[FFmpeg-devel] [PATCH v4 3/6] avcodec: add adpcm_ima_apm encoder
Zane van Iperen
zane at zanevaniperen.com
Sat Jun 20 13:59:33 EEST 2020
Signed-off-by: Zane van Iperen <zane at zanevaniperen.com>
---
doc/general.texi | 2 +-
libavcodec/Makefile | 1 +
libavcodec/adpcmenc.c | 34 ++++++++++++++++++++++++++++++++--
libavcodec/allcodecs.c | 1 +
libavcodec/utils.c | 1 +
5 files changed, 36 insertions(+), 3 deletions(-)
diff --git a/doc/general.texi b/doc/general.texi
index 9b0ee96752..8df7445c36 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -1109,7 +1109,7 @@ following image formats are supported:
@item ADPCM IMA High Voltage Software ALP @tab @tab X
@item ADPCM IMA QuickTime @tab X @tab X
@item ADPCM IMA Simon & Schuster Interactive @tab X @tab X
- at item ADPCM IMA Ubisoft APM @tab @tab X
+ at item ADPCM IMA Ubisoft APM @tab X @tab X
@item ADPCM IMA Loki SDL MJPEG @tab @tab X
@item ADPCM IMA WAV @tab X @tab X
@item ADPCM IMA Westwood @tab @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 5a6ea59715..4ee0bf2d4c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -853,6 +853,7 @@ OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_ALP_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_APC_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_APM_DECODER) += adpcm.o adpcm_data.o
+OBJS-$(CONFIG_ADPCM_IMA_APM_ENCODER) += adpcmenc.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_CUNNING_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_DAT4_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_DK3_DECODER) += adpcm.o adpcm_data.o
diff --git a/libavcodec/adpcmenc.c b/libavcodec/adpcmenc.c
index 1fe1aef6f5..e15fcc5768 100644
--- a/libavcodec/adpcmenc.c
+++ b/libavcodec/adpcmenc.c
@@ -76,7 +76,9 @@ static av_cold int adpcm_encode_init(AVCodecContext *avctx)
return AVERROR(EINVAL);
}
- if (avctx->trellis && avctx->codec->id == AV_CODEC_ID_ADPCM_IMA_SSI) {
+ if (avctx->trellis &&
+ (avctx->codec->id == AV_CODEC_ID_ADPCM_IMA_SSI ||
+ avctx->codec->id == AV_CODEC_ID_ADPCM_IMA_APM)) {
/*
* The current trellis implementation doesn't work for extended
* runs of samples without periodic resets. Disallow it.
@@ -147,6 +149,14 @@ static av_cold int adpcm_encode_init(AVCodecContext *avctx)
avctx->frame_size = BLKSIZE * 2 / avctx->channels;
avctx->block_align = BLKSIZE;
break;
+ case AV_CODEC_ID_ADPCM_IMA_APM:
+ avctx->frame_size = BLKSIZE * 2 / avctx->channels;
+ avctx->block_align = BLKSIZE;
+
+ if (!(avctx->extradata = av_mallocz(28 + AV_INPUT_BUFFER_PADDING_SIZE)))
+ return AVERROR(ENOMEM);
+ avctx->extradata_size = 28;
+ break;
default:
return AVERROR(EINVAL);
}
@@ -488,7 +498,8 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
if (avctx->codec_id == AV_CODEC_ID_ADPCM_SWF)
pkt_size = (2 + avctx->channels * (22 + 4 * (frame->nb_samples - 1)) + 7) / 8;
- else if (avctx->codec_id == AV_CODEC_ID_ADPCM_IMA_SSI)
+ else if (avctx->codec_id == AV_CODEC_ID_ADPCM_IMA_SSI ||
+ avctx->codec_id == AV_CODEC_ID_ADPCM_IMA_APM)
pkt_size = (frame->nb_samples * avctx->channels) / 2;
else
pkt_size = avctx->block_align;
@@ -713,6 +724,24 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
*dst++ = nibble;
}
break;
+ case AV_CODEC_ID_ADPCM_IMA_APM:
+ {
+ PutBitContext pb;
+ init_put_bits(&pb, dst, pkt_size);
+
+ av_assert0(avctx->trellis == 0);
+
+ for (n = frame->nb_samples / 2; n > 0; n--) {
+ for (ch = 0; ch < avctx->channels; ch++) {
+ put_bits(&pb, 4, adpcm_ima_qt_compress_sample(c->status + ch, *samples++));
+ put_bits(&pb, 4, adpcm_ima_qt_compress_sample(c->status + ch, samples[st]));
+ }
+ samples += avctx->channels;
+ }
+
+ flush_put_bits(&pb);
+ break;
+ }
default:
return AVERROR(EINVAL);
}
@@ -745,6 +774,7 @@ AVCodec ff_ ## name_ ## _encoder = { \
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, \
}
+ADPCM_ENCODER(AV_CODEC_ID_ADPCM_IMA_APM, adpcm_ima_apm, sample_fmts, AV_CODEC_CAP_SMALL_LAST_FRAME, "ADPCM IMA Ubisoft APM");
ADPCM_ENCODER(AV_CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, sample_fmts_p, 0, "ADPCM IMA QuickTime");
ADPCM_ENCODER(AV_CODEC_ID_ADPCM_IMA_SSI, adpcm_ima_ssi, sample_fmts, AV_CODEC_CAP_SMALL_LAST_FRAME, "ADPCM IMA Simon & Schuster Interactive");
ADPCM_ENCODER(AV_CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, sample_fmts_p, 0, "ADPCM IMA WAV");
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 80f128cade..f7d560052e 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -607,6 +607,7 @@ extern AVCodec ff_adpcm_ima_amv_decoder;
extern AVCodec ff_adpcm_ima_alp_decoder;
extern AVCodec ff_adpcm_ima_apc_decoder;
extern AVCodec ff_adpcm_ima_apm_decoder;
+extern AVCodec ff_adpcm_ima_apm_encoder;
extern AVCodec ff_adpcm_ima_cunning_decoder;
extern AVCodec ff_adpcm_ima_dat4_decoder;
extern AVCodec ff_adpcm_ima_dk3_decoder;
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index b61f274ab3..0c4bc4d174 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1480,6 +1480,7 @@ int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
case AV_CODEC_ID_8SVX_FIB:
case AV_CODEC_ID_ADPCM_CT:
case AV_CODEC_ID_ADPCM_IMA_APC:
+ case AV_CODEC_ID_ADPCM_IMA_APM:
case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
case AV_CODEC_ID_ADPCM_IMA_OKI:
case AV_CODEC_ID_ADPCM_IMA_WS:
--
2.25.1
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