[FFmpeg-cvslog] HNM4/HNM4A demuxer & video decoder
David Kment
git at videolan.org
Fri Nov 1 10:56:03 CET 2013
ffmpeg | branch: master | David Kment <info at davidkment.de> | Mon Oct 28 01:38:02 2013 +0100| [9af7a8523a6bb517834ebed36093bdab11a8b38e] | committer: Diego Biurrun
HNM4/HNM4A demuxer & video decoder
Signed-off-by: Diego Biurrun <diego at biurrun.de>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9af7a8523a6bb517834ebed36093bdab11a8b38e
---
Changelog | 1 +
doc/general.texi | 3 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/codec_desc.c | 7 +
libavcodec/hnm4video.c | 459 ++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/hnm.c | 204 +++++++++++++++++++++
libavformat/version.h | 2 +-
12 files changed, 681 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index 4032d07..de622d3 100644
--- a/Changelog
+++ b/Changelog
@@ -40,6 +40,7 @@ version 10:
- Opus in Ogg demuxing
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
- F4V muxer
+- HNM version 4 demuxer and video decoder
version 9:
diff --git a/doc/general.texi b/doc/general.texi
index c2dc272..c50e89f 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -194,6 +194,8 @@ library:
@item GXF @tab X @tab X
@tab General eXchange Format SMPTE 360M, used by Thomson Grass Valley
playout servers.
+ at item HNM @tab @tab X
+ @tab Only version 4 supported, used in some games from Cryo Interactive
@item id Quake II CIN video @tab @tab X
@item id RoQ @tab X @tab X
@tab Used in Quake III, Jedi Knight 2, other computer games.
@@ -524,6 +526,7 @@ following image formats are supported:
@item H.263+ / H.263-1998 / H.263 version 2 @tab X @tab X
@item H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 @tab E @tab X
@tab encoding supported through external library libx264
+ at item HNM version 4 @tab @tab X
@item HuffYUV @tab X @tab X
@item HuffYUV FFmpeg variant @tab X @tab X
@item IBM Ultimotion @tab @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 6f80a9e..ffee97a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -196,6 +196,7 @@ OBJS-$(CONFIG_H264_DECODER) += h264.o \
h264_loopfilter.o h264_direct.o \
cabac.o h264_sei.o h264_ps.o \
h264_refs.o h264_cavlc.o h264_cabac.o
+OBJS-$(CONFIG_HNM4_VIDEO_DECODER) += hnm4video.o
OBJS-$(CONFIG_HUFFYUV_DECODER) += huffyuv.o huffyuvdec.o
OBJS-$(CONFIG_HUFFYUV_ENCODER) += huffyuv.o huffyuvenc.o
OBJS-$(CONFIG_IAC_DECODER) += imc.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 55d7957..b62efb9 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -153,6 +153,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(H263I, h263i);
REGISTER_ENCODER(H263P, h263p);
REGISTER_DECODER(H264, h264);
+ REGISTER_DECODER(HNM4_VIDEO, hnm4_video);
REGISTER_ENCDEC (HUFFYUV, huffyuv);
REGISTER_DECODER(IDCIN, idcin);
REGISTER_DECODER(IFF_BYTERUN1, iff_byterun1);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index ad45d97..6cd7076 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -274,6 +274,7 @@ enum AVCodecID {
AV_CODEC_ID_ESCAPE130,
AV_CODEC_ID_G2M,
AV_CODEC_ID_WEBP,
+ AV_CODEC_ID_HNM4_VIDEO,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index f486cb2..ddeca8a 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1236,6 +1236,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY |
AV_CODEC_PROP_LOSSLESS,
},
+ {
+ .id = AV_CODEC_ID_HNM4_VIDEO,
+ .type = AVMEDIA_TYPE_VIDEO,
+ .name = "hnm4video",
