[FFmpeg-devel] [PATCH 1/5] avcodec: add ADPCM IMA MOFLEX decoder
Paul B Mahol
onemda at gmail.com
Tue Sep 1 14:29:42 EEST 2020
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
libavcodec/Makefile | 1 +
libavcodec/adpcm.c | 26 ++++++++++++++++++++++++++
libavcodec/allcodecs.c | 1 +
libavcodec/codec_desc.c | 7 +++++++
libavcodec/codec_id.h | 1 +
libavcodec/utils.c | 2 ++
6 files changed, 38 insertions(+)
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index ca2e8a2530..191c4e0a7c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -866,6 +866,7 @@ OBJS-$(CONFIG_ADPCM_IMA_DK4_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_EA_EACS_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_EA_SEAD_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_ISS_DECODER) += adpcm.o adpcm_data.o
+OBJS-$(CONFIG_ADPCM_IMA_MOFLEX_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_MTF_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_OKI_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_QT_DECODER) += adpcm.o adpcm_data.o
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 1366932352..71e37efde7 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -210,6 +210,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
case AV_CODEC_ID_ADPCM_PSX:
case AV_CODEC_ID_ADPCM_MTAF:
case AV_CODEC_ID_ADPCM_ARGO:
+ case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
break;
case AV_CODEC_ID_ADPCM_IMA_WS:
@@ -774,6 +775,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
case AV_CODEC_ID_ADPCM_4XM:
case AV_CODEC_ID_ADPCM_AGM:
case AV_CODEC_ID_ADPCM_IMA_DAT4:
+ case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
@@ -1298,6 +1300,29 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
*samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
}
break;
+ case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
+ for (channel = 0; channel < avctx->channels; channel++) {
+ cs = &c->status[channel];
+ cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
+ cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
+ if (cs->step_index > 88u){
+ av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
+ channel, cs->step_index);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ for (int subframe = 0; subframe < nb_samples / 256; subframe++) {
+ for (channel = 0; channel < avctx->channels; channel++) {
+ samples = samples_p[channel] + 256 * subframe;
+ for (n = 0; n < 256; n += 2) {
+ int v = bytestream2_get_byteu(&gb);
+ *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
+ *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
+ }
+ }
+ }
+ break;
case AV_CODEC_ID_ADPCM_IMA_DAT4:
for (channel = 0; channel < avctx->channels; channel++) {
cs = &c->status[channel];
@@ -2107,6 +2132,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4,
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
+ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 729d2fd9ad..084a289c9e 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -619,6 +619,7 @@ extern AVCodec ff_adpcm_ima_dk4_decoder;
extern AVCodec ff_adpcm_ima_ea_eacs_decoder;
extern AVCodec ff_adpcm_ima_ea_sead_decoder;
extern AVCodec ff_adpcm_ima_iss_decoder;
+extern AVCodec ff_adpcm_ima_moflex_decoder;
extern AVCodec ff_adpcm_ima_mtf_decoder;
extern AVCodec ff_adpcm_ima_oki_decoder;
extern AVCodec ff_adpcm_ima_qt_encoder;
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 0ae6aee63b..b5bc5c3c71 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -2376,6 +2376,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA Cunning Developments"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_ADPCM_IMA_MOFLEX,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "adpcm_ima_moflex",
+ .long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA MobiClip MOFLEX"),
+ .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
+ },
/* AMR */
{
diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
index 896ecb0ce0..aac1174f28 100644
--- a/libavcodec/codec_id.h
+++ b/libavcodec/codec_id.h
@@ -388,6 +388,7 @@ enum AVCodecID {
AV_CODEC_ID_ADPCM_IMA_ALP,
AV_CODEC_ID_ADPCM_IMA_MTF,
AV_CODEC_ID_ADPCM_IMA_CUNNING,
+ AV_CODEC_ID_ADPCM_IMA_MOFLEX,
/* AMR */
AV_CODEC_ID_AMR_NB = 0x12000,
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 14cb5cf1aa..187ce230b8 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1664,6 +1664,8 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
if (ch > 0 && ch < INT_MAX/16) {
/* calc from frame_bytes and channels */
switch (id) {
+ case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
+ return (frame_bytes - 4 * ch) / (128 * ch) * 256;
case AV_CODEC_ID_ADPCM_AFC:
return frame_bytes / (9 * ch) * 16;
case AV_CODEC_ID_ADPCM_PSX:
--
2.17.1
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