[Mesa-dev] [PATCH 13/20] radeon/uvd: reconstruct mjpeg bitstream

[Leo Liu]

The current tier 1 mjpeg firmware only supports at the bitstream
level, the later tier 2 support will be at the buffers level with
newer hardware.

Signed-off-by: Leo Liu <leo.liu at amd.com>
---
 src/gallium/drivers/radeon/radeon_uvd.c | 136 ++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)

diff --git a/src/gallium/drivers/radeon/radeon_uvd.c b/src/gallium/drivers/radeon/radeon_uvd.c
index 5e15f94de3..59d1f199e9 100644
--- a/src/gallium/drivers/radeon/radeon_uvd.c
+++ b/src/gallium/drivers/radeon/radeon_uvd.c
@@ -943,6 +943,128 @@ static struct ruvd_mpeg4 get_mpeg4_msg(struct ruvd_decoder *dec,
 	return result;
 }
 
+static void get_mjpeg_slice_header(struct ruvd_decoder *dec, struct pipe_mjpeg_picture_desc *pic)
+{
+	int size = 0, saved_size, len_pos, i;
+	uint16_t *bs;
+	uint8_t *buf = dec->bs_ptr;
+
+	/* SOI */
+	buf[size++] = 0xff;
+	buf[size++] = 0xd8;
+
+	/* DQT */
+	buf[size++] = 0xff;
+	buf[size++] = 0xdb;
+
+	len_pos = size++;
+	size++;
+
+	for (i = 0; i < 4; ++i) {
+		if (pic->quantization_table.load_quantiser_table[i] == 0)
+			continue;
+
+		buf[size++] = i;
+		memcpy((buf + size), &pic->quantization_table.quantiser_table, 64);
+		size += 64;
+	}
+
+	bs = (uint16_t*)&buf[len_pos];
+	*bs = util_bswap16(size - 4);
+
+	saved_size = size;
+
+	/* DHT */
+	buf[size++] = 0xff;
+	buf[size++] = 0xc4;
+
+	len_pos = size++;
+	size++;
+
+	for (i = 0; i < 2; ++i) {
+		if (pic->huffman_table.load_huffman_table[i] == 0)
+			continue;
+
+		buf[size++] = 0x00 | i;
+		memcpy((buf + size), &pic->huffman_table.table[i].num_dc_codes, 16);
+		size += 16;
+		memcpy((buf + size), &pic->huffman_table.table[i].dc_values, 12);
+		size += 12;
+	}
+
+	for (i = 0; i < 2; ++i) {
+		if (pic->huffman_table.load_huffman_table[i] == 0)
+			continue;
+
+		buf[size++] = 0x10 | i;
+		memcpy((buf + size), &pic->huffman_table.table[i].num_ac_codes, 16);
+		size += 16;
+		memcpy((buf + size), &pic->huffman_table.table[i].ac_values, 162);
+		size += 162;
+	}
+
+	bs = (uint16_t*)&buf[len_pos];
+	*bs = util_bswap16(size - saved_size - 2);
+
+	saved_size = size;
+
+	/* SOF */
+	buf[size++] = 0xff;
+	buf[size++] = 0xc0;
+
+	len_pos = size++;
+	size++;
+
+	buf[size++] = 0x08;
+
+	bs = (uint16_t*)&buf[size++];
+	*bs = util_bswap16(pic->picture_parameter.picture_height);
+	size++;
+
+	bs = (uint16_t*)&buf[size++];
+	*bs = util_bswap16(pic->picture_parameter.picture_width);
+	size++;
+
+	buf[size++] = pic->picture_parameter.num_components;
+
+	for (i = 0; i < pic->picture_parameter.num_components; ++i) {
+		buf[size++] = pic->picture_parameter.components[i].component_id;
+		buf[size++] = pic->picture_parameter.components[i].h_sampling_factor << 4 |
+			pic->picture_parameter.components[i].v_sampling_factor;
+		buf[size++] = pic->picture_parameter.components[i].quantiser_table_selector;
+	}
+
+	bs = (uint16_t*)&buf[len_pos];
+	*bs = util_bswap16(size - saved_size - 2);
+
+	saved_size = size;
+
+	/* SOS */
+	buf[size++] = 0xff;
+	buf[size++] = 0xda;
+
+	len_pos = size++;
+	size++;
+
+	buf[size++] = pic->slice_parameter.num_components;
+
+	for (i = 0; i < pic->slice_parameter.num_components; ++i) {
+		buf[size++] = pic->slice_parameter.components[i].component_selector;
+		buf[size++] = pic->slice_parameter.components[i].dc_table_selector << 4 |
+			pic->slice_parameter.components[i].ac_table_selector;
+	}
+
+	buf[size++] = 0x00;
+	buf[size++] = 0x3f;
+	buf[size++] = 0x00;
+
+	bs = (uint16_t*)&buf[len_pos];
+	*bs = util_bswap16(size - saved_size - 2);
+
+	dec->bs_ptr += size;
+	dec->bs_size += size;
+}
+
 /**
  * destroy this video decoder
  */
@@ -1021,6 +1143,7 @@ static void ruvd_decode_bitstream(struct pipe_video_codec *decoder,
 				  const unsigned *sizes)
 {
 	struct ruvd_decoder *dec = (struct ruvd_decoder*)decoder;
+	enum pipe_video_format format = u_reduce_video_profile(picture->profile);
 	unsigned i;
 
 	assert(decoder);
@@ -1028,10 +1151,16 @@ static void ruvd_decode_bitstream(struct pipe_video_codec *decoder,
 	if (!dec->bs_ptr)
 		return;
 
+	if (format == PIPE_VIDEO_FORMAT_MJPEG)
+		get_mjpeg_slice_header(dec, (struct pipe_mjpeg_picture_desc*)picture);
+
 	for (i = 0; i < num_buffers; ++i) {
 		struct rvid_buffer *buf = &dec->bs_buffers[dec->cur_buffer];
 		unsigned new_size = dec->bs_size + sizes[i];
 
+		if (format == PIPE_VIDEO_FORMAT_MJPEG)
+			new_size += 2; /* save for EOI */
+
 		if (new_size > buf->res->buf->size) {
 			dec->ws->buffer_unmap(buf->res->buf);
 			if (!rvid_resize_buffer(dec->screen, dec->cs, buf, new_size)) {
@@ -1051,6 +1180,13 @@ static void ruvd_decode_bitstream(struct pipe_video_codec *decoder,
 		dec->bs_size += sizes[i];
 		dec->bs_ptr += sizes[i];
 	}
+
+	if (format == PIPE_VIDEO_FORMAT_MJPEG) {
+		((uint8_t *)dec->bs_ptr)[0] = 0xff;	/* EOI */
+		((uint8_t *)dec->bs_ptr)[1] = 0xd9;
+		dec->bs_size += 2;
+		dec->bs_ptr += 2;
+	}
 }
 
 /**
-- 
2.11.0