[FFmpeg-devel] [PATCH 1/2] avcodec: add pcm_f16le and pcm_f24le decoder
Paul B Mahol
onemda at gmail.com
Tue Sep 20 00:17:19 EEST 2016
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
libavcodec/Makefile | 2 ++
libavcodec/allcodecs.c | 2 ++
libavcodec/avcodec.h | 2 ++
libavcodec/codec_desc.c | 14 ++++++++++++++
libavcodec/pcm.c | 34 ++++++++++++++++++++++++++++++++++
libavcodec/utils.c | 2 ++
6 files changed, 56 insertions(+)
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 276308b..72db88a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -655,6 +655,8 @@ OBJS-$(CONFIG_PCM_ALAW_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_ALAW_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_BLURAY_DECODER) += pcm-bluray.o
OBJS-$(CONFIG_PCM_DVD_DECODER) += pcm-dvd.o
+OBJS-$(CONFIG_PCM_F16LE_DECODER) += pcm.o
+OBJS-$(CONFIG_PCM_F24LE_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_F32BE_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_F32BE_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_F32LE_DECODER) += pcm.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index b403bf2..6acd753 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -474,6 +474,8 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (PCM_ALAW, pcm_alaw);
REGISTER_DECODER(PCM_BLURAY, pcm_bluray);
REGISTER_DECODER(PCM_DVD, pcm_dvd);
+ REGISTER_DECODER(PCM_F16LE, pcm_f16le);
+ REGISTER_DECODER(PCM_F24LE, pcm_f24le);
REGISTER_ENCDEC (PCM_F32BE, pcm_f32be);
REGISTER_ENCDEC (PCM_F32LE, pcm_f32le);
REGISTER_ENCDEC (PCM_F64BE, pcm_f64be);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index db1061d..217bb27 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -448,6 +448,8 @@ enum AVCodecID {
AV_CODEC_ID_PCM_S64LE = 0x10800,
AV_CODEC_ID_PCM_S64BE,
+ AV_CODEC_ID_PCM_F16LE,
+ AV_CODEC_ID_PCM_F24LE,
/* various ADPCM codecs */
AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 24948ca..0eebf41 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1742,6 +1742,20 @@ static const AVCodecDescriptor codec_descriptors[] = {
.props = AV_CODEC_PROP_LOSSLESS,
},
{
+ .id = AV_CODEC_ID_PCM_F16LE,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "pcm_f16le",
+ .long_name = NULL_IF_CONFIG_SMALL("PCM 16.8 floating point little-endian"),
+ .props = AV_CODEC_PROP_LOSSLESS,
+ },
+ {
+ .id = AV_CODEC_ID_PCM_F24LE,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "pcm_f24le",
+ .long_name = NULL_IF_CONFIG_SMALL("PCM 24.0 floating point little-endian"),
+ .props = AV_CODEC_PROP_LOSSLESS,
+ },
+ {
.id = AV_CODEC_ID_PCM_F32BE,
.type = AVMEDIA_TYPE_AUDIO,
.name = "pcm_f32be",
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c
index 2e8e8e7..8c326c6 100644
--- a/libavcodec/pcm.c
+++ b/libavcodec/pcm.c
@@ -25,6 +25,7 @@
*/
#include "libavutil/attributes.h"
+#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
@@ -225,6 +226,8 @@ static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
typedef struct PCMDecode {
short table[256];
+ AVFloatDSPContext *fdsp;
+ float scale;
} PCMDecode;
static av_cold int pcm_decode_init(AVCodecContext *avctx)
@@ -246,6 +249,13 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx)
for (i = 0; i < 256; i++)
s->table[i] = ulaw2linear(i);
break;
+ case AV_CODEC_ID_PCM_F16LE:
+ case AV_CODEC_ID_PCM_F24LE:
+ s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));
+ s->fdsp = avpriv_float_dsp_alloc(0);
+ if (!s->fdsp)
+ return AVERROR(ENOMEM);
+ break;
default:
break;
}
@@ -258,6 +268,15 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx)
return 0;
}
+static av_cold int pcm_decode_close(AVCodecContext *avctx)
+{
+ PCMDecode *s = avctx->priv_data;
+
+ av_freep(&s->fdsp);
+
+ return 0;
+}
+
/**
* Read PCM samples macro
* @param size Data size of native machine format
@@ -400,6 +419,8 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
break;
case AV_CODEC_ID_PCM_S32LE:
case AV_CODEC_ID_PCM_F32LE:
+ case AV_CODEC_ID_PCM_F24LE:
+ case AV_CODEC_ID_PCM_F16LE:
DECODE(32, le32, src, samples, n, 0, 0)
break;
case AV_CODEC_ID_PCM_S32LE_PLANAR:
@@ -433,6 +454,8 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
break;
case AV_CODEC_ID_PCM_F64LE:
case AV_CODEC_ID_PCM_F32LE:
+ case AV_CODEC_ID_PCM_F24LE:
+ case AV_CODEC_ID_PCM_F16LE:
case AV_CODEC_ID_PCM_S64LE:
case AV_CODEC_ID_PCM_S32LE:
case AV_CODEC_ID_PCM_S16LE:
@@ -495,6 +518,14 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
return -1;
}
+ if (avctx->codec_id == AV_CODEC_ID_PCM_F16LE ||
+ avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {
+ s->fdsp->vector_fmul_scalar((float *)frame->extended_data[0],
+ (const float *)frame->extended_data[0],
+ s->scale, FFALIGN(frame->nb_samples * avctx->channels, 4));
+ emms_c();
+ }
+
*got_frame_ptr = 1;
return buf_size;
@@ -530,6 +561,7 @@ AVCodec ff_ ## name_ ## _decoder = { \
.id = AV_CODEC_ID_ ## id_, \
.priv_data_size = sizeof(PCMDecode), \
.init = pcm_decode_init, \
+ .close = pcm_decode_close, \
.decode = pcm_decode_frame, \
.capabilities = AV_CODEC_CAP_DR1, \
.sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
@@ -549,6 +581,8 @@ AVCodec ff_ ## name_ ## _decoder = { \
/* Note: Do not forget to add new entries to the Makefile as well. */
PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
+PCM_DECODER(PCM_F16LE, AV_SAMPLE_FMT_FLT, pcm_f16le, "PCM 16.8 floating point little-endian");
+PCM_DECODER(PCM_F24LE, AV_SAMPLE_FMT_FLT, pcm_f24le, "PCM 24.0 floating point little-endian");
PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index b0345b6..c199733 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -3437,6 +3437,8 @@ int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
case AV_CODEC_ID_PCM_U32LE:
case AV_CODEC_ID_PCM_F32BE:
case AV_CODEC_ID_PCM_F32LE:
+ case AV_CODEC_ID_PCM_F24LE:
+ case AV_CODEC_ID_PCM_F16LE:
return 32;
case AV_CODEC_ID_PCM_F64BE:
case AV_CODEC_ID_PCM_F64LE:
--
2.5.0
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