+ .long_name = NULL_IF_CONFIG_SMALL("HNM 4 video"),
+ .props = AV_CODEC_PROP_LOSSY,
+ },
/* various PCM "codecs" */
{
diff --git a/libavcodec/hnm4video.c b/libavcodec/hnm4video.c
new file mode 100644
index 0000000..b200e89
--- /dev/null
+++ b/libavcodec/hnm4video.c
@@ -0,0 +1,459 @@
+/*
+ * Cryo Interactive Entertainment HNM4 video decoder
+ *
+ * Copyright (c) 2012 David Kment
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
+#include "avcodec.h"
+#include "bytestream.h"
+#include "internal.h"
+
+#define HNM4_CHUNK_ID_PL 19536
+#define HNM4_CHUNK_ID_IZ 23113
+#define HNM4_CHUNK_ID_IU 21833
+#define HNM4_CHUNK_ID_SD 17491
+
+typedef struct Hnm4VideoContext {
+ uint8_t version;
+ uint16_t width;
+ uint16_t height;
+ uint8_t *current;
+ uint8_t *previous;
+ uint8_t *buffer1;
+ uint8_t *buffer2;
+ uint8_t *processed;
+ uint32_t palette[256];
+} Hnm4VideoContext;
+
+static int getbit(GetByteContext *gb, uint32_t *bitbuf, int *bits)
+{
+ int ret;
+
+ if (!*bits) {
+ *bitbuf = bytestream2_get_le32(gb);
+ *bits = 32;
+ }
+
+ ret = *bitbuf >> 31;
+ *bitbuf <<= 1;
+ (*bits)--;
+
+ return ret;
+}
+
+static void unpack_intraframe(AVCodecContext *avctx, uint8_t *src,
+ uint32_t size)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ GetByteContext gb;
+ uint32_t bitbuf = 0, writeoffset = 0, count = 0;
+ uint16_t word;
+ int32_t offset;
+ int bits = 0;
+
+ bytestream2_init(&gb, src, size);
+
+ while (bytestream2_tell(&gb) < size) {
+ if (getbit(&gb, &bitbuf, &bits)) {
+ if (writeoffset >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Attempting to write out of bounds");
+ break;
+ }
+ hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
+ } else {
+ if (getbit(&gb, &bitbuf, &bits)) {
+ word = bytestream2_get_le16(&gb);
+ count = word & 0x07;
+ offset = (word >> 3) - 0x2000;
+ if (!count)
+ count = bytestream2_get_byte(&gb);
+ if (!count)
+ return;
+ } else {
+ count = getbit(&gb, &bitbuf, &bits) * 2;
+ count += getbit(&gb, &bitbuf, &bits);
+ offset = bytestream2_get_byte(&gb) - 0x0100;
+ }
+ count += 2;
+ offset += writeoffset;
+ if (offset < 0 || offset + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
+ break;
+ } else if (writeoffset + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Attempting to write out of bounds");
+ break;
+ }
+ while (count--) {
+ hnm->current[writeoffset++] = hnm->current[offset++];
+ }
+ }
+ }
+}
+
+static void postprocess_current_frame(AVCodecContext *avctx)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ uint32_t x, y, src_x, src_y;
+
+ for (y = 0; y < hnm->height; y++) {
+ src_y = y - (y % 2);
+ src_x = src_y * hnm->width + (y % 2);
+ for (x = 0; x < hnm->width; x++) {
+ hnm->processed[(y * hnm->width) + x] = hnm->current[src_x];
+ src_x += 2;
+ }
+ }
+}
+
+static void copy_processed_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ uint8_t *src = hnm->processed;
+ uint8_t *dst = frame->data[0];
+ int y;
+
+ for (y = 0; y < hnm->height; y++) {
+ memcpy(dst, src, hnm->width);
+ src += hnm->width;
+ dst += frame->linesize[0];
+ }
+}
+
+static void decode_interframe_v4(AVCodecContext *avctx, uint8_t *src, uint32_t size)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ GetByteContext gb;
+ uint32_t writeoffset = 0, count, left, offset;
+ uint8_t tag, previous, backline, backward, swap;
+
+ bytestream2_init(&gb, src, size);
+
