0000000..3dc1d4d
--- /dev/null
+++ b/libavcodec/libdcadec.c
@@ -0,0 +1,168 @@
+/*
+ * libdcadec decoder wrapper
+ * Copyright (C) 2015 Hendrik Leppkes
+ *
+ * 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 <stdbool.h>
+#include <inttypes.h>
+#include <dca_context.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct DCADecContext {
+ struct dcadec_context *ctx;
+} DCADecContext;
+
+static int dcadec_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
+{
+ DCADecContext *s = avctx->priv_data;
+ AVFrame *frame = data;
+ int ret, i, k;
+ int **samples, nsamples, channel_mask, sample_rate, bits_per_sample,
profile;
+
+ if ((ret = dcadec_context_parse(s->ctx, avpkt->data, avpkt->size)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "dcadec_context_parse() failed: %d\n",
-ret);
+ return AVERROR_UNKNOWN;
+ }
+ if ((ret = dcadec_context_filter(s->ctx, &samples, &nsamples,
&channel_mask,
+ &sample_rate, &bits_per_sample,
&profile)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "dcadec_context_filter() failed: %d\n",
-ret);
+ return AVERROR_UNKNOWN;
+ }
+
+ avctx->channels = av_get_channel_layout_nb_channels(channel_mask);
+ avctx->channel_layout = channel_mask;
+ avctx->sample_rate = sample_rate;
+
+ av_assert0(bits_per_sample >= 16 && bits_per_sample <= 24);
+ if (bits_per_sample == 16)
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
+ else
+ avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
+
+ avctx->bits_per_raw_sample = bits_per_sample;
+
+ switch (profile) {
+ case DCADEC_PROFILE_DS:
+ avctx->profile = FF_PROFILE_DTS;
+ break;
+ case DCADEC_PROFILE_DS_96_24:
+ avctx->profile = FF_PROFILE_DTS_96_24;
+ break;
+ case DCADEC_PROFILE_DS_ES:
+ avctx->profile = FF_PROFILE_DTS_ES;
+ break;
+ case DCADEC_PROFILE_HD_HRA:
+ avctx->profile = FF_PROFILE_DTS_HD_HRA;
+ break;
+ case DCADEC_PROFILE_HD_MA:
+ avctx->profile = FF_PROFILE_DTS_HD_MA;
+ break;
+ case DCADEC_PROFILE_EXPRESS:
+ avctx->profile = FF_PROFILE_DTS_EXPRESS;
+ break;
+ case DCADEC_PROFILE_UNKNOWN:
+ default:
+ avctx->profile = FF_PROFILE_UNKNOWN;
+ break;
+ }
+
+ frame->nb_samples = nsamples;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ for (i = 0; i < avctx->channels; i++) {
+ if (frame->format == AV_SAMPLE_FMT_S16P) {
+ int16_t *plane = (int16_t *)frame->extended_data[i];
+ for (k = 0; k < nsamples; k++)
+ plane[k] = samples[i][k];
+ } else {
+ int32_t *plane = (int32_t *)frame->extended_data[i];
+ int shift = 32 - bits_per_sample;
+ for (k = 0; k < nsamples; k++)
+ plane[k] = samples[i][k] << shift;
+ }
+ }
+
+ *got_frame_ptr = 1;
+
+ return avpkt->size;
+}
+
+static av_cold void dcadec_flush(AVCodecContext *avctx)
+{
+ DCADecContext *s = avctx->priv_data;
+ dcadec_context_clear(s->ctx);
+}
+
+static av_cold int dcadec_close(AVCodecContext *avctx)
+{
+ DCADecContext *s = avctx->priv_data;
+
+ dcadec_context_destroy(s->ctx);
+ s->ctx = NULL;
+
+ return 0;
+}
+
+static av_cold int dcadec_init(AVCodecContext *avctx)
+{
+ DCADecContext *s = avctx->priv_data;
+
+ s->ctx = dcadec_context_create(0);
+ if (!s->ctx)
+ return AVERROR(ENOMEM);
+
+ avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
+ avctx->bits_per_raw_sample = 24;
+
+ return 0;
+}
+
+static const AVProfile profiles[] = {
+ { FF_PROFILE_DTS, "DTS" },
+ { FF_PROFILE_DTS_ES, "DTS-ES" },
+ { FF_PROFILE_DTS_96_24, "DTS 96/24" },
+ { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" },
+ { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" },
+ { FF_PROFILE_DTS_EXPRESS, "DTS Express" },
+ { FF_PROFILE_UNKNOWN },
+};
+
+AVCodec ff_libdcadec_decoder = {
+ .name = "libdcadec",
+ .long_name = NULL_IF_CONFIG_SMALL("dcadec DCA decoder"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_DTS,
+ .priv_data_size = sizeof(DCADecContext),
+ .init = dcadec_init,
+ .decode = dcadec_decode_frame,
+ .close = dcadec_close,
+ .flush = dcadec_flush,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_CHANNEL_CONF,
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S32P,
AV_SAMPLE_FMT_S16P,
+ AV_SAMPLE_FMT_NONE },
+ .profiles = NULL_IF_CONFIG_SMALL(profiles),
+};
--
1.9.5.msysgit.0
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
