/* * 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; if (codec_type == 0xA) { codec_avctx = ctx->hevc_avctx; } else if (index == 17) { index = 4; } else if (index == 18) { index = 5; } if (index >= 1 && index <= 12) { ret = av_packet_make_writable(avpkt); 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; } } 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->coded_width = codec_avctx->coded_width; avctx->coded_height = codec_avctx->coded_height; avctx->width = codec_avctx->width; avctx->height = codec_avctx->height; avctx->bit_rate = codec_avctx->bit_rate; avctx->colorspace = codec_avctx->colorspace; avctx->color_range = codec_avctx->color_range; avctx->color_trc = codec_avctx->color_trc; avctx->color_primaries = codec_avctx->color_primaries; avctx->chroma_sample_location = codec_avctx->chroma_sample_location; *got_frame = 1; return avpkt->size; } static void imm5_flush(AVCodecContext *avctx) { IMM5Context *ctx = avctx->priv_data; avcodec_flush_buffers(ctx->h264_avctx); avcodec_flush_buffers(ctx->hevc_avctx); } 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, .flush = imm5_flush, .priv_data_size = sizeof(IMM5Context), .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, };