+ while (bytestream2_tell(&gb) < size) {
+ count = bytestream2_peek_byte(&gb) & 0x1F;
+ if (count == 0) {
+ tag = bytestream2_get_byte(&gb) & 0xE0;
+ tag = tag >> 5;
+ if (tag == 0) {
+ hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
+ hnm->current[writeoffset++] = bytestream2_get_byte(&gb);
+ } else if (tag == 1) {
+ writeoffset += bytestream2_get_byte(&gb) * 2;
+ } else if (tag == 2) {
+ count = bytestream2_get_le16(&gb);
+ count *= 2;
+ writeoffset += count;
+ } else if (tag == 3) {
+ count = bytestream2_get_byte(&gb) * 2;
+ while (count > 0) {
+ hnm->current[writeoffset++] = bytestream2_peek_byte(&gb);
+ count--;
+ }
+ bytestream2_skip(&gb, 1);
+ } else {
+ break;
+ }
+ } else {
+ previous = bytestream2_peek_byte(&gb) & 0x20;
+ backline = bytestream2_peek_byte(&gb) & 0x40;
+ backward = bytestream2_peek_byte(&gb) & 0x80;
+ bytestream2_skip(&gb, 1);
+ swap = bytestream2_peek_byte(&gb) & 0x01;
+ offset = bytestream2_get_le16(&gb);
+ offset = (offset >> 1) & 0x7FFF;
+ offset = writeoffset + (offset * 2) - 0x8000;
+
+ left = count;
+
+ if (!backward && offset + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
+ break;
+ } else if (backward && offset >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
+ break;
+ } else if (writeoffset + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Attempting to write out of bounds");
+ break;
+ }
+
+ if (previous) {
+ while (left > 0) {
+ if (backline) {
+ hnm->current[writeoffset++] = hnm->previous[offset - (2 * hnm->width) + 1];
+ hnm->current[writeoffset++] = hnm->previous[offset++];
+ offset++;
+ } else {
+ hnm->current[writeoffset++] = hnm->previous[offset++];
+ hnm->current[writeoffset++] = hnm->previous[offset++];
+ }
+ if (backward)
+ offset -= 4;
+ left--;
+ }
+ } else {
+ while (left > 0) {
+ if (backline) {
+ hnm->current[writeoffset++] = hnm->current[offset - (2 * hnm->width) + 1];
+ hnm->current[writeoffset++] = hnm->current[offset++];
+ offset++;
+ } else {
+ hnm->current[writeoffset++] = hnm->current[offset++];
+ hnm->current[writeoffset++] = hnm->current[offset++];
+ }
+ if (backward)
+ offset -= 4;
+ left--;
+ }
+ }
+
+ if (swap) {
+ left = count;
+ writeoffset -= count * 2;
+ while (left > 0) {
+ swap = hnm->current[writeoffset];
+ hnm->current[writeoffset] = hnm->current[writeoffset + 1];
+ hnm->current[writeoffset + 1] = swap;
+ left--;
+ writeoffset += 2;
+ }
+ }
+ }
+ }
+}
+
+static void decode_interframe_v4a(AVCodecContext *avctx, uint8_t *src,
+ uint32_t size)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ GetByteContext gb;
+ uint32_t writeoffset = 0, offset;
+ uint8_t tag, count, previous, delta;
+
+ bytestream2_init(&gb, src, size);
+
+ while (bytestream2_tell(&gb) < size) {
+ count = bytestream2_peek_byte(&gb) & 0x3F;
+ if (count == 0) {
+ tag = bytestream2_get_byte(&gb) & 0xC0;
+ tag = tag >> 6;
+ if (tag == 0) {
+ writeoffset += bytestream2_get_byte(&gb);
+ } else if (tag == 1) {
+ hnm->current[writeoffset] = bytestream2_get_byte(&gb);
+ hnm->current[writeoffset + hnm->width] = bytestream2_get_byte(&gb);
+ writeoffset++;
+ } else if (tag == 2) {
+ writeoffset += hnm->width;
+ } else if (tag == 3) {
+ break;
+ }
+ } else {
+ delta = bytestream2_peek_byte(&gb) & 0x80;
+ previous = bytestream2_peek_byte(&gb) & 0x40;
+ bytestream2_skip(&gb, 1);
+
+ offset = writeoffset;
+ offset += bytestream2_get_le16(&gb);
+
+ if (delta)
+ offset -= 0x10000;
