38 #define PALETTE_COUNT 256 39 #define CHECK_STREAM_PTR(n) \ 40 if ((stream_ptr + n) > s->size ) { \ 41 av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \ 42 stream_ptr + n, s->size); \ 51 const unsigned char *
buf;
83 int block_ptr, pixel_ptr;
87 int blocks_wide, blocks_high;
93 unsigned char byte_a, byte_b;
96 unsigned char colors[8];
97 unsigned char *pixels = s->
frame->
data[0];
104 total_blocks = blocks_wide * blocks_high;
106 row_dec = stride + 4;
108 for (block_y = blocks_high; block_y > 0; block_y--) {
109 block_ptr = ((block_y * 4) - 1) *
stride;
110 for (block_x = blocks_wide; block_x > 0; block_x--) {
113 block_ptr += block_inc;
119 pixel_ptr = block_ptr;
123 byte_a = s->
buf[stream_ptr++];
124 byte_b = s->
buf[stream_ptr++];
127 if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
129 else if ((byte_b & 0xFC) == 0x84) {
131 skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
132 }
else if (byte_b < 0x80) {
134 flags = (byte_b << 8) | byte_a;
137 colors[0] = s->
buf[stream_ptr++];
138 colors[1] = s->
buf[stream_ptr++];
140 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
141 for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
142 pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
143 pixel_ptr -= row_dec;
145 }
else if (byte_b >= 0x90) {
147 flags = (byte_b << 8) | byte_a;
150 memcpy(colors, &s->
buf[stream_ptr], 8);
153 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
154 for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
155 pixels[pixel_ptr++] =
156 colors[((pixel_y & 0x2) << 1) +
157 (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
158 pixel_ptr -= row_dec;
164 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
165 for (pixel_x = 0; pixel_x < 4; pixel_x++)
166 pixels[pixel_ptr++] = colors[0];
167 pixel_ptr -= row_dec;
171 block_ptr += block_inc;
183 int block_ptr, pixel_ptr;
185 int pixel_x, pixel_y;
186 int block_x, block_y;
187 int blocks_wide, blocks_high;
193 unsigned char byte_a, byte_b;
194 unsigned short flags;
196 unsigned short colors[8];
197 unsigned short *pixels = (
unsigned short *)s->
frame->
data[0];
204 total_blocks = blocks_wide * blocks_high;
208 for (block_y = blocks_high; block_y > 0; block_y--) {
209 block_ptr = ((block_y * 4) - 1) *
stride;
210 for (block_x = blocks_wide; block_x > 0; block_x--) {
213 block_ptr += block_inc;
219 pixel_ptr = block_ptr;
223 byte_a = s->
buf[stream_ptr++];
224 byte_b = s->
buf[stream_ptr++];
227 if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
229 }
else if ((byte_b & 0xFC) == 0x84) {
231 skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
232 }
else if (byte_b < 0x80) {
234 flags = (byte_b << 8) | byte_a;
242 if (colors[0] & 0x8000) {
258 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
259 for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
260 pixels[pixel_ptr++] =
261 colors[((pixel_y & 0x2) << 1) +
262 (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
263 pixel_ptr -= row_dec;
267 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
268 for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
269 pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
270 pixel_ptr -= row_dec;
275 colors[0] = (byte_b << 8) | byte_a;
277 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
278 for (pixel_x = 0; pixel_x < 4; pixel_x++)
279 pixels[pixel_ptr++] = colors[0];
280 pixel_ptr -= row_dec;
284 block_ptr += block_inc;
291 void *
data,
int *got_frame,
295 int buf_size = avpkt->
size;
static int msvideo1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
This structure describes decoded (raw) audio or video data.
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
const unsigned char * buf
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
AVCodec ff_msvideo1_decoder
static void msvideo1_decode_16bit(Msvideo1Context *s)
common internal API header
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
int width
picture width / height.
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int palette_has_changed
Tell user application that palette has changed from previous frame.
static void msvideo1_decode_8bit(Msvideo1Context *s)
#define CHECK_STREAM_PTR(n)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
common internal api header.
#define AV_PIX_FMT_RGB555
static av_cold int init(AVCodecParserContext *s)
uint8_t * av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.