Paul B Mahol:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> configure | 1 +
> libavcodec/Makefile | 1 +
> libavcodec/allcodecs.c | 1 +
> libavcodec/avcodec.h | 1 +
> libavcodec/codec_desc.c | 7 ++
> libavcodec/imm5.c | 171 ++++++++++++++++++++++++++++++++++++++++
> libavformat/riff.c | 1 +
> 7 files changed, 183 insertions(+)
> create mode 100644 libavcodec/imm5.c
>
> diff --git a/configure b/configure
> index 5a4f507246..d03cf43350 100755
> --- a/configure
> +++ b/configure
> @@ -2714,6 +2714,7 @@ huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp
> llvidencdsp"
> hymt_decoder_select="huffyuv_decoder"
> iac_decoder_select="imc_decoder"
> imc_decoder_select="bswapdsp fft mdct sinewin"
> +imm5_decoder_select="h264_decoder hevc_decoder"
> indeo3_decoder_select="hpeldsp"
> indeo4_decoder_select="ividsp"
> indeo5_decoder_select="ividsp"
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index 3cd73fbcc6..39f4d9118c 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -393,6 +393,7 @@ OBJS-$(CONFIG_IFF_ILBM_DECODER) += iff.o
> OBJS-$(CONFIG_ILBC_DECODER) += ilbcdec.o
> OBJS-$(CONFIG_IMC_DECODER) += imc.o
> OBJS-$(CONFIG_IMM4_DECODER) += imm4.o
> +OBJS-$(CONFIG_IMM5_DECODER) += imm5.o
> OBJS-$(CONFIG_INDEO2_DECODER) += indeo2.o
> OBJS-$(CONFIG_INDEO3_DECODER) += indeo3.o
> OBJS-$(CONFIG_INDEO4_DECODER) += indeo4.o ivi.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index d2f9a39ce5..fe7f773925 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -158,6 +158,7 @@ extern AVCodec ff_hymt_decoder;
> extern AVCodec ff_idcin_decoder;
> extern AVCodec ff_iff_ilbm_decoder;
> extern AVCodec ff_imm4_decoder;
> +extern AVCodec ff_imm5_decoder;
> extern AVCodec ff_indeo2_decoder;
> extern AVCodec ff_indeo3_decoder;
> extern AVCodec ff_indeo4_decoder;
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 2528bd89ab..da6f92b443 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -457,6 +457,7 @@ enum AVCodecID {
> AV_CODEC_ID_AGM,
> AV_CODEC_ID_LSCR,
> AV_CODEC_ID_VP4,
> + AV_CODEC_ID_IMM5,
>
> /* 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 4d033c20ff..e6373be504 100644
> --- a/libavcodec/codec_desc.c
> +++ b/libavcodec/codec_desc.c
> @@ -1726,6 +1726,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
> .long_name = NULL_IF_CONFIG_SMALL("On2 VP4"),
> .props = AV_CODEC_PROP_LOSSY,
> },
> + {
> + .id = AV_CODEC_ID_IMM5,
> + .type = AVMEDIA_TYPE_VIDEO,
> + .name = "imm5",
> + .long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
> + .props = AV_CODEC_PROP_LOSSY,
> + },
>
> /* various PCM "codecs" */
> {
> diff --git a/libavcodec/imm5.c b/libavcodec/imm5.c
> new file mode 100644
> index 0000000000..d1bac342d0
> --- /dev/null
> +++ b/libavcodec/imm5.c
> @@ -0,0 +1,171 @@
> +/*
> + * Copyright (c) 2019 Paul B Mahol
> + *
> + * 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 "libavutil/intreadwrite.h"
> +
> +#include "avcodec.h"
> +#include "internal.h"
> +
> +typedef struct IMM5Context {
> + AVCodecContext *h264_avctx; // wrapper context for H264
> + AVCodecContext *hevc_avctx; // wrapper context for HEVC
> +} IMM5Context;
> +
> +static const struct IMM5_unit {
> + uint8_t bits[14];
> + uint8_t len;
> +} IMM5_units[14] = {
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F,
> 0x88 }, 12 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83,
> 0xE2 }, 12 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81,
> 0xE8, 0x80 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04,
> 0xA2 }, 12 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81,
> 0x28, 0x80 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80,
> 0x92, 0x20 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B,
> 0x0F, 0xC8 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05,
> 0x83, 0xF2 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05,
> 0x81, 0xEC, 0x80 }, 14 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B,
> 0x04, 0xB2 }, 13 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05,
> 0x81, 0x2C, 0x80 }, 14 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05,
> 0x80, 0x93, 0x20 }, 14 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
> + { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
> +};
> +
> +static av_cold int imm5_init(AVCodecContext *avctx)
> +{
> + IMM5Context *ctx = avctx->priv_data;
> + const AVCodec *codec;
> + int ret;
> +
> + codec = avcodec_find_decoder(AV_CODEC_ID_H264);
> + if (!codec)
> + return AVERROR_BUG;
> + ctx->h264_avctx = avcodec_alloc_context3(codec);
> + if (!ctx->h264_avctx)
> + return AVERROR(ENOMEM);
> + ctx->h264_avctx->thread_count = 1;
> + ctx->h264_avctx->flags = avctx->flags;
> + ctx->h264_avctx->flags2 = avctx->flags2;
> + ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL);
> + if (ret < 0)
> + return ret;
> +
> + codec = avcodec_find_decoder(AV_CODEC_ID_HEVC);
> + if (!codec)
> + return AVERROR_BUG;
> + ctx->hevc_avctx = avcodec_alloc_context3(codec);
> + if (!ctx->hevc_avctx)
> + return AVERROR(ENOMEM);
> + ctx->hevc_avctx->thread_count = 1;
> + ctx->hevc_avctx->flags = avctx->flags;
> + ctx->hevc_avctx->flags2 = avctx->flags2;
> + ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int imm5_decode_frame(AVCodecContext *avctx, void *data,
> + int *got_frame, AVPacket *avpkt)
> +{
> + IMM5Context *ctx = avctx->priv_data;
> + AVFrame *frame = data;
> + AVCodecContext *codec_avctx = ctx->h264_avctx;
> + int ret;
> +
> + if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4)
> + 24ULL <= avpkt->size) {
> + int codec_type = avpkt->data[1];
> + int index = avpkt->data[10];
> + int new_size = AV_RL32(avpkt->data + 4);
> + int offset, off;
Nit: These variables are only used in the block below and could
therefore be moved there.
> +
> + if (codec_type == 0xA)
> + codec_avctx = ctx->hevc_avctx;
> +
> + if (index >= 1 && index <= 12) {
> + ret = av_packet_make_writable(avpkt);
Making the packet writable here will copy the whole buffer; if
new_size is much smaller than avpkt->size (I don't know if this really
happens), it will copy lots of unnecessary data. Move this call
directly before memcpy to avoid this.
> + if (ret < 0)
> + return ret;
> +
> + index -= 1;
> + off = offset = IMM5_units[index].len;
> + if (codec_type == 2) {
> + offset += IMM5_units[12].len;
> + } else {
> + offset += IMM5_units[13].len;
> + }
> +
> + avpkt->data += 24 - offset;
> + avpkt->size = new_size + offset;
> +
> + memcpy(avpkt->data, IMM5_units[index].bits,
> IMM5_units[index].len);
> + if (codec_type == 2) {
> + memcpy(avpkt->data + off, IMM5_units[12].bits,
> IMM5_units[12].len);
> + } else {
> + memcpy(avpkt->data + off, IMM5_units[13].bits,
> IMM5_units[13].len);
> + }
> + } else {
> + avpkt->data += 24;
> + avpkt->size -= 24;
Is the new_size only valid if 1 <= index <= 12? I'm wondering whether
the above should not really be avpkt->size = new_size;
> + }
> + }
> +
> + ret = avcodec_send_packet(codec_avctx, avpkt);
> + if (ret < 0) {
> + av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for
> decoding\n");
> + return ret;
> + }
> +
> + ret = avcodec_receive_frame(codec_avctx, frame);
> + if (ret < 0)
> + return ret;
> +
> + avctx->pix_fmt = codec_avctx->pix_fmt;
> + avctx->width = codec_avctx->width;
> + avctx->height = codec_avctx->height;
> +
> + *got_frame = 1;
> +
> + return avpkt->size;
> +}
> +
> +static av_cold int imm5_close(AVCodecContext *avctx)
> +{
> + IMM5Context *ctx = avctx->priv_data;
> +
> + avcodec_free_context(&ctx->h264_avctx);
> + avcodec_free_context(&ctx->hevc_avctx);
> +
> + return 0;
> +}
> +
> +AVCodec ff_imm5_decoder = {
> + .name = "imm5",
> + .long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
> + .type = AVMEDIA_TYPE_VIDEO,
> + .id = AV_CODEC_ID_IMM5,
> + .init = imm5_init,
> + .decode = imm5_decode_frame,
> + .close = imm5_close,
> + .priv_data_size = sizeof(IMM5Context),
> + .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
> + FF_CODEC_CAP_INIT_CLEANUP,
> +};
> diff --git a/libavformat/riff.c b/libavformat/riff.c
> index e755ad8d5f..610974ebf0 100644
> --- a/libavformat/riff.c
> +++ b/libavformat/riff.c
> @@ -488,6 +488,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
> { AV_CODEC_ID_AGM, MKTAG('A', 'G', 'M', '6') },
> { AV_CODEC_ID_AGM, MKTAG('A', 'G', 'M', '7') },
> { AV_CODEC_ID_LSCR, MKTAG('L', 'S', 'C', 'R') },
> + { AV_CODEC_ID_IMM5, MKTAG('I', 'M', 'M', '5') },
> { AV_CODEC_ID_NONE, 0 }
> };
>
>
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