+
+ if (offset + hnm->width + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR, "Attempting to read out of bounds");
+ break;
+ } else if (writeoffset + hnm->width + count >= hnm->width * hnm->height) {
+ av_log(avctx, AV_LOG_ERROR, "Attempting to write out of bounds");
+ break;
+ }
+
+ if (previous) {
+ while (count > 0) {
+ hnm->current[writeoffset] = hnm->previous[offset];
+ hnm->current[writeoffset + hnm->width] = hnm->previous[offset + hnm->width];
+ writeoffset++;
+ offset++;
+ count--;
+ }
+ } else {
+ while (count > 0) {
+ hnm->current[writeoffset] = hnm->current[offset];
+ hnm->current[writeoffset + hnm->width] = hnm->current[offset + hnm->width];
+ writeoffset++;
+ offset++;
+ count--;
+ }
+ }
+ }
+ }
+}
+
+static void hnm_update_palette(AVCodecContext *avctx, uint8_t *src,
+ uint32_t size)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ GetByteContext gb;
+ uint8_t start, writeoffset;
+ uint16_t count;
+ int eight_bit_colors;
+
+ eight_bit_colors = src[7] & 0x80 && hnm->version == 0x4a;
+
+ // skip first 8 bytes
+ bytestream2_init(&gb, src + 8, size - 8);
+
+ while (bytestream2_tell(&gb) < size - 8) {
+ start = bytestream2_get_byte(&gb);
+ count = bytestream2_get_byte(&gb);
+ if (start == 255 && count == 255)
+ break;
+ if (count == 0)
+ count = 256;
+ writeoffset = start;
+ while (count > 0) {
+ hnm->palette[writeoffset] = bytestream2_get_be24(&gb);
+ if (!eight_bit_colors)
+ hnm->palette[writeoffset] <<= 2;
+ count--;
+ writeoffset++;
+ }
+ }
+}
+
+static void hnm_flip_buffers(Hnm4VideoContext *hnm)
+{
+ uint8_t *temp;
+
+ temp = hnm->current;
+ hnm->current = hnm->previous;
+ hnm->previous = temp;
+}
+
+static int hnm_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *avpkt)
+{
+ AVFrame *frame = data;
+ Hnm4VideoContext *hnm = avctx->priv_data;
+ int ret;
+ uint16_t chunk_id;
+
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+
+ chunk_id = AV_RL16(avpkt->data + 4);
+
+ if (chunk_id == HNM4_CHUNK_ID_PL) {
+ hnm_update_palette(avctx, avpkt->data, avpkt->size);
+ frame->palette_has_changed = 1;
+ } else if (chunk_id == HNM4_CHUNK_ID_IZ) {
+ unpack_intraframe(avctx, avpkt->data + 12, avpkt->size - 12);
+ memcpy(hnm->previous, hnm->current, hnm->width * hnm->height);
+ if (hnm->version == 0x4a)
+ memcpy(hnm->processed, hnm->current, hnm->width * hnm->height);
+ else
+ postprocess_current_frame(avctx);
+ copy_processed_frame(avctx, frame);
+ frame->pict_type = AV_PICTURE_TYPE_I;
+ frame->key_frame = 1;
+ memcpy(frame->data[1], hnm->palette, 256 * 4);
+ *got_frame = 1;
+ } else if (chunk_id == HNM4_CHUNK_ID_IU) {
+ if (hnm->version == 0x4a) {
+ decode_interframe_v4a(avctx, avpkt->data + 8, avpkt->size - 8);
+ memcpy(hnm->processed, hnm->current, hnm->width * hnm->height);
+ } else {
+ decode_interframe_v4(avctx, avpkt->data + 8, avpkt->size - 8);
+ postprocess_current_frame(avctx);
+ }
+ copy_processed_frame(avctx, frame);
+ frame->pict_type = AV_PICTURE_TYPE_P;
+ frame->key_frame = 0;
+ memcpy(frame->data[1], hnm->palette, 256 * 4);
+ *got_frame = 1;
+ hnm_flip_buffers(hnm);
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "invalid chunk id: %d\n", chunk_id);
+ return AVERROR_INVALIDDATA;
+ }
+
+ return avpkt->size;
+}
+
+static av_cold int hnm_decode_init(AVCodecContext *avctx)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+
