FFmpeg
imm5.c
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1 /*
2  * Copyright (c) 2019 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/intreadwrite.h"
22 
23 #include "avcodec.h"
24 #include "internal.h"
25 
26 typedef struct IMM5Context {
27  AVCodecContext *h264_avctx; // wrapper context for H264
28  AVCodecContext *hevc_avctx; // wrapper context for HEVC
29 } IMM5Context;
30 
31 static const struct IMM5_unit {
34 } IMM5_units[14] = {
35  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 },
36  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 },
37  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 },
38  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 },
39  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 },
40  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 },
41  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 },
42  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 },
43  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 },
44  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 },
45  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 },
46  { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 },
47  { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
48  { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
49 };
50 
51 static av_cold int imm5_init(AVCodecContext *avctx)
52 {
53  IMM5Context *ctx = avctx->priv_data;
54  const AVCodec *codec;
55  int ret;
56 
58  if (!codec)
59  return AVERROR_BUG;
60  ctx->h264_avctx = avcodec_alloc_context3(codec);
61  if (!ctx->h264_avctx)
62  return AVERROR(ENOMEM);
63  ctx->h264_avctx->thread_count = 1;
64  ctx->h264_avctx->flags = avctx->flags;
65  ctx->h264_avctx->flags2 = avctx->flags2;
66  ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL);
67  if (ret < 0)
68  return ret;
69 
71  if (!codec)
72  return AVERROR_BUG;
73  ctx->hevc_avctx = avcodec_alloc_context3(codec);
74  if (!ctx->hevc_avctx)
75  return AVERROR(ENOMEM);
76  ctx->hevc_avctx->thread_count = 1;
77  ctx->hevc_avctx->flags = avctx->flags;
78  ctx->hevc_avctx->flags2 = avctx->flags2;
79  ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL);
80  if (ret < 0)
81  return ret;
82 
83  return 0;
84 }
85 
86 static int imm5_decode_frame(AVCodecContext *avctx, void *data,
87  int *got_frame, AVPacket *avpkt)
88 {
89  IMM5Context *ctx = avctx->priv_data;
90  AVFrame *frame = data;
91  AVCodecContext *codec_avctx = ctx->h264_avctx;
92  int ret;
93 
94  if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
95  int codec_type = avpkt->data[1];
96  int index = avpkt->data[10];
97  int new_size = AV_RL32(avpkt->data + 4);
98  int offset, off;
99 
100  if (codec_type == 0xA) {
101  codec_avctx = ctx->hevc_avctx;
102  } else if (index == 17) {
103  index = 4;
104  } else if (index == 18) {
105  index = 5;
106  }
107 
108  if (index >= 1 && index <= 12) {
109  ret = av_packet_make_writable(avpkt);
110  if (ret < 0)
111  return ret;
112 
113  index -= 1;
114  off = offset = IMM5_units[index].len;
115  if (codec_type == 2) {
116  offset += IMM5_units[12].len;
117  } else {
118  offset += IMM5_units[13].len;
119  }
120 
121  avpkt->data += 24 - offset;
122  avpkt->size = new_size + offset;
123 
124  memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
125  if (codec_type == 2) {
126  memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
127  } else {
128  memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
129  }
130  } else {
131  avpkt->data += 24;
132  avpkt->size -= 24;
133  }
134  }
135 
136  ret = avcodec_send_packet(codec_avctx, avpkt);
137  if (ret < 0) {
138  av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
139  return ret;
140  }
141 
142  ret = avcodec_receive_frame(codec_avctx, frame);
143  if (ret < 0)
144  return ret;
145 
146  avctx->pix_fmt = codec_avctx->pix_fmt;
147  avctx->coded_width = codec_avctx->coded_width;
148  avctx->coded_height = codec_avctx->coded_height;
149  avctx->width = codec_avctx->width;
150  avctx->height = codec_avctx->height;
151  avctx->bit_rate = codec_avctx->bit_rate;
152  avctx->colorspace = codec_avctx->colorspace;
153  avctx->color_range = codec_avctx->color_range;
154  avctx->color_trc = codec_avctx->color_trc;
155  avctx->color_primaries = codec_avctx->color_primaries;
156  avctx->chroma_sample_location = codec_avctx->chroma_sample_location;
157 
158  *got_frame = 1;
159 
160  return avpkt->size;
161 }
162 
163 static void imm5_flush(AVCodecContext *avctx)
164 {
165  IMM5Context *ctx = avctx->priv_data;
166 
169 }
170 
172 {
173  IMM5Context *ctx = avctx->priv_data;
174 
177 
178  return 0;
179 }
180 
182  .name = "imm5",
183  .long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
184  .type = AVMEDIA_TYPE_VIDEO,
185  .id = AV_CODEC_ID_IMM5,
186  .init = imm5_init,
187  .decode = imm5_decode_frame,
188  .close = imm5_close,
189  .flush = imm5_flush,
190  .priv_data_size = sizeof(IMM5Context),
191  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
193 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1756
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1618
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2203
int size
Definition: avcodec.h:1481
enum AVMediaType codec_type
Definition: rtp.c:37
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1778
AVCodec.
Definition: avcodec.h:3492
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
uint8_t
#define av_cold
Definition: attributes.h:82
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
static void imm5_flush(AVCodecContext *avctx)
Definition: imm5.c:163
uint8_t * data
Definition: avcodec.h:1480
ptrdiff_t size
Definition: opengl_enc.c:100
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2210
#define av_log(a,...)
AVCodecContext * hevc_avctx
Definition: imm5.c:28
int av_packet_make_writable(AVPacket *pkt)
Create a writable reference for the data described by a given packet, avoiding data copy if possible...
Definition: avpacket.c:682
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Call avcodec_open2 recursively by decrementing counter, unlocking mutex, calling the function and the...
Definition: utils.c:536
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
Definition: decode.c:739
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1648
const char * name
Name of the codec implementation.
Definition: avcodec.h:3499
uint8_t bits
Definition: vp3data.h:202
static av_cold int imm5_close(AVCodecContext *avctx)
Definition: imm5.c:171
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
int width
picture width / height.
Definition: avcodec.h:1741
AVCodecContext * h264_avctx
Definition: imm5.c:27
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2182
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
static const struct IMM5_unit IMM5_units[14]
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2827
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
Definition: decode.c:2031
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:676
Libavcodec external API header.
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer...
Definition: options.c:171
main external API structure.
Definition: avcodec.h:1568
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:896
static av_cold int imm5_init(AVCodecContext *avctx)
Definition: imm5.c:51
uint8_t len
Definition: imm5.c:33
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int coded_height
Definition: avcodec.h:1756
int index
Definition: gxfenc.c:89
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2196
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2189
Definition: imm5.c:31
uint8_t bits[14]
Definition: imm5.c:32
static int imm5_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: imm5.c:86
AVCodec ff_imm5_decoder
Definition: imm5.c:181
common internal api header.
void * priv_data
Definition: avcodec.h:1595
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1655
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1457