+ if (avctx->extradata_size < 1) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Extradata missing, decoder requires version number\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ hnm->version = avctx->extradata[0];
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ hnm->width = avctx->width;
+ hnm->height = avctx->height;
+ hnm->buffer1 = av_mallocz(avctx->width * avctx->height);
+ hnm->buffer2 = av_mallocz(avctx->width * avctx->height);
+ hnm->processed = av_mallocz(avctx->width * avctx->height);
+
+ if (!hnm->buffer1 || !hnm->buffer2 || !hnm->processed) {
+ av_log(avctx, AV_LOG_ERROR, "av_mallocz() failed\n");
+ av_freep(&hnm->buffer1);
+ av_freep(&hnm->buffer2);
+ av_freep(&hnm->processed);
+ return AVERROR(ENOMEM);
+ }
+
+ hnm->current = hnm->buffer1;
+ hnm->previous = hnm->buffer2;
+
+ return 0;
+}
+
+static av_cold int hnm_decode_end(AVCodecContext *avctx)
+{
+ Hnm4VideoContext *hnm = avctx->priv_data;
+
+ av_freep(&hnm->buffer1);
+ av_freep(&hnm->buffer2);
+ av_freep(&hnm->processed);
+
+ return 0;
+}
+
+AVCodec ff_hnm4_video_decoder = {
+ .name = "hnm4video",
+ .long_name = NULL_IF_CONFIG_SMALL("HNM 4 video"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_HNM4_VIDEO,
+ .priv_data_size = sizeof(Hnm4VideoContext),
+ .init = hnm_decode_init,
+ .close = hnm_decode_end,
+ .decode = hnm_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index e394c76..838587f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -27,7 +27,7 @@
*/
#define LIBAVCODEC_VERSION_MAJOR 55
-#define LIBAVCODEC_VERSION_MINOR 22
+#define LIBAVCODEC_VERSION_MINOR 23
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 9bc9cdf..d474784 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -142,6 +142,7 @@ OBJS-$(CONFIG_H264_DEMUXER) += h264dec.o rawdec.o
OBJS-$(CONFIG_H264_MUXER) += rawenc.o
OBJS-$(CONFIG_HLS_DEMUXER) += hls.o
OBJS-$(CONFIG_HLS_MUXER) += hlsenc.o
+OBJS-$(CONFIG_HNM_DEMUXER) += hnm.o
OBJS-$(CONFIG_IDCIN_DEMUXER) += idcin.o
OBJS-$(CONFIG_IFF_DEMUXER) += iff.o
OBJS-$(CONFIG_ILBC_DEMUXER) += ilbc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index fe5f582..a695815 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -118,6 +118,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX(H263, h263);
REGISTER_MUXDEMUX(H264, h264);
REGISTER_MUXDEMUX(HLS, hls);
+ REGISTER_DEMUXER (HNM, hnm);
REGISTER_DEMUXER (IDCIN, idcin);
REGISTER_DEMUXER (IFF, iff);
REGISTER_MUXDEMUX(ILBC, ilbc);
diff --git a/libavformat/hnm.c b/libavformat/hnm.c
new file mode 100644
index 0000000..ee34a14
--- /dev/null
+++ b/libavformat/hnm.c
@@ -0,0 +1,204 @@
+/*
+ * Cryo Interactive Entertainment HNM4 demuxer
+ *
+ * Copyright (c) 2012 David Kment
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define HNM4_TAG MKTAG('H', 'N', 'M', '4')
+
+#define HNM4_SAMPLE_RATE 22050
+#define HNM4_FRAME_FPS 24
+
+#define HNM4_CHUNK_ID_PL 19536
+#define HNM4_CHUNK_ID_IZ 23113
+#define HNM4_CHUNK_ID_IU 21833
+#define HNM4_CHUNK_ID_SD 17491
+
+typedef struct Hnm4DemuxContext {
+ uint8_t version;
+ uint16_t width;
+ uint16_t height;
+ uint32_t filesize;
+ uint32_t frames;
+ uint32_t taboffset;
+ uint16_t bits;
+ uint16_t channels;
+ uint32_t framesize;
+ uint32_t currentframe;
+ int64_t pts;
+ uint32_t superchunk_remaining;
+ AVPacket vpkt;
+} Hnm4DemuxContext;
+
+static int hnm_probe(AVProbeData *p)
+{
+ if (p->buf_size < 4)
+ return 0;
+
+ // check for HNM4 header.
+ // currently only HNM v4/v4A is supported
+ if (AV_RL32(&p->buf[0]) == HNM4_TAG)
+ return AVPROBE_SCORE_MAX;
+
+ return 0;
+}
+
+static int hnm_read_header(AVFormatContext *s)
+{
+ Hnm4DemuxContext *hnm = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *vst;
+
+ /* default context members */
+ hnm->pts = 0;
+ av_init_packet(&hnm->vpkt);
+ hnm->vpkt.data = NULL;
+ hnm->vpkt.size = 0;
+
+ hnm->superchunk_remaining = 0;
+
+ avio_skip(pb, 8);
+ hnm->width = avio_rl16(pb);
+ hnm->height = avio_rl16(pb);
+ hnm->filesize = avio_rl32(pb);
+ hnm->frames = avio_rl32(pb);
+ hnm->taboffset = avio_rl32(pb);
+ hnm->bits = avio_rl16(pb);
+ hnm->channels = avio_rl16(pb);
+ hnm->framesize = avio_rl32(pb);
+ avio_skip(pb, 32);
+
+ hnm->currentframe = 0;
+
+ if (hnm->width < 320 || hnm->width > 640 ||
+ hnm->height < 150 || hnm->height > 480) {
+ av_log(s, AV_LOG_ERROR,
+ "invalid resolution: %ux%u\n", hnm->width, hnm->height);
+ return AVERROR_INVALIDDATA;
+ }
+
+ // TODO: find a better way to detect HNM4A
+ if (hnm->width == 640)
+ hnm->version = 0x4a;
+ else
+ hnm->version = 0x40;
+
+ if (!(vst = avformat_new_stream(s, NULL)))
+ return AVERROR(ENOMEM);
+
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ vst->codec->codec_id = AV_CODEC_ID_HNM4_VIDEO;
+ vst->codec->codec_tag = 0;
+ vst->codec->width = hnm->width;
+ vst->codec->height = hnm->height;
+ vst->codec->extradata = av_mallocz(1);
+
+ vst->codec->extradata_size = 1;
+ memcpy(vst->codec->extradata, &hnm->version, 1);
+
+ vst->start_time = 0;
+
+ avpriv_set_pts_info(vst, 33, 1, HNM4_FRAME_FPS);
+
+ return 0;
+}
+
+static int hnm_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ Hnm4DemuxContext *hnm = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int ret = 0;
+
+ uint32_t superchunk_size, chunk_size;
+ uint16_t chunk_id;
+
+ if (hnm->currentframe == hnm->frames || pb->eof_reached)
+ return AVERROR_EOF;
+
+ if (hnm->superchunk_remaining == 0) {
+ /* parse next superchunk */
+ superchunk_size = avio_rl24(pb);
+ avio_skip(pb, 1);
+
+ hnm->superchunk_remaining = superchunk_size - 4;
+ }
+
+ chunk_size = avio_rl24(pb);
+ avio_skip(pb, 1);
+ chunk_id = avio_rl16(pb);
+ avio_skip(pb, 2);
+
+ if (chunk_size > hnm->superchunk_remaining) {
+ av_log(s, AV_LOG_ERROR, "invalid chunk size: %u, offset: %u\n",
+ chunk_size, (int) avio_tell(pb));
+ avio_skip(pb, hnm->superchunk_remaining - 8);
+ hnm->superchunk_remaining = 0;
+ }
+
+ switch (chunk_id) {
+ case HNM4_CHUNK_ID_PL:
+ case HNM4_CHUNK_ID_IZ:
+ case HNM4_CHUNK_ID_IU:
+ avio_seek(pb, -8, SEEK_CUR);
+ ret += av_get_packet(pb, pkt, chunk_size);
+ hnm->superchunk_remaining -= chunk_size;
+ if (chunk_id == HNM4_CHUNK_ID_IZ || chunk_id == HNM4_CHUNK_ID_IU)
+ hnm->currentframe++;
+ break;
+
+ case HNM4_CHUNK_ID_SD:
+ avio_skip(pb, chunk_size - 8);
+ hnm->superchunk_remaining -= chunk_size;
+ break;
+
+ default:
+ av_log(s, AV_LOG_WARNING, "unknown chunk found: %d, offset: %d\n",
+ chunk_id, (int) avio_tell(pb));
+ avio_skip(pb, chunk_size - 8);
+ hnm->superchunk_remaining -= chunk_size;
+ break;
+ }
+
+ return ret;
+}
+
+static int hnm_read_close(AVFormatContext *s)
+{
+ Hnm4DemuxContext *hnm = s->priv_data;
+
+ if (hnm->vpkt.size > 0)
+ av_free_packet(&hnm->vpkt);
+
+ return 0;
+}
+
+AVInputFormat ff_hnm_demuxer = {
+ .name = "hnm",
+ .long_name = NULL_IF_CONFIG_SMALL("Cryo HNM v4"),
+ .priv_data_size = sizeof(Hnm4DemuxContext),
+ .read_probe = hnm_probe,
+ .read_header = hnm_read_header,
+ .read_packet = hnm_read_packet,
+ .read_close = hnm_read_close,
+ .flags = AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 791933f..0293225 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 55
-#define LIBAVFORMAT_VERSION_MINOR 7
+#define LIBAVFORMAT_VERSION_MINOR 